From pfthekan at gmail.com  Mon Oct  2 13:06:52 2023
From: pfthekan at gmail.com (Paul Thekan)
Date: Mon, 2 Oct 2023 10:06:52 -0700
Subject: [Milsurplus] NC-183 MR R651/URR 39 manual wtd
Message-ID: <CAK4LMKNfY7-q834e0Q7auD0A7_8ynxLd67L+HQN1GBYaiWb2=w@mail.gmail.com>

Could someone who has/had this radio please tell me if the manual for the
NC-183D will work for this radio.
Thank you
Paul
N6FEG
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From navy.radio at gmail.com  Mon Oct  2 14:11:18 2023
From: navy.radio at gmail.com (Nick England)
Date: Mon, 2 Oct 2023 14:11:18 -0400
Subject: [Milsurplus] NC-183 MR R651/URR 39 manual wtd
In-Reply-To: <CAK4LMKNfY7-q834e0Q7auD0A7_8ynxLd67L+HQN1GBYaiWb2=w@mail.gmail.com>
References: <CAK4LMKNfY7-q834e0Q7auD0A7_8ynxLd67L+HQN1GBYaiWb2=w@mail.gmail.com>
Message-ID: <CAB55hNc85D9j7+wZ58S=8JKnzqM7321DBz0w0kkkNa5m0nb_NQ@mail.gmail.com>

If anyone has an actual URR-39 manual can you please tell me the manual
number.
My catalogs don't list the manual.
Thanks
Nick England K4NYW
www.navy-radio.com


On Mon, Oct 2, 2023 at 1:07?PM Paul Thekan <pfthekan at gmail.com> wrote:

> Could someone who has/had this radio please tell me if the manual for the
> NC-183D will work for this radio.
> Thank you
> Paul
> N6FEG
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From RAFANTINI at salisbury.edu  Mon Oct  2 16:31:01 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Mon, 2 Oct 2023 20:31:01 +0000
Subject: [Milsurplus] GRC-106 Video
Message-ID: <DM8P220MB0472618456DB853E6BA5E8A3B8C5A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

In a never ending attempt for me to shamelessly promote one of my videos I am telling everyone that I just put a video up of the innerworkings of the AN/GRC-106 amplifiers:

https://www.youtube.com/watch?v=P5_oOKCMN20

Ray F/KA3EKH
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From r390a.urr at gmail.com  Mon Oct  2 16:40:30 2023
From: r390a.urr at gmail.com (Dave Merrill)
Date: Mon, 2 Oct 2023 15:40:30 -0500
Subject: [Milsurplus] GRC-106 Video
In-Reply-To: <DM8P220MB0472618456DB853E6BA5E8A3B8C5A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
References: <DM8P220MB0472618456DB853E6BA5E8A3B8C5A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <CAGRTi8VM4DFxs7sm6FWdfycoGXu9uQQrUMX0px3iK9gYDQUQhw@mail.gmail.com>

Very cool, thanks for posting!

Dave N9ZC

On Mon, Oct 2, 2023, 3:32 PM Ray Fantini <RAFANTINI at salisbury.edu> wrote:

> In a never ending attempt for me to shamelessly promote one of my videos I
> am telling everyone that I just put a video up of the innerworkings of the
> AN/GRC-106 amplifiers:
>
>
>
> https://www.youtube.com/watch?v=P5_oOKCMN20
>
>
>
> Ray F/KA3EKH
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From w4ax.mack at gmail.com  Tue Oct  3 09:48:37 2023
From: w4ax.mack at gmail.com (Mack McCormick)
Date: Tue, 3 Oct 2023 09:48:37 -0400
Subject: [Milsurplus] BC-610 India RY 5 over current relay trips when mic
	unkeyed or heavy modulation
Message-ID: <CAFzyUt4mwzvDhJ58w1pGaFRJW9zhtOCbXE6-+VvH6VBvwMaXdw@mail.gmail.com>

Friends,

I could use some advice please. I have a BC-610I that has performed
flawlessly at least one a week for over 15 years.

Just recently RY5, the over current relay, began tripping when I unkeyed
the transmitter. I'd appreciate any suggestions on why this may be
occurring and how to prevent it from tripping when I unkey. Has the relay
become defective? I didn't see any adjustment procedure in the manual like
there is on my T-368.

Here are some facts. Plate current is 205ma. I see/hear no signs of arcing
on any high voltage wiring. I have replaced the 3B28's, 150th's and 250th
all with NOS tubes. If I push the modulation level a bit on the BC-214
speech amp the HV relay will also trip. I know the normal trip point of
this relay is 670 to 710ma.

Does anyone have a replacement RY5 from a parts rig? Have a suggested
circuit to replace it with a modern DPDT relay (I'm thinking of a resistor
in parallel with the relay coil that would pull the coil in when 700ma is
pulled through it). Could the spark gap on the bottom of the 11H filter
choke be arcing during unkeying?

73,

Mack
W4AX
https://www.qrz.com/db/w4ax
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From mjcal77 at yahoo.com  Tue Oct  3 12:26:43 2023
From: mjcal77 at yahoo.com (CL in NC)
Date: Tue, 3 Oct 2023 16:26:43 +0000 (UTC)
Subject: [Milsurplus] Milsurp demos
References: <1642707978.5605189.1696350403714.ref@mail.yahoo.com>
Message-ID: <1642707978.5605189.1696350403714@mail.yahoo.com>

Perhaps everyone knows this, but it was new to me.  At an air show at Triple Trees in Woodruff SC, we had a big display of the equipment we obtained so far for the Lucky 13 B17 restoration.  While I could not bring my SCR274N set up, I did bring a dynamotor run BC375 and assorted TU's, and a BC348.  I had hopes of establishing scheduled communications with a couple hams, but when I set up , the racket from various switching power supplies in and around the facility, plus the 4 amplidynes running on the 2 machine gun turrets that where up and running, made it impossible.  (I think it was Hammarlund that made a lead filter kit to reduce the RFI from the amplidynes in WW II, but these did not have them) I did have it up and running on a dummy load so folks could PTT and press the key and see it putting out power.  I about talked myself hoarse giving demos all day, with one lady who came specifically to see this gear.  Her Grandpa was a radio op on a B17 and she had pics of him at position, and was almost at tears when she could operate the gear.  Her daughter took pics and videos of her at the controls.  So instead of demos at a hamfest, preaching to the choir, go visit an airshow with WW II aircraft and give the folks a show with working gear, plus any shows featuring military ground equipment would be a venue for all the earth based radios.  It was also a fundraiser for us, but any bonafide milsurp club could probably do a similar thing and raise some funds for the purchase and repair of gear.

Charlie, W4MEC in NC.

From briankn4r at gmail.com  Wed Oct  4 11:14:48 2023
From: briankn4r at gmail.com (Brian Harrison)
Date: Wed, 4 Oct 2023 11:14:48 -0400
Subject: [Milsurplus] radio with Vietnamese markings? Chinese military
	radios?
Message-ID: <B59F80C1-1C44-4D7B-A3ED-C320186FA07A@gmail.com>

Hi all,

I?m looking for radios (or pictures of radios) with Vietnamese markings

I?m also looking for any Vietnam-era Chinese made radios such as the 102E or XD6, (or S1031 - the ?export" model of these with English front panel markings)
I?m also looking for a Chinese 7512 HF receiver

Tnx!

brian
kn4r

From Kargo_cult at msn.com  Wed Oct  4 17:08:15 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Wed, 4 Oct 2023 21:08:15 +0000
Subject: [Milsurplus] Wire tapping NVA comms Vietnam ?
Message-ID: <CO6PR19MB54348F44F91A5A9620874008E4CBA@CO6PR19MB5434.namprd19.prod.outlook.com>

This clipping is from a memoir in 'Vietnam' magazine, August 2013.
I had never heard about this kind of wiretap in Vietnam before.
Any comment, or identification of the equipment ?
Tnx-
-Hue Miller,
Newport, Oregon
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From briankn4r at gmail.com  Wed Oct  4 17:23:58 2023
From: briankn4r at gmail.com (Brian Harrison)
Date: Wed, 4 Oct 2023 17:23:58 -0400
Subject: [Milsurplus] Wire tapping NVA comms Vietnam ?
In-Reply-To: <CO6PR19MB54348F44F91A5A9620874008E4CBA@CO6PR19MB5434.namprd19.prod.outlook.com>
References: <CO6PR19MB54348F44F91A5A9620874008E4CBA@CO6PR19MB5434.namprd19.prod.outlook.com>
Message-ID: <57B8D25D-4142-4386-9A13-566973551DC2@gmail.com>

Hue,

Yes

Here?s some info from page 99 of the book ?The Most Secret War: Army Signals Intelligence in Vietnam?

best,
brian
kn4r

One of the major problems faced by wiretap teams was that the VC/NVA units would daily send runners along the lines to check them. Two ASA engineers working at Vint Hill Farms Station came up with the LEFT TWIST system where a transmitter in the form of a pole was dropped from a helicopter. Actual results in the field in 1971 proved mixed, and future trials were cut short when the course of the war began to change. The drawdown of US combat forces led to fewer deployment opportunities for landline intercept and even- tually brought an end to the mission altogeth- er. Time had finally run out on ASA?s landline mission. However, lingering questions remained as to why lessons learned as far back as 1966 were continually ignored. The technological advances in the CIRCUS ACT program were achieved at a high cost giventhe numbers of casualties suffered by the installation teams and the limited amount of usable intelligence extracted.




> On Oct 4, 2023, at 5:08 PM, Hubert Miller <Kargo_cult at msn.com> wrote:
> 
> This clipping is from a memoir in ?Vietnam? magazine, August 2013.
> I had never heard about this kind of wiretap in Vietnam before.
> Any comment, or identification of the equipment ?
> Tnx-
> -Hue Miller,
> Newport, Oregon

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From Kargo_cult at msn.com  Wed Oct  4 18:53:59 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Wed, 4 Oct 2023 22:53:59 +0000
Subject: [Milsurplus] A Remarkable QSO WWII - AWA OTB - Aug 1994
Message-ID: <CO6PR19MB5434E3702F7D06ABF2775164E4CBA@CO6PR19MB5434.namprd19.prod.outlook.com>


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From brooke at pacific.net  Wed Oct  4 19:18:08 2023
From: brooke at pacific.net (Brooke Clarke)
Date: Wed, 4 Oct 2023 16:18:08 -0700
Subject: [Milsurplus] Milsurplus Digest, Vol 234, Issue 4
In-Reply-To: <mailman.5910.1696460051.25502.milsurplus@mailman.qth.net>
References: <mailman.5910.1696460051.25502.milsurplus@mailman.qth.net>
Message-ID: <1c69c9ad-13f5-7afb-9c27-3c922a1844e5@pacific.net>

Hi:

I found this web page:
http://www.rjsmith.com/sog-history-excerpt.html
https://en.wikipedia.org/wiki/Operation_Tailwind

-- 
Have Fun,

Brooke Clarke
https://www.PRC68.com
axioms:
1. The extent to which you can fix or improve something will be limited by how well you understand how it works.
2. Everybody, with no exceptions, holds false beliefs.

-------- Original Message --------
> Date: Wed, 4 Oct 2023 17:23:58 -0400
> From: Brian Harrison<briankn4r at gmail.com>
> To: milsurplus listserv<milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] Wire tapping NVA comms Vietnam ?
> Message-ID:<57B8D25D-4142-4386-9A13-566973551DC2 at gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hue,
>
> Yes
>
> Here?s some info from page 99 of the book ?The Most Secret War: Army Signals Intelligence in Vietnam?
>
> best,
> brian
> kn4r
>
> One of the major problems faced by wiretap teams was that the VC/NVA units would daily send runners along the lines to check them. Two ASA engineers working at Vint Hill Farms Station came up with the LEFT TWIST system where a transmitter in the form of a pole was dropped from a helicopter. Actual results in the field in 1971 proved mixed, and future trials were cut short when the course of the war began to change. The drawdown of US combat forces led to fewer deployment opportunities for landline intercept and even- tually brought an end to the mission altogeth- er. Time had finally run out on ASA?s landline mission. However, lingering questions remained as to why lessons learned as far back as 1966 were continually ignored. The technological advances in the CIRCUS ACT program were achieved at a high cost giventhe numbers of casualties suffered by the installation teams and the limited amount of usable intelligence extracted.

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From RAFANTINI at salisbury.edu  Thu Oct  5 11:00:19 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Thu, 5 Oct 2023 15:00:19 +0000
Subject: [Milsurplus] W3A Announcement
Message-ID: <DM8P220MB0472922432D220EF3BA4D7F2B8CAA@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Continuity of Government
Inspired by this government construct it is necessary for us to have a contingent plan for the field operations of the Able Archer 83 event (October 21st and 22nd).
As some may already know due to changes in personal at Delaware State Parks we have lost the ability, at least at this time to have overnight access to the building that we have been using at Fort Miles. They are willing to allow us access during regular hours of operation but not at night.
We have a contingency plan that we will be activating. We will be operating multipole stations running voice, digital and teletype from a clandestine location located in Delaware, Cold War Supply Dump X-Ray.
Located somewhere between the New Castel and Kent County Border X-Ray will accommodate all aspects of W3A providing everything necessary for set up of equipment including my M151, antennas and any additional equipment for operators who may wish to attend.
As always, we invite anyone to attend, with or without equipment to take part in this event. In addition to the regular on-air ops for W3A I also intend to participate in the MMRCG RTTY Net on 7087 @ 0900 local and the MMRCG 7296 Net at 1000 that Saturday. Would like to also attempt a Cross Country contact with the West Coast on seventeen meters again.
If you would like to participate please contact me or Walt directly and we can provide all the details. It is sufficient to say that we will be operating from a location that offers plenty of space for vehicles, outside operation or operation in existing shelters with electrical power. Overnight camping will be permitted.

AA83 web site:

https://sites.google.com/site/ablearcher1983w3a


Ray F/KA3EKH
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From ka8vit at ka8vit.com  Thu Oct  5 15:16:30 2023
From: ka8vit at ka8vit.com (Bill KA8VIT)
Date: Thu, 5 Oct 2023 15:16:30 -0400 (EDT)
Subject: [Milsurplus] Wire tapping NVA comms Vietnam ?
Message-ID: <105058050.972157.1696533390687@email.ionos.com>

Not unlike the Ivy Bell missions done by the submarine force.
 
73 - BILL KA8VIT / W8COD
 
 
====================================
Bill Chaikin, KA8VIT
Chief Radio Operator
WW2 Submarine USS COD SS-224 (NECO)
USS COD Amateur Radio Club - W8COD
 
ka8vit at ka8vit.com
http://ka8vit.com
http://www.usscod.org
====================================
 

> On 10/04/2023 5:08 PM EDT Hubert Miller <kargo_cult at msn.com> wrote:
>  
>  
> 
> This clipping is from a memoir in ?Vietnam? magazine, August 2013.
> 
> I had never heard about this kind of wiretap in Vietnam before.
> 
> Any comment, or identification of the equipment ?
> 
> Tnx-
> 
> -Hue Miller,
> 
> Newport, Oregon
> 
> ______________________________________________________________ Milsurplus mailing list Home: http://mailman.qth.net/mailman/listinfo/milsurplus Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Milsurplus at mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
> 
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From Kargo_cult at msn.com  Thu Oct  5 19:57:06 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Thu, 5 Oct 2023 23:57:06 +0000
Subject: [Milsurplus] Receiver systems CJA and CJC ?
Message-ID: <CO6PR19MB5434F430CCEFD6B23E9D272BE4CAA@CO6PR19MB5434.namprd19.prod.outlook.com>

What were these receivers? I found a single page of photo and some specs. I do not know the publication source, but it says

Change 5  April 1972     B.R. 2414 ( 1 )

Receiver CJA consists of receiver 5820-99-916-4679    and   synthesizer frequency  5820-99-916-4675
Receiver CJC  is the receiver only.
Not clear to me but looks like CJC receiver has an actual HFO which can be locked to the synthesizer.  No manufacturer listed. Looks like receiver basic does have a slide rule
type dial. Who was this, FAA ?
-Hue Miller
Newport, Oregon

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From sgm460122 at yahoo.com  Thu Oct  5 20:13:16 2023
From: sgm460122 at yahoo.com (Rich MC Clung)
Date: Fri, 6 Oct 2023 00:13:16 +0000 (UTC)
Subject: [Milsurplus] Receiver systems CJA and CJC ?
References: <729715167.6335285.1696551196221.ref@mail.yahoo.com>
Message-ID: <729715167.6335285.1696551196221@mail.yahoo.com>

The main CJA/CJC was the British HF Fleet receiver from the early 1960's and fitted in all ICS1 [STANDARD 3A] ships/submarines and also in ICS1 Mixed Fit [STANDARD 3B] ships. After the introduction of the FTA, is could receive all frequencies from VLF to HF.?

DETAILS:https://www.commsmuseum.co.uk/receivers/94%20Rx%20CJA/pdfs/cja%20cjc.pdf

CJA:https://www.commsmuseum.co.uk/receivers/94%20Rx%20CJA/pdfs/cjaimage.pdf

CJC:https://www.commsmuseum.co.uk/receivers/94%20Rx%20CJA/pdfs/cjcimage.pdf

RICH? WA6KNW
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From reuben.popp at gmail.com  Thu Oct  5 20:35:11 2023
From: reuben.popp at gmail.com (Reuben Popp)
Date: Thu, 5 Oct 2023 19:35:11 -0500
Subject: [Milsurplus] T-195 availability?
Message-ID: <CAB-aZK91iZfe8y-hsjFyHbeFo5cOPbKSyc98df8Y0r_n0RDz7Q@mail.gmail.com>

Hello all,

What with Fair Radio closing its doors soon, I'm curious.. how "common" are
surplus T-195 units?  Not that I have the $$$ right now, but I would
eventually like to get one to have a functioning GRC-19.

Thanks in advance
Reuben
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From navy.radio at gmail.com  Fri Oct  6 11:19:42 2023
From: navy.radio at gmail.com (Nick England)
Date: Fri, 6 Oct 2023 11:19:42 -0400
Subject: [Milsurplus] Navy TBT transmitter?
Message-ID: <CAB55hNcKDZo4Q3K-dABYfy42uuJMz_m403horx3-nm3DJ+_3Sw@mail.gmail.com>

The USS North Carolina blueprints show a TBT in Radio 2 (transmitters)
I have very little info
1939 vintage - made by RCA
VHF Transmitter 60-200mc, phone 50 watts
listed in SHIPS 242A as "experimental" and paired with RAQ receiver which
is listed as "obsolete"

I'm guessing these were replaced very early on by TBS.

Does anyone know more?

Nick England K4NYW
www.navy-radio.com
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From navy.radio at gmail.com  Fri Oct  6 13:46:52 2023
From: navy.radio at gmail.com (Nick England)
Date: Fri, 6 Oct 2023 13:46:52 -0400
Subject: [Milsurplus] USN Communications acronyms - 1974
Message-ID: <CAB55hNeFPXrDUfLWzLDvM-jdpHPrFoB+1NncnE0jFxmZaHgn+Q@mail.gmail.com>

I've been looking at a maintenance manpower survey for USN shore receiver
sites. It lists task and receivers for various circuits -
There several acronyms I don't recognize -
What are "RIO", "S/C", and "M/C" ??
....

S/C Ship-Shore Operator
S/C Ship/Shore Termination Receivers
S/C NATO Broadcast Receivers
S/C Broadcast (NRTT)

M/C Ship-Shore Operator
M/C Point-to-Point Operator
Fleet M/C Broadcast Receivers
M/C Ship/Shore Termination Receivers

Point to Point (RIO) Receivers
....
Cheers,
Nick England K4NYW
www.navy-radio.com
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From navy.radio at gmail.com  Sun Oct  8 16:03:33 2023
From: navy.radio at gmail.com (Nick England)
Date: Sun, 8 Oct 2023 16:03:33 -0400
Subject: [Milsurplus] FWIW - Navy R-388 and 51J-4 procurement
Message-ID: <CAB55hNfUSKeMYNL4HKEQGoDVuv=sGioyZkO70xn908mPSi+L6Q@mail.gmail.com>

Reading a congressional hearing on sole source procurement I came across a
summary of Collins contracts 1958-62 including the following -

NObsr-75379 (June 1958) - 51J-4 - 10 units
NObsr-81258 (April 1960) - R-388 - 201 units

I hadn't previously had any record of these contracts
https://www.navy-radio.com/rcvrs/r388.htm

Nick England K4NYW
www.navy-radio.com
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From briankn4r at gmail.com  Sun Oct  8 16:06:03 2023
From: briankn4r at gmail.com (Brian Harrison)
Date: Sun, 8 Oct 2023 16:06:03 -0400
Subject: [Milsurplus] Enemy Radios of the Vietnam Wars,
 and the ASA  - new Antique Wireless Association Youtube
References: <EC5E460C-9F2E-4BFF-8CD8-2C91E3532D78@gmail.com>
Message-ID: <0DD59B57-A8DB-4DF5-9A1F-EF4E9873E53E@gmail.com>

https://youtu.be/X5q_EigflcA

Discusses the commonly-used HF and VHF radios used by the VC AND NVA during the Vietnam War
also the Army Security Agency (ASA)?s ground-based and aerial radio direction finding (ARDF) - The Best Intelligence of the War!

PS this is v1.0, I would appreciate hearing from anyone directly with further information and pictures.
Also anyone associated with the USAF Security Service, Naval Security Group (NSG), PRONTO, others...

Thank you,
brian
kn4r


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From navy.radio at gmail.com  Sun Oct  8 17:23:55 2023
From: navy.radio at gmail.com (Nick England)
Date: Sun, 8 Oct 2023 17:23:55 -0400
Subject: [Milsurplus] FWIW - Navy contracts with Collins 1956-62
Message-ID: <CAB55hNc5yZzrhAoYEB7Tm-xD48hdTrRZtePpmxOCYFBVHfW7xA@mail.gmail.com>

 Reading a congressional hearing on sole source procurement (yet another
internet time sink), I came across this summary of Collins contracts for
the US Navy. Shows quantities for some of our old friends like URC-32,
R-388, ARR-41, ARC-38, PRC-47, TRC-75, and KWM-2
(and what are 522-1298-00 transceivers?)
https://www.navy-radio.com/misc/collins-navy-1956.pdf

Nick England K4NYW
www.navy-radio.com
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From r390a.urr at gmail.com  Mon Oct  9 10:43:50 2023
From: r390a.urr at gmail.com (Dave Merrill)
Date: Mon, 9 Oct 2023 09:43:50 -0500
Subject: [Milsurplus] Recognize this Dynamotor?
Message-ID: <CAGRTi8Wb3Uo6s1qVKCWqO47wpmbmMkpzeQo_qRx=8EBSB3XuMw@mail.gmail.com>

Any clue where was it used? Same dimensions as a DM-32.

Dave N9ZC
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From r390a.urr at gmail.com  Mon Oct  9 11:55:49 2023
From: r390a.urr at gmail.com (Dave Merrill)
Date: Mon, 9 Oct 2023 10:55:49 -0500
Subject: [Milsurplus] FWIW - Navy contracts with Collins 1956-62
In-Reply-To: <CAB55hNc5yZzrhAoYEB7Tm-xD48hdTrRZtePpmxOCYFBVHfW7xA@mail.gmail.com>
References: <CAB55hNc5yZzrhAoYEB7Tm-xD48hdTrRZtePpmxOCYFBVHfW7xA@mail.gmail.com>
Message-ID: <CAGRTi8VY1peUUo=YbZUp8nRUGVpV4460Nb2NqkeRNMzF8+GkEg@mail.gmail.com>

I have an "INSTRUCTION BOOK FOR RADIO RECEIVER R-388/URR" dated 5 September
1951 which states "Manufactured by The Hallicrafters Company Chicago,
Illinois Order Number 3357-Phila-52"

This looks just like the Collins version of the manual, enameled paper,
same typeface, manila covers, etc.

So do you suppose this was one of those deals where a second source was
required and Collins either shipped complete or incomplete units at
wholesale to Hallicrafters for final assembly and delivery? I'm sure
Hallicrafters was more than capable to make them from scratch but setting
up the tooling, procurement, assembly line, quality control plus everything
else would have been expensive.

Apparently they exist because one is on Etsy.

Dave N9ZC

On Sun, Oct 8, 2023, 4:24 PM Nick England <navy.radio at gmail.com> wrote:

> Reading a congressional hearing on sole source procurement (yet another
> internet time sink), I came across this summary of Collins contracts for
> the US Navy. Shows quantities for some of our old friends like URC-32,
> R-388, ARR-41, ARC-38, PRC-47, TRC-75, and KWM-2
> (and what are 522-1298-00 transceivers?)
> https://www.navy-radio.com/misc/collins-navy-1956.pdf
>
> Nick England K4NYW
> www.navy-radio.com
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From navy.radio at gmail.com  Mon Oct  9 12:36:15 2023
From: navy.radio at gmail.com (Nick England)
Date: Mon, 9 Oct 2023 12:36:15 -0400
Subject: [Milsurplus] FWIW - Navy contracts with Collins 1956-62
In-Reply-To: <CAGRTi8VY1peUUo=YbZUp8nRUGVpV4460Nb2NqkeRNMzF8+GkEg@mail.gmail.com>
References: <CAB55hNc5yZzrhAoYEB7Tm-xD48hdTrRZtePpmxOCYFBVHfW7xA@mail.gmail.com>
	<CAGRTi8VY1peUUo=YbZUp8nRUGVpV4460Nb2NqkeRNMzF8+GkEg@mail.gmail.com>
Message-ID: <CAB55hNcrX3eknSMfj86AKuX87zHSh_PcUbh9uEFbD_opeDOeYQ@mail.gmail.com>

Collins definitely made the receivers. Hallicrafters had two contracts to
supply them along with the CY-1260/G cabinets. This cabinet worked with
R-388?s that had little roller wheels at the rear corners. Hallicrafters
made the cabinets. I don?t know whether the roller wheels were added by
Collins or Hallicrafters.
Photos and contract numbers are at
https://www.navy-radio.com/rcvrs/r388.htm

Additions and corrections welcomed.
Nick K4NYW

On Mon, Oct 9, 2023 at 11:56 AM Dave Merrill <r390a.urr at gmail.com> wrote:

> I have an "INSTRUCTION BOOK FOR RADIO RECEIVER R-388/URR" dated 5
> September 1951 which states "Manufactured by The Hallicrafters Company
> Chicago, Illinois Order Number 3357-Phila-52"
>
> This looks just like the Collins version of the manual, enameled paper,
> same typeface, manila covers, etc.
>
> So do you suppose this was one of those deals where a second source was
> required and Collins either shipped complete or incomplete units at
> wholesale to Hallicrafters for final assembly and delivery? I'm sure
> Hallicrafters was more than capable to make them from scratch but setting
> up the tooling, procurement, assembly line, quality control plus everything
> else would have been expensive.
>
> Apparently they exist because one is on Etsy.
>
> Dave N9ZC
>
> On Sun, Oct 8, 2023, 4:24 PM Nick England <navy.radio at gmail.com> wrote:
>
>> Reading a congressional hearing on sole source procurement (yet another
>> internet time sink), I came across this summary of Collins contracts for
>> the US Navy. Shows quantities for some of our old friends like URC-32,
>> R-388, ARR-41, ARC-38, PRC-47, TRC-75, and KWM-2
>> (and what are 522-1298-00 transceivers?)
>> https://www.navy-radio.com/misc/collins-navy-1956.pdf
>>
>> Nick England K4NYW
>> www.navy-radio.com
>>
> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From mjcal77 at yahoo.com  Mon Oct  9 13:40:42 2023
From: mjcal77 at yahoo.com (CL in NC)
Date: Mon, 9 Oct 2023 17:40:42 +0000 (UTC)
Subject: [Milsurplus] Interesting dynamotor fact
References: <1395632306.6880119.1696873242755.ref@mail.yahoo.com>
Message-ID: <1395632306.6880119.1696873242755@mail.yahoo.com>

The fellow based in Atlanta that refurbishes WW II aircraft electric turrets, known as "The Turret Guy", has to also rebuild the amplidynes that make the power to run them.  We were talking brushes and I asked him where he was buying his.  But, he said that the amplidynes and dynamotors that run at ground level, last almost indefinitely compared to those that actually ran at 20-30,000 feet in their heyday.  Guessing the lower air pressure at altitude promotes more arcing and burns them up quicker.  He mentioned he had one turret he uses for demos he put brushes in many years ago and they still look almost brand new, after countless shows and demonstrations.

Charlie, W4MEC in NC

From scr274 at gmail.com  Mon Oct  9 14:35:21 2023
From: scr274 at gmail.com (Ken Kinderman)
Date: Mon, 9 Oct 2023 14:35:21 -0400
Subject: [Milsurplus] Recognize this Dynamotor?
In-Reply-To: <CAGRTi8Wb3Uo6s1qVKCWqO47wpmbmMkpzeQo_qRx=8EBSB3XuMw@mail.gmail.com>
References: <CAGRTi8Wb3Uo6s1qVKCWqO47wpmbmMkpzeQo_qRx=8EBSB3XuMw@mail.gmail.com>
Message-ID: <6F86F145-6421-4C54-A964-23FE4E85518B@gmail.com>

Could be for the ARB

> On Oct 9, 2023, at 10:44 AM, Dave Merrill <r390a.urr at gmail.com> wrote:
> 
> ?
> Any clue where was it used? Same dimensions as a DM-32.
> 
> Dave N9ZC 
> <IMG_20231009_082557061~2.jpg>
> <IMG_20231009_082720298~2.jpg>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From old_radio at aol.com  Mon Oct  9 14:44:55 2023
From: old_radio at aol.com (Jim Whartenby)
Date: Mon, 9 Oct 2023 18:44:55 +0000 (UTC)
Subject: [Milsurplus] Interesting dynamotor fact
In-Reply-To: <1395632306.6880119.1696873242755@mail.yahoo.com>
References: <1395632306.6880119.1696873242755.ref@mail.yahoo.com>
	<1395632306.6880119.1696873242755@mail.yahoo.com>
Message-ID: <1811266375.13255082.1696877095231@mail.yahoo.com>

Charlie, your guess is confirmed, see:http://catalog.teledynereynolds.com/Asset/1431.html#:~:text=At%20sea%20level%2C%20about%2030%2C000,will%20arc%20across%20the%20electrodes.

Wonder if a capacitor across the brushes would reduce the spark?? Works for point ignition systems.Regards,Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy 

    On Monday, October 9, 2023 at 12:41:48 PM CDT, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:  
 
 The fellow based in Atlanta that refurbishes WW II aircraft electric turrets, known as "The Turret Guy", has to also rebuild the amplidynes that make the power to run them.? We were talking brushes and I asked him where he was buying his.? But, he said that the amplidynes and dynamotors that run at ground level, last almost indefinitely compared to those that actually ran at 20-30,000 feet in their heyday.? Guessing the lower air pressure at altitude promotes more arcing and burns them up quicker.? He mentioned he had one turret he uses for demos he put brushes in many years ago and they still look almost brand new, after countless shows and demonstrations.

Charlie, W4MEC in NC
______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
  
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From r390a.urr at gmail.com  Mon Oct  9 15:32:35 2023
From: r390a.urr at gmail.com (Dave Merrill)
Date: Mon, 9 Oct 2023 14:32:35 -0500
Subject: [Milsurplus] Recognize this Dynamotor?
In-Reply-To: <6F86F145-6421-4C54-A964-23FE4E85518B@gmail.com>
References: <CAGRTi8Wb3Uo6s1qVKCWqO47wpmbmMkpzeQo_qRx=8EBSB3XuMw@mail.gmail.com>
	<6F86F145-6421-4C54-A964-23FE4E85518B@gmail.com>
Message-ID: <CAGRTi8W-7nesjABk1TmU1_z05cFndMufQRzqN+Y7JBPCR+b+hw@mail.gmail.com>

Just went through the ARB manual and - BINGO!

Thanks, Ken.

On Mon, Oct 9, 2023 at 1:35?PM Ken Kinderman <scr274 at gmail.com> wrote:

> Could be for the ARB
>
> > On Oct 9, 2023, at 10:44 AM, Dave Merrill <r390a.urr at gmail.com> wrote:
> >
> > ?
> > Any clue where was it used? Same dimensions as a DM-32.
> >
> > Dave N9ZC
> > <IMG_20231009_082557061~2.jpg>
> > <IMG_20231009_082720298~2.jpg>
> > ______________________________________________________________
> > Milsurplus mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Milsurplus at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
>
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From Kargo_cult at msn.com  Mon Oct  9 16:27:15 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 9 Oct 2023 20:27:15 +0000
Subject: [Milsurplus] Japanese Morse Code Trainer
Message-ID: <CO6PR19MB54340621D6F4B6E918C9D181E4CEA@CO6PR19MB5434.namprd19.prod.outlook.com>

Here is a Japanese 1943 built 'Morse code trainer'. The chrome wheel has bumps and flats which are read out by the flexible metal arm switch.
It looks to me like tube #12 in the schematic is just a "noise generator", like the contacts that feed its grid "drag" on the chrome wheel. That's
my guess. Tube #1 is the tone generator which goes right to the output transformer. The two tube plates are paralleled. Some years back i
transcribed the characters sent. Some are uniquely Japanese not used elsewhere in the world. I only have the one chrome code wheel which is
frozen on the axle anyway. A clockwork spring inside, cranked up, plays it for a few minutes.
-Hue Miller
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From scr274 at gmail.com  Mon Oct  9 17:00:40 2023
From: scr274 at gmail.com (Ken Kinderman)
Date: Mon, 9 Oct 2023 17:00:40 -0400
Subject: [Milsurplus] Recognize this Dynamotor?
In-Reply-To: <CAGRTi8W-7nesjABk1TmU1_z05cFndMufQRzqN+Y7JBPCR+b+hw@mail.gmail.com>
References: <CAGRTi8W-7nesjABk1TmU1_z05cFndMufQRzqN+Y7JBPCR+b+hw@mail.gmail.com>
Message-ID: <EB3DD678-469E-461C-8594-314B5E7FA742@gmail.com>

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From scr274 at gmail.com  Mon Oct  9 17:12:58 2023
From: scr274 at gmail.com (Ken Kinderman)
Date: Mon, 9 Oct 2023 17:12:58 -0400
Subject: [Milsurplus] Interesting dynamotor fact
In-Reply-To: <1811266375.13255082.1696877095231@mail.yahoo.com>
References: <1811266375.13255082.1696877095231@mail.yahoo.com>
Message-ID: <5B1B8416-6FC3-4FF8-9B59-73FB47DAE5DE@gmail.com>

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From boeing377 at gmail.com  Mon Oct  9 19:07:31 2023
From: boeing377 at gmail.com (boeing377 at gmail.com)
Date: Mon, 9 Oct 2023 16:07:31 -0700
Subject: [Milsurplus] Interesting dynamotor fact
In-Reply-To: <5B1B8416-6FC3-4FF8-9B59-73FB47DAE5DE@gmail.com>
References: <1811266375.13255082.1696877095231@mail.yahoo.com>
	<5B1B8416-6FC3-4FF8-9B59-73FB47DAE5DE@gmail.com>
Message-ID: <CAFZq+Ez2vkQuZOY+Zkgh9ydh=a8BEYBzZpgB+CGrHC-KwKigSA@mail.gmail.com>

ARC 21 and ARC 65 solved the problem by having a pressurized container for
the radios.

On Mon, Oct 9, 2023 at 2:13 PM Ken Kinderman <scr274 at gmail.com> wrote:

> I wonder if any other WW2 equipment solved that problem like the ART-13
> with the air pressure-sensitive switch that reduced the HV above a certain
> altitude. Ten thousand feet? (I think the manual may mention the altitude)
>
> 73,
>
> Ken
> W2EWL
>
> On Oct 9, 2023, at 2:45 PM, Jim Whartenby via Milsurplus <
> milsurplus at mailman.qth.net> wrote:
>
> ?
>
> Charlie, your guess is confirmed, see:
>
> http://catalog.teledynereynolds.com/Asset/1431.html#:~:text=At%20sea%20level%2C%20about%2030%2C000,will%20arc%20across%20the%20electrodes.
>
> Wonder if a capacitor across the brushes would reduce the spark?  Works
> for point ignition systems.
> Regards,
> Jim
>
> Logic: Method used to arrive at the wrong conclusion, with confidence.
> Murphy
>
>
> On Monday, October 9, 2023 at 12:41:48 PM CDT, CL in NC via Milsurplus <
> milsurplus at mailman.qth.net> wrote:
>
>
> The fellow based in Atlanta that refurbishes WW II aircraft electric
> turrets, known as "The Turret Guy", has to also rebuild the amplidynes that
> make the power to run them.  We were talking brushes and I asked him where
> he was buying his.  But, he said that the amplidynes and dynamotors that
> run at ground level, last almost indefinitely compared to those that
> actually ran at 20-30,000 feet in their heyday.  Guessing the lower air
> pressure at altitude promotes more arcing and burns them up quicker.  He
> mentioned he had one turret he uses for demos he put brushes in many years
> ago and they still look almost brand new, after countless shows and
> demonstrations.
>
> Charlie, W4MEC in NC
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From kb8tq at n1k.org  Mon Oct  9 19:19:42 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Mon, 9 Oct 2023 19:19:42 -0400
Subject: [Milsurplus] Interesting dynamotor fact
In-Reply-To: <CAFZq+Ez2vkQuZOY+Zkgh9ydh=a8BEYBzZpgB+CGrHC-KwKigSA@mail.gmail.com>
References: <1811266375.13255082.1696877095231@mail.yahoo.com>
	<5B1B8416-6FC3-4FF8-9B59-73FB47DAE5DE@gmail.com>
	<CAFZq+Ez2vkQuZOY+Zkgh9ydh=a8BEYBzZpgB+CGrHC-KwKigSA@mail.gmail.com>
Message-ID: <E3E315FB-0F19-4DB9-A4AB-A9D8A4CDE81C@n1k.org>

Hi

The ?pressurized container? approach lived on for a very long time after that ??

Bob

> On Oct 9, 2023, at 7:07?PM, boeing377 at gmail.com wrote:
> 
> ARC 21 and ARC 65 solved the problem by having a pressurized container for the radios. 
> 
> On Mon, Oct 9, 2023 at 2:13 PM Ken Kinderman <scr274 at gmail.com <mailto:scr274 at gmail.com>> wrote:
>> I wonder if any other WW2 equipment solved that problem like the ART-13 with the air pressure-sensitive switch that reduced the HV above a certain altitude. Ten thousand feet? (I think the manual may mention the altitude)
>> 
>> 73,
>> 
>> Ken
>> W2EWL
>> 
>>> On Oct 9, 2023, at 2:45 PM, Jim Whartenby via Milsurplus <milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net>> wrote:
>>> 
>>> ?
>> 
>>> Charlie, your guess is confirmed, see:
>>> http://catalog.teledynereynolds.com/Asset/1431.html#:~:text=At%20sea%20level%2C%20about%2030%2C000,will%20arc%20across%20the%20electrodes.
>>> 
>>> Wonder if a capacitor across the brushes would reduce the spark?  Works for point ignition systems.
>>> Regards,
>>> Jim
>>> 
>>> Logic: Method used to arrive at the wrong conclusion, with confidence.  Murphy
>>> 
>>> 
>>> On Monday, October 9, 2023 at 12:41:48 PM CDT, CL in NC via Milsurplus <milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net>> wrote:
>>> 
>>> 
>>> The fellow based in Atlanta that refurbishes WW II aircraft electric turrets, known as "The Turret Guy", has to also rebuild the amplidynes that make the power to run them.  We were talking brushes and I asked him where he was buying his.  But, he said that the amplidynes and dynamotors that run at ground level, last almost indefinitely compared to those that actually ran at 20-30,000 feet in their heyday.  Guessing the lower air pressure at altitude promotes more arcing and burns them up quicker.  He mentioned he had one turret he uses for demos he put brushes in many years ago and they still look almost brand new, after countless shows and demonstrations.
>>> 
>>> Charlie, W4MEC in NC
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net <mailto:Milsurplus at mailman.qth.net>
>>> 
>>> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
>>> Please help support this email list: http://www.qsl.net/donate.html
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>>> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
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>> 
>> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
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From lbfulton at windstream.net  Mon Oct  9 20:24:56 2023
From: lbfulton at windstream.net (lbfulton at windstream.net)
Date: Mon, 9 Oct 2023 20:24:56 -0400 (EDT)
Subject: [Milsurplus] Arcing dynamotor brushes.
In-Reply-To: <mailman.6414.1696883244.25502.milsurplus@mailman.qth.net>
References: <mailman.6414.1696883244.25502.milsurplus@mailman.qth.net>
Message-ID: <2051435930.32755605.1696897496119.JavaMail.zimbra@windstream.net>


The 490T-1 HF antenna coupler for the ARC-94 HF transceiver was pressurized to 5 psi to prevent arc over at altitude. Worked on them years ago in the mil. Don't know if it would work with a dynamotor though.

Garrett
----- Original Message -----
From: milsurplus-request at mailman.qth.net
To: milsurplus at mailman.qth.net
Sent: Monday, October 9, 2023 4:27:24 PM
Subject: Milsurplus Digest, Vol 234, Issue 10

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	milsurplus at mailman.qth.net

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Today's Topics:

   1. Re: Recognize this Dynamotor? (Ken Kinderman)
   2. Re: Interesting dynamotor fact (Jim Whartenby)
   3. Re: Recognize this Dynamotor? (Dave Merrill)
   4. Japanese Morse Code Trainer (Hubert Miller)


----------------------------------------------------------------------

Message: 1
Date: Mon, 9 Oct 2023 14:35:21 -0400
From: Ken Kinderman <scr274 at gmail.com>
To: Dave Merrill <r390a.urr at gmail.com>
Cc: Military Surplus net List <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] Recognize this Dynamotor?
Message-ID: <6F86F145-6421-4C54-A964-23FE4E85518B at gmail.com>
Content-Type: text/plain; charset=utf-8

Could be for the ARB

> On Oct 9, 2023, at 10:44 AM, Dave Merrill <r390a.urr at gmail.com> wrote:
> 
> ?
> Any clue where was it used? Same dimensions as a DM-32.
> 
> Dave N9ZC 
> <IMG_20231009_082557061~2.jpg>
> <IMG_20231009_082720298~2.jpg>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


------------------------------

Message: 2
Date: Mon, 9 Oct 2023 18:44:55 +0000 (UTC)
From: Jim Whartenby <old_radio at aol.com>
To: Milsurplus <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] Interesting dynamotor fact
Message-ID: <1811266375.13255082.1696877095231 at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"

Charlie, your guess is confirmed, see:http://catalog.teledynereynolds.com/Asset/1431.html#:~:text=At%20sea%20level%2C%20about%2030%2C000,will%20arc%20across%20the%20electrodes.

Wonder if a capacitor across the brushes would reduce the spark?? Works for point ignition systems.Regards,Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy 

    On Monday, October 9, 2023 at 12:41:48 PM CDT, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:  
 
 The fellow based in Atlanta that refurbishes WW II aircraft electric turrets, known as "The Turret Guy", has to also rebuild the amplidynes that make the power to run them.? We were talking brushes and I asked him where he was buying his.? But, he said that the amplidynes and dynamotors that run at ground level, last almost indefinitely compared to those that actually ran at 20-30,000 feet in their heyday.? Guessing the lower air pressure at altitude promotes more arcing and burns them up quicker.? He mentioned he had one turret he uses for demos he put brushes in many years ago and they still look almost brand new, after countless shows and demonstrations.

Charlie, W4MEC in NC
______________________________________________________________
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------------------------------

Message: 3
Date: Mon, 9 Oct 2023 14:32:35 -0500
From: Dave Merrill <r390a.urr at gmail.com>
To: Ken Kinderman <scr274 at gmail.com>
Cc: Military Surplus net List <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] Recognize this Dynamotor?
Message-ID:
	<CAGRTi8W-7nesjABk1TmU1_z05cFndMufQRzqN+Y7JBPCR+b+hw at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Just went through the ARB manual and - BINGO!

Thanks, Ken.

On Mon, Oct 9, 2023 at 1:35?PM Ken Kinderman <scr274 at gmail.com> wrote:

> Could be for the ARB
>
> > On Oct 9, 2023, at 10:44 AM, Dave Merrill <r390a.urr at gmail.com> wrote:
> >
> > ?
> > Any clue where was it used? Same dimensions as a DM-32.
> >
> > Dave N9ZC
> > <IMG_20231009_082557061~2.jpg>
> > <IMG_20231009_082720298~2.jpg>
> > ______________________________________________________________
> > Milsurplus mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Milsurplus at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
>
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------------------------------

Message: 4
Date: Mon, 9 Oct 2023 20:27:15 +0000
From: Hubert Miller <Kargo_cult at msn.com>
To: "milsurplus at mailman.qth.net" <milsurplus at mailman.qth.net>
Subject: [Milsurplus] Japanese Morse Code Trainer
Message-ID:
	<CO6PR19MB54340621D6F4B6E918C9D181E4CEA at CO6PR19MB5434.namprd19.prod.outlook.com>
	
Content-Type: text/plain; charset="us-ascii"

Here is a Japanese 1943 built 'Morse code trainer'. The chrome wheel has bumps and flats which are read out by the flexible metal arm switch.
It looks to me like tube #12 in the schematic is just a "noise generator", like the contacts that feed its grid "drag" on the chrome wheel. That's
my guess. Tube #1 is the tone generator which goes right to the output transformer. The two tube plates are paralleled. Some years back i
transcribed the characters sent. Some are uniquely Japanese not used elsewhere in the world. I only have the one chrome code wheel which is
frozen on the axle anyway. A clockwork spring inside, cranked up, plays it for a few minutes.
-Hue Miller
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------------------------------

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Help: http://mailman.qth.net/mmfaq.htm
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End of Milsurplus Digest, Vol 234, Issue 10
*******************************************

From old_radio at aol.com  Mon Oct  9 21:53:46 2023
From: old_radio at aol.com (Jim Whartenby)
Date: Tue, 10 Oct 2023 01:53:46 +0000 (UTC)
Subject: [Milsurplus] Interesting dynamotor fact
In-Reply-To: <CAFZq+Ez2vkQuZOY+Zkgh9ydh=a8BEYBzZpgB+CGrHC-KwKigSA@mail.gmail.com>
References: <1811266375.13255082.1696877095231@mail.yahoo.com>
	<5B1B8416-6FC3-4FF8-9B59-73FB47DAE5DE@gmail.com>
	<CAFZq+Ez2vkQuZOY+Zkgh9ydh=a8BEYBzZpgB+CGrHC-KwKigSA@mail.gmail.com>
Message-ID: <1633062727.4184775.1696902826639@mail.yahoo.com>

The ARC-27 is contemporary with the ARC-21, both were pressurized and appear to have been designed with the B-47 in mind.? They were located in the same compartment in the aft section of the bomber.? Since the B-47 did not have fuel tanks in the wings (too thin) every conceivable space in the fuselage was for fuel except for the crew area and the bomb bay.? See enclosed.Regards,Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy 

    On Monday, October 9, 2023 at 06:07:43 PM CDT, boeing377 at gmail.com <boeing377 at gmail.com> wrote:  
 
 ARC 21 and ARC 65 solved the problem by having a pressurized container for the radios.?
On Mon, Oct 9, 2023 at 2:13 PM Ken Kinderman <scr274 at gmail.com> wrote:

I wonder if any other WW2 equipment solved that problem like the ART-13 with the air pressure-sensitive switch that reduced the HV above a certain altitude. Ten thousand feet? (I think the manual may mention the altitude)
73,
KenW2EWL

On Oct 9, 2023, at 2:45 PM, Jim Whartenby via Milsurplus <milsurplus at mailman.qth.net> wrote:



?

Charlie, your guess is confirmed, see:http://catalog.teledynereynolds.com/Asset/1431.html#:~:text=At%20sea%20level%2C%20about%2030%2C000,will%20arc%20across%20the%20electrodes.

Wonder if a capacitor across the brushes would reduce the spark?? Works for point ignition systems.Regards,Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy 

    On Monday, October 9, 2023 at 12:41:48 PM CDT, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:  
 
 The fellow based in Atlanta that refurbishes WW II aircraft electric turrets, known as "The Turret Guy", has to also rebuild the amplidynes that make the power to run them.? We were talking brushes and I asked him where he was buying his.? But, he said that the amplidynes and dynamotors that run at ground level, last almost indefinitely compared to those that actually ran at 20-30,000 feet in their heyday.? Guessing the lower air pressure at altitude promotes more arcing and burns them up quicker.? He mentioned he had one turret he uses for demos he put brushes in many years ago and they still look almost brand new, after countless shows and demonstrations.

Charlie, W4MEC in NC
______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
  ______________________________________________________________
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From scr274 at gmail.com  Tue Oct 10 11:27:12 2023
From: scr274 at gmail.com (Ken Kinderman)
Date: Tue, 10 Oct 2023 11:27:12 -0400
Subject: [Milsurplus] 400 Hz Inverter
Message-ID: <CAKUjTOaWSY4fkTZnnubvy0YVv-AeKiqGU_D123RK=E64=2rc5g@mail.gmail.com>

This is a re-post... my original pix were too large

400 HZ Inverter 28 VDC in, 115 AC out, 50 VA

It works.

Yours for the cost of shipping

[image: inv 1.jpeg]




[image: IMG_0851 (1).jpeg]


73,
Ken
W2EWL
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From mjcal77 at yahoo.com  Tue Oct 10 15:25:30 2023
From: mjcal77 at yahoo.com (CL in NC)
Date: Tue, 10 Oct 2023 19:25:30 +0000 (UTC)
Subject: [Milsurplus] ARC 27 and dynamotor
References: <1478791219.4431466.1696965930887.ref@mail.yahoo.com>
Message-ID: <1478791219.4431466.1696965930887@mail.yahoo.com>

I worked on the ARC 27 many years ago, and always wondered how well the plenum chamber cover transferred the heat from inside to outside.  They did get pretty warm inside that sealed box.   There was a little dinky fan inside the unit to circulate the hot air, with  a dual squirrel cage blower for the plenum on the outside.  There was one installation called the 'biscuit' because it was round and flat, that had a 27 out of its cabinet and installed in the open, along with several other pieces of gear, but the whole biscuit was in a pressurized compartment and designed to be a change out item to expedite air craft turnaround.  I have forgotten the aircraft it went in, perhaps an S2F.

Charlie, W4MEC in NC

From Foltarz at rocketmail.com  Tue Oct 10 16:00:18 2023
From: Foltarz at rocketmail.com (Mark Foltarz)
Date: Tue, 10 Oct 2023 20:00:18 +0000 (UTC)
Subject: [Milsurplus] Bird Termaline oil
In-Reply-To: <1478791219.4431466.1696965930887@mail.yahoo.com>
References: <1478791219.4431466.1696965930887.ref@mail.yahoo.com>
	<1478791219.4431466.1696965930887@mail.yahoo.com>
Message-ID: <493287113.13845599.1696968018791@mail.yahoo.com>

 I am cleaning up a Bird Termaline 8890 in preparation for working on my GPT 10K and I realize it most likely needs some oil.I reach out to Bird and ask for? a modern equivalent to the part # indicated in the manualThey cheerfully send me to a link (?Bird RPK8890-3, Coolant Kit | Bird RF Online Store (btgstore.com) )? for the oil.The kit only costs $1300 for 3 gallons of oil - and a gasket.I couldn't believe it.?Anyone have any advice about a lower cost replacement for the oil ?I was thinking of using the MFJ transformer oil for loads.
tnxde WA4AMMark



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From n9vmo1 at gmail.com  Tue Oct 10 16:07:37 2023
From: n9vmo1 at gmail.com (Joe Montano)
Date: Tue, 10 Oct 2023 16:07:37 -0400
Subject: [Milsurplus] Bird Termaline oil
In-Reply-To: <493287113.13845599.1696968018791@mail.yahoo.com>
References: <1478791219.4431466.1696965930887.ref@mail.yahoo.com>
	<1478791219.4431466.1696965930887@mail.yahoo.com>
	<493287113.13845599.1696968018791@mail.yahoo.com>
Message-ID: <CAFaeFpEXcz0traEsoB7Gt5=OQ37mG1LFDZqosX6HhJ_Ascs39A@mail.gmail.com>

Back in the dark ages when I was a kid (40+ years ago), my dad built a
Heathkit Cantenna and instead of using transformer oil, he substituted
plain old mineral oil.  It was cheaper and didn't contain those dreaded
PCBs.

Every so often I replace what has leaked out over the years and it is still
working.

On Tue, Oct 10, 2023 at 4:00?PM Mark Foltarz via Milsurplus <
milsurplus at mailman.qth.net> wrote:

> I am cleaning up a Bird Termaline 8890 in preparation for working on my
> GPT 10K and I realize it most likely needs some oil.
> I reach out to Bird and ask for  a modern equivalent to the part #
> indicated in the manual
> They cheerfully send me to a link ( Bird RPK8890-3, Coolant Kit | Bird RF
> Online Store (btgstore.com) <https://btgstore.com/rpcokit3.html> )  for
> the oil.
> The kit only costs $1300 for 3 gallons of oil - and a gasket.
> I couldn't believe it.
> Anyone have any advice about a lower cost replacement for the oil ?
> I was thinking of using the MFJ transformer oil for loads.
>
> tnx
> de WA4AM
> Mark
>
>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html



-- 
Joe Montano
N9VMO
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From navy.radio at gmail.com  Tue Oct 10 16:10:25 2023
From: navy.radio at gmail.com (Nick England)
Date: Tue, 10 Oct 2023 16:10:25 -0400
Subject: [Milsurplus] FWIW - AN/PRC-47 procurement
Message-ID: <CAB55hNc_wi43MdkO=mSe1N7jMn+YsFFE1TZpVNjihSQVWcBHpA@mail.gmail.com>

I have no idea how to find out all the contracts for any particular piece
of equipment, but sometimes info will show up in the Congressional Record -
usually when some congress-critter is defending some company within his
district or hot on the trail of waste.....

Info from 1964 regarding PRC-47 contracts, including the Bendix bid.
https://www.navy-radio.com/misc/prc47-CRECB-1964-pt18-1-2.pdf

and from 1977
The Marine Corps is replacing 1834 obsolescent AN/PRC-47 radios with
AN/PRC-104's

Cheers,
Nick England K4NYW
www.navy-radio.com
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From patracy at gmail.com  Tue Oct 10 16:12:46 2023
From: patracy at gmail.com (Andrew)
Date: Tue, 10 Oct 2023 16:12:46 -0400
Subject: [Milsurplus] Bird Termaline oil
In-Reply-To: <493287113.13845599.1696968018791@mail.yahoo.com>
References: <1478791219.4431466.1696965930887.ref@mail.yahoo.com>
	<1478791219.4431466.1696965930887@mail.yahoo.com>
	<493287113.13845599.1696968018791@mail.yahoo.com>
Message-ID: <CAFtwaWZBKefkt1j7nkmXtR-Zwix-kJWLwZpuGEmX1evXEOc=FQ@mail.gmail.com>

Mark, you can use plain mineral oil.  I have a lot of transformer oil here
on hand if you'd rather have "official" oil.  But it'd probably just be as
cheap to go to your local farmer supply store and buy it.  (They sell by
the gallon for horses)

Thanks,
Andrew

KX4DV

On Tue, Oct 10, 2023 at 4:00?PM Mark Foltarz via Milsurplus <
milsurplus at mailman.qth.net> wrote:

> I am cleaning up a Bird Termaline 8890 in preparation for working on my
> GPT 10K and I realize it most likely needs some oil.
> I reach out to Bird and ask for  a modern equivalent to the part #
> indicated in the manual
> They cheerfully send me to a link ( Bird RPK8890-3, Coolant Kit | Bird RF
> Online Store (btgstore.com) <https://btgstore.com/rpcokit3.html> )  for
> the oil.
> The kit only costs $1300 for 3 gallons of oil - and a gasket.
> I couldn't believe it.
> Anyone have any advice about a lower cost replacement for the oil ?
> I was thinking of using the MFJ transformer oil for loads.
>
> tnx
> de WA4AM
> Mark
>
>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From old_radio at aol.com  Tue Oct 10 16:19:11 2023
From: old_radio at aol.com (Jim Whartenby)
Date: Tue, 10 Oct 2023 20:19:11 +0000 (UTC)
Subject: [Milsurplus] ARC 27 and dynamotor
In-Reply-To: <1478791219.4431466.1696965930887@mail.yahoo.com>
References: <1478791219.4431466.1696965930887.ref@mail.yahoo.com>
	<1478791219.4431466.1696965930887@mail.yahoo.com>
Message-ID: <1692465537.13839368.1696969151948@mail.yahoo.com>

CharlieI was in the USAF from 67 to 72.? My training was in Ground Radio but if no other group on base had maintenance responsibility, Ground Radio got the task.? So we worked on the old ARC-3 and ARC-27 radios.? Both were in the MPN-13 RAPCON van when I was stationed at Mactan, AB, RPI.? There was also a GRC-32 at the control tower which is an ARC-27 and a big whopping power supply to produce the 27 VDC.
The MPN-13 was heavily air conditioned so both the ARC-3 and ARC-27 radios were pretty reliable.? The GRC-32 was run outside of it's case because of the heat.? IIRC it was used as a backup radio anyway and usually maintained by the Philippine Air Force.? There were also several TRC-68, aka GRA-53 or 54 type radios.? These are similar to the VRC-24 but have an AC line power supply in the same cabinet which also had a built in blower assembly.??
These radios really got hot during operation in the PI.? At times, they were so hot that one could not lift or carry the R/T unit back to the shop until they were out of the case for perhaps half an hour or so?to cool down.Fun times,Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy 

    On Tuesday, October 10, 2023 at 02:26:13 PM CDT, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:  
 
 I worked on the ARC 27 many years ago, and always wondered how well the plenum chamber cover transferred the heat from inside to outside.? They did get pretty warm inside that sealed box.? There was a little dinky fan inside the unit to circulate the hot air, with? a dual squirrel cage blower for the plenum on the outside.? There was one installation called the 'biscuit' because it was round and flat, that had a 27 out of its cabinet and installed in the open, along with several other pieces of gear, but the whole biscuit was in a pressurized compartment and designed to be a change out item to expedite air craft turnaround.? I have forgotten the aircraft it went in, perhaps an S2F.

Charlie, W4MEC in NC
______________________________________________________________
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Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
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From n4fs at eozinc.com  Tue Oct 10 16:39:41 2023
From: n4fs at eozinc.com (Mike Feher)
Date: Tue, 10 Oct 2023 16:39:41 -0400
Subject: [Milsurplus] Bird Termaline oil
In-Reply-To: <CAFtwaWZBKefkt1j7nkmXtR-Zwix-kJWLwZpuGEmX1evXEOc=FQ@mail.gmail.com>
References: <1478791219.4431466.1696965930887.ref@mail.yahoo.com>	<1478791219.4431466.1696965930887@mail.yahoo.com>	<493287113.13845599.1696968018791@mail.yahoo.com>
	<CAFtwaWZBKefkt1j7nkmXtR-Zwix-kJWLwZpuGEmX1evXEOc=FQ@mail.gmail.com>
Message-ID: <078f01d9fbb9$e54e8470$afeb8d50$@eozinc.com>

I have successfully used power transformer oil from the local electric utility provider. I just went there with a couple of gallon jugs and they gladly filled them for me. No charge at all. 73 ? Mike 

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

848-245-9115

 

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Andrew
Sent: Tuesday, October 10, 2023 4:13 PM
To: Mark Foltarz <Foltarz at rocketmail.com>
Cc: Milsurplus <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] Bird Termaline oil

 

Mark, you can use plain mineral oil.  I have a lot of transformer oil here on hand if you'd rather have "official" oil.  But it'd probably just be as cheap to go to your local farmer supply store and buy it.  (They sell by the gallon for horses)

 

Thanks,

Andrew

KX4DV

 

On Tue, Oct 10, 2023 at 4:00?PM Mark Foltarz via Milsurplus <milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net> > wrote:

I am cleaning up a Bird Termaline 8890 in preparation for working on my GPT 10K and I realize it most likely needs some oil.

I reach out to Bird and ask for  a modern equivalent to the part # indicated in the manual

They cheerfully send me to a link (  <https://btgstore.com/rpcokit3.html> Bird RPK8890-3, Coolant Kit | Bird RF Online Store (btgstore.com) )  for the oil.

The kit only costs $1300 for 3 gallons of oil - and a gasket.

I couldn't believe it. 

Anyone have any advice about a lower cost replacement for the oil ?

I was thinking of using the MFJ transformer oil for loads.

 

tnx

de WA4AM

Mark

 

 

 

 

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Help: http://mailman.qth.net/mmfaq.htm
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From couryhouse at aol.com  Tue Oct 10 17:00:21 2023
From: couryhouse at aol.com (ED SHARPE)
Date: Tue, 10 Oct 2023 21:00:21 +0000 (UTC)
Subject: [Milsurplus] ARC 27 and dynamotor arc 3!
In-Reply-To: <1692465537.13839368.1696969151948@mail.yahoo.com>
References: <1478791219.4431466.1696965930887.ref@mail.yahoo.com>
	<1478791219.4431466.1696965930887@mail.yahoo.com>
	<1692465537.13839368.1696969151948@mail.yahoo.com>
Message-ID: <222123040.7355032.1696971622009@mail.yahoo.com>

At Luke AFB 71-73 we had arc 3? as vhf tower backup... HA!? it backed up a? bc-640 at tx site and bc-639 at rx site vhf unites? one set for tower vhf the other? for vhf? guard.? although I already knew how? to work on the arc 3 stuff? it? was taken care of by avionocs sq.? ?all we did was pull the units out to swap them.
Ed Sharpe archivist for SMECC? ? former 30454? USAF?wish i had? the? 640? tx? that was at? luke... Scot J? any idea who got that? drom DRMO?
In a message dated 10/10/2023 1:20:03 PM US Mountain Standard Time, milsurplus at mailman.qth.net writes:?
CharlieI was in the USAF from 67 to 72.? My training was in Ground Radio but if no other group on base had maintenance responsibility, Ground Radio got the task.? So we worked on the old ARC-3 and ARC-27 radios.? Both were in the MPN-13 RAPCON van when I was stationed at Mactan, AB, RPI.? There was also a GRC-32 at the control tower which is an ARC-27 and a big whopping power supply to produce the 27 VDC.?The MPN-13 was heavily air conditioned so both the ARC-3 and ARC-27 radios were pretty reliable.? The GRC-32 was run outside of it's case because of the heat.? IIRC it was used as a backup radio anyway and usually maintained by the Philippine Air Force.? There were also several TRC-68, aka GRA-53 or 54 type radios.? These are similar to the VRC-24 but have an AC line power supply in the same cabinet which also had a built in blower assembly.???These radios really got hot during operation in the PI.? At times, they were so hot that one could not lift or carry the R/T unit back to the shop until they were out of the case for perhaps half an hour or so?to cool down.Fun times,Jim?Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy??On Tuesday, October 10, 2023 at 02:26:13 PM CDT, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:??I worked on the ARC 27 many years ago, and always wondered how well the plenum chamber cover transferred the heat from inside to outside.? They did get pretty warm inside that sealed box.? There was a little dinky fan inside the unit to circulate the hot air, with? a dual squirrel cage blower for the plenum on the outside.? There was one installation called the 'biscuit' because it was round and flat, that had a 27 out of its cabinet and installed in the open, along with several other pieces of gear, but the whole biscuit was in a pressurized compartment and designed to be a change out item to expedite air craft turnaround.? I have forgotten the aircraft it went in, perhaps an S2F.?Charlie, W4MEC in NC______________________________________________________________Milsurplus mailing listHome: http://mailman.qth.net/mailman/listinfo/milsurplusHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Milsurplus at mailman.qth.net?This list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

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From n8kbc at cox.net  Tue Oct 10 17:38:30 2023
From: n8kbc at cox.net (N8KBC Dave)
Date: Tue, 10 Oct 2023 21:38:30 +0000
Subject: [Milsurplus] coolant for Bird load
Message-ID: <emfcc87ac7-5c39-4542-9558-2ff2a161e85b@def75846.com>

The coolant in the model 8890 is not mineral oil it is a silicone high 
temp oil.


-- 
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From w2hx at w2hx.com  Tue Oct 10 20:16:04 2023
From: w2hx at w2hx.com (W2HX)
Date: Wed, 11 Oct 2023 00:16:04 +0000
Subject: [Milsurplus] coolant for Bird load
In-Reply-To: <emfcc87ac7-5c39-4542-9558-2ff2a161e85b@def75846.com>
References: <emfcc87ac7-5c39-4542-9558-2ff2a161e85b@def75846.com>
Message-ID: <BL1PR12MB5269ACD49947E94DE4E0574DB5CCA@BL1PR12MB5269.namprd12.prod.outlook.com>

Is silicone high temp oil available from cheaper sources?


73 Eugene W2HX
Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of N8KBC Dave
Sent: Tuesday, October 10, 2023 5:39 PM
To: milsurplus at mailman.qth.net
Subject: [Milsurplus] coolant for Bird load

The coolant in the model 8890 is not mineral oil it is a silicone high temp oil.


[https://s-install.avcdn.net/ipm/preview/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif]<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
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From ka8wtk at gmail.com  Wed Oct 11 15:57:01 2023
From: ka8wtk at gmail.com (Bill)
Date: Wed, 11 Oct 2023 15:57:01 -0400
Subject: [Milsurplus] 70E-15 PTO
Message-ID: <650b3ccc-ea03-b0cb-cd05-364cbd75b830@gmail.com>

Hello,

 ? Attached is a photo of a 70E-15 that is in a R-388/51J radio I bought 
years ago and never really got around to working with until now. So far 
this appears to be a 51J-3,? except for this strange PTO.

 ? I know this is not the correct "looking" PTO for the radio, but I 
would like to know where it came from. In the ideal world I would get a 
more correct PTO for the radio and swap them out so someone who needs 
one like this could get it. Right now I just want to identify where on 
labeled like this came from.

Thanks,

 ??? ??? ??? Bill KA8WTK
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From old_radio at aol.com  Thu Oct 12 02:14:43 2023
From: old_radio at aol.com (Jim Whartenby)
Date: Thu, 12 Oct 2023 06:14:43 +0000 (UTC)
Subject: [Milsurplus] 70E-15 PTO
In-Reply-To: <650b3ccc-ea03-b0cb-cd05-364cbd75b830@gmail.com>
References: <650b3ccc-ea03-b0cb-cd05-364cbd75b830@gmail.com>
Message-ID: <1063380588.14600847.1697091283783@mail.yahoo.com>

According to?https://www.collinsradio.org/archives/various_articles/PTO_Specification_Data.pdfit is the correct PTO for the 51J series of radios.Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy 

    On Wednesday, October 11, 2023 at 05:47:58 PM CDT, Bill <ka8wtk at gmail.com> wrote:  
 
 Hello,

 ? Attached is a photo of a 70E-15 that is in a R-388/51J radio I bought 
years ago and never really got around to working with until now. So far 
this appears to be a 51J-3,? except for this strange PTO.

 ? I know this is not the correct "looking" PTO for the radio, but I 
would like to know where it came from. In the ideal world I would get a 
more correct PTO for the radio and swap them out so someone who needs 
one like this could get it. Right now I just want to identify where on 
labeled like this came from.

Thanks,

 ??? ??? ??? Bill KA8WTK
______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

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From talgarth at comcast.net  Thu Oct 12 12:52:43 2023
From: talgarth at comcast.net (Gary Hitchner)
Date: Thu, 12 Oct 2023 12:52:43 -0400
Subject: [Milsurplus] For Sale- 2)-  Harris amplifiers
Message-ID: <000201d9fd2c$858eb1d0$90ac1570$@comcast.net>

Military List,

For Sale, 2 Harris amplifiers, 

1)- RF-110A, with PS and interconnecting cable.

1)- RF-1110A, with PS no cables.

These are warehouse finds, have not been powered on for a long time.  They
do both appear to be complete.

$2300.00 for all 4 pieces, pickup near Valley Forge PA. 

Some pictures at:

https://www.qsl.net/wa2omy/Harris-amp-1.jpg

https://www.qsl.net/wa2omy/Harris-amp-2.jpg

https://www.qsl.net/wa2omy/Harris-amp-3.jpg

E-mail if interested,

Gary

WA2OMY

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From RAFANTINI at salisbury.edu  Fri Oct 13 15:00:04 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Fri, 13 Oct 2023 19:00:04 +0000
Subject: [Milsurplus] Tomorrow mornings nets
Message-ID: <DM8P220MB0472CD643DBFFCA1A11EAAB3B8D2A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Remember, tomorrow morning 0900 MMRCG RTTY Net, 7.087 850 Hz shift, 60 wpm (45.5 baud) 1000 MMRCG 7.296 USB Net and Moose & Squirrel Net at 1200, 5.357 USB All times EST or what ever we are in right now.
Be There or be Square!

Ray F/KA3EKH

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From arc5 at ix.netcom.com  Sat Oct 14 01:17:57 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sat, 14 Oct 2023 00:17:57 -0500
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
Message-ID: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>

Recently acquired this complete RAS receiver rack.
I've seen and have WWII-era U.S. Navy receivers
which were originally black wrinkle with the old
paint stripped, repainted with gray-to-blue-gray
untextured paint and with (if they are in
good condition) their nomenclature plates remounted.
This one has been stripped and professionally repainted,
but all the tags have been replaced with laminated paper.
Photos:

https://photos.app.goo.gl/EaaKdEHbp8TjbB6q6
https://photos.app.goo.gl/FqvN2dHAGfp3RtUG6
https://photos.app.goo.gl/tVGmeKfBXzo7v8Nc8
https://photos.app.goo.gl/LQnWky5njWgtvKtE7

Anyone seen this before?  What do you think?

TNX OM ES 73 DE Dave AB5S

-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com

From kb8tq at n1k.org  Sat Oct 14 09:06:08 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Sat, 14 Oct 2023 09:06:08 -0400
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
Message-ID: <E5F99A6B-B0F5-4EE3-AB59-875CDEF657F8@n1k.org>

Hi

Just a guess ?. while the labels seem to be nicely done, I don?t think they are ?Navy issue?.  They didn?t hold up very well on the shelf. In any real use situation they would not have lasted very long at all. 

Bob

> On Oct 14, 2023, at 1:17?AM, David Stinson <arc5 at ix.netcom.com> wrote:
> 
> Recently acquired this complete RAS receiver rack.
> I've seen and have WWII-era U.S. Navy receivers
> which were originally black wrinkle with the old
> paint stripped, repainted with gray-to-blue-gray
> untextured paint and with (if they are in
> good condition) their nomenclature plates remounted.
> This one has been stripped and professionally repainted,
> but all the tags have been replaced with laminated paper.
> Photos:
> 
> https://photos.app.goo.gl/EaaKdEHbp8TjbB6q6
> https://photos.app.goo.gl/FqvN2dHAGfp3RtUG6
> https://photos.app.goo.gl/tVGmeKfBXzo7v8Nc8
> https://photos.app.goo.gl/LQnWky5njWgtvKtE7
> 
> Anyone seen this before?  What do you think?
> 
> TNX OM ES 73 DE Dave AB5S
> 
> -- 
> This email has been checked for viruses by Avast antivirus software.
> www.avast.com
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


From navy.radio at gmail.com  Sat Oct 14 09:59:48 2023
From: navy.radio at gmail.com (Nick England)
Date: Sat, 14 Oct 2023 09:59:48 -0400
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <E5F99A6B-B0F5-4EE3-AB59-875CDEF657F8@n1k.org>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<E5F99A6B-B0F5-4EE3-AB59-875CDEF657F8@n1k.org>
Message-ID: <CAB55hNfA7eUWo96LnjivNdaXvk=1mOGdRhscd=BB31Y_iDvMUw@mail.gmail.com>

The Navy had a post-war program refurbishing gear at the shipyards, but
I?ve never seen paper labels from there. I dunno. Another boatanchor
mystery!!


On Sat, Oct 14, 2023 at 9:06 AM Bob Camp <kb8tq at n1k.org> wrote:

> Hi
>
> Just a guess ?. while the labels seem to be nicely done, I don?t think
> they are ?Navy issue?.  They didn?t hold up very well on the shelf. In any
> real use situation they would not have lasted very long at all.
>
> Bob
>
> > On Oct 14, 2023, at 1:17?AM, David Stinson <arc5 at ix.netcom.com> wrote:
> >
> > Recently acquired this complete RAS receiver rack.
> > I've seen and have WWII-era U.S. Navy receivers
> > which were originally black wrinkle with the old
> > paint stripped, repainted with gray-to-blue-gray
> > untextured paint and with (if they are in
> > good condition) their nomenclature plates remounted.
> > This one has been stripped and professionally repainted,
> > but all the tags have been replaced with laminated paper.
> > Photos:
> >
> > https://photos.app.goo.gl/EaaKdEHbp8TjbB6q6
> > https://photos.app.goo.gl/FqvN2dHAGfp3RtUG6
> > https://photos.app.goo.gl/tVGmeKfBXzo7v8Nc8
> > https://photos.app.goo.gl/LQnWky5njWgtvKtE7
> >
> > Anyone seen this before?  What do you think?
> >
> > TNX OM ES 73 DE Dave AB5S
> >
> > --
> > This email has been checked for viruses by Avast antivirus software.
> > www.avast.com
> > ______________________________________________________________
> > Milsurplus mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Milsurplus at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From pfthekan at gmail.com  Sat Oct 14 11:06:41 2023
From: pfthekan at gmail.com (Paul Thekan)
Date: Sat, 14 Oct 2023 08:06:41 -0700
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <CAB55hNfA7eUWo96LnjivNdaXvk=1mOGdRhscd=BB31Y_iDvMUw@mail.gmail.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<E5F99A6B-B0F5-4EE3-AB59-875CDEF657F8@n1k.org>
	<CAB55hNfA7eUWo96LnjivNdaXvk=1mOGdRhscd=BB31Y_iDvMUw@mail.gmail.com>
Message-ID: <CAK4LMKPMHO9B8kgvZe9y+DODSSD0QwCnGJtKc+6Z0h=jSAbkrw@mail.gmail.com>

Dave..never seen labels like this before. Maybe you can back track from
whom you got this RAS from. I'm guessing maybe some non mill radio type
restored - had repainted but didn't like the data plates or they were all
missing and then did his own including the ones he made for the controls
and the plug in coil. Did a very nice job of it.
Hope you can find the person who did this...and hopefully if they did
remove the data plates..still has them.

I have a post war repaint RAS with the orig tags...though they forgot to
put back the data plate on the pwr supply ..mine is missing.

Let us know if you find out the story about this RAS

Paul
N6FEG

On Sat, Oct 14, 2023, 7:00 AM Nick England <navy.radio at gmail.com> wrote:

> The Navy had a post-war program refurbishing gear at the shipyards, but
> I?ve never seen paper labels from there. I dunno. Another boatanchor
> mystery!!
>
>
> On Sat, Oct 14, 2023 at 9:06 AM Bob Camp <kb8tq at n1k.org> wrote:
>
>> Hi
>>
>> Just a guess ?. while the labels seem to be nicely done, I don?t think
>> they are ?Navy issue?.  They didn?t hold up very well on the shelf. In any
>> real use situation they would not have lasted very long at all.
>>
>> Bob
>>
>> > On Oct 14, 2023, at 1:17?AM, David Stinson <arc5 at ix.netcom.com> wrote:
>> >
>> > Recently acquired this complete RAS receiver rack.
>> > I've seen and have WWII-era U.S. Navy receivers
>> > which were originally black wrinkle with the old
>> > paint stripped, repainted with gray-to-blue-gray
>> > untextured paint and with (if they are in
>> > good condition) their nomenclature plates remounted.
>> > This one has been stripped and professionally repainted,
>> > but all the tags have been replaced with laminated paper.
>> > Photos:
>> >
>> > https://photos.app.goo.gl/EaaKdEHbp8TjbB6q6
>> > https://photos.app.goo.gl/FqvN2dHAGfp3RtUG6
>> > https://photos.app.goo.gl/tVGmeKfBXzo7v8Nc8
>> > https://photos.app.goo.gl/LQnWky5njWgtvKtE7
>> >
>> > Anyone seen this before?  What do you think?
>> >
>> > TNX OM ES 73 DE Dave AB5S
>> >
>> > --
>> > This email has been checked for viruses by Avast antivirus software.
>> > www.avast.com
>> > ______________________________________________________________
>> > Milsurplus mailing list
>> > Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> > Help: http://mailman.qth.net/mmfaq.htm
>> > Post: mailto:Milsurplus at mailman.qth.net
>> >
>> > This list hosted by: http://www.qsl.net
>> > Please help support this email list: http://www.qsl.net/donate.html
>>
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
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>> Please help support this email list: http://www.qsl.net/donate.html
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From arc5 at ix.netcom.com  Sat Oct 14 11:27:21 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sat, 14 Oct 2023 10:27:21 -0500
Subject: [Milsurplus] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
Message-ID: <f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>

Those who have worked on National RAS receivers:
As you probably know, the RAS was designed as a CW
receiver.  The RAS audio bandwidth drops off markedly
above about 800 Cycles.  Not good for AM or BCB monitoring.

Has anyone here found a non-destructive way to improve this?
The IFs are themselves narrow at 175 KC, so have thought of
placing resistors across those transformers to broaden them
somewhat.  Anyone worked this issue?

TNX OM DE Dave AB5S

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From mstangelo at comcast.net  Sat Oct 14 11:45:15 2023
From: mstangelo at comcast.net (mstangelo at comcast.net)
Date: Sat, 14 Oct 2023 11:45:15 -0400 (EDT)
Subject: [Milsurplus] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
Message-ID: <90211682.364652.1697298315820@connect.xfinity.com>

Is the bandwidth limit only in the IF filters or are there also filters in the AF stage?

Where can we find a schematic of the RAS receiver?

Mike N2MS

> On 10/14/2023 11:27 AM EDT David Stinson <arc5 at ix.netcom.com> wrote:
> 
>  
> Those who have worked on National RAS receivers:
> As you probably know, the RAS was designed as a CW
> receiver.  The RAS audio bandwidth drops off markedly
> above about 800 Cycles.  Not good for AM or BCB monitoring.
> 
> Has anyone here found a non-destructive way to improve this?
> The IFs are themselves narrow at 175 KC, so have thought of
> placing resistors across those transformers to broaden them
> somewhat.  Anyone worked this issue?
> 
> TNX OM DE Dave AB5S

From kargo_cult at msn.com  Sat Oct 14 12:26:32 2023
From: kargo_cult at msn.com (Hubert Miller)
Date: Sat, 14 Oct 2023 16:26:32 +0000
Subject: [Milsurplus] Navy RAS Receiver - Better Audio Fidelity?
Message-ID: <CO6PR19MB54347B4EBAD48BB8D2C752CDE4D1A@CO6PR19MB5434.namprd19.prod.outlook.com>

Hold off a bit on your conclusions about paper labels. This sounds familiar to me, maybe on an RBM power supply, but i can't quite remembet now. Re selectivity, i think i would rejoice over that fact, and just work on the audio channel.
-Hue Miller



Sent from my Verizon, Samsung Galaxy smartphone
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From kb8tq at n1k.org  Sat Oct 14 12:37:43 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Sat, 14 Oct 2023 12:37:43 -0400
Subject: [Milsurplus] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <CO6PR19MB54347B4EBAD48BB8D2C752CDE4D1A@CO6PR19MB5434.namprd19.prod.outlook.com>
References: <CO6PR19MB54347B4EBAD48BB8D2C752CDE4D1A@CO6PR19MB5434.namprd19.prod.outlook.com>
Message-ID: <C725A5D2-DFA7-417D-8D5D-E8D53A33E9C4@n1k.org>

Hi

One key tidbit on those paper labels:

There is a color logo on the label. That does not seem to fit a 1940?s / early 1950?s sort of rebuild process. 

Was the Navy repainting / rebuilding these past the mid 1950?s? (as distinct from restoring one for a museum display ?.)

Color wise, the paper and printing are in very good shape. That?s not impossible for a > 60 year time span, however it also seems unlikely.

I think I?d look at them under a microscope and see if there are artifacts from this or that modern ( = post 1970) printing process. 

Bob

> On Oct 14, 2023, at 12:26?PM, Hubert Miller <Kargo_cult at msn.com> wrote:
> 
> Hold off a bit on your conclusions about paper labels. This sounds familiar to me, maybe on an RBM power supply, but i can't quite remembet now. Re selectivity, i think i would rejoice over that fact, and just work on the audio channel.
> -Hue Miller
> 
> 
> 
> Sent from my Verizon, Samsung Galaxy smartphone
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
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From scr287 at att.net  Sat Oct 14 13:38:50 2023
From: scr287 at att.net (Jack Antonio)
Date: Sat, 14 Oct 2023 13:38:50 -0400
Subject: [Milsurplus] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <90211682.364652.1697298315820@connect.xfinity.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
	<90211682.364652.1697298315820@connect.xfinity.com>
Message-ID: <369c9f4e-9f01-431c-ace8-ab99ab0bf542@att.net>

Three things about the RAS receiver,

First, the manual is available on BAMA, but look in the National
section, not military.

Second. On the paper labels, I seem to recall that someone
was selling paper RAS labels about 10 or 15 years ago. I think, but not 
sure, that it was Glen Zook, K9STH. I remember being interested in that 
I had a couple of coil sets without tags, but decided the labels
didn't look "real" enough.

Third. The Navy's Catalog of Electronic Equipment 900,116, linked to
on Nick Englands website at https://maritime.org/doc/ecat/index.php#toc
lists replacement transformers for the RAS to widen the IF bandpass.
This made the CNA 46080 into a CNA 46080A.

I've had my RAS-2 (minus frame and speaker panel)since my high school
days too many years ago. Used it with a DX-40 as my Novice Station for
a few months.

Bought it from a friend of mine one weekend, and started firing it
up on Sunday afternoon. It came to life, but the dial was slipping.
No set screw. Chances of finding a set screw in a small town in the
Nevada desert on a Sunday afternoon being slim, I raided my Dad's
jar of bolts, and found a round headed brass bolt with the proper
thread. Problem solved.

That brass bolt is still there to this day. I could quickly
replace it, but just can't bring myself to do it.

Jack Antonio
WA7DIA



On 10/14/2023 11:45 AM, mstangelo at comcast.net wrote:
> Is the bandwidth limit only in the IF filters or are there also filters in the AF stage?
> 
> Where can we find a schematic of the RAS receiver?
>

From RAFANTINI at salisbury.edu  Sat Oct 14 13:52:11 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Sat, 14 Oct 2023 17:52:11 +0000
Subject: [Milsurplus] [MMRCG] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <90211682.364652.1697298315820@connect.xfinity.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
	<90211682.364652.1697298315820@connect.xfinity.com>
Message-ID: <DM8P220MB04728B2662657D32F2B436F2B8D1A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Think you may want to look at your receiver's audio chain? My RAS 5 with stock power supply, speaker and coils has good audio fidelity? I also have the Navy Limiter modification. Years ago, I did change out all of the old wax capacitors to mylar (Orang Drop). using period cans and the high impedance headphones output is not fun so almost always use the stock speaker but after years of running AM on forty and eighty have never had an issue with fidelity. The AVC mode is a bit limited on strong signals, but the RF gain always works and in AM using the RF gain the receiver sounds good? the big issue with that radio is the appearance of images on strong signals and being careful that you are not tuned to the image but only find that to be a problem on strong broadcast signals.
Between using that receiver for CW on eighty also use it for listening to local Talk radio with the 0.9 to 2.0 coil.
Have the entire service manual and can forward it to you from my computer at work, internet connection at home is to slow.

Ray F/KA3EKH

________________________________
From: MMRCG at groups.io <MMRCG at groups.io> on behalf of N2MS via groups.io <mstangelo=comcast.net at groups.io>
Sent: Saturday, October 14, 2023 11:45 AM
To: MMRCG <MMRCG at groups.io>; milsurplus at mailman <milsurplus at mailman.qth.net>
Subject: Re: [MMRCG] [Milsurplus] Navy RAS Receiver - Better Audio Fidelity?

CAUTION: This email originated from outside of Salisbury University. Please exercise caution when clicking links or opening attachments from external sources.


Is the bandwidth limit only in the IF filters or are there also filters in the AF stage?

Where can we find a schematic of the RAS receiver?

Mike N2MS

> On 10/14/2023 11:27 AM EDT David Stinson <arc5 at ix.netcom.com> wrote:
>
>
> Those who have worked on National RAS receivers:
> As you probably know, the RAS was designed as a CW
> receiver.  The RAS audio bandwidth drops off markedly
> above about 800 Cycles.  Not good for AM or BCB monitoring.
>
> Has anyone here found a non-destructive way to improve this?
> The IFs are themselves narrow at 175 KC, so have thought of
> placing resistors across those transformers to broaden them
> somewhat.  Anyone worked this issue?
>
> TNX OM DE Dave AB5S


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From reuben.popp at gmail.com  Sat Oct 14 14:43:33 2023
From: reuben.popp at gmail.com (Reuben Popp)
Date: Sat, 14 Oct 2023 13:43:33 -0500
Subject: [Milsurplus] R392 power connector
Message-ID: <CAB-aZK9r=Ui4y5+ji9BqikJiH-Qn2BAHiBVaTPqotkuSLZAU8A@mail.gmail.com>

Afternoon everyone.  Does anyone have a spare PL392 plug in their junk box
that they would be willing to part with?  It's the 9 pin plug that was
originally part of the cx-1599/u dogbone assembly.

Thanks in advance!
Reuben
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From RAFANTINI at salisbury.edu  Sat Oct 14 15:47:30 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Sat, 14 Oct 2023 19:47:30 +0000
Subject: [Milsurplus] [MMRCG] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
Message-ID: <DM8P220MB047220E2D42FEB25092CC355B8D1A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Looked at the pictures and have to say that I think the paint job and the labels are all Ham stuff. The RAS/HRO was already obsolete before the end of WW2 and have seen accounts of them in use at places like Shore Stations and for intercept work would think that there were tons of stuff available before the end of the war and would wonder why the Navy would depo one of those Dinosaurs. Don?t get me wrong, I love my RAS and think it?s a perfect example of the military version of the HRO and in the hands of a skilled operator outperforms many more modern radios, but all HRO receivers required a higher level of skill to use then a lot of the other stuff that was out there. The low noise floor of that receiver exceeds what a lot of the tube radios built in the fifties and sixties were not able to accomplish.

If anything, think that the paint job, different knobs and color labels were all an attempt by someone to make it look newer, kind of surprised they did not use the same shade of gray as the HRO sixty.

I attached a picture of my RAS.

Ray F/KA3EKH


________________________________
From: MMRCG at groups.io <MMRCG at groups.io> on behalf of David Stinson via groups.io <arc5=ix.netcom.com at groups.io>
Sent: Saturday, October 14, 2023 11:27 AM
To: MMRCG <MMRCG at groups.io>; milsurplus at mailman <milsurplus at mailman.qth.net>; Nick England <navy.radio at gmail.com>
Subject: [MMRCG] Navy RAS Receiver - Better Audio Fidelity?

CAUTION: This email originated from outside of Salisbury University. Please exercise caution when clicking links or opening attachments from external sources.


Those who have worked on National RAS receivers:
As you probably know, the RAS was designed as a CW
receiver.  The RAS audio bandwidth drops off markedly
above about 800 Cycles.  Not good for AM or BCB monitoring.

Has anyone here found a non-destructive way to improve this?
The IFs are themselves narrow at 175 KC, so have thought of
placing resistors across those transformers to broaden them
somewhat.  Anyone worked this issue?

TNX OM DE Dave AB5S

--
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From arc5 at ix.netcom.com  Sat Oct 14 16:01:07 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sat, 14 Oct 2023 15:01:07 -0500
Subject: [Milsurplus] [MMRCG] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <DM8P220MB047220E2D42FEB25092CC355B8D1A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
	<DM8P220MB047220E2D42FEB25092CC355B8D1A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <ec22ab72-1557-48b9-b6ca-a0b27b35ef6e@ix.netcom.com>

Thanks for the reply, Ray.
Nick has, in his RAS database, photos of a set with the
same colour repaint as this one, which is why I think
it's possible for it to be a depot refurb:

https://www.navy-radio.com/rcvrs/ww2/ras/ras5-301.JPG
https://www.navy-radio.com/rcvrs/ww2/ras/ras5-314.jpg

Also- the original RAS speaker has a round-magnet,
while those that appear to have been refurbed
have the square-box magnet.

In any event- I'll be hunting original tags.
The paper ones are pretty, but I like the "real" ones.

73 DE Dave AB5S





On 10/14/2023 2:47 PM, Ray Fantini wrote:
> Looked at the pictures and have to say that I think the paint job and 
> the labels are all Ham stuff.

-- 
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From pfthekan at gmail.com  Sat Oct 14 16:38:36 2023
From: pfthekan at gmail.com (Paul Thekan)
Date: Sat, 14 Oct 2023 13:38:36 -0700
Subject: [Milsurplus] [MMRCG] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <ec22ab72-1557-48b9-b6ca-a0b27b35ef6e@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
	<DM8P220MB047220E2D42FEB25092CC355B8D1A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<ec22ab72-1557-48b9-b6ca-a0b27b35ef6e@ix.netcom.com>
Message-ID: <CAK4LMKME39Mh4a_-_yoO3aJDQC6i_Hh5k034ZAF2nzRGazNrkg@mail.gmail.com>

Dave and all..
That pic you posted of the Navy gray RAS I own now after buying it at a
CHRS sale here. They got it at a defunct Mare Island Museum and in the
process of moving it dropped it in such a way to wreck the PW dial and bend
the tuning shaft. Replaced both dial and gear box. As you can see it's
missing the ps data tag..still.
 It's a darker gray/blue I think than yours. Though I think yours has had a
rattle can repaint as if you look on the pic, I think of the spkr panel,
you can see the back a forth spray pattern of a spray can paint job...I've
suffered  the same here
 I've ve been working on  a repaint of a gray TCS 5 rcvr cabinet to match
the front panel which is like the gray on my RAS. No luck at all here in
trying to match that gray.  Went through 5 different shades of spray cans
of gray before I found something barely close to match it to the front
panel.
 Hope you can find some data plates for your nice RAS...and the correct
control knobs

Paul
N6FEG

On Sat, Oct 14, 2023, 1:01 PM David Stinson <arc5 at ix.netcom.com> wrote:

> Thanks for the reply, Ray.
> Nick has, in his RAS database, photos of a set with the
> same colour repaint as this one, which is why I think
> it's possible for it to be a depot refurb:
>
> https://www.navy-radio.com/rcvrs/ww2/ras/ras5-301.JPG
> https://www.navy-radio.com/rcvrs/ww2/ras/ras5-314.jpg
>
> Also- the original RAS speaker has a round-magnet,
> while those that appear to have been refurbed
> have the square-box magnet.
>
> In any event- I'll be hunting original tags.
> The paper ones are pretty, but I like the "real" ones.
>
> 73 DE Dave AB5S
>
>
>
>
>
> On 10/14/2023 2:47 PM, Ray Fantini wrote:
> > Looked at the pictures and have to say that I think the paint job and
> > the labels are all Ham stuff.
>
> --
> This email has been checked for viruses by Avast antivirus software.
> www.avast.com
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
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From r390a.urr at gmail.com  Sat Oct 14 17:41:39 2023
From: r390a.urr at gmail.com (Dave Merrill)
Date: Sat, 14 Oct 2023 16:41:39 -0500
Subject: [Milsurplus] R392 power connector
In-Reply-To: <CAB-aZK9r=Ui4y5+ji9BqikJiH-Qn2BAHiBVaTPqotkuSLZAU8A@mail.gmail.com>
References: <CAB-aZK9r=Ui4y5+ji9BqikJiH-Qn2BAHiBVaTPqotkuSLZAU8A@mail.gmail.com>
Message-ID: <CAGRTi8XJXfBT0w-2zWFrzybq5KGCSU5ii4A53YTNu9y1spyDwA@mail.gmail.com>

Bill Perry 502-893-8724 stocks these at a reasonable price.

Dave N9ZC

On Sat, Oct 14, 2023, 1:43 PM Reuben Popp <reuben.popp at gmail.com> wrote:

> Afternoon everyone.  Does anyone have a spare PL392 plug in their junk box
> that they would be willing to part with?  It's the 9 pin plug that was
> originally part of the cx-1599/u dogbone assembly.
>
> Thanks in advance!
> Reuben
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From rpmeadow at bellsouth.net  Sat Oct 14 18:23:43 2023
From: rpmeadow at bellsouth.net (Robert P. Meadows)
Date: Sat, 14 Oct 2023 18:23:43 -0400
Subject: [Milsurplus] [MMRCG] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <ec22ab72-1557-48b9-b6ca-a0b27b35ef6e@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>	<f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>	<DM8P220MB047220E2D42FEB25092CC355B8D1A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<ec22ab72-1557-48b9-b6ca-a0b27b35ef6e@ix.netcom.com>
Message-ID: <02d201d9feed$18a6a920$49f3fb60$@bellsouth.net>

>From a few conversations with a few fellows, older than me, the US NAVY in
its infinite wisdom decided that all radio equipment should have grey front
panels in the late 50's early 60's, hence, all radios that went to (if
memory is correct, shop 39) at the various Navy shipyards, for
"repair/rework/refurbishment" the radios and associated equipment was
refinished to grey.  There has been some conjecture about an Admiral's wife
who didn't like black front  radios...
Most of the equipment I have or have seen that has grey panels, or has been
reworked will have the shipyard ID plate and shop number affixed to the
equipment indicating work was done, and normally those tags are brass or
metal etched aluminum.  A specific notation is on the SRA-22 antenna
couplers that were used primarily with the URC-32 (Navy KWT-6) noting that
only emergency repairs were permitted and in case of failure the coupler was
to be returned without opening to the designated shipyard for repair.  That
due to the beryllium oxide coil form inside them.  Of course the units were
kept under dry nitrogen pressure, something that the local radiomen who
maintained the gear were mostly capable of recharging.
R

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
<milsurplus-bounces at mailman.qth.net> On Behalf Of David Stinson
Sent: Saturday, October 14, 2023 4:01 PM
To: Ray Fantini <RAFANTINI at salisbury.edu>; MMRCG <MMRCG at groups.io>;
milsurplus at mailman <milsurplus at mailman.qth.net>; Nick England
<navy.radio at gmail.com>
Subject: Re: [Milsurplus] [MMRCG] Navy RAS Receiver - Better Audio Fidelity?

Thanks for the reply, Ray.
Nick has, in his RAS database, photos of a set with the same colour repaint
as this one, which is why I think it's possible for it to be a depot refurb:

https://www.navy-radio.com/rcvrs/ww2/ras/ras5-301.JPG
https://www.navy-radio.com/rcvrs/ww2/ras/ras5-314.jpg

Also- the original RAS speaker has a round-magnet, while those that appear
to have been refurbed have the square-box magnet.

In any event- I'll be hunting original tags.
The paper ones are pretty, but I like the "real" ones.

73 DE Dave AB5S





On 10/14/2023 2:47 PM, Ray Fantini wrote:
> Looked at the pictures and have to say that I think the paint job and 
> the labels are all Ham stuff.

--
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______________________________________________________________
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Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

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From Kargo_cult at msn.com  Sat Oct 14 21:05:37 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Sun, 15 Oct 2023 01:05:37 +0000
Subject: [Milsurplus] [MMRCG] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <02d201d9feed$18a6a920$49f3fb60$@bellsouth.net>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
	<DM8P220MB047220E2D42FEB25092CC355B8D1A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<ec22ab72-1557-48b9-b6ca-a0b27b35ef6e@ix.netcom.com>
	<02d201d9feed$18a6a920$49f3fb60$@bellsouth.net>
Message-ID: <CO6PR19MB54342ED60656A19025F3D26DE4D0A@CO6PR19MB5434.namprd19.prod.outlook.com>

I have somewhere in my stash a grey overhauled TBY. As i continue downsizing, i will eventually get to it. 
I want so much to go over it with a counter. I am so curious how they approached the radium paint concern,
or if they did at all ! Not a job i would want, i mean stripping and repainting it. 
( I also saw one a fellow ham had repainted. I didn't say anything, i just thought, "OOOOOOOH". ) 
-Hue Miller 

From navy.radio at gmail.com  Sat Oct 14 21:34:14 2023
From: navy.radio at gmail.com (Nick England)
Date: Sat, 14 Oct 2023 21:34:14 -0400
Subject: [Milsurplus] [MMRCG] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <02d201d9feed$18a6a920$49f3fb60$@bellsouth.net>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
	<DM8P220MB047220E2D42FEB25092CC355B8D1A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<ec22ab72-1557-48b9-b6ca-a0b27b35ef6e@ix.netcom.com>
	<02d201d9feed$18a6a920$49f3fb60$@bellsouth.net>
Message-ID: <CAB55hNfCiWkX2qgUoT4pAEQM+ViT38NY6AqShWXJ4du2FUAdMA@mail.gmail.com>

Project Zebra and ERUPT - shipyard refurbishing gear after the war. Shop 67
IIRC.
See July 1948 BuShips Electron
https://www.navy-radio.com/manuals/electron.htm

I believe all gear introduced after the war switched to gray from black.

Navy gear from 1945-1951? was a darker shade of gray. I use Rustoleum Dark
MachineGray for older gear and Rustoleum LightMachine Gray for newer gear.
They are both gloss rather than semi-gloss, but I am not picky.
Light Machine Gray is a very close match to the official 26307 and Dark
Machine Gray looks like 26152 which seems to be the older color
==================
According to MIL-E-16400 governing Navy electronics equipment:
The paint spec for Navy electronics equipment for Interior Use is
MIL-E-15090
http://www.wbdg.org/ccb/FEDMIL/dtl15090d.pdf
The paint is called Navy Formula No. 111
The color must match color number 26307 of FED-STD-595
Semi-gloss DTM alkyd enamel.

See FED-STD-595C 26307
https://www.myperfectcolor.com/paint/29446-us-government-fed-std-595c-26307
=========


On Sat, Oct 14, 2023 at 6:23 PM Robert P. Meadows <rpmeadow at bellsouth.net>
wrote:

> From a few conversations with a few fellows, older than me, the US NAVY in
> its infinite wisdom decided that all radio equipment should have grey front
> panels in the late 50's early 60's, hence, all radios that went to (if
> memory is correct, shop 39) at the various Navy shipyards, for
> "repair/rework/refurbishment" the radios and associated equipment was
> refinished to grey.  There has been some conjecture about an Admiral's wife
> who didn't like black front  radios...
> Most of the equipment I have or have seen that has grey panels, or has been
> reworked will have the shipyard ID plate and shop number affixed to the
> equipment indicating work was done, and normally those tags are brass or
> metal etched aluminum.  A specific notation is on the SRA-22 antenna
> couplers that were used primarily with the URC-32 (Navy KWT-6) noting that
> only emergency repairs were permitted and in case of failure the coupler
> was
> to be returned without opening to the designated shipyard for repair.  That
> due to the beryllium oxide coil form inside them.  Of course the units were
> kept under dry nitrogen pressure, something that the local radiomen who
> maintained the gear were mostly capable of recharging.
> R
>
> -----Original Message-----
> From: milsurplus-bounces at mailman.qth.net
> <milsurplus-bounces at mailman.qth.net> On Behalf Of David Stinson
> Sent: Saturday, October 14, 2023 4:01 PM
> To: Ray Fantini <RAFANTINI at salisbury.edu>; MMRCG <MMRCG at groups.io>;
> milsurplus at mailman <milsurplus at mailman.qth.net>; Nick England
> <navy.radio at gmail.com>
> Subject: Re: [Milsurplus] [MMRCG] Navy RAS Receiver - Better Audio
> Fidelity?
>
> Thanks for the reply, Ray.
> Nick has, in his RAS database, photos of a set with the same colour repaint
> as this one, which is why I think it's possible for it to be a depot
> refurb:
>
> https://www.navy-radio.com/rcvrs/ww2/ras/ras5-301.JPG
> https://www.navy-radio.com/rcvrs/ww2/ras/ras5-314.jpg
>
> Also- the original RAS speaker has a round-magnet, while those that appear
> to have been refurbed have the square-box magnet.
>
> In any event- I'll be hunting original tags.
> The paper ones are pretty, but I like the "real" ones.
>
> 73 DE Dave AB5S
>
>
>
>
>
> On 10/14/2023 2:47 PM, Ray Fantini wrote:
> > Looked at the pictures and have to say that I think the paint job and
> > the labels are all Ham stuff.
>
> --
> This email has been checked for viruses by Avast antivirus software.
> www.avast.com
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
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From Kargo_cult at msn.com  Sat Oct 14 21:56:49 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Sun, 15 Oct 2023 01:56:49 +0000
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
Message-ID: <CO6PR19MB5434FE6C96047906826303F4E4D0A@CO6PR19MB5434.namprd19.prod.outlook.com>

Grey paint doesn't look right, too dark ? Something strikes me as wrong with the exact color.
Switch on PS, left side, is that original ? Certainly the switch escutcheon is not ?
The paper labels are not right for U.S. Gov't issue. The paper nameplate i saw was under plastic with a plastic frame around it. 
Perhaps the original paint and nameplates were 'beat', and someone wanted it to look "nice".
-Hue Miller 

From arc5 at ix.netcom.com  Sun Oct 15 07:48:53 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 15 Oct 2023 06:48:53 -0500
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
Message-ID: <1f9a7400-1561-4864-b685-304aa599ca70@ix.netcom.com>

Here's another example of an RAS item repainted,
including the inside of the chassis, with that
same colour.

https://www.ebay.com/itm/145124093793

The cover wasn't done but probably
from another set.  That makes 3 matching examples.
I doubt they could be "ham" one-offs.
I will make a close exam of the laminated labels.

73 Dave AB5S

-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com

From arc5 at ix.netcom.com  Sun Oct 15 08:05:20 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 15 Oct 2023 07:05:20 -0500
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <1f9a7400-1561-4864-b685-304aa599ca70@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<1f9a7400-1561-4864-b685-304aa599ca70@ix.netcom.com>
Message-ID: <76fac058-7112-4834-ae37-b39bd094c0e5@ix.netcom.com>

P.S.
My power supply, the one on Ebay and the refurb
set on Nick's web site all have the same model
added power switch and all in the same location.
The speakers have been replaced with the same type.
The laminated paper labels- other than the small ones
on the bottom- have been riveted in place.
This isn't "ham" work.
73 Dave AB5S



-- 
This email has been checked for viruses by Avast antivirus software.
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From arc5 at ix.netcom.com  Sun Oct 15 09:12:00 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 15 Oct 2023 08:12:00 -0500
Subject: [Milsurplus] DAV/MAB Stuff for Trade.
Message-ID: <81624899-94a3-456b-8a48-01adee6be7a4@ix.netcom.com>

I have a bunch of MAB/DAV stuff; probably enough to build one of each. 
Includes a scarce original DAV module which attached to an MAB.
Don't have the odd RF module for that so probably a scarce display item. 
  Photos at:

https://photos.app.goo.gl/HVpCEqgZ7m5RSfVg6

Seeking trade plus $20 to help with the shipping of a big double box.

Wish List:
No interest in anything which has been drilled, chain-sawed, flooded in 
a basement, hopelessly paint-less, left in the rain since 1956, 
hay-wired or otherwise defiled.
My mil-radio interests go from Marconi to Korea; nothing later.

AN/TRC-7 Transceiver- accessories a plus.

Unusual, scarce or rare Aircraft Radio Corp items
I don't already have,
especially those marked with the "Circle-M."

Open to other uncommon or hard-to-find items.

If no takers, will go to Ebay.

TNX Dave AB5S







-- 
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From arc5 at ix.netcom.com  Sun Oct 15 09:20:06 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 15 Oct 2023 08:20:06 -0500
Subject: [Milsurplus] Forgiveness Requested.
Message-ID: <a3b58092-2534-474e-a77f-460988c96945@ix.netcom.com>

Folks- I'm deep into "Old Fart" territory now.
Having a LOT of trouble keeping focus on tasks
and remembering them. It's really getting
distressing.

I'm certain there are people out there whom
I owe something and it has drifted into the
gathering darkness between my ears.

I humbly ask your forgiveness.
Please send me an email so I can fix
my fumbles.

73 Dave AB5S


-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com

From arc5 at ix.netcom.com  Sun Oct 15 09:27:35 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 15 Oct 2023 08:27:35 -0500
Subject: [Milsurplus] [MMRCG] BC-186 Connector
In-Reply-To: <178E4AA4B6032C03.8679@groups.io>
References: <41a2c630-1aad-3f08-6f65-1534397dd536@ix.netcom.com>
	<5a0a7771-8629-9f1b-d7cb-58433cc0fcc3@nova.org>
	<178E4AA4B6032C03.8679@groups.io>
Message-ID: <94f7c421-cd72-405e-ac97-a236673eaf4c@ix.netcom.com>

OOPS.  Wrong address.  Sorry!
But to make lemonaide of my lemon-
Does anyone have the inside diameter of the 6-pin
connector on the BC-186?  I have three plugs
but they are all different diameters.
Thanks.

On 10/15/2023 8:24 AM, David Stinson wrote:
> Hello, Tom.
> I wrote awhile back that I had three different
> 6-pin connectors, one of which might fit your
> BC-186.? I probably sent the mail to Timbucktoo
> or something.
> If you could measure the inside diameter of
> the connector, I'll see if one of these will fit
> and send it to you.
> 
> Did I ever send you postage for the kindness
> you did me with the tube socket?
> 
> 73 Dave S.
> 

-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com

From arc5 at ix.netcom.com  Sun Oct 15 11:01:00 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 15 Oct 2023 10:01:00 -0500
Subject: [Milsurplus] [Boatanchors] Forgiveness Requested.
In-Reply-To: <005e01d9ff74$611f49f0$235dddd0$@frontier.com>
References: <a3b58092-2534-474e-a77f-460988c96945@ix.netcom.com>
	<005e01d9ff74$611f49f0$235dddd0$@frontier.com>
Message-ID: <f7286a11-bc18-40ad-a16a-1f5d8ed36657@ix.netcom.com>

Very kind of you, Dale.
I think I learned more.  We have an awesome community.

On 10/15/2023 9:32 AM, Dale Parfitt wrote:
> Hi David,
> More like we owe you- for all of your posts and restorations, teaching us
> the art.
> 
> Thank you,
> Dale W4OP
> 
> -----Original Message-----
> From: boatanchors-bounces at mailman.qth.net
> [mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of David Stinson
> Sent: Sunday, October 15, 2023 9:20 AM
> To: Boatanchors at mailman; MMRCG; milsurplus at mailman; ARC-5
> Subject: [Boatanchors] Forgiveness Requested.
> 
> Folks- I'm deep into "Old Fart" territory now.
> Having a LOT of trouble keeping focus on tasks
> and remembering them. It's really getting
> distressing.
> 
> I'm certain there are people out there whom
> I owe something and it has drifted into the
> gathering darkness between my ears.
> 
> I humbly ask your forgiveness.
> Please send me an email so I can fix
> my fumbles.
> 
> 73 Dave AB5S
> 
> 

-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com

From kb8tq at n1k.org  Sun Oct 15 11:16:58 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Sun, 15 Oct 2023 11:16:58 -0400
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <76fac058-7112-4834-ae37-b39bd094c0e5@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<1f9a7400-1561-4864-b685-304aa599ca70@ix.netcom.com>
	<76fac058-7112-4834-ae37-b39bd094c0e5@ix.netcom.com>
Message-ID: <49A9F6A8-2F4E-48D4-89AA-2A262BB912ED@n1k.org>

Hi

Was somebody (at some point in the last 40 years) selling the paper labels as a ?kit?? 

It seems like something one could do from home. If so, it?s strange that none of us have heard of or seen any more than a very few examples ?.

Bob

> On Oct 15, 2023, at 8:05?AM, David Stinson <arc5 at ix.netcom.com> wrote:
> 
> P.S.
> My power supply, the one on Ebay and the refurb
> set on Nick's web site all have the same model
> added power switch and all in the same location.
> The speakers have been replaced with the same type.
> The laminated paper labels- other than the small ones
> on the bottom- have been riveted in place.
> This isn't "ham" work.
> 73 Dave AB5S
> 
> 
> 
> -- 
> This email has been checked for viruses by Avast antivirus software.
> www.avast.com
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


From navy.radio at gmail.com  Sun Oct 15 13:15:24 2023
From: navy.radio at gmail.com (Nick England)
Date: Sun, 15 Oct 2023 13:15:24 -0400
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
Message-ID: <CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>

Well I was just taking another look at Dave's photos before adding them to
my "puzzlers" page, when I noticed the non-navy serial number on the RAS-5
tag. I'll bet two inflated dollars vs a non-inflated donut that Bob Peters
K1JNN (SK) and Glen Zook K9STH (SK) are responsible for this particular
RAS-5

https://puck.nether.net/pipermail/boatanchors/2001-July/009440.html
https://puck.nether.net/pipermail/boatanchors/2001-September/009782.html

https://obituaries.bangordailynews.com/obituary/robert-peters-804492711
https://www.forevermissed.com/glen-earl-zook/about

Nick England K4NYW
www.navy-radio.com


On Sat, Oct 14, 2023 at 1:17?AM David Stinson <arc5 at ix.netcom.com> wrote:

> Recently acquired this complete RAS receiver rack.
> I've seen and have WWII-era U.S. Navy receivers
> which were originally black wrinkle with the old
> paint stripped, repainted with gray-to-blue-gray
> untextured paint and with (if they are in
> good condition) their nomenclature plates remounted.
> This one has been stripped and professionally repainted,
> but all the tags have been replaced with laminated paper.
> Photos:
>
> https://photos.app.goo.gl/EaaKdEHbp8TjbB6q6
> https://photos.app.goo.gl/FqvN2dHAGfp3RtUG6
> https://photos.app.goo.gl/tVGmeKfBXzo7v8Nc8
> https://photos.app.goo.gl/LQnWky5njWgtvKtE7
>
> Anyone seen this before?  What do you think?
>
> TNX OM ES 73 DE Dave AB5S
>
> --
> This email has been checked for viruses by Avast antivirus software.
> www.avast.com
>
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From RAFANTINI at salisbury.edu  Sun Oct 15 13:43:03 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Sun, 15 Oct 2023 17:43:03 +0000
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
Message-ID: <DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Don?t intend to start any trouble, if you?re happy with that paint scheme cool. But all the old prewar and everything up to the HRO-5T were black from the factory.  My power supply (CAN-20090) came with a AC power switch in the same location although it?s sideways and has a small brass plate for ON and OFF, also I have never seen a HRO without knob skirts, the later series National radios came without skirts. My CAN-49105 speaker panel has the square magnet and the National plate to coil transformer mounted to the back.

It?s a great radio for its age; remember reading about how several were used at the Navy radio intercept station in the Philippines before it fell in the first months of the war. Several were also in use on the Lexington that was lost at the battle of the Coral Sea.

It?s a revolutionary radio for when it was introduced in 1935 that exceeded anything on the market but ten or fifteen years later would think it would not be in high enough demand for a retrofit. Not to take away from the fact that in 1940 it was in high demand for British Y-Service stations intercept work, the HR0-5M and so appreciated by the Nazis that they produced an almost identical copy, the KST.

But then again, the government, Navy included, has done lots of other questionable things.

So, I cannot confirm my speculations.

Ray F/KA3EKH


________________________________
From: MMRCG at groups.io <MMRCG at groups.io> on behalf of Nick K4NYW via groups.io <navy.radio=gmail.com at groups.io>
Sent: Sunday, October 15, 2023 1:15 PM
To: David Stinson <arc5 at ix.netcom.com>
Cc: MMRCG <MMRCG at groups.io>; milsurplus at mailman <milsurplus at mailman.qth.net>
Subject: Re: [MMRCG] Refurbed (?) U.S. Navy RAS Receiver


CAUTION: This email originated from outside of Salisbury University. Please exercise caution when clicking links or opening attachments from external sources.


Well I was just taking another look at Dave's photos before adding them to my "puzzlers" page, when I noticed the non-navy serial number on the RAS-5 tag. I'll bet two inflated dollars vs a non-inflated donut that Bob Peters K1JNN (SK) and Glen Zook K9STH (SK) are responsible for this particular RAS-5

https://puck.nether.net/pipermail/boatanchors/2001-July/009440.html
https://puck.nether.net/pipermail/boatanchors/2001-September/009782.html

https://obituaries.bangordailynews.com/obituary/robert-peters-804492711
https://www.forevermissed.com/glen-earl-zook/about

Nick England K4NYW
www.navy-radio.com<http://www.navy-radio.com/>


On Sat, Oct 14, 2023 at 1:17?AM David Stinson <arc5 at ix.netcom.com<mailto:arc5 at ix.netcom.com>> wrote:
Recently acquired this complete RAS receiver rack.
I've seen and have WWII-era U.S. Navy receivers
which were originally black wrinkle with the old
paint stripped, repainted with gray-to-blue-gray
untextured paint and with (if they are in
good condition) their nomenclature plates remounted.
This one has been stripped and professionally repainted,
but all the tags have been replaced with laminated paper.
Photos:

https://photos.app.goo.gl/EaaKdEHbp8TjbB6q6
https://photos.app.goo.gl/FqvN2dHAGfp3RtUG6
https://photos.app.goo.gl/tVGmeKfBXzo7v8Nc8
https://photos.app.goo.gl/LQnWky5njWgtvKtE7

Anyone seen this before?  What do you think?

TNX OM ES 73 DE Dave AB5S

--
This email has been checked for viruses by Avast antivirus software.
www.avast.com<http://www.avast.com/>
_._,_._,_
________________________________
Groups.io Links:

You receive all messages sent to this group.

View/Reply Online (#3699)<https://groups.io/g/MMRCG/message/3699> | Reply To Group<mailto:MMRCG at groups.io?subject=Re:%20Re%3A%20%5BMMRCG%5D%20Refurbed%20%28%3F%29%20U.S.%20Navy%20RAS%20Receiver> | Reply To Sender<mailto:navy.radio at gmail.com?subject=Private:%20Re:%20Re%3A%20%5BMMRCG%5D%20Refurbed%20%28%3F%29%20U.S.%20Navy%20RAS%20Receiver> | Mute This Topic<https://groups.io/mt/101955889/1043670> | New Topic<https://groups.io/g/MMRCG/post>
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From kgordon2006 at frontier.com  Sun Oct 15 13:48:46 2023
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Sun, 15 Oct 2023 10:48:46 -0700
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>,
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
Message-ID: <652C25FE.19545.1025916B@kgordon2006.frontier.com>

Bingo, Nick.

Ken W7EKB

On 15 Oct 2023 at 13:15, Nick England wrote:

> 
> Well I was just taking another look at Dave's photos before adding
> them to my "puzzlers" page, when I noticed the non-navy serial number
> on the RAS-5 tag. I'll bet two inflated dollars vs a non-inflated
> donut that Bob Peters K1JNN (SK) and Glen Zook K9STH (SK) are
> responsible for this particular RAS-5??
> 
> https://puck.nether.net/pipermail/boatanchors/2001-July/009440.html
> https://puck.nether.net/pipermail/boatanchors/2001-September/009782.ht
> ml
> 
> https://obituariesbangordailynews.com/obituary/robert-peters-804492711
> https://www.forevermissed.com/glen-earl-zook/about
> 
> Nick England K4NYW
> www.navy-radio.com
> 
> 
> On Sat, Oct 14, 2023 at 1:17AM David Stinson <arc5 at ix.netcom.com>
> wrote: Recently acquired this complete RAS receiver rack I've seen and
> have WWII-era U.S. Navy receivers which were originally black wrinkle
> with the old paint stripped, repainted with gray-to-blue-gray
> untextured paint and with (if they are in good condition) their
> nomenclature plates remounted. This one has been stripped and
> professionally repainted, but all the tags have been replaced with
> laminated paper. Photos:
> 
> https://photos.app.goo.gl/EaaKdEHbp8TjbB6q6
> https://photos.app.goo.gl/FqvN2dHAGfp3RtUG6
> https://photos.app.goo.gl/tVGmeKfBXzo7v8Nc8
> https://photos.app.goo.gl/LQnWky5njWgtvKtE7
> 
> Anyone seen this before?? What do you think?
> 
> TNX OM ES 73 DE Dave AB5S
> 
> --
> This email has been checked for viruses by Avast antivirus software.
> www.avast.com
> 



From arc5 at ix.netcom.com  Sun Oct 15 14:06:30 2023
From: arc5 at ix.netcom.com (arc5 at ix.netcom.com)
Date: Sun, 15 Oct 2023 13:06:30 -0500
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
Message-ID: <280478a8-90da-46e5-8223-dba0bd18298a@localhost>



Sent using myEarthLink

On Sun Oct 15 12:48:54 CDT 2023 "Ken

Ken W7EKB

On 15 Oct 2023 at 13:15, Nick England I'll bet two Ray/Nick:
No harm no foul, friends. I was hoping for point-counterpoint.

>Bob Peters K1JNN (SK)
> and Glen Zook K9STH (SK)

I haven't heard the story of how these two gentlemen figure in who the laminated paper tags. Sure would like to.
73 Dave S.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>

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From arc5 at ix.netcom.com  Sun Oct 15 14:11:10 2023
From: arc5 at ix.netcom.com (arc5 at ix.netcom.com)
Date: Sun, 15 Oct 2023 13:11:10 -0500
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
Message-ID: <41e4ad46-8f18-4859-8507-dcb28eb2cdc0@localhost>

Sorry. I can't get the links to load.
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From old_radio at aol.com  Sun Oct 15 14:42:36 2023
From: old_radio at aol.com (Jim Whartenby)
Date: Sun, 15 Oct 2023 18:42:36 +0000 (UTC)
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <1326527277.15896951.1697395356362@mail.yahoo.com>

I'm sure that the RAS is a find receiver but what about the 1931 RAB?? See:?https://skywaves.ar88.net/commrx/RCA/RAB/RAB.html455 pounds puts it in a class of it's own!? <grin>Regards,Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy 

    On Sunday, October 15, 2023 at 12:43:31 PM CDT, Ray Fantini <rafantini at salisbury.edu> wrote:  
 
 
Don?t intend to start any trouble, if you?re happy with that paint scheme cool. But all the old prewar and everything up to the HRO-5T were black from the factory.?My power supply (CAN-20090) came with a AC power switch in the same location although it?s sideways and has a small brass plate for ON and OFF, also I have never seen a HRO without knob skirts, the later series National radios came without skirts. My CAN-49105 speaker panel has the square magnet and the National plate to coil transformer mounted to the back.

It?s a great radio for its age; remember reading about how several were used at the Navy radio intercept station in the Philippines before it fell in the first months of the war. Several were also in use on the Lexington that was lost at the battle of the Coral Sea .

It?s a revolutionary radio for when it was introduced in 1935 that exceeded anything on the market but ten or fifteen years later would think it would not be in high enough demand for a retrofit. Not to take away from the fact that in 1940 it was in high demand for British Y-Service stations intercept work, the HR0-5M and so appreciated by the Nazis that they produced an almost identical copy, the KST.

But then again, the government, Navy included, has done lots of other questionable things.

So, I cannot confirm my speculations.

?

Ray F/KA3EKH


 ?
 
From: MMRCG at groups.io <MMRCG at groups.io> on behalf of Nick K4NYW via groups.io <navy.radio=gmail.com at groups.io>
Sent: Sunday, October 15, 2023 1:15 PM
To: David Stinson <arc5 at ix.netcom.com>
Cc: MMRCG <MMRCG at groups.io>; milsurplus at mailman <milsurplus at mailman.qth.net>
Subject: Re: [MMRCG] Refurbed (?) U.S. Navy RAS Receiver?

CAUTION: This email originated from outside of Salisbury University. Please exercise caution when clicking links or opening attachments from external sources.


Well I was just taking another look at Dave's photos before adding them to my "puzzlers" page, when I noticed the non-navy serial number on the RAS-5 tag. I'll bet two inflated dollars vs a non-inflated donut that Bob Peters K1JNN (SK) and Glen Zook K9STH (SK) are responsible for this particular RAS-5?? 

https://puck.nether.net/pipermail/boatanchors/2001-July/009440.htmlhttps://puck.nether.net/pipermail/boatanchors/2001-September/009782.html
https://obituaries.bangordailynews.com/obituary/robert-peters-804492711https://www.forevermissed.com/glen-earl-zook/about
Nick England K4NYW
www.navy-radio.com


On Sat, Oct 14, 2023 at 1:17?AM David Stinson <arc5 at ix.netcom.com> wrote:

Recently acquired this complete RAS receiver rack.
I've seen and have WWII-era U.S. Navy receivers
which were originally black wrinkle with the old
paint stripped, repainted with gray-to-blue-gray
untextured paint and with (if they are in
good condition) their nomenclature plates remounted.
This one has been stripped and professionally repainted,
but all the tags have been replaced with laminated paper.
Photos:

https://photos.app.goo.gl/EaaKdEHbp8TjbB6q6
https://photos.app.goo.gl/FqvN2dHAGfp3RtUG6
https://photos.app.goo.gl/tVGmeKfBXzo7v8Nc8
https://photos.app.goo.gl/LQnWky5njWgtvKtE7

Anyone seen this before?? What do you think?

TNX OM ES 73 DE Dave AB5S

-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com

_._,_._,_Groups.io Links:
You receive all messages sent to this group. 

View/Reply Online (#3699) | Reply To Group | Reply To Sender | Mute This Topic | New Topic 
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From RAFANTINI at salisbury.edu  Sun Oct 15 15:01:32 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Sun, 15 Oct 2023 19:01:32 +0000
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <1326527277.15896951.1697395356362@mail.yahoo.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<1326527277.15896951.1697395356362@mail.yahoo.com>
Message-ID: <DM8P220MB04729DDFBEDB07023594F017B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

RAB was one of the first super-heterodyne out there and a great example of what the newer technology as compared to TRF had to offer, but when the HRO, not as much the RAS but the regular HRO rolled out look what it had to offer, not only a super het but also crystal filter in the IF and a working AVC system that used tubes built around the idea of applied AVC.

The RAS was somewhat like a HRO jr. without filter or S meter but there was the very mysterious Noise Limiter modification kit where you removed the detector AVC tube and stuffed that small assembly in the radio and it eliminated all the problems that the radio had with lightning burst and other high impulse noise. The mysterious thing is that no one can adequately explain how it works!

Ray F/KA3EKH
________________________________
From: MMRCG at groups.io <MMRCG at groups.io> on behalf of Jim Whartenby via groups.io <old_radio=aol.com at groups.io>
Sent: Sunday, October 15, 2023 2:42 PM
To: MMRCG at groups.io <mmrcg at groups.io>
Cc: milsurplus at mailman <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver

You don't often get email from old_radio=aol.com at groups.io. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification>

CAUTION: This email originated from outside of Salisbury University. Please exercise caution when clicking links or opening attachments from external sources.


I'm sure that the RAS is a find receiver but what about the 1931 RAB?  See: https://skywaves.ar88.net/commrx/RCA/RAB/RAB.html
455 pounds puts it in a class of it's own!  <grin>
Regards,
Jim

Logic: Method used to arrive at the wrong conclusion, with confidence.  Murphy


On Sunday, October 15, 2023 at 12:43:31 PM CDT, Ray Fantini <rafantini at salisbury.edu> wrote:



Don?t intend to start any trouble, if you?re happy with that paint scheme cool. But all the old prewar and everything up to the HRO-5T were black from the factory.  My power supply (CAN-20090) came with a AC power switch in the same location although it?s sideways and has a small brass plate for ON and OFF, also I have never seen a HRO without knob skirts, the later series National radios came without skirts. My CAN-49105 speaker panel has the square magnet and the National plate to coil transformer mounted to the back.

It?s a great radio for its age; remember reading about how several were used at the Navy radio intercept station in the Philippines before it fell in the first months of the war. Several were also in use on the Lexington that was lost at the battle of the Coral Sea .

It?s a revolutionary radio for when it was introduced in 1935 that exceeded anything on the market but ten or fifteen years later would think it would not be in high enough demand for a retrofit. Not to take away from the fact that in 1940 it was in high demand for British Y-Service stations intercept work, the HR0-5M and so appreciated by the Nazis that they produced an almost identical copy, the KST.

But then again, the government, Navy included, has done lots of other questionable things.

So, I cannot confirm my speculations.



Ray F/KA3EKH



________________________________
From: MMRCG at groups.io <MMRCG at groups.io> on behalf of Nick K4NYW via groups.io <navy.radio=gmail.com at groups.io>

Sent: Sunday, October 15, 2023 1:15 PM
To: David Stinson <arc5 at ix.netcom.com>
Cc: MMRCG <MMRCG at groups.io>; milsurplus at mailman <milsurplus at mailman.qth.net>
Subject: Re: [MMRCG] Refurbed (?) U.S. Navy RAS Receiver


CAUTION: This email originated from outside of Salisbury University. Please exercise caution when clicking links or opening attachments from external sources.


Well I was just taking another look at Dave's photos before adding them to my "puzzlers" page, when I noticed the non-navy serial number on the RAS-5 tag. I'll bet two inflated dollars vs a non-inflated donut that Bob Peters K1JNN (SK) and Glen Zook K9STH (SK) are responsible for this particular RAS-5

https://puck.nether.net/pipermail/boatanchors/2001-July/009440.html
https://puck.nether.net/pipermail/boatanchors/2001-September/009782.html

https://obituaries.bangordailynews.com/obituary/robert-peters-804492711
https://www.forevermissed.com/glen-earl-zook/about

Nick England K4NYW
www.navy-radio.com<http://www.navy-radio.com/>


On Sat, Oct 14, 2023 at 1:17?AM David Stinson <arc5 at ix.netcom.com<mailto:arc5 at ix.netcom.com>> wrote:
Recently acquired this complete RAS receiver rack.
I've seen and have WWII-era U.S. Navy receivers
which were originally black wrinkle with the old
paint stripped, repainted with gray-to-blue-gray
untextured paint and with (if they are in
good condition) their nomenclature plates remounted.
This one has been stripped and professionally repainted,
but all the tags have been replaced with laminated paper.
Photos:

https://photos.app.goo.gl/EaaKdEHbp8TjbB6q6
https://photos.app.goo.gl/FqvN2dHAGfp3RtUG6
https://photos.app.goo.gl/tVGmeKfBXzo7v8Nc8
https://photos.app.goo.gl/LQnWky5njWgtvKtE7

Anyone seen this before?  What do you think?

TNX OM ES 73 DE Dave AB5S

--
This email has been checked for viruses by Avast antivirus software.
www.avast.com<http://www.avast.com/>
______________________________________________________________
Milsurplus mailing list
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From navy.radio at gmail.com  Sun Oct 15 15:18:56 2023
From: navy.radio at gmail.com (Nick England)
Date: Sun, 15 Oct 2023 15:18:56 -0400
Subject: [Milsurplus] RAS Noise Limiter
In-Reply-To: <DM8P220MB04729DDFBEDB07023594F017B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<1326527277.15896951.1697395356362@mail.yahoo.com>
	<DM8P220MB04729DDFBEDB07023594F017B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <CAB55hNfBk3txxeQBuDDwLZNojSoYsmQX+70x6SAFJVJynFMkjQ@mail.gmail.com>

RAS noise limiter CKB-50142 Manual -
https://www.navy-radio.com/rcvrs/ww2/ras/ras-limiter-man.pdf

I found this interesting info from the testimony of Hoffman's chief
engineer in a trial (Mission Bell changed its name to Hoffman)
(Testimony of Walter S. Harmon.)
"We had an item which was known as the noise peak limiter adapter. If we
want to speak of inventions or original design, that definitely was,
including constructing a complete unit which was conceived by us in its
entirety. The purpose of the equipment was to limit noise peaks on
communication receivers. The theory behind it was by certain circuit
configurations we could make the receiver respond to wave forms of pure
sine wave, which normal communications signals are. Noises are random wave
forms; by that I mean they are not a pure sine wave. I don't know whether
anybody knows what a pure sine wave is or not, but anyway, that is a wave
of uniform shape, whereas noise peaks are a random form. To put it plainly,
the idea was that you could not take a square block and put it through a
round hole.

Now, that is essentially what the noise peak limiter was. As I say, it was
originated by Hoffman Radio Corporation and submitted to the Navy
Department and subsequently ended up in a small production contract, I
believe the figure was 2280 units. [note - this is the correct figure for
the CKB-50142]

We also produced along that same line an electronic relay. Again the
purpose of the relay was to limit noise. That was adaptable only to
communication receivers, not receivers using voice frequencies, but rather
code frequencies or code signals, I should say. That was developed by us
and offered to the Navy Department as a new development. It was very
effective. Tests at the Naval Research Laboratory indicated that noise
reduction was in the order of 120 decibels. 120 decibels means that that
was a million to one ratio. In other words, to give the same amount of
sound from the receiver the noise had to be a million times stronger than
the desired signal, which for all practical purposes means there was no
noise, in that your ear could not differentiate between a million to one
ratio in sound. There was a great deal of pure development work went into
that device. It did fill a need.

The Navy Department first issued a development contract to produce 10 of
these units. I don't recall just where they were sent. I know of one unit
that was sent into the Alaskan area, where they were troubled with very
heavy static, another went into Honolulu, which was another noisy area, I
believe one went into Florida; the rest of the 10 I am not sure where they
went, but anyway they were shipped into areas where noise was a factor, and
the field tests showed that the instrument was very effective. I think
later that ended up in a production order for a redesigned unit. However,
it does not come into the period with which we are concerned.

On this noise peak limiter we also developed, as I recall, three different
types. One was made as an accessory for the Navy?I believe it was the RAS
receiver. Another one was made for the SX-28 receiver. Still another one
was made for the ARB. The purpose of all of them was the same, just a
matter of adapting them to receivers.

Now, that was an accessory that could be sent out into the field where they
had noise and they had a certain type of receiver. This adapter could be
plugged into the receiver, and it was very effective in reducing noise,
which means that communication was made possible in some cases where it
would not have been otherwise."
==============================
Nick England K4NYW
www.navy-radio.com


On Sun, Oct 15, 2023 at 3:01?PM Ray Fantini <RAFANTINI at salisbury.edu> wrote:

> RAB was one of the first super-heterodyne out there and a great example of
> what the newer technology as compared to TRF had to offer, but when the
> HRO, not as much the RAS but the regular HRO rolled out look what it had to
> offer, not only a super het but also crystal filter in the IF and a working
> AVC system that used tubes built around the idea of applied AVC.
>
> The RAS was somewhat like a HRO jr. without filter or S meter but there
> was the very mysterious Noise Limiter modification kit where you removed
> the detector AVC tube and stuffed that small assembly in the radio and it
> eliminated all the problems that the radio had with lightning burst and
> other high impulse noise. The mysterious thing is that no one can
> adequately explain how it works!
>
>
> Ray F/KA3EKH
> _._,_._,_
>
>
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From Kargo_cult at msn.com  Sun Oct 15 15:59:07 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Sun, 15 Oct 2023 19:59:07 +0000
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <CO6PR19MB5434391365444619E639BE5BE4D0A@CO6PR19MB5434.namprd19.prod.outlook.com>

If you look in the HRO it looks like a logical, well laid out city plan, there?s lots of real estate, and with no bandswitch, it?s a lot easier to troubleshoot also.
So if you don?t change frequencies much, ?band cruise?, it?s a good receiver for its use. I don?t know why the Germans ( KST ) copied it. They had
already a lot of interesting receivers, maybe not enough HF receivers though for their big project, conquer Europe. I don?t know if this is common knowledge,
but the bandspread coils of the KST cover frequencies other than the ham bands. Japan also copied the HRO idea, but without National?s dial. The HRO ?copy?
seems to have been pushing it, for Japan?s industry; that and a Super Pro copy ? even rarer ? are the most advanced WWII Japanese receivers i have seen.
-Hue Miller
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From Kargo_cult at msn.com  Sun Oct 15 16:12:56 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Sun, 15 Oct 2023 20:12:56 +0000
Subject: [Milsurplus] [ARC5] DAV/MAB Stuff for Trade.
In-Reply-To: <81624899-94a3-456b-8a48-01adee6be7a4@ix.netcom.com>
References: <81624899-94a3-456b-8a48-01adee6be7a4@ix.netcom.com>
Message-ID: <CO6PR19MB5434A44DBF53F90628C83817E4D0A@CO6PR19MB5434.namprd19.prod.outlook.com>

Dave, if you have an add-on DF whatever for the MAB, i ask you to document it with better photos. I didn't know about this and have not seen it documented anywhere.

I have a couple MAB with bag and antenna. I wish i had the vibe supply for them, but the fellow who operated them in the desert of Utah with the Explorer scouts 
apparently used dry batts. I wish i had bought more " BAG-1942" when Fair Radio still had them !  I am still undecided whether to sell mine, or to go ahead with the idea
to make plug in tube replacements. But i have way too many projects as is. 

I recall at an Oregon hamfest a mil vehicle enthusiast guy came up with an MAB field strength meter he had found. As he knows nothing about anything inside any electronic
box, and is the ultimate buy low - sell high guy, i was not particularly pleased seeing him buy this. So it goes, anyway. 
-Hue Miller 

From Kargo_cult at msn.com  Sun Oct 15 17:18:47 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Sun, 15 Oct 2023 21:18:47 +0000
Subject: [Milsurplus] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
Message-ID: <CO6PR19MB54340007671D1EF3EBAE5DABE4D0A@CO6PR19MB5434.namprd19.prod.outlook.com>

Really fine detective work, Nick. You really solved that one.
-Hue Miller 

From Kargo_cult at msn.com  Sun Oct 15 17:30:15 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Sun, 15 Oct 2023 21:30:15 +0000
Subject: [Milsurplus] [MMRCG] Navy RAS Receiver - Better Audio Fidelity?
In-Reply-To: <DM8P220MB04728B2662657D32F2B436F2B8D1A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<f2d640f5-104e-4f87-a481-e48e7c7127a7@ix.netcom.com>
	<90211682.364652.1697298315820@connect.xfinity.com>
	<DM8P220MB04728B2662657D32F2B436F2B8D1A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <CO6PR19MB54342FF0E6BC993B3A238F2AE4D0A@CO6PR19MB5434.namprd19.prod.outlook.com>

Ray, the meter on the power supply, is that original or added ?
-Hue Miller
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From RAFANTINI at salisbury.edu  Sun Oct 15 20:04:52 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Mon, 16 Oct 2023 00:04:52 +0000
Subject: [Milsurplus] RAS Noise Limiter
In-Reply-To: <CAB55hNfBk3txxeQBuDDwLZNojSoYsmQX+70x6SAFJVJynFMkjQ@mail.gmail.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<1326527277.15896951.1697395356362@mail.yahoo.com>
	<DM8P220MB04729DDFBEDB07023594F017B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CAB55hNfBk3txxeQBuDDwLZNojSoYsmQX+70x6SAFJVJynFMkjQ@mail.gmail.com>
Message-ID: <DM8P220MB047237416195C3058AD92D7FB8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

The coolest part is you just remove the existing detector AVC tube and stuff the adapter in its place, no other changes or modifications. No dual diodes or anything like any other noise limiter and it works!
Without it you were subject to huge loud noise pluses and that eliminated that problem.
I read the description and something about round pegs in square holes. And that is the only description I have ever seen. its magic.
The RAS has an audio output with a lot of headroom so it was a solution that was needed, you see the adapter occasionally on eBay but did not know they built a model for other receivers and never saw one or that system used anywhere else. probably because no one else understood it.
wonder if it would work in any other receivers?

Ray F/KA3EKH


________________________________
From: Nick England <navy.radio at gmail.com>
Sent: Sunday, October 15, 2023 3:18 PM
To: Ray Fantini <RAFANTINI at salisbury.edu>; MMRCG at groups.io <MMRCG at groups.io>; milsurplus at mailman.qth.net <milsurplus at mailman.qth.net>
Subject: RAS Noise Limiter


CAUTION: This email originated from outside of Salisbury University. Please exercise caution when clicking links or opening attachments from external sources.


RAS noise limiter CKB-50142 Manual -
https://www.navy-radio.com/rcvrs/ww2/ras/ras-limiter-man.pdf

I found this interesting info from the testimony of Hoffman's chief engineer in a trial (Mission Bell changed its name to Hoffman)
(Testimony of Walter S. Harmon.)
"We had an item which was known as the noise peak limiter adapter. If we want to speak of inventions or original design, that definitely was, including constructing a complete unit which was conceived by us in its entirety. The purpose of the equipment was to limit noise peaks on communication receivers. The theory behind it was by certain circuit configurations we could make the receiver respond to wave forms of pure sine wave, which normal communications signals are. Noises are random wave forms; by that I mean they are not a pure sine wave. I don't know whether anybody knows what a pure sine wave is or not, but anyway, that is a wave of uniform shape, whereas noise peaks are a random form. To put it plainly, the idea was that you could not take a square block and put it through a round hole.

Now, that is essentially what the noise peak limiter was. As I say, it was originated by Hoffman Radio Corporation and submitted to the Navy Department and subsequently ended up in a small production contract, I believe the figure was 2280 units. [note - this is the correct figure for the CKB-50142]

We also produced along that same line an electronic relay. Again the purpose of the relay was to limit noise. That was adaptable only to communication receivers, not receivers using voice frequencies, but rather code frequencies or code signals, I should say. That was developed by us and offered to the Navy Department as a new development. It was very effective. Tests at the Naval Research Laboratory indicated that noise reduction was in the order of 120 decibels. 120 decibels means that that was a million to one ratio. In other words, to give the same amount of sound from the receiver the noise had to be a million times stronger than the desired signal, which for all practical purposes means there was no noise, in that your ear could not differentiate between a million to one ratio in sound. There was a great deal of pure development work went into that device. It did fill a need.

The Navy Department first issued a development contract to produce 10 of these units. I don't recall just where they were sent. I know of one unit that was sent into the Alaskan area, where they were troubled with very heavy static, another went into Honolulu, which was another noisy area, I believe one went into Florida; the rest of the 10 I am not sure where they went, but anyway they were shipped into areas where noise was a factor, and the field tests showed that the instrument was very effective. I think later that ended up in a production order for a redesigned unit. However, it does not come into the period with which we are concerned.

On this noise peak limiter we also developed, as I recall, three different types. One was made as an accessory for the Navy?I believe it was the RAS receiver. Another one was made for the SX-28 receiver. Still another one was made for the ARB. The purpose of all of them was the same, just a matter of adapting them to receivers.

Now, that was an accessory that could be sent out into the field where they had noise and they had a certain type of receiver. This adapter could be plugged into the receiver, and it was very effective in reducing noise, which means that communication was made possible in some cases where it would not have been otherwise."

==============================
Nick England K4NYW
www.navy-radio.com<http://www.navy-radio.com/>


On Sun, Oct 15, 2023 at 3:01?PM Ray Fantini <RAFANTINI at salisbury.edu<mailto:RAFANTINI at salisbury.edu>> wrote:

RAB was one of the first super-heterodyne out there and a great example of what the newer technology as compared to TRF had to offer, but when the HRO, not as much the RAS but the regular HRO rolled out look what it had to offer, not only a super het but also crystal filter in the IF and a working AVC system that used tubes built around the idea of applied AVC.

The RAS was somewhat like a HRO jr. without filter or S meter but there was the very mysterious Noise Limiter modification kit where you removed the detector AVC tube and stuffed that small assembly in the radio and it eliminated all the problems that the radio had with lightning burst and other high impulse noise. The mysterious thing is that no one can adequately explain how it works!



Ray F/KA3EKH
_._,_._,_
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From Kargo_cult at msn.com  Sun Oct 15 23:37:43 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 16 Oct 2023 03:37:43 +0000
Subject: [Milsurplus] RAS Noise Limiter
In-Reply-To: <DM8P220MB047237416195C3058AD92D7FB8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<1326527277.15896951.1697395356362@mail.yahoo.com>
	<DM8P220MB04729DDFBEDB07023594F017B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CAB55hNfBk3txxeQBuDDwLZNojSoYsmQX+70x6SAFJVJynFMkjQ@mail.gmail.com>
	<DM8P220MB047237416195C3058AD92D7FB8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <CO6PR19MB5434BE90DF3613F922D81B95E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>

Well, that article says it was also developed, or at least tried, for the SX-28 and ARB receivers. ( That last one was a big surprise, but i suppose its application
was indeed a high noise environ. ) That article made me think about reading about 'noise limiters' and for once and all getting a good understanding of how
their components work. I already have the big picture. I am thinking Lamb noise limiter, TNS, and the McMurphy discriminator used in the ARR-15. 
-Hue Miller 

From Kargo_cult at msn.com  Sun Oct 15 23:40:11 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 16 Oct 2023 03:40:11 +0000
Subject: [Milsurplus] ARR-15 selectivity
Message-ID: <CO6PR19MB5434B8A9D14F1E373DC7CBE6E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>

Has anyone a good link to the article describing how to tighten up the ARR-15 selectivity ? It had to do with decreasing the IF coupling caps.
I mean RETAINING the variable IF, NOT using a 500 kHz mech filter.
NOT the silly audio filter thing mentioned in some silly conversion article.
I am also wondering how well this idea would work out on the ARC-2.
-Hue Miller
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From old_radio at aol.com  Mon Oct 16 00:45:54 2023
From: old_radio at aol.com (Jim Whartenby)
Date: Mon, 16 Oct 2023 04:45:54 +0000 (UTC)
Subject: [Milsurplus] ARR-15 selectivity
In-Reply-To: <CO6PR19MB5434B8A9D14F1E373DC7CBE6E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
References: <CO6PR19MB5434B8A9D14F1E373DC7CBE6E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
Message-ID: <1865743799.16013210.1697431554694@mail.yahoo.com>

HueEnclosed is what I did to narrow the IF bandwidth of the ARR-15.? Pretty easy to series connect identical value coupling caps to the original three caps to reduce the IF Bandwidth from about 15kc to 7.5kc or so.? Look it over and see if it makes any sense.
Removing the DC line to the Audio Filter will disable the narrow audio in the CW mode so SSB is now a snap to receive.? Just offset the BFO a few tics from the zero center.
I don't have an ARC-2 manual so not sure if the IF amplifier scheme is the same as the ARR-15.? If it is similar then there should be no problem to duplicate the above in the ARC-2.Regards,Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy 

    On Sunday, October 15, 2023 at 10:40:35 PM CDT, Hubert Miller <kargo_cult at msn.com> wrote:  
 
  
Has anyone a good link to the article describing how to tighten up the ARR-15 selectivity ? It had to do with decreasing the IF coupling caps.
 
I mean RETAINING the variable IF, NOT using a 500 kHz mech filter.
 
NOT the silly audio filter thing mentioned in some silly conversion article.
 
I am also wondering how well this idea would work out on the ARC-2.
 
-Hue Miller
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From arc5 at ix.netcom.com  Mon Oct 16 06:57:52 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Mon, 16 Oct 2023 05:57:52 -0500
Subject: [Milsurplus] ARR-15 selectivity
In-Reply-To: <1865743799.16013210.1697431554694@mail.yahoo.com>
References: <CO6PR19MB5434B8A9D14F1E373DC7CBE6E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
	<1865743799.16013210.1697431554694@mail.yahoo.com>
Message-ID: <1b3ca234-20fc-4734-a353-4fa19e09e2e6@ix.netcom.com>

Thanks for sharing this, Jim.
Look forward to trying the concept.

On 10/15/2023 11:45 PM, Jim Whartenby via Milsurplus wrote:
> Hue
> Enclosed is what I did to narrow the IF bandwidth of the ARR-15.? Pretty 
> easy to series connect identical value coupling caps to the original 
> three caps to reduce the IF Bandwidth from about 15kc to 7.5kc or so.  

-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com

From holden7471 at msn.com  Mon Oct 16 09:12:26 2023
From: holden7471 at msn.com (howard holden)
Date: Mon, 16 Oct 2023 13:12:26 +0000
Subject: [Milsurplus] CX Phone Fall 2023
Message-ID: <SJ0PR12MB68787A43F4A1D085F0D62B61C4D7A@SJ0PR12MB6878.namprd12.prod.outlook.com>

CX Phone Sunday Oct 22 1300Z to Oct 23 0700Z and Tuesday Oct 24 1300Z to Oct 25 0700Z

The CX is a no-pressure contest celebrating the older commercial and Home Brew equipment that was the pride and joy of ham shacks many decades ago. The object is to encourage restoration, operation and enjoyment of this older Classic equipment. You need not operate a Classic rig to participate in the CX. You may use any rig in the contest although new gear is a distinct scoring disadvantage as your multipliers are directly related to the age of the equipment you use! However, you can still work the "great ones" with modern equipment. There are two (2) entry categories per mode: ?Three or fewer receiver-transmitter pairs ?Four or more receiver-transmitter pairs.

Suggested CX Frequencies Khz(+/- QRM)
160M     80M       40M       20M       15M       10M       6M         2M
AM         1890       3860       7270       14280    21400    29000    50400    144300
SSB         1920       3840       7250       14260    21380    28600    50125    144200

DO NOT OPERATE SSB IN THE AM WINDOW (3.880 to 3.890 Mc).

Full details at: http://classicexchange.org/announcments/CX_Rules.pdf
Questions? Contact Mark K3MSB e-mail: myscupper at gmail.com<mailto:myscupper at gmail.com>
Or Ron K2RP e-mail: Ron k2rp at arrl.net<mailto:k2rp at arrl.net>
Or contact me!
73, Howie WB2AWQ/7
WB2AWQ at ARRL.net<mailto:WB2AWQ at ARRL.net>



Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows

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From RAFANTINI at salisbury.edu  Mon Oct 16 09:20:28 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Mon, 16 Oct 2023 13:20:28 +0000
Subject: [Milsurplus] More RAS fun!
Message-ID: <DM8P220MB0472AA36FDEF27B14B8FC42BB8D7A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Attached is a copy of the RAS schematic. This is one that I put together being for some weird reason everyone I have come across was poor quality or split on two or three pages. Couple of fun facts! The RF gain control is always in the circuit, regardless of AVC condition. With the exception of AVC first RF amplifier always runs wide open. B- is isolated by two 1K resistors above ground and used to provide a negative voltage for the AVC bus controlled by the tube between the BFO and Power supply and have no idea why they went thru a lot of trouble to provide a 600 Ohm output on the headphones but used the "Old School" approach of extending the plate and B+ to an external transformer located on the speaker panel? And unlike every other military receiver no provision for feeding audio out thru a 600 Ohm line.
There is a terminal that extend the B+ switch to the outside world that's used as a send receive switch. I have an external relay on my ARC-5 transmitter as part of the transmit receive function for the transmitter that controls that point but it results in the receiver B+ switch always being in the off position.


Ray F/KA3EKH
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From boeing377 at gmail.com  Mon Oct 16 10:37:35 2023
From: boeing377 at gmail.com (boeing377 at gmail.com)
Date: Mon, 16 Oct 2023 07:37:35 -0700
Subject: [Milsurplus] ARR-15 selectivity
In-Reply-To: <1b3ca234-20fc-4734-a353-4fa19e09e2e6@ix.netcom.com>
References: <CO6PR19MB5434B8A9D14F1E373DC7CBE6E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
	<1865743799.16013210.1697431554694@mail.yahoo.com>
	<1b3ca234-20fc-4734-a353-4fa19e09e2e6@ix.netcom.com>
Message-ID: <CAFZq+EzkEZoS71=8k+frcXiPv-Mk8yQSPnyoqox7V7DF1gQNKA@mail.gmail.com>

https://www.ebay.com/itm/195945409498?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=Fm63seX2S8y&sssrc=4429486&ssuid=52Dfc53eSkW&var=&widget_ver=artemis&media=COPY

Photo showing two ARR 15s on R3Y USN flying boat.

AF6IM

On Mon, Oct 16, 2023 at 3:56 AM David Stinson <arc5 at ix.netcom.com> wrote:

> Thanks for sharing this, Jim.
> Look forward to trying the concept.
>
> On 10/15/2023 11:45 PM, Jim Whartenby via Milsurplus wrote:
> > Hue
> > Enclosed is what I did to narrow the IF bandwidth of the ARR-15.  Pretty
> > easy to series connect identical value coupling caps to the original
> > three caps to reduce the IF Bandwidth from about 15kc to 7.5kc or so.
>
> --
> This email has been checked for viruses by Avast antivirus software.
> www.avast.com
> ______________________________________________________________
> Milsurplus mailing list
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From RAFANTINI at salisbury.edu  Mon Oct 16 15:15:03 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Mon, 16 Oct 2023 19:15:03 +0000
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <CA++10jQb4kCm6F_PUpK9AMNP-by_2GGgaJH86wHOx9AeEnBNzQ@mail.gmail.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQb4kCm6F_PUpK9AMNP-by_2GGgaJH86wHOx9AeEnBNzQ@mail.gmail.com>
Message-ID: <DM8P220MB0472D2DE88F50619AC0EA30CB8D7A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

The pre selectors are interesting, maybe they were used to try to eliminate the image issue of a low IF or maybe they just did the transition between the coax or what ever they used back then to the open wire feed on the RAS?
More pictures of RAS receiver in use during WW2, Albro Lake Receiving site outside of Nova Scotia, Ships entering Halifax Control obtained permission from  CFH on 425 Kc for CW or 1470 Kc for AM from Albro Lake, the receiving site and the transmitters were located at Newport Corner, Nova Scotia. They apparently had a CW link to Whitehall, England that relied on Marconi diversity receivers.
Don?t know any details about the transmitters at Newport Corner but apparently they were able to be  heard and read from Murmansk to the Falklands and half way around the world.
Web page at:

http://jproc.ca/rrp/albro_lake.html

About now everyone should be getting tired of me spouting off about the RAS.

Ray F/KA3EKH

From: Konrad Werzner <usstexasradio at gmail.com>
Sent: Sunday, October 15, 2023 3:22 PM
To: Ray Fantini <RAFANTINI at salisbury.edu>
Cc: David Stinson <arc5 at ix.netcom.com>; MMRCG at groups.io; Nick England <navy.radio at gmail.com>; milsurplus at mailman <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver



Ray,

Battleship Texas appears to have used the RAS (-2 version specifically) for a good amount of WWII service career. Here's a couple radio inventories documenting their installation. At one time there were 4 in service but later reduced to 3 with the 4th one kept in radio spares. Each had a CME-50063 (RME DB-20) preselector.

3 type RAS-2 were in Radio I until one was later replaced by an RBK receiver: https://www.navy-radio.com/ships/bb35/DSCN0826.jpg (A -5 is on the left and -2 on the right. Both are recent acquisitions. -5 was reconfigured by a ham that had it floor mounted...)

1 type RAS-2 in Radio II (Main Transmitter room) located next to an RAA receiver(fairly obsoleted already): https://www.navy-radio.com/ships/bb35/DSCN0802.jpg (A TBS is stored there temporarily but you can see the CME-50063 preselector cabinet)

There's also 4 pin sockets on the bulkhead that route to emergency batteries to run these receivers: https://www.navy-radio.com/ships/bb35/DSCN0826.jpg


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From Kargo_cult at msn.com  Mon Oct 16 15:43:33 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 16 Oct 2023 19:43:33 +0000
Subject: [Milsurplus] [ARC5] ARR-15 selectivity
In-Reply-To: <048b01da0066$a4b5c110$ee214330$@cox.net>
References: <CO6PR19MB5434B8A9D14F1E373DC7CBE6E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
	<048b01da0066$a4b5c110$ee214330$@cox.net>
Message-ID: <CO6PR19MB54348F4BC1411FD096EFAF94E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>

I like the 1 kHz dial readout with the variable IF. The Eddystone 830 series use a variable first IF to get the same accuracy  but in that case,
there's a second conversion to give selectivity. I think the "regenerative IF" thing is a pile of beans, as anyone who has ever used a Knight
or Hallicrafters receiver with that. Ditto following the variable IF on the ARC-2 with a Q5er. I am sort of thinking "a" method is to use a
2 terminal negative resistance stage connected right at the IF tuned circuit. 'Amateur Radio Techniques' by Pat Hawker many years ago
introduced that idea. BUT - you do have to find a space for a pot to control it - and that may be a problem - unless you maybe use an
outboard box.
-Hue Miller
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From Kargo_cult at msn.com  Mon Oct 16 15:53:07 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 16 Oct 2023 19:53:07 +0000
Subject: [Milsurplus] TBX-2 on Ebay
Message-ID: <CO6PR19MB543474B0E5463119149D9552E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>

A TBX opportunity on Ebay right now.
Only meters missing. Also, brains missing.
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From n4fs at eozinc.com  Mon Oct 16 16:08:50 2023
From: n4fs at eozinc.com (Mike Feher)
Date: Mon, 16 Oct 2023 16:08:50 -0400
Subject: [Milsurplus] TBX-2 on Ebay
In-Reply-To: <CO6PR19MB543474B0E5463119149D9552E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
References: <CO6PR19MB543474B0E5463119149D9552E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
Message-ID: <004f01da006c$94a1ca70$bde55f50$@eozinc.com>

Wow - I have three or four here that are nice and complete that I would sell
for that. Only thing is, it would be pick-up only. 73 - Mike 

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

848-245-9115

 

From: milsurplus-bounces at mailman.qth.net
<milsurplus-bounces at mailman.qth.net> On Behalf Of Hubert Miller
Sent: Monday, October 16, 2023 3:53 PM
To: milsurplus at mailman.qth.net
Subject: [Milsurplus] TBX-2 on Ebay

 

A TBX opportunity on Ebay right now. 
Only meters missing. Also, brains missing. 

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From usstexasradio at gmail.com  Mon Oct 16 16:14:12 2023
From: usstexasradio at gmail.com (Konrad Werzner)
Date: Mon, 16 Oct 2023 15:14:12 -0500
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <DM8P220MB0472D2DE88F50619AC0EA30CB8D7A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQb4kCm6F_PUpK9AMNP-by_2GGgaJH86wHOx9AeEnBNzQ@mail.gmail.com>
	<DM8P220MB0472D2DE88F50619AC0EA30CB8D7A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <CA++10jQQe-qhxf_-nJFUhSYUT=7TFG5kgkJX+=pBDFCca6ddRg@mail.gmail.com>

Ray,

>From Nick's CEMB database, looks like the preselectors were installed for
shipboard RAS to reduce oscillator radiation and improve sensitivity. See
attached. It also could provide an interface from coax to hard-line, but
still deciphering how that was done. The CN-49121 antenna cables are still
on the bulkhead but a standard CME-50063 does not have a coax connection.
Perhaps it was yard modified with a coax connector to the preselector.


On Mon, Oct 16, 2023, 14:15 Ray Fantini <RAFANTINI at salisbury.edu> wrote:

> The pre selectors are interesting, maybe they were used to try to
> eliminate the image issue of a low IF or maybe they just did the transition
> between the coax or what ever they used back then to the open wire feed on
> the RAS?
>
> More pictures of RAS receiver in use during WW2, Albro Lake Receiving site
> outside of Nova Scotia, Ships entering Halifax Control obtained permission
> from  CFH on 425 Kc for CW or 1470 Kc for AM from Albro Lake, the receiving
> site and the transmitters were located at Newport Corner, Nova Scotia. They
> apparently had a CW link to Whitehall, England that relied on Marconi
> diversity receivers.
>
> Don?t know any details about the transmitters at Newport Corner but
> apparently they were able to be  heard and read from Murmansk to the
> Falklands and half way around the world.
>
> Web page at:
>
>
>
> http://jproc.ca/rrp/albro_lake.html
>
>
>
> About now everyone should be getting tired of me spouting off about the
> RAS.
>
>
>
> Ray F/KA3EKH
>
>
>
> *From:* Konrad Werzner <usstexasradio at gmail.com>
> *Sent:* Sunday, October 15, 2023 3:22 PM
> *To:* Ray Fantini <RAFANTINI at salisbury.edu>
> *Cc:* David Stinson <arc5 at ix.netcom.com>; MMRCG at groups.io; Nick England <
> navy.radio at gmail.com>; milsurplus at mailman <milsurplus at mailman.qth.net>
> *Subject:* Re: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
>
>
>
>
>
>
>
> Ray,
>
>
>
> Battleship Texas appears to have used the RAS (-2 version specifically)
> for a good amount of WWII service career. Here's a couple radio inventories
> documenting their installation. At one time there were 4 in service but
> later reduced to 3 with the 4th one kept in radio spares. Each had a
> CME-50063 (RME DB-20) preselector.
>
>
>
> 3 type RAS-2 were in Radio I until one was later replaced by an RBK
> receiver: https://www.navy-radio.com/ships/bb35/DSCN0826.jpg (A -5 is on
> the left and -2 on the right. Both are recent acquisitions. -5 was
> reconfigured by a ham that had it floor mounted...)
>
>
>
> 1 type RAS-2 in Radio II (Main Transmitter room) located next to an RAA
> receiver(fairly obsoleted already):
> https://www.navy-radio.com/ships/bb35/DSCN0802.jpg (A TBS is stored there
> temporarily but you can see the CME-50063 preselector cabinet)
>
>
>
> There's also 4 pin sockets on the bulkhead that route to emergency
> batteries to run these receivers:
> https://www.navy-radio.com/ships/bb35/DSCN0826.jpg
>
>
>
>
>
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From Kargo_cult at msn.com  Mon Oct 16 16:23:09 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 16 Oct 2023 20:23:09 +0000
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <CA++10jQQe-qhxf_-nJFUhSYUT=7TFG5kgkJX+=pBDFCca6ddRg@mail.gmail.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQb4kCm6F_PUpK9AMNP-by_2GGgaJH86wHOx9AeEnBNzQ@mail.gmail.com>
	<DM8P220MB0472D2DE88F50619AC0EA30CB8D7A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQQe-qhxf_-nJFUhSYUT=7TFG5kgkJX+=pBDFCca6ddRg@mail.gmail.com>
Message-ID: <CO6PR19MB5434647C6CBF63261CD49F43E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>

I think that WWII  airfield tower manual from Bremerton, WA, i sent Nick a while back shows tower receivers as RAS.
This kinda surprised me, and i thought, like you probably do, "Why didn't they use something better / more expensive ?"
Well, it worked.

Ray, no we ( at least I ) don't get tired of chewing the RAS topic. Hey, that's what this medium is for.
-Hue Miller 

From Kargo_cult at msn.com  Mon Oct 16 16:27:19 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 16 Oct 2023 20:27:19 +0000
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <CA++10jQQe-qhxf_-nJFUhSYUT=7TFG5kgkJX+=pBDFCca6ddRg@mail.gmail.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQb4kCm6F_PUpK9AMNP-by_2GGgaJH86wHOx9AeEnBNzQ@mail.gmail.com>
	<DM8P220MB0472D2DE88F50619AC0EA30CB8D7A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQQe-qhxf_-nJFUhSYUT=7TFG5kgkJX+=pBDFCca6ddRg@mail.gmail.com>
Message-ID: <CO6PR19MB5434C6503C92D771C08AFCFDE4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>

I don't think any WWII era ship used coax for HF. 
Or, what am i missing?
So is there a coax - single wire conversion needed? 
-Hue Miller 

From Kargo_cult at msn.com  Mon Oct 16 16:32:55 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 16 Oct 2023 20:32:55 +0000
Subject: [Milsurplus] Tankie - Talkie
Message-ID: <CO6PR19MB543421C5B50F775AA2D84B56E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>

A Quora topic recently digressed ( normal ) and i mentioned the 'Tankie - Talkie'.  There's a video you can see on Youtube, i
think Solomon Islands, where a foot soldier is walking behind an M-4 and holding a phone ( attached by cable to back of tank. )
I recall seeing this tank phone listed in one of Fair's old catalogs. I suppose the phone would have to have some kind of signal
light to indicate "call waiting", that is, someone picked up the phone from the tank's phone box. Anyone know more about this
circuit ?
Yes, i wondered, why tankie-talkie when there was SCR-300 for the troops and VRC-3 on tanks in the Pacific War. Probably as
back-up or insurance.
-Hue Miller
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From holden7471 at msn.com  Mon Oct 16 16:38:01 2023
From: holden7471 at msn.com (howard holden)
Date: Mon, 16 Oct 2023 20:38:01 +0000
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <CO6PR19MB5434C6503C92D771C08AFCFDE4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQb4kCm6F_PUpK9AMNP-by_2GGgaJH86wHOx9AeEnBNzQ@mail.gmail.com>
	<DM8P220MB0472D2DE88F50619AC0EA30CB8D7A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQQe-qhxf_-nJFUhSYUT=7TFG5kgkJX+=pBDFCca6ddRg@mail.gmail.com>
	<CO6PR19MB5434C6503C92D771C08AFCFDE4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
Message-ID: <SJ0PR12MB6878075A773D3F1670C3C2C6C4D7A@SJ0PR12MB6878.namprd12.prod.outlook.com>

Very specifically, submarines used coax cables. Don?t recall other ships using, but I can?t imagine why not. Coax was invented in 1929 I think.

Howie WB2AWQ

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows

From: Hubert Miller<mailto:Kargo_cult at msn.com>
Sent: Monday, October 16, 2023 1:27 PM
To: milsurplus at mailman<mailto:milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver

I don't think any WWII era ship used coax for HF.
Or, what am i missing?
So is there a coax - single wire conversion needed?
-Hue Miller
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From Kargo_cult at msn.com  Mon Oct 16 16:52:04 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 16 Oct 2023 20:52:04 +0000
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <SJ0PR12MB6878075A773D3F1670C3C2C6C4D7A@SJ0PR12MB6878.namprd12.prod.outlook.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQb4kCm6F_PUpK9AMNP-by_2GGgaJH86wHOx9AeEnBNzQ@mail.gmail.com>
	<DM8P220MB0472D2DE88F50619AC0EA30CB8D7A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQQe-qhxf_-nJFUhSYUT=7TFG5kgkJX+=pBDFCca6ddRg@mail.gmail.com>
	<CO6PR19MB5434C6503C92D771C08AFCFDE4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
	<SJ0PR12MB6878075A773D3F1670C3C2C6C4D7A@SJ0PR12MB6878.namprd12.prod.outlook.com>
Message-ID: <CO6PR19MB5434943F38909D2FEB6AECB1E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>

I was thinking of the wide range of comm frequencies used. I don't think there were any remoted antenna tuners
then, that would interface coax to a wire antenna.
-Hue
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From Kargo_cult at msn.com  Mon Oct 16 17:39:34 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 16 Oct 2023 21:39:34 +0000
Subject: [Milsurplus] Remembering 'Radio Swan'
Message-ID: <CO6PR19MB5434A6621983F51E8E1E4E72E4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>

I decided to go thru my books and get rid of ones i don't really need. Was casting an eye on 'The Bay of Pigs', Haynes Johnson, 1964. I decided to look up some on
Radio Swan. I read up some on the story at "  w2xq.com/qsl-swan-island-radio-swan.html "
A warning comes up that this site is insecure, certificate has expired, but i went ahead, no problem.
This book i have, i think i'll just scan some pages relevant to Radio Swan broadcasts and then donate it.
I recall i had a QSL from Radio Swan. It had a note written next to the signer's signature, "6100 kcs is too far off for a QSL from me."  I was using a Lafayette radio with
not good dial markings. Years later, in a mistaken purge, i threw out all my QSLs. But a few years after that, i was at a collectible paper shop in Seatte ( try to find such
shop today ), and i bought a Radio Swan QSL, as a replacement, but of course without the "personal note".

I recall at lunch, when i was in junior high school, i was reading the Seattle Times about the invasion, and it said the insurgents would have an update radio communique
broadcast on 7000 kcs. I knew very little about radio in those days, but i knew enough to know this was on the edge of a hamband, and i wondered how that could be.
I don't think my memory is mistaken, and i have remembered it after all these years.

I also recall reading, this sometime in the late 1970s, some kind of religious cult's newspaper thing about some U.S. agent who had worked in Cuba. I have no idea
now how that topic was relevant to that cult's literature. In the article the author mentioned using some kind of radio that "squished" the audio message down in
time, compressed it in time for a shorter transmit time.
-Hue Miller

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From old_radio at aol.com  Mon Oct 16 17:46:17 2023
From: old_radio at aol.com (Jim Whartenby)
Date: Mon, 16 Oct 2023 21:46:17 +0000 (UTC)
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <SJ0PR12MB6878075A773D3F1670C3C2C6C4D7A@SJ0PR12MB6878.namprd12.prod.outlook.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQb4kCm6F_PUpK9AMNP-by_2GGgaJH86wHOx9AeEnBNzQ@mail.gmail.com>
	<DM8P220MB0472D2DE88F50619AC0EA30CB8D7A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQQe-qhxf_-nJFUhSYUT=7TFG5kgkJX+=pBDFCca6ddRg@mail.gmail.com>
	<CO6PR19MB5434C6503C92D771C08AFCFDE4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
	<SJ0PR12MB6878075A773D3F1670C3C2C6C4D7A@SJ0PR12MB6878.namprd12.prod.outlook.com>
Message-ID: <668706072.10894535.1697492777099@mail.yahoo.com>

I believe coaxial cable was invented some 50 years earlier (1880) by Oliver Heaviside who also held the original patent.? His biography is worth a look, talk about being ahead of your time!Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy 

     On Monday, October 16, 2023 at 03:38:17 PM CDT, howard holden <holden7471 at msn.com> wrote:  
 
 
Very specifically, submarines used coax cables. Don?t recall other ships using, but I can?t imagine why not. Coax was invented in 1929 I think.

 ?
 
Howie WB2AWQ

 ?
 
Sent from Mail for Windows

 ?
 
From: Hubert Miller
Sent: Monday, October 16, 2023 1:27 PM
To: milsurplus at mailman
Subject: Re: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver

 ?
 
I don't think any WWII era ship used coax for HF. 
Or, what am i missing?
So is there a coax - single wire conversion needed? 
-Hue Miller 
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From RAFANTINI at salisbury.edu  Wed Oct 18 09:52:23 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Wed, 18 Oct 2023 13:52:23 +0000
Subject: [Milsurplus] Able Archer 83 this Saturday
Message-ID: <DM8P220MB047229F73681E2FAD72DBF9FB8D5A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

The War Wagon AKA M151 self-propelled GRC-106 is ready to go for this weekend's Able Archer 83 event. Just a reminder that we will be getting together at Supply Depo X-Ray just outside Smyrna Delaware. All are invited to attend, with or without equipment because we will have radios on site but due to security reasons we do not want to publish the address directly on the internet but if you would like to attender and operate during the event send me a email directly and all details will be provided.
Able Archer 83 web page:

https://sites.google.com/site/ablearcher1983w3a

Ray F/KA3EKH


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From w4ax.mack at gmail.com  Wed Oct 18 19:00:36 2023
From: w4ax.mack at gmail.com (Mack McCormick)
Date: Wed, 18 Oct 2023 19:00:36 -0400
Subject: [Milsurplus] Wanted: BC-610 India mod transformer
Message-ID: <CAFzyUt63vpaATZXPyDdOP6ufcj+noeZuLHSvSzoDsD2jAGFEwQ@mail.gmail.com>

The mod transformer is the sealed rectangular one typically made by Chicago
Transformer.

Please let me know if you have one for sale. W4AX.mack at gmail.com.

Thanks in advance.

Mack
W4AX
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From taigh at twinbeech.com  Thu Oct 19 20:25:10 2023
From: taigh at twinbeech.com (taigh at twinbeech.com)
Date: Thu, 19 Oct 2023 17:25:10 -0700
Subject: [Milsurplus] NAF 38610 WWII Navy headsets needed
Message-ID: <05e101da02eb$e4c58150$ae5083f0$@twinbeech.com>

Would any of you fine folks happen to have any extra NAF38610 headsets to
donate or sell to the PBY-5 project? This is the most historic PBY from WWII
as she sank three U boats including the first one sank by any PBY.

 

I am helping with the restoration and they are putting all of the original
equipment that she had including very early RADAR and comm gear. She used 9
of these headsets but we are happy with whatever we can get.

 

Photos of the headset attached and below.

 

Thanks for any help and leads,

 

Taigh

 

Taigh Ramey

Vintage Aircraft Inc.

7432 C.E.Dixon Street

Stockton, California 95206

(209) 982-0273

(209) 982-4832 Fax

 <http://www.twinbeech.com/> www.twinbeech.com

KEEP 'EM FLYING...FOR HISTORY!

 



 

 



-- 
This email has been checked for viruses by AVG antivirus software.
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From mjcal77 at yahoo.com  Thu Oct 19 21:59:07 2023
From: mjcal77 at yahoo.com (CL in NC)
Date: Fri, 20 Oct 2023 01:59:07 +0000 (UTC)
Subject: [Milsurplus] Forgivness Requested
References: <692132191.78334.1697767147574.ref@mail.yahoo.com>
Message-ID: <692132191.78334.1697767147574@mail.yahoo.com>

Sort of in the same boat as I have promised to post a list of the milsurp I have and want to get rid of, but have just not gotten around to it.  A fellow out of FLA came up and got a couple things and I promised to get back with him, but have since lost his email.  I had a 120+ year old hemlock fall on my house a while back that put the brakes on any radio stuff.

Charlie in NC

From Kargo_cult at msn.com  Thu Oct 19 23:08:48 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Fri, 20 Oct 2023 03:08:48 +0000
Subject: [Milsurplus] RU receiver question
In-Reply-To: <05e101da02eb$e4c58150$ae5083f0$@twinbeech.com>
References: <05e101da02eb$e4c58150$ae5083f0$@twinbeech.com>
Message-ID: <CO6PR19MB5434084CE86B035587AE536DE4DBA@CO6PR19MB5434.namprd19.prod.outlook.com>

Nice photo posted by Taigh. 
But my question about the RU, for people who have actually used it: is the selectivity, on CW, effectively much better
than on AM ? On AM mode, it seems to me pretty useless. I mean, 3 tuned circuits at say, the Army air-ground freq
of 4495 ? 3 tuned circuits at 5 MHz? That's okay for the front end of a synchronous detector WWV receiver or a 
bandpass in front of some other selectivity device. 
I know it's not a product detector, and the beat note is in the audio range. I am still puzzled and perplexed how this
little selectivity can be practical at HF.
BTW, i think there's only one other military aircraft straight TRF receiver used during the war, and that was the FuG ?
( 4 ? ) used in the Stuka dive bomber. Japan's aircraft radios were often not up to much of a job, but they used no
TRFs. ( I do not count the UK TR-9 as a "straight TRF". )
AND years ago i asked Pete Peterson, of Seattle, who flew in this exact position in the photo, and he just answered me, 
"Well, i thought it was a pretty good receiver", which left me puzzled still. 
I still have several RU. I suppose i should just power one up, circumvent the AGC so i can skip the negative bias voltage,
and find out for myself. 
-Hue Miller 

From arc5 at ix.netcom.com  Fri Oct 20 07:03:19 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Fri, 20 Oct 2023 06:03:19 -0500
Subject: [Milsurplus] [ARC5] RU receiver question
In-Reply-To: <CO6PR19MB5434084CE86B035587AE536DE4DBA@CO6PR19MB5434.namprd19.prod.outlook.com>
References: <05e101da02eb$e4c58150$ae5083f0$@twinbeech.com>
	<CO6PR19MB5434084CE86B035587AE536DE4DBA@CO6PR19MB5434.namprd19.prod.outlook.com>
Message-ID: <e37b0ae4-7a85-4bb2-b086-2a07af8d1804@ix.netcom.com>

On 10/19/2023 10:08 PM, Hubert Miller wrote:
 > Nice photo posted by Taigh.
 > But my question about the RU, for people who have actually used it: 
is the selectivity, on CW, effectively much better
 > than on AM ? On AM mode, it seems to me pretty useless.

I have used my GF/RU on our local weekly AM net on 3890
Saturday mornings.  The key is to accept and work within
the limitations of an antique rig, just as one would
accept and work within the limitations of a 1920s-30s
automobile.  Were there no challenge, there would be
no achievement.

That being said, one can, with some fiddling,
use front-end regeneration to sharpen things
up considerably:

Regen pulls weak AM signal out:
https://www.youtube.com/shorts/aB5t6R1MitU

Regen separates between 3890 and 3885.
https://www.youtube.com/shorts/ioOgaH9jnuQ

This works for a receiver you're going to use
for 3870 to 3890; it's not a solution if one
wishes to use the RU for band cruising; it
has to be re-adjusted for big frequency moves.

Details if anyone wants them.

GL OM DE Dave AB5S







-- 
This email has been checked for viruses by Avast antivirus software.
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From arc5 at ix.netcom.com  Fri Oct 20 07:21:39 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Fri, 20 Oct 2023 06:21:39 -0500
Subject: [Milsurplus] [ARC5] RU receiver question
In-Reply-To: <e37b0ae4-7a85-4bb2-b086-2a07af8d1804@ix.netcom.com>
References: <05e101da02eb$e4c58150$ae5083f0$@twinbeech.com>
	<CO6PR19MB5434084CE86B035587AE536DE4DBA@CO6PR19MB5434.namprd19.prod.outlook.com>
	<e37b0ae4-7a85-4bb2-b086-2a07af8d1804@ix.netcom.com>
Message-ID: <6b53884e-23e5-46c0-9359-2d487f0f3c29@ix.netcom.com>

Well fooie.
That video was of the SCR-183 receiver,
but the RU would work about the same.

On 10/20/2023 6:03 AM, David Stinson wrote:

> I have used my GF/RU on our 
>local weekly AM net on 3890
> Saturday mornings.

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This email has been checked for viruses by Avast antivirus software.
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From RAFANTINI at salisbury.edu  Fri Oct 20 09:51:35 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Fri, 20 Oct 2023 13:51:35 +0000
Subject: [Milsurplus] W3A on air soon
Message-ID: <DM8P220MB0472420F3DFB5727962C927CB8DBA@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

As part of the annual Able Archer 83 event W3A (whiskey Three Alpha) will be on the air again tomorrow. Although the event officially starts at noon on Saturday I will be on the air from the site using W3A for the 7087 RATT Net. 850 Hz shift 45.5 (60 wpm) at 0900 (EST) with an alternate frequency of 7089 if there is traffic on 7087
Will Also plan on MMRCG 7296 USB at 1000 after the RATT Net using W3A, hopefully being in Delaware and away from my local interference on sixty will be on the MRCA Moose & Squirrel Net on 5357 at noon for the official start of the AA83 exercise.
There will also be another attempt at the Cross Country QSO, military to military radio on seventeen meters, 18.145 USB there or about between 1500 to 1600 local.

W3A will be on the air for twenty four hours until Sunday at noon, look for us on twenty and forty.

Ray F/KA3EKH
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From kgordon2006 at frontier.com  Fri Oct 20 12:21:44 2023
From: kgordon2006 at frontier.com (Ken)
Date: Fri, 20 Oct 2023 09:21:44 -0700
Subject: [Milsurplus] [ARC5] RU receiver question
Message-ID: <293894369.935707.1697818256390@frontier.com>

Well, although I have never, yet, used an RU, I DID use an RAL-7 as my main and only station receiver for some 12 years.I believe the circuitry is very similar: a 6 tube TRF: 2 RF amp stages, a regenerative detector, 2 stages of audio, and an "AVC" (a limiter).The RAL-7 was designed by RCA. It covers from 300 kHz through 23 MHz.I never had any trouble separating AM, CW, or SSB stations with it. The user simply has to learn how to use the regeneration control.I really liked the receiver. For one thing, it has this "transparent" sound: there didn't seem like there was much between you and the signals on the band.?Ken W7EKBSent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
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From jpwatkins9 at gmail.com  Fri Oct 20 12:53:26 2023
From: jpwatkins9 at gmail.com (John Watkins)
Date: Fri, 20 Oct 2023 11:53:26 -0500
Subject: [Milsurplus] HP 410 AND 410 C ac probes
Message-ID: <CAEuLR7=3k7VU-_FT307GbHmpDCQ017eJH_P_9Q6Ps7YyFc1jFA@mail.gmail.com>

 While searching for parts for my Hallicrafters S-20R, ran into these HP
410 AC probes.  Both have the diode in them, are complete, and have cables
and plug.  $15 plus $11 usps flat rate postage.

John WD5ENU
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From holden7471 at msn.com  Fri Oct 20 14:12:01 2023
From: holden7471 at msn.com (howard holden)
Date: Fri, 20 Oct 2023 18:12:01 +0000
Subject: [Milsurplus] [ARC5]   RU receiver question
In-Reply-To: <293894369.935707.1697818256390@frontier.com>
References: <293894369.935707.1697818256390@frontier.com>
Message-ID: <SJ0PR12MB6878A6B64D7CEEA9D6A82422C4DBA@SJ0PR12MB6878.namprd12.prod.outlook.com>

Agreed with Ken on the RAL. I used one at the USS Ling for some 10 years. An amazing receiver for one designed in the 30s, and even SSB is easy to copy on it. CW is a snap. Crisp, clean, and pretty easy to separate signals. My impression is you ?drive? an RAL. How you drive it says a lot.

Howie WB2AWQ Reno NV

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows

From: Ken<mailto:kgordon2006 at frontier.com>
Sent: Friday, October 20, 2023 9:11 AM
To: David Stinson<mailto:arc5 at ix.netcom.com>; Hubert Miller<mailto:Kargo_cult at msn.com>; 'ARC-5'<mailto:arc5 at mailman.qth.net>; milsurplus at mailman.qth.net<mailto:milsurplus at mailman.qth.net>
Subject: Re: [ARC5] [Milsurplus] RU receiver question

Well, although I have never, yet, used an RU, I DID use an RAL-7 as my main and only station receiver for some 12 years.

I believe the circuitry is very similar: a 6 tube TRF: 2 RF amp stages, a regenerative detector, 2 stages of audio, and an "AVC" (a limiter).

The RAL-7 was designed by RCA. It covers from 300 kHz through 23 MHz.

I never had any trouble separating AM, CW, or SSB stations with it. The user simply has to learn how to use the regeneration control.

I really liked the receiver. For one thing, it has this "transparent" sound: there didn't seem like there was much between you and the signals on the band.

Ken W7EKB


Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone



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From taigh at twinbeech.com  Fri Oct 20 14:14:02 2023
From: taigh at twinbeech.com (taigh at twinbeech.com)
Date: Fri, 20 Oct 2023 11:14:02 -0700
Subject: [Milsurplus] PBY-5A BuNo 2459 radio and radar
Message-ID: <06bc01da0381$36089e90$a219dbb0$@twinbeech.com>

The photo below is the exact radio compliment for the Collings PBY-5A Bureau
Number 2459. 

 

Should you all have any of the gear shown in this photo and would like it to
go to a worthy project please let me know. A few coil sets needed! There are
two RU's for the GO-9 and one RU/GF for the pilots called the intra squadron
set.

 

We have one full RU, NOS in the boxes from eBay a while ago. Two more to go.


 

Anyone have a DW-1 direction finding set or something close? Photo attached.

 

Also attached are some recent shots showing the newly made radar arrays and
paint.

 

Casey and his crew at American Aero are doing a great job for sure.

 

Thanks,

 

Taigh

 

Taigh Ramey

Vintage Aircraft Inc.

7432 C.E.Dixon Street

Stockton, California 95206

(209) 982-0273

(209) 982-4832 Fax

 <http://www.twinbeech.com/> www.twinbeech.com

KEEP 'EM FLYING...FOR HISTORY!

 



 

From: taigh at twinbeech.com <taigh at twinbeech.com> 
Sent: Thursday, October 19, 2023 5:25 PM
To: 'ARC-5' <arc5 at mailman.qth.net>
Cc: 'milsurplus-bounces at mailman.qth.net'
<milsurplus-bounces at mailman.qth.net>; 'milsurplus at mailman.qth.net'
<milsurplus at mailman.qth.net>
Subject: NAF 38610 WWII Navy headsets needed

 

Would any of you fine folks happen to have any extra NAF38610 headsets to
donate or sell to the PBY-5 project? This is the most historic PBY from WWII
as she sank three U boats including the first one sank by any PBY.

 

I am helping with the restoration and they are putting all of the original
equipment that she had including very early RADAR and comm gear. She used 9
of these headsets but we are happy with whatever we can get.

 

Photos of the headset attached and below.

 

Thanks for any help and leads,

 

Taigh

 

Taigh Ramey

Vintage Aircraft Inc.

7432 C.E.Dixon Street

Stockton, California 95206

(209) 982-0273

(209) 982-4832 Fax

 <http://www.twinbeech.com/> www.twinbeech.com

KEEP 'EM FLYING...FOR HISTORY!

 



 

 



-- 
This email has been checked for viruses by AVG antivirus software.
www.avg.com
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From rdesilva at jps.net  Fri Oct 20 14:32:33 2023
From: rdesilva at jps.net (Ron De Silva)
Date: Fri, 20 Oct 2023 11:32:33 -0700
Subject: [Milsurplus] [ARC5] RU receiver question
In-Reply-To: <SJ0PR12MB6878A6B64D7CEEA9D6A82422C4DBA@SJ0PR12MB6878.namprd12.prod.outlook.com>
References: <293894369.935707.1697818256390@frontier.com>
	<SJ0PR12MB6878A6B64D7CEEA9D6A82422C4DBA@SJ0PR12MB6878.namprd12.prod.outlook.com>
Message-ID: <CAE7jS=20bqGPT32B7k83zUurODz=mHp+EZF_NQ9Gn4_8aShnaw@mail.gmail.com>

My experience with the restored RAL is similar.

As you say...there seems to be nothing between the signal and you.

So much more pleasing to hear cw on than my DSP filtered radios.

And yes....driving the Regen,gain ,vernier tune to get the "sound" your
ears like.

Paired up with the TDE transmitter , the TDE/RAL  have racked up several EU
and many Asia/ Indonesia contacts on both 40 and 20 meters the last two
years.

Antennas nothing more than 160 ft longwire or 10ft diam. magnetic loop.

The basic function of generating a carrier and detecting that carrier in
its elemental form.The end to end transfer of messages accomplished just as
well as much more sophisticated modern devices.

Ron
NU6F

On Fri, Oct 20, 2023, 11:12 AM howard holden <holden7471 at msn.com> wrote:

> Agreed with Ken on the RAL. I used one at the USS Ling for some 10 years.
> An amazing receiver for one designed in the 30s, and even SSB is easy to
> copy on it. CW is a snap. Crisp, clean, and pretty easy to separate
> signals. My impression is you ?drive? an RAL. How you drive it says a lot.
>
>
>
> Howie WB2AWQ Reno NV
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows
>
>
>
> *From: *Ken <kgordon2006 at frontier.com>
> *Sent: *Friday, October 20, 2023 9:11 AM
> *To: *David Stinson <arc5 at ix.netcom.com>; Hubert Miller
> <Kargo_cult at msn.com>; 'ARC-5' <arc5 at mailman.qth.net>;
> milsurplus at mailman.qth.net
> *Subject: *Re: [ARC5] [Milsurplus] RU receiver question
>
>
>
> Well, although I have never, yet, used an RU, I DID use an RAL-7 as my
> main and only station receiver for some 12 years.
>
>
>
> I believe the circuitry is very similar: a 6 tube TRF: 2 RF amp stages, a
> regenerative detector, 2 stages of audio, and an "AVC" (a limiter).
>
>
>
> The RAL-7 was designed by RCA. It covers from 300 kHz through 23 MHz.
>
>
>
> I never had any trouble separating AM, CW, or SSB stations with it. The
> user simply has to learn how to use the regeneration control.
>
>
>
> I really liked the receiver. For one thing, it has this "transparent"
> sound: there didn't seem like there was much between you and the signals on
> the band.
>
>
>
> Ken W7EKB
>
>
>
>
>
> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
>
>
>
>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From Kargo_cult at msn.com  Fri Oct 20 16:14:54 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Fri, 20 Oct 2023 20:14:54 +0000
Subject: [Milsurplus] [ARC5] RU receiver question
In-Reply-To: <e37b0ae4-7a85-4bb2-b086-2a07af8d1804@ix.netcom.com>
References: <05e101da02eb$e4c58150$ae5083f0$@twinbeech.com>
	<CO6PR19MB5434084CE86B035587AE536DE4DBA@CO6PR19MB5434.namprd19.prod.outlook.com>
	<e37b0ae4-7a85-4bb2-b086-2a07af8d1804@ix.netcom.com>
Message-ID: <SN4PR19MB54394BBA5C9F1F8A32B27ADFE4DBA@SN4PR19MB5439.namprd19.prod.outlook.com>

Dave's trick with the SCR-183: well, that's one way to do it, and it gets the job done.
But my puzzlement is how the original RU, SCR-183 worked in some environment, like the airfield surround,
where you might have a number of signals going on. 3,4 tuned circuits at 5 MHz are like a crystal radio selectivity
on broadcast band. 
The RAL or other regen, with a tuned circuit Q of 1500 up, are not comparable at all to the stock RU !
Well, i guess i'll have to keep one RU and power it up, find out for my own satisfaction how it does. 
-Hue 

From k4oq.radio at gmail.com  Fri Oct 20 18:06:54 2023
From: k4oq.radio at gmail.com (Mahlon Haunschild)
Date: Fri, 20 Oct 2023 17:06:54 -0500
Subject: [Milsurplus] HP 410 AND 410 C ac probes
Message-ID: <95F92636-5558-488F-89AB-7FC7D39A1D68@gmail.com>

John

Please send photos, if they are as you described them I will take them.

Best regards

Mahlon - N4ZK

From Kargo_cult at msn.com  Fri Oct 20 18:26:26 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Fri, 20 Oct 2023 22:26:26 +0000
Subject: [Milsurplus] [ARC5] PBY-5A BuNo 2459 radio and radar
In-Reply-To: <06bc01da0381$36089e90$a219dbb0$@twinbeech.com>
References: <06bc01da0381$36089e90$a219dbb0$@twinbeech.com>
Message-ID: <SN4PR19MB5439FD62AE1787B5313E5BFBE4DBA@SN4PR19MB5439.namprd19.prod.outlook.com>

You sure that's a DW ? The DW i had, has a L O N G neck. In fact, for just using it around the home, the long neck was something to be concerned about,
it was kind of top heavy and felt like mechanically a problem.
-Hue Miller
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From n3bjdx at gmail.com  Fri Oct 20 19:31:50 2023
From: n3bjdx at gmail.com (Alan Fryer)
Date: Fri, 20 Oct 2023 19:31:50 -0400
Subject: [Milsurplus] WTB: RAL Receiver
Message-ID: <CAEkeX1ZRM4jBn2XaK+AQd_i29oAsjngKUX3V0UQemTKASyOrHQ@mail.gmail.com>

Looking for an RAL Receiver in working condition or untested/as-is if it is
intact.  Will pick up within 200 miles of Roanoke, VA or at Lawrenceville
or Benson hamfests.  Power supply not required but welcomed. Pick up at one
of the hamfests next spring OK, too !

Please let me know if you have one that is surplus to your needs.

Alan, N3BJ
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From mjcal77 at yahoo.com  Fri Oct 20 20:04:33 2023
From: mjcal77 at yahoo.com (CL in NC)
Date: Sat, 21 Oct 2023 00:04:33 +0000 (UTC)
Subject: [Milsurplus] RAK-RAL
References: <2024197151.318505.1697846673492.ref@mail.yahoo.com>
Message-ID: <2024197151.318505.1697846673492@mail.yahoo.com>

I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.

Charlie, W4MEC in NC

From navyradiocom at gmail.com  Fri Oct 20 20:58:47 2023
From: navyradiocom at gmail.com (Tom Brent)
Date: Fri, 20 Oct 2023 17:58:47 -0700
Subject: [Milsurplus] DU & DW Loop Antenna
Message-ID: <65332248.170a0220.35c01.7f38@mx.google.com>

The DU and DW are virtually identical except for the loop antenna mounting. The DU has it mounted directly on top of the tuning/control unit and was intended for installations where there was no metal fuselage surrounding it. The DW was intended for installations where the loop needed to be mounted on the outside of the fuselage (such as a PBY) and thus required a longer connecting tube between the control unit and antenna. The DW manual provides instructions for mounting the loop and support bearing on the outside of the aircraft and then cutting the tube to an appropriate length for connection to the control unit. The photo that was posted appears to show a DW as evidenced by the short tube, support bearing and cast aluminum handwheel used for rotation. I have both units and the manual for each although my DW is essentially a parts unit.

Happy tinkering!

Tom

Sent from Mail for Windows

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From jpwatkins9 at gmail.com  Sat Oct 21 09:16:16 2023
From: jpwatkins9 at gmail.com (John Watkins)
Date: Sat, 21 Oct 2023 08:16:16 -0500
Subject: [Milsurplus] Fwd:  HP 410 AND 410 C ac probes
In-Reply-To: <55686c63bc16acd507bb6fbee76e8b62fe0b6471@webmail>
References: <55686c63bc16acd507bb6fbee76e8b62fe0b6471@webmail>
Message-ID: <CAEuLR7kkP0o5zD7jYpq19_csdXhoaWv5G5i43S4cOizocUVAWA@mail.gmail.com>

The probes have been spoken for.

John WD5ENU

---------- Forwarded message ---------
From: <joldenburg2 at new.rr.com>
Date: Fri, Oct 20, 2023 at 16:29
Subject: RE: [Milsurplus] HP 410 AND 410 C ac probes
To: John Watkins <jpwatkins9 at gmail.com>


I'd be interested in these!



Jon  AB9AH

"I have always preferred diversions to duties; this strange taste has clung
to me all through my life."
 Clarence Darrow

-----------------------------------------
From: "John Watkins"
To: HallicraftersRadios at groups.io, Milsurplus at mailman.qth.net,
armyradios at groups.io
Cc:
Sent: Friday October 20 2023 11:53:56AM
Subject: [Milsurplus] HP 410 AND 410 C ac probes

 While searching for parts for my Hallicrafters S-20R, ran into these HP
410 AC probes.  Both have the diode in them, are complete, and have cables
and plug.  $15 plus $11 usps flat rate postage.

John WD5ENU
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From wrcromwell at gmail.com  Sat Oct 21 10:38:26 2023
From: wrcromwell at gmail.com (Bill Cromwell)
Date: Sat, 21 Oct 2023 10:38:26 -0400
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <2024197151.318505.1697846673492@mail.yahoo.com>
References: <2024197151.318505.1697846673492@mail.yahoo.com>
Message-ID: <1102CE77-0BB7-440E-BEF0-877F3F2238D1@gmail.com>

Hi Charlie,

It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.

My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.

73,

Bill  KU8H

> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
> 
> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
> 
> Charlie, W4MEC in NC
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From kb8tq at n1k.org  Sat Oct 21 12:23:12 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Sat, 21 Oct 2023 12:23:12 -0400
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <1102CE77-0BB7-440E-BEF0-877F3F2238D1@gmail.com>
References: <2024197151.318505.1697846673492@mail.yahoo.com>
	<1102CE77-0BB7-440E-BEF0-877F3F2238D1@gmail.com>
Message-ID: <94886BC5-5A96-4438-B6C4-3EDFC138C31C@n1k.org>

Hi

Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 

Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 

Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 

Bob

> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> 
> Hi Charlie,
> 
> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
> 
> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
> 
> 73,
> 
> Bill  KU8H
> 
>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
>> 
>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
>> 
>> Charlie, W4MEC in NC
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


From kb8tq at n1k.org  Sat Oct 21 12:23:12 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Sat, 21 Oct 2023 12:23:12 -0400
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <1102CE77-0BB7-440E-BEF0-877F3F2238D1@gmail.com>
References: <2024197151.318505.1697846673492@mail.yahoo.com>
	<1102CE77-0BB7-440E-BEF0-877F3F2238D1@gmail.com>
Message-ID: <94886BC5-5A96-4438-B6C4-3EDFC138C31C@n1k.org>

Hi

Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 

Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 

Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 

Bob

> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> 
> Hi Charlie,
> 
> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
> 
> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
> 
> 73,
> 
> Bill  KU8H
> 
>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
>> 
>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
>> 
>> Charlie, W4MEC in NC
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Milsurplus mailing list
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> Help: http://mailman.qth.net/mmfaq.htm
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From wrcromwell at gmail.com  Sat Oct 21 14:12:30 2023
From: wrcromwell at gmail.com (Bill Cromwell)
Date: Sat, 21 Oct 2023 14:12:30 -0400
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <94886BC5-5A96-4438-B6C4-3EDFC138C31C@n1k.org>
References: <94886BC5-5A96-4438-B6C4-3EDFC138C31C@n1k.org>
Message-ID: <89E48BA8-88ED-4E4C-BA4F-B7A837576B0A@gmail.com>

Hi Bob,

The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"
SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.

I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.

73,

Bill  KU8H

> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:
> 
> ?Hi
> 
> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 
> 
> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 
> 
> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 
> 
> Bob
> 
>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
>> 
>> Hi Charlie,
>> 
>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
>> 
>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
>> 
>> 73,
>> 
>> Bill  KU8H
>> 
>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
>>> 
>>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
>>> 
>>> Charlie, W4MEC in NC
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> 

From kb8tq at n1k.org  Sat Oct 21 14:32:12 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Sat, 21 Oct 2023 14:32:12 -0400
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <89E48BA8-88ED-4E4C-BA4F-B7A837576B0A@gmail.com>
References: <94886BC5-5A96-4438-B6C4-3EDFC138C31C@n1k.org>
	<89E48BA8-88ED-4E4C-BA4F-B7A837576B0A@gmail.com>
Message-ID: <1EB2014C-49BE-418C-9C3E-047A1E1A4502@n1k.org>

Hi

If you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. 

Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. 

With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. 

Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. 

At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. 

Bob

> On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> 
> Hi Bob,
> 
> The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"
> SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.
> 
> I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.
> 
> 73,
> 
> Bill  KU8H
> 
>> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:
>> 
>> ?Hi
>> 
>> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 
>> 
>> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 
>> 
>> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 
>> 
>> Bob
>> 
>>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
>>> 
>>> Hi Charlie,
>>> 
>>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
>>> 
>>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
>>> 
>>> 73,
>>> 
>>> Bill  KU8H
>>> 
>>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
>>>> 
>>>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
>>>> 
>>>> Charlie, W4MEC in NC
>>>> ______________________________________________________________
>>>> Milsurplus mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Milsurplus at mailman.qth.net
>>>> 
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>> 


From kgordon2006 at frontier.com  Sat Oct 21 15:18:16 2023
From: kgordon2006 at frontier.com (Ken)
Date: Sat, 21 Oct 2023 12:18:16 -0700
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <1EB2014C-49BE-418C-9C3E-047A1E1A4502@n1k.org>
Message-ID: <957629030.1447240.1697915257687@frontier.com>

First pf all, both of you might care to explain some of your shortcuts: like SLAB, BMS, etc.Although I suspect the LAB in SLAB stands for Lead Acid Battery, what does the S denote??And BMS? Battery Management System? Maybe? What, specifically, is that?Curious minds need to know.Ken W7EKBP.S. My old and best Elmer, W7CJB, Woody Davey, told me once that he was pretty distressed about all the AC line noise that built up when the REA went to work after the 1930s some time. He told me that the bands were very quiet before that.Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
-------- Original message --------From: Bob Camp <kb8tq at n1k.org> Date: 10/21/23  11:32  (GMT-08:00) To: Bill Cromwell <wrcromwell at gmail.com> Cc: Milsurplus <milsurplus at mailman.qth.net> Subject: Re: [Milsurplus] RAK-RAL HiIf you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. Bob> On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com> wrote:> > Hi Bob,> > The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"> SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.> > I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.> > 73,> > Bill? KU8H> >> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:>> >> ?Hi>> >> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. >> >> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At? < 50 cents a cell, not a totally insane way to get the job done cost wise. >> >> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. >> >> Bob>> >>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:>>> >>> Hi Charlie,>>> >>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.>>> >>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.>>> >>> 73,>>> >>> Bill? KU8H>>> >>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:>>>> >>>> ?I too have both the RAK and RAL receivers up an running.? The RAK on a homebrew supply, the RAL on the proper AC supply.? I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.? While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.? If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.>>>> >>>> Charlie, W4MEC in NC>>>> ______________________________________________________________>>>> Milsurplus mailing list>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus>>>> Help: http://mailman.qth.net/mmfaq.htm>>>> Post: mailto:Milsurplus at mailman.qth.net>>>> >>>> This list hosted by: http://www.qsl.net>>>> Please help support this email list: http://www.qsl.net/donate.html>>> ______________________________________________________________>>> Milsurplus mailing list>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus>>> Help: http://mailman.qth.net/mmfaq.htm>>> Post: mailto:Milsurplus at mailman.qth.net>>> >>> This list hosted by: http://www.qsl.net>>> Please help support this email list: http://www.qsl.net/donate.html>> ______________________________________________________________Milsurplus mailing listHome: http://mailman.qth.net/mailman/listinfo/milsurplusHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Milsurplus at mailman.qth.netThis list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html
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From kb8tq at n1k.org  Sat Oct 21 15:25:24 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Sat, 21 Oct 2023 15:25:24 -0400
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <957629030.1447240.1697915257687@frontier.com>
References: <957629030.1447240.1697915257687@frontier.com>
Message-ID: <3508D94F-0029-4231-A972-90581603610C@n1k.org>

Hi

BMS = battery management system. It?s a board with ?stuff? on it. In a LiFePO4 battery it keeps the cells in balance. It also protects against short circuits / over discharge and to high a charge voltage. Some shut off charge at sub-freezing temperatures.

Why is this important?

It gets rid of the need for tight matching of cells. They ?equalize? every time you complete a charge cycle. It also protects against the ?usual problems?. While that sounds like overkill, it?s a pretty important thing for a fully self contained battery. 

SLAB = sealed lead acid battery = what you normally find in your UPS. Also known as a gel cell. 

Bob

> On Oct 21, 2023, at 3:18?PM, Ken <kgordon2006 at frontier.com> wrote:
> 
> First pf all, both of you might care to explain some of your shortcuts: like SLAB, BMS, etc.
> 
> Although I suspect the LAB in SLAB stands for Lead Acid Battery, what does the S denote? 
> 
> And BMS? Battery Management System? Maybe? What, specifically, is that?
> 
> Curious minds need to know.
> 
> Ken W7EKB
> 
> P.S. My old and best Elmer, W7CJB, Woody Davey, told me once that he was pretty distressed about all the AC line noise that built up when the REA went to work after the 1930s some time. He told me that the bands were very quiet before that.
> 
> 
> 
> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
> 
> 
> -------- Original message --------
> From: Bob Camp <kb8tq at n1k.org>
> Date: 10/21/23 11:32 (GMT-08:00)
> To: Bill Cromwell <wrcromwell at gmail.com>
> Cc: Milsurplus <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] RAK-RAL
> 
> Hi
> 
> If you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. 
> 
> Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. 
> 
> With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. 
> 
> Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. 
> 
> At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. 
> 
> Bob
> 
> > On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> > 
> > Hi Bob,
> > 
> > The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"
> > SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.
> > 
> > I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.
> > 
> > 73,
> > 
> > Bill  KU8H
> > 
> >> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:
> >> 
> >> ?Hi
> >> 
> >> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 
> >> 
> >> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 
> >> 
> >> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 
> >> 
> >> Bob
> >> 
> >>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> >>> 
> >>> Hi Charlie,
> >>> 
> >>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
> >>> 
> >>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
> >>> 
> >>> 73,
> >>> 
> >>> Bill  KU8H
> >>> 
> >>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
> >>>> 
> >>>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
> >>>> 
> >>>> Charlie, W4MEC in NC
> >>>> ______________________________________________________________
> >>>> Milsurplus mailing list
> >>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> >>>> Help: http://mailman.qth.net/mmfaq.htm
> >>>> Post: mailto:Milsurplus at mailman.qth.net
> >>>> 
> >>>> This list hosted by: http://www.qsl.net
> >>>> Please help support this email list: http://www.qsl.net/donate.html
> >>> ______________________________________________________________
> >>> Milsurplus mailing list
> >>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> >>> Help: http://mailman.qth.net/mmfaq.htm
> >>> Post: mailto:Milsurplus at mailman.qth.net
> >>> 
> >>> This list hosted by: http://www.qsl.net
> >>> Please help support this email list: http://www.qsl.net/donate.html
> >> 
> 
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

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From wrcromwell at gmail.com  Sat Oct 21 16:02:07 2023
From: wrcromwell at gmail.com (Bill Cromwell)
Date: Sat, 21 Oct 2023 16:02:07 -0400
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <957629030.1447240.1697915257687@frontier.com>
References: <957629030.1447240.1697915257687@frontier.com>
Message-ID: <A70B7959-C98B-4794-A52F-0F2AA6485845@gmail.com>

Hi Ken,

Those S.L.A.B. S are sealed, lead-acid batteries. mostly also with gelled electrolyte.

BMS is balanced management system. It limits/controls the charge *and* discharge of the cells in the battery pack. Balance among the cells is critical for safety with those things. We see on the evening news that fire departments are getting called out to some serious fires started by "lithium" batteries or their chargers. There are several different chemistries and the voltages and charge/discharge characteristics are enough different to be important.

73,

Bill  KU8H

> On Oct 21, 2023, at 3:07 PM, Ken <kgordon2006 at frontier.com> wrote:
> 
> ?
> First pf all, both of you might care to explain some of your shortcuts: like SLAB, BMS, etc.
> 
> Although I suspect the LAB in SLAB stands for Lead Acid Battery, what does the S denote? 
> 
> And BMS? Battery Management System? Maybe? What, specifically, is that?
> 
> Curious minds need to know.
> 
> Ken W7EKB
> 
> P.S. My old and best Elmer, W7CJB, Woody Davey, told me once that he was pretty distressed about all the AC line noise that built up when the REA went to work after the 1930s some time. He told me that the bands were very quiet before that.
> 
> 
> 
> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
> 
> 
> -------- Original message --------
> From: Bob Camp <kb8tq at n1k.org>
> Date: 10/21/23 11:32 (GMT-08:00)
> To: Bill Cromwell <wrcromwell at gmail.com>
> Cc: Milsurplus <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] RAK-RAL
> 
> Hi
> 
> If you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. 
> 
> Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. 
> 
> With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. 
> 
> Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. 
> 
> At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. 
> 
> Bob
> 
> > On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> > 
> > Hi Bob,
> > 
> > The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"
> > SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.
> > 
> > I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.
> > 
> > 73,
> > 
> > Bill  KU8H
> > 
> >> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:
> >> 
> >> ?Hi
> >> 
> >> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 
> >> 
> >> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 
> >> 
> >> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 
> >> 
> >> Bob
> >> 
> >>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> >>> 
> >>> Hi Charlie,
> >>> 
> >>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
> >>> 
> >>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
> >>> 
> >>> 73,
> >>> 
> >>> Bill  KU8H
> >>> 
> >>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
> >>>> 
> >>>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
> >>>> 
> >>>> Charlie, W4MEC in NC
> >>>> ______________________________________________________________
> >>>> Milsurplus mailing list
> >>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> >>>> Help: http://mailman.qth.net/mmfaq.htm
> >>>> Post: mailto:Milsurplus at mailman.qth.net
> >>>> 
> >>>> This list hosted by: http://www.qsl.net
> >>>> Please help support this email list: http://www.qsl.net/donate.html
> >>> ______________________________________________________________
> >>> Milsurplus mailing list
> >>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> >>> Help: http://mailman.qth.net/mmfaq.htm
> >>> Post: mailto:Milsurplus at mailman.qth.net
> >>> 
> >>> This list hosted by: http://www.qsl.net
> >>> Please help support this email list: http://www.qsl.net/donate.html
> >> 
> 
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From frledda at att.net  Sat Oct 21 16:12:49 2023
From: frledda at att.net (Francesco Ledda)
Date: Sat, 21 Oct 2023 15:12:49 -0500
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <957629030.1447240.1697915257687@frontier.com>
References: <957629030.1447240.1697915257687@frontier.com>
Message-ID: <E69B59F9-6C45-4901-9F97-EA44E5223350@att.net>

In series?

Sent from my iPad

> On Oct 21, 2023, at 14:07, Ken <kgordon2006 at frontier.com> wrote:
> 
> ?
> First pf all, both of you might care to explain some of your shortcuts: like SLAB, BMS, etc.
> 
> Although I suspect the LAB in SLAB stands for Lead Acid Battery, what does the S denote? 
> 
> And BMS? Battery Management System? Maybe? What, specifically, is that?
> 
> Curious minds need to know.
> 
> Ken W7EKB
> 
> P.S. My old and best Elmer, W7CJB, Woody Davey, told me once that he was pretty distressed about all the AC line noise that built up when the REA went to work after the 1930s some time. He told me that the bands were very quiet before that.
> 
> 
> 
> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
> 
> 
> -------- Original message --------
> From: Bob Camp <kb8tq at n1k.org>
> Date: 10/21/23 11:32 (GMT-08:00)
> To: Bill Cromwell <wrcromwell at gmail.com>
> Cc: Milsurplus <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] RAK-RAL
> 
> Hi
> 
> If you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. 
> 
> Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. 
> 
> With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. 
> 
> Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. 
> 
> At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. 
> 
> Bob
> 
> > On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> > 
> > Hi Bob,
> > 
> > The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"
> > SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.
> > 
> > I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.
> > 
> > 73,
> > 
> > Bill  KU8H
> > 
> >> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:
> >> 
> >> ?Hi
> >> 
> >> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 
> >> 
> >> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 
> >> 
> >> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 
> >> 
> >> Bob
> >> 
> >>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> >>> 
> >>> Hi Charlie,
> >>> 
> >>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
> >>> 
> >>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
> >>> 
> >>> 73,
> >>> 
> >>> Bill  KU8H
> >>> 
> >>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
> >>>> 
> >>>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
> >>>> 
> >>>> Charlie, W4MEC in NC
> >>>> ______________________________________________________________
> >>>> Milsurplus mailing list
> >>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> >>>> Help: http://mailman.qth.net/mmfaq.htm
> >>>> Post: mailto:Milsurplus at mailman.qth.net
> >>>> 
> >>>> This list hosted by: http://www.qsl.net
> >>>> Please help support this email list: http://www.qsl.net/donate.html
> >>> ______________________________________________________________
> >>> Milsurplus mailing list
> >>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> >>> Help: http://mailman.qth.net/mmfaq.htm
> >>> Post: mailto:Milsurplus at mailman.qth.net
> >>> 
> >>> This list hosted by: http://www.qsl.net
> >>> Please help support this email list: http://www.qsl.net/donate.html
> >> 
> 
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From kgordon2006 at frontier.com  Sat Oct 21 16:49:46 2023
From: kgordon2006 at frontier.com (Ken)
Date: Sat, 21 Oct 2023 13:49:46 -0700
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <E69B59F9-6C45-4901-9F97-EA44E5223350@att.net>
Message-ID: <451489061.1345268.1697920737034@frontier.com>

Yes. I think he mistakenly wrote it backwards: i.e. connecting LiFePo batteries in PARALLEL can be a problem. In series, not so much...Ken W7EKBSent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
-------- Original message --------From: Francesco Ledda <frledda at att.net> Date: 10/21/23  13:13  (GMT-08:00) To: Ken <kgordon2006 at frontier.com> Cc: Bob Camp <kb8tq at n1k.org>, Bill Cromwell <wrcromwell at gmail.com>, Milsurplus <milsurplus at mailman.qth.net> Subject: Re: [Milsurplus] RAK-RAL In series?Sent from my iPadOn Oct 21, 2023, at 14:07, Ken <kgordon2006 at frontier.com> wrote:?First pf all, both of you might care to explain some of your shortcuts: like SLAB, BMS, etc.Although I suspect the LAB in SLAB stands for Lead Acid Battery, what does the S denote??And BMS? Battery Management System? Maybe? What, specifically, is that?Curious minds need to know.Ken W7EKBP.S. My old and best Elmer, W7CJB, Woody Davey, told me once that he was pretty distressed about all the AC line noise that built up when the REA went to work after the 1930s some time. He told me that the bands were very quiet before that.Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone-------- Original message --------From: Bob Camp <kb8tq at n1k.org> Date: 10/21/23  11:32  (GMT-08:00) To: Bill Cromwell <wrcromwell at gmail.com> Cc: Milsurplus <milsurplus at mailman.qth.net> Subject: Re: [Milsurplus] RAK-RAL HiIf you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. Bob> On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com> wrote:> > Hi Bob,> > The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"> SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.> > I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.> > 73,> > Bill? KU8H> >> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:>> >> ?Hi>> >> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. >> >> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At? < 50 cents a cell, not a totally insane way to get the job done cost wise. >> >> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. >> >> Bob>> >>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:>>> >>> Hi Charlie,>>> >>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.>>> >>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.>>> >>> 73,>>> >>> Bill? KU8H>>> >>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:>>>> >>>> ?I too have both the RAK and RAL receivers up an running.? The RAK on a homebrew supply, the RAL on the proper AC supply.? I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.? While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.? If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.>>>> >>>> Charlie, W4MEC in NC>>>> ______________________________________________________________>>>> Milsurplus mailing list>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus>>>> Help: http://mailman.qth.net/mmfaq.htm>>>> Post: mailto:Milsurplus at mailman.qth.net>>>> >>>> This list hosted by: http://www.qsl.net>>>> Please help support this email list: http://www.qsl.net/donate.html>>> ______________________________________________________________>>> Milsurplus mailing list>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus>>> Help: http://mailman.qth.net/mmfaq.htm>>> Post: mailto:Milsurplus at mailman.qth.net>>> >>> This list hosted by: http://www.qsl.net>>> Please help support this email list: http://www.qsl.net/donate.html>> ______________________________________________________________Milsurplus mailing listHome: http://mailman.qth.net/mailman/listinfo/milsurplusHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Milsurplus at mailman.qth.netThis list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html______________________________________________________________Milsurplus mailing listHome: http://mailman.qth.net/mailman/listinfo/milsurplusHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Milsurplus at mailman.qth.netThis list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html
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From kb8tq at n1k.org  Sat Oct 21 16:46:27 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Sat, 21 Oct 2023 16:46:27 -0400
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <451489061.1345268.1697920737034@frontier.com>
References: <451489061.1345268.1697920737034@frontier.com>
Message-ID: <DE1EBB0F-8B8C-4202-8434-4FB8C09145A6@n1k.org>

Hi

LiFePO4?s get hooked in parallel a *lot* in very normal battery setups. That works with no need to equalize or balance. Hooking them in series without a balance / equalization setup is very dangerous. 

Bob

> On Oct 21, 2023, at 4:49?PM, Ken <kgordon2006 at frontier.com> wrote:
> 
> Yes. I think he mistakenly wrote it backwards: i.e. connecting LiFePo batteries in PARALLEL can be a problem. In series, not so much...
> 
> Ken W7EKB
> 
> 
> 
> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
> 
> 
> -------- Original message --------
> From: Francesco Ledda <frledda at att.net>
> Date: 10/21/23 13:13 (GMT-08:00)
> To: Ken <kgordon2006 at frontier.com>
> Cc: Bob Camp <kb8tq at n1k.org>, Bill Cromwell <wrcromwell at gmail.com>, Milsurplus <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] RAK-RAL
> 
> In series?
> 
> Sent from my iPad
> 
>> On Oct 21, 2023, at 14:07, Ken <kgordon2006 at frontier.com> wrote:
>> 
>> ?
>> First pf all, both of you might care to explain some of your shortcuts: like SLAB, BMS, etc.
>> 
>> Although I suspect the LAB in SLAB stands for Lead Acid Battery, what does the S denote? 
>> 
>> And BMS? Battery Management System? Maybe? What, specifically, is that?
>> 
>> Curious minds need to know.
>> 
>> Ken W7EKB
>> 
>> P.S. My old and best Elmer, W7CJB, Woody Davey, told me once that he was pretty distressed about all the AC line noise that built up when the REA went to work after the 1930s some time. He told me that the bands were very quiet before that.
>> 
>> 
>> 
>> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
>> 
>> 
>> -------- Original message --------
>> From: Bob Camp <kb8tq at n1k.org>
>> Date: 10/21/23 11:32 (GMT-08:00)
>> To: Bill Cromwell <wrcromwell at gmail.com>
>> Cc: Milsurplus <milsurplus at mailman.qth.net>
>> Subject: Re: [Milsurplus] RAK-RAL
>> 
>> Hi
>> 
>> If you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. 
>> 
>> Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. 
>> 
>> With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. 
>> 
>> Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. 
>> 
>> At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. 
>> 
>> Bob
>> 
>> > On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com> wrote:
>> > 
>> > Hi Bob,
>> > 
>> > The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"
>> > SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.
>> > 
>> > I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.
>> > 
>> > 73,
>> > 
>> > Bill  KU8H
>> > 
>> >> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:
>> >> 
>> >> ?Hi
>> >> 
>> >> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 
>> >> 
>> >> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 
>> >> 
>> >> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 
>> >> 
>> >> Bob
>> >> 
>> >>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
>> >>> 
>> >>> Hi Charlie,
>> >>> 
>> >>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
>> >>> 
>> >>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
>> >>> 
>> >>> 73,
>> >>> 
>> >>> Bill  KU8H
>> >>> 
>> >>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
>> >>>> 
>> >>>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
>> >>>> 
>> >>>> Charlie, W4MEC in NC
>> >>>> ______________________________________________________________
>> >>>> Milsurplus mailing list
>> >>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> >>>> Help: http://mailman.qth.net/mmfaq.htm
>> >>>> Post: mailto:Milsurplus at mailman.qth.net
>> >>>> 
>> >>>> This list hosted by: http://www.qsl.net
>> >>>> Please help support this email list: http://www.qsl.net/donate.html
>> >>> ______________________________________________________________
>> >>> Milsurplus mailing list
>> >>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> >>> Help: http://mailman.qth.net/mmfaq.htm
>> >>> Post: mailto:Milsurplus at mailman.qth.net
>> >>> 
>> >>> This list hosted by: http://www.qsl.net
>> >>> Please help support this email list: http://www.qsl.net/donate.html
>> >> 
>> 
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html

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From frledda at att.net  Sat Oct 21 16:55:05 2023
From: frledda at att.net (frledda at att.net)
Date: Sat, 21 Oct 2023 15:55:05 -0500
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <DE1EBB0F-8B8C-4202-8434-4FB8C09145A6@n1k.org>
References: <451489061.1345268.1697920737034@frontier.com>
	<DE1EBB0F-8B8C-4202-8434-4FB8C09145A6@n1k.org>
Message-ID: <011601da0460$df48e980$9ddabc80$@att.net>

I hope so ?

 

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Bob Camp
Sent: Saturday, October 21, 2023 3:46 PM
To: Ken <kgordon2006 at frontier.com>
Cc: Milsurplus <milsurplus at mailman.qth.net>; Francesco Ledda <frledda at att.net>
Subject: Re: [Milsurplus] RAK-RAL

 

Hi

 

LiFePO4?s get hooked in parallel a *lot* in very normal battery setups. That works with no need to equalize or balance. Hooking them in series without a balance / equalization setup is very dangerous. 

 

Bob





On Oct 21, 2023, at 4:49?PM, Ken <kgordon2006 at frontier.com <mailto:kgordon2006 at frontier.com> > wrote:

 

Yes. I think he mistakenly wrote it backwards: i.e. connecting LiFePo batteries in PARALLEL can be a problem. In series, not so much...

 

Ken W7EKB

 

 

 

Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone

 

 

-------- Original message --------

From: Francesco Ledda <frledda at att.net <mailto:frledda at att.net> > 

Date: 10/21/23 13:13 (GMT-08:00) 

To: Ken <kgordon2006 at frontier.com <mailto:kgordon2006 at frontier.com> > 

Cc: Bob Camp <kb8tq at n1k.org <mailto:kb8tq at n1k.org> >, Bill Cromwell <wrcromwell at gmail.com <mailto:wrcromwell at gmail.com> >, Milsurplus <milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net> > 

Subject: Re: [Milsurplus] RAK-RAL 

 

In series?

Sent from my iPad





On Oct 21, 2023, at 14:07, Ken <kgordon2006 at frontier.com <mailto:kgordon2006 at frontier.com> > wrote:

?

First pf all, both of you might care to explain some of your shortcuts: like SLAB, BMS, etc.

 

Although I suspect the LAB in SLAB stands for Lead Acid Battery, what does the S denote? 

 

And BMS? Battery Management System? Maybe? What, specifically, is that?

 

Curious minds need to know.

 

Ken W7EKB

 

P.S. My old and best Elmer, W7CJB, Woody Davey, told me once that he was pretty distressed about all the AC line noise that built up when the REA went to work after the 1930s some time. He told me that the bands were very quiet before that.

 

 

 

Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone

 

 

-------- Original message --------

From: Bob Camp <kb8tq at n1k.org <mailto:kb8tq at n1k.org> > 

Date: 10/21/23 11:32 (GMT-08:00) 

To: Bill Cromwell <wrcromwell at gmail.com <mailto:wrcromwell at gmail.com> > 

Cc: Milsurplus <milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net> > 

Subject: Re: [Milsurplus] RAK-RAL 

 

Hi

If you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. 

Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. 

With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. 

Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. 

At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. 

Bob

> On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com <mailto:wrcromwell at gmail.com> > wrote:
> 
> Hi Bob,
> 
> The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"
> SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.
> 
> I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.
> 
> 73,
> 
> Bill  KU8H
> 
>> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org <mailto:kb8tq at n1k.org> > wrote:
>> 
>> ?Hi
>> 
>> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 
>> 
>> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 
>> 
>> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 
>> 
>> Bob
>> 
>>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com <mailto:wrcromwell at gmail.com> > wrote:
>>> 
>>> Hi Charlie,
>>> 
>>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
>>> 
>>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
>>> 
>>> 73,
>>> 
>>> Bill  KU8H
>>> 
>>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net> > wrote:
>>>> 
>>>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
>>>> 
>>>> Charlie, W4MEC in NC
>>>> ______________________________________________________________
>>>> Milsurplus mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Milsurplus at mailman.qth.net
>>>> 
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>> 

______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

 

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From frledda at att.net  Sat Oct 21 17:18:10 2023
From: frledda at att.net (Francesco Ledda)
Date: Sat, 21 Oct 2023 16:18:10 -0500
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <DE1EBB0F-8B8C-4202-8434-4FB8C09145A6@n1k.org>
References: <DE1EBB0F-8B8C-4202-8434-4FB8C09145A6@n1k.org>
Message-ID: <52FF343F-2A19-44F7-B5C3-B229BB12EE3B@att.net>

Why, please, explain! 

Sent from my iPad

> On Oct 21, 2023, at 15:46, Bob Camp <kb8tq at n1k.org> wrote:
> 
> ?Hi
> 
> LiFePO4?s get hooked in parallel a *lot* in very normal battery setups. That works with no need to equalize or balance. Hooking them in series without a balance / equalization setup is very dangerous. 
> 
> Bob
> 
>> On Oct 21, 2023, at 4:49?PM, Ken <kgordon2006 at frontier.com> wrote:
>> 
>> Yes. I think he mistakenly wrote it backwards: i.e. connecting LiFePo batteries in PARALLEL can be a problem. In series, not so much...
>> 
>> Ken W7EKB
>> 
>> 
>> 
>> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
>> 
>> 
>> -------- Original message --------
>> From: Francesco Ledda <frledda at att.net>
>> Date: 10/21/23 13:13 (GMT-08:00)
>> To: Ken <kgordon2006 at frontier.com>
>> Cc: Bob Camp <kb8tq at n1k.org>, Bill Cromwell <wrcromwell at gmail.com>, Milsurplus <milsurplus at mailman.qth.net>
>> Subject: Re: [Milsurplus] RAK-RAL
>> 
>> In series?
>> 
>> Sent from my iPad
>> 
>>> On Oct 21, 2023, at 14:07, Ken <kgordon2006 at frontier.com> wrote:
>>> 
>>> ?
>>> First pf all, both of you might care to explain some of your shortcuts: like SLAB, BMS, etc.
>>> 
>>> Although I suspect the LAB in SLAB stands for Lead Acid Battery, what does the S denote? 
>>> 
>>> And BMS? Battery Management System? Maybe? What, specifically, is that?
>>> 
>>> Curious minds need to know.
>>> 
>>> Ken W7EKB
>>> 
>>> P.S. My old and best Elmer, W7CJB, Woody Davey, told me once that he was pretty distressed about all the AC line noise that built up when the REA went to work after the 1930s some time. He told me that the bands were very quiet before that.
>>> 
>>> 
>>> 
>>> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
>>> 
>>> 
>>> -------- Original message --------
>>> From: Bob Camp <kb8tq at n1k.org>
>>> Date: 10/21/23 11:32 (GMT-08:00)
>>> To: Bill Cromwell <wrcromwell at gmail.com>
>>> Cc: Milsurplus <milsurplus at mailman.qth.net>
>>> Subject: Re: [Milsurplus] RAK-RAL
>>> 
>>> Hi
>>> 
>>> If you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. 
>>> 
>>> Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. 
>>> 
>>> With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. 
>>> 
>>> Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. 
>>> 
>>> At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. 
>>> 
>>> Bob
>>> 
>>> > On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com> wrote:
>>> > 
>>> > Hi Bob,
>>> > 
>>> > The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"
>>> > SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.
>>> > 
>>> > I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.
>>> > 
>>> > 73,
>>> > 
>>> > Bill  KU8H
>>> > 
>>> >> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:
>>> >> 
>>> >> ?Hi
>>> >> 
>>> >> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 
>>> >> 
>>> >> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 
>>> >> 
>>> >> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 
>>> >> 
>>> >> Bob
>>> >> 
>>> >>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
>>> >>> 
>>> >>> Hi Charlie,
>>> >>> 
>>> >>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
>>> >>> 
>>> >>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
>>> >>> 
>>> >>> 73,
>>> >>> 
>>> >>> Bill  KU8H
>>> >>> 
>>> >>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
>>> >>>> 
>>> >>>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
>>> >>>> 
>>> >>>> Charlie, W4MEC in NC
>>> >>>> ______________________________________________________________
>>> >>>> Milsurplus mailing list
>>> >>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> >>>> Help: http://mailman.qth.net/mmfaq.htm
>>> >>>> Post: mailto:Milsurplus at mailman.qth.net
>>> >>>> 
>>> >>>> This list hosted by: http://www.qsl.net
>>> >>>> Please help support this email list: http://www.qsl.net/donate.html
>>> >>> ______________________________________________________________
>>> >>> Milsurplus mailing list
>>> >>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> >>> Help: http://mailman.qth.net/mmfaq.htm
>>> >>> Post: mailto:Milsurplus at mailman.qth.net
>>> >>> 
>>> >>> This list hosted by: http://www.qsl.net
>>> >>> Please help support this email list: http://www.qsl.net/donate.html
>>> >> 
>>> 
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
> 
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From frledda at att.net  Sat Oct 21 17:24:04 2023
From: frledda at att.net (Francesco Ledda)
Date: Sat, 21 Oct 2023 16:24:04 -0500
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <52FF343F-2A19-44F7-B5C3-B229BB12EE3B@att.net>
References: <52FF343F-2A19-44F7-B5C3-B229BB12EE3B@att.net>
Message-ID: <3968E485-8B4D-41F6-8778-2A5DC9AC6462@att.net>

Got it! Can get damaged during charging!

Sent from my iPad

> On Oct 21, 2023, at 16:18, Francesco Ledda <frledda at att.net> wrote:
> 
> ?Why, please, explain! 
> 
> Sent from my iPad
> 
>>> On Oct 21, 2023, at 15:46, Bob Camp <kb8tq at n1k.org> wrote:
>>> 
>> ?Hi
>> 
>> LiFePO4?s get hooked in parallel a *lot* in very normal battery setups. That works with no need to equalize or balance. Hooking them in series without a balance / equalization setup is very dangerous. 
>> 
>> Bob
>> 
>>> On Oct 21, 2023, at 4:49?PM, Ken <kgordon2006 at frontier.com> wrote:
>>> 
>>> Yes. I think he mistakenly wrote it backwards: i.e. connecting LiFePo batteries in PARALLEL can be a problem. In series, not so much...
>>> 
>>> Ken W7EKB
>>> 
>>> 
>>> 
>>> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
>>> 
>>> 
>>> -------- Original message --------
>>> From: Francesco Ledda <frledda at att.net>
>>> Date: 10/21/23 13:13 (GMT-08:00)
>>> To: Ken <kgordon2006 at frontier.com>
>>> Cc: Bob Camp <kb8tq at n1k.org>, Bill Cromwell <wrcromwell at gmail.com>, Milsurplus <milsurplus at mailman.qth.net>
>>> Subject: Re: [Milsurplus] RAK-RAL
>>> 
>>> In series?
>>> 
>>> Sent from my iPad
>>> 
>>>>> On Oct 21, 2023, at 14:07, Ken <kgordon2006 at frontier.com> wrote:
>>>>> 
>>>> ?
>>>> First pf all, both of you might care to explain some of your shortcuts: like SLAB, BMS, etc.
>>>> 
>>>> Although I suspect the LAB in SLAB stands for Lead Acid Battery, what does the S denote? 
>>>> 
>>>> And BMS? Battery Management System? Maybe? What, specifically, is that?
>>>> 
>>>> Curious minds need to know.
>>>> 
>>>> Ken W7EKB
>>>> 
>>>> P.S. My old and best Elmer, W7CJB, Woody Davey, told me once that he was pretty distressed about all the AC line noise that built up when the REA went to work after the 1930s some time. He told me that the bands were very quiet before that.
>>>> 
>>>> 
>>>> 
>>>> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
>>>> 
>>>> 
>>>> -------- Original message --------
>>>> From: Bob Camp <kb8tq at n1k.org>
>>>> Date: 10/21/23 11:32 (GMT-08:00)
>>>> To: Bill Cromwell <wrcromwell at gmail.com>
>>>> Cc: Milsurplus <milsurplus at mailman.qth.net>
>>>> Subject: Re: [Milsurplus] RAK-RAL
>>>> 
>>>> Hi
>>>> 
>>>> If you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. 
>>>> 
>>>> Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. 
>>>> 
>>>> With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. 
>>>> 
>>>> Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. 
>>>> 
>>>> At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. 
>>>> 
>>>> Bob
>>>> 
>>>> > On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com> wrote:
>>>> > 
>>>> > Hi Bob,
>>>> > 
>>>> > The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"
>>>> > SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.
>>>> > 
>>>> > I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.
>>>> > 
>>>> > 73,
>>>> > 
>>>> > Bill  KU8H
>>>> > 
>>>> >> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:
>>>> >> 
>>>> >> ?Hi
>>>> >> 
>>>> >> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 
>>>> >> 
>>>> >> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 
>>>> >> 
>>>> >> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 
>>>> >> 
>>>> >> Bob
>>>> >> 
>>>> >>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
>>>> >>> 
>>>> >>> Hi Charlie,
>>>> >>> 
>>>> >>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
>>>> >>> 
>>>> >>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
>>>> >>> 
>>>> >>> 73,
>>>> >>> 
>>>> >>> Bill  KU8H
>>>> >>> 
>>>> >>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
>>>> >>>> 
>>>> >>>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
>>>> >>>> 
>>>> >>>> Charlie, W4MEC in NC
>>>> >>>> ______________________________________________________________
>>>> >>>> Milsurplus mailing list
>>>> >>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> >>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> >>>> Post: mailto:Milsurplus at mailman.qth.net
>>>> >>>> 
>>>> >>>> This list hosted by: http://www.qsl.net
>>>> >>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> >>> ______________________________________________________________
>>>> >>> Milsurplus mailing list
>>>> >>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> >>> Help: http://mailman.qth.net/mmfaq.htm
>>>> >>> Post: mailto:Milsurplus at mailman.qth.net
>>>> >>> 
>>>> >>> This list hosted by: http://www.qsl.net
>>>> >>> Please help support this email list: http://www.qsl.net/donate.html
>>>> >> 
>>>> 
>>>> ______________________________________________________________
>>>> Milsurplus mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Milsurplus at mailman.qth.net
>>>> 
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html______________________________________________________________
>>>> Milsurplus mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Milsurplus at mailman.qth.net
>>>> 
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>> 
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
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From kb8tq at n1k.org  Sat Oct 21 17:28:12 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Sat, 21 Oct 2023 17:28:12 -0400
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <52FF343F-2A19-44F7-B5C3-B229BB12EE3B@att.net>
References: <DE1EBB0F-8B8C-4202-8434-4FB8C09145A6@n1k.org>
	<52FF343F-2A19-44F7-B5C3-B229BB12EE3B@att.net>
Message-ID: <3B3C0167-6A1C-43EB-B3AB-9EF8F34D9E4C@n1k.org>

Hi

If you are hooking up raw cells, you fully charge them before you do anything. When you attach them together, nothing weird happens (the voltages are all the same). Once that is done, the voltages all track. Each cell contributes to the current to the load. Is that the whole story? No, but it?s the quick version. As things operate, they stay together.

If you hook the cells in series, they tend to get ?out of sync?. Some cells lag behind the others voltage wise. If this goes on for a long time, you could reverse the voltage on a cell. The balance circuit moves charge between cells in the stack to keep them all same/same. There is no build up of charging error. The problem is taken care of. 

Back in the old days folks tried to match cells to take care of the ?series issue?. That turned out to not work well with lithium cells. 

If you have commercial packaged 12V batteries, the BMS is already ?in the package?. You aren?t dealing with cells directly. The BMS prevents over charge / over discharge / and does the balancing. Putting things in parallel typically works (at least to a point). Putting things in series may not work with the MOSFET in this or tha BMS design. Thus it matters a bit if we?re talking about raw cells or a commercial product. 

So no, it?s not terribly clear is it? Sorry about that ?.

Bob

> On Oct 21, 2023, at 5:18?PM, Francesco Ledda <frledda at att.net> wrote:
> 
> Why, please, explain! 
> 
> Sent from my iPad
> 
>> On Oct 21, 2023, at 15:46, Bob Camp <kb8tq at n1k.org> wrote:
>> 
>> ?Hi
>> 
>> LiFePO4?s get hooked in parallel a *lot* in very normal battery setups. That works with no need to equalize or balance. Hooking them in series without a balance / equalization setup is very dangerous. 
>> 
>> Bob
>> 
>>> On Oct 21, 2023, at 4:49?PM, Ken <kgordon2006 at frontier.com> wrote:
>>> 
>>> Yes. I think he mistakenly wrote it backwards: i.e. connecting LiFePo batteries in PARALLEL can be a problem. In series, not so much...
>>> 
>>> Ken W7EKB
>>> 
>>> 
>>> 
>>> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
>>> 
>>> 
>>> -------- Original message --------
>>> From: Francesco Ledda <frledda at att.net>
>>> Date: 10/21/23 13:13 (GMT-08:00)
>>> To: Ken <kgordon2006 at frontier.com>
>>> Cc: Bob Camp <kb8tq at n1k.org>, Bill Cromwell <wrcromwell at gmail.com>, Milsurplus <milsurplus at mailman.qth.net>
>>> Subject: Re: [Milsurplus] RAK-RAL
>>> 
>>> In series?
>>> 
>>> Sent from my iPad
>>> 
>>>> On Oct 21, 2023, at 14:07, Ken <kgordon2006 at frontier.com> wrote:
>>>> 
>>>> ?
>>>> First pf all, both of you might care to explain some of your shortcuts: like SLAB, BMS, etc.
>>>> 
>>>> Although I suspect the LAB in SLAB stands for Lead Acid Battery, what does the S denote? 
>>>> 
>>>> And BMS? Battery Management System? Maybe? What, specifically, is that?
>>>> 
>>>> Curious minds need to know.
>>>> 
>>>> Ken W7EKB
>>>> 
>>>> P.S. My old and best Elmer, W7CJB, Woody Davey, told me once that he was pretty distressed about all the AC line noise that built up when the REA went to work after the 1930s some time. He told me that the bands were very quiet before that.
>>>> 
>>>> 
>>>> 
>>>> Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
>>>> 
>>>> 
>>>> -------- Original message --------
>>>> From: Bob Camp <kb8tq at n1k.org>
>>>> Date: 10/21/23 11:32 (GMT-08:00)
>>>> To: Bill Cromwell <wrcromwell at gmail.com>
>>>> Cc: Milsurplus <milsurplus at mailman.qth.net>
>>>> Subject: Re: [Milsurplus] RAK-RAL
>>>> 
>>>> Hi
>>>> 
>>>> If you head off shopping for affordable LiFePO4 batteries, be aware that some of them are not happy when run in series. You can parallel them just fine, just on 12+12 = 24 sort of stuff. 
>>>> 
>>>> Typical low end prices seem to be around the $250 to $300 range for 100AH / 12V retail versions. Various surplus alternatives exist. The surplus ones may or (more likely) may not come with a functioning BMS. Once you buy one of those, the cost of the surplus approach may or may not be as attractive. 
>>>> 
>>>> With lead acid you get about 50% of the ?label capacity? in usable AH. Your 100AH battery gives you 50AH usable. Most LiFePO4?s are up in the 100% range. Your $250 100AH retail version is effectively the same as a pair of 100AH lead acid?s. 
>>>> 
>>>> Yes, you will need two 12V batteries to get to 24V. Doing some sort of custom 24 V stack from surplus parts still isn?t out of the running. You only need one BMS for that stack. 
>>>> 
>>>> At 24V / 1.5A for your filaments, a 24V 100AH setup is going to run over 60 hours. Toss in a transmitter that on for some percentage of the time and that will indeed drop. At 4 hours a day, you are past 2 weeks of operation in the ?receive only? mode. Yes, the filament batteries are the ?big deal?. 
>>>> 
>>>> Bob
>>>> 
>>>> > On Oct 21, 2023, at 2:12?PM, Bill Cromwell <wrcromwell at gmail.com> wrote:
>>>> > 
>>>> > Hi Bob,
>>>> > 
>>>> > The weak part of using battery power with the tube radios is the heaters. I use "12 Volt"
>>>> > SLAB batteries with two in series on the heaters of unmodified R-23 or BC variants. I get a few hours of operation between recharges. Practical. I get several weeks from my 90 Volt packs in daily operation. Practical. If I modify the screen supply those radios will operate on less than 45 Volts B+. Unmodified at 90 Volts the R-23 I am still using draws a bit less than 15 mA.
>>>> > 
>>>> > I would encourage anybody interested in battery operation to give it a go. I am still using SLABs because I am already invested in them. As they age out I intend to acquire the LiFePO4 battery packs. I would suggest anybody who wants to get started to start with those.
>>>> > 
>>>> > 73,
>>>> > 
>>>> > Bill  KU8H
>>>> > 
>>>> >> On Oct 21, 2023, at 12:23 PM, Bob Camp <kb8tq at n1k.org> wrote:
>>>> >> 
>>>> >> ?Hi
>>>> >> 
>>>> >> Lets?s see ? hmmm ?. surplus 3.6V LiFePO4 cells are all over the place. Wire up a hundred (gulp ?) of them and you have a 360V plate supply. Toss in a few more and you are at 400 or 450. You won?t have a BMS (a 500V capable BMS is crazy expensive). You charge them each up and then interconnect them (even bigger gulp ?.). Fortunately they seem to have very good shelf life. They also have a pretty flat discharge curve so the voltage doesn?t droop very fast at all. 
>>>> >> 
>>>> >> Even the little guys are in the ?couple of amp hours? range. If you are running (say) 100 to 200 ma key down, that?s a *lot* of transmit time. Size wise, the filament battery likely takes up more room. At  < 50 cents a cell, not a totally insane way to get the job done cost wise. 
>>>> >> 
>>>> >> Yes, the whole ?interconnect them? thing would take more than a bit of thinking in order to do it safely. 
>>>> >> 
>>>> >> Bob
>>>> >> 
>>>> >>> On Oct 21, 2023, at 10:38?AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
>>>> >>> 
>>>> >>> Hi Charlie,
>>>> >>> 
>>>> >>> It has been my pleasure to be on the air when a power outage landed here.I have been moving to battery operation here full time. I have been using batteries for tube receivers for some time with a series stack of 9-Volt "transistor" batteries for ~90 Volts B+ with my R23 and it's six tubes. I do not yet have a battery supply for tube transmitters of more than one or two watts. I have not applied this to my RAK but I know what I will have to do. I see no reason why it will not give good service.
>>>> >>> 
>>>> >>> My motivation was the increased isolation from the AC power line and the noise that can be conducted into the receiver. It really does help. Operation without the electric utility is just icing on the cake.
>>>> >>> 
>>>> >>> 73,
>>>> >>> 
>>>> >>> Bill  KU8H
>>>> >>> 
>>>> >>>>> On Oct 20, 2023, at 8:04 PM, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:
>>>> >>>> 
>>>> >>>> ?I too have both the RAK and RAL receivers up an running.  The RAK on a homebrew supply, the RAL on the proper AC supply.  I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern.  While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out.  If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
>>>> >>>> 
>>>> >>>> Charlie, W4MEC in NC
>>>> >>>> ______________________________________________________________
>>>> >>>> Milsurplus mailing list
>>>> >>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> >>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> >>>> Post: mailto:Milsurplus at mailman.qth.net
>>>> >>>> 
>>>> >>>> This list hosted by: http://www.qsl.net
>>>> >>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> >>> ______________________________________________________________
>>>> >>> Milsurplus mailing list
>>>> >>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> >>> Help: http://mailman.qth.net/mmfaq.htm
>>>> >>> Post: mailto:Milsurplus at mailman.qth.net
>>>> >>> 
>>>> >>> This list hosted by: http://www.qsl.net
>>>> >>> Please help support this email list: http://www.qsl.net/donate.html
>>>> >> 
>>>> 
>>>> ______________________________________________________________
>>>> Milsurplus mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Milsurplus at mailman.qth.net
>>>> 
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html______________________________________________________________
>>>> Milsurplus mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Milsurplus at mailman.qth.net
>>>> 
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>> 
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html

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From usstexasradio at gmail.com  Sat Oct 21 17:35:58 2023
From: usstexasradio at gmail.com (Konrad Werzner)
Date: Sat, 21 Oct 2023 16:35:58 -0500
Subject: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
In-Reply-To: <668706072.10894535.1697492777099@mail.yahoo.com>
References: <83afc332-910e-4284-82fd-898ecc3e181b@ix.netcom.com>
	<CAB55hNf_-j8OqdGgHxVsL9uk7Yg6Y=XjcMNNPSCVKhgEpSmvKg@mail.gmail.com>
	<DM8P220MB04725A687C66DA413FDEF554B8D0A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQb4kCm6F_PUpK9AMNP-by_2GGgaJH86wHOx9AeEnBNzQ@mail.gmail.com>
	<DM8P220MB0472D2DE88F50619AC0EA30CB8D7A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<CA++10jQQe-qhxf_-nJFUhSYUT=7TFG5kgkJX+=pBDFCca6ddRg@mail.gmail.com>
	<CO6PR19MB5434C6503C92D771C08AFCFDE4D7A@CO6PR19MB5434.namprd19.prod.outlook.com>
	<SJ0PR12MB6878075A773D3F1670C3C2C6C4D7A@SJ0PR12MB6878.namprd12.prod.outlook.com>
	<668706072.10894535.1697492777099@mail.yahoo.com>
Message-ID: <CA++10jSz1211eka-g6g9Ob5J93vtUbCnoT-G9FupqyiEHUh7ng@mail.gmail.com>

Digging through the DTIC database, I found one of the benchmarking
documents for the RAS. It's labeled "XRAS" since it was still experimental
at the time and appears to fail in a lot of Navy benchmarking requirements.
It's interesting to note that this is what caused the eventually approved
RAS to use of the 6V6G and 6F8G tubes compared to other HROs. Enjoy
reading:

https://apps.dtic.mil/sti/trecms/pdf/AD1158726.pdf

On Mon, Oct 16, 2023 at 4:47?PM Jim Whartenby via Milsurplus <
milsurplus at mailman.qth.net> wrote:

> I believe coaxial cable was invented some 50 years earlier (1880) by
> Oliver Heaviside who also held the original patent.  His biography is worth
> a look, talk about being ahead of your time!
> Jim
>
> Logic: Method used to arrive at the wrong conclusion, with confidence.
> Murphy
>
>
> On Monday, October 16, 2023 at 03:38:17 PM CDT, howard holden <
> holden7471 at msn.com> wrote:
>
>
> Very specifically, submarines used coax cables. Don?t recall other ships
> using, but I can?t imagine why not. Coax was invented in 1929 I think.
>
>
>
> Howie WB2AWQ
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows
>
>
>
> *From: *Hubert Miller <Kargo_cult at msn.com>
> *Sent: *Monday, October 16, 2023 1:27 PM
> *To: *milsurplus at mailman <milsurplus at mailman.qth.net>
> *Subject: *Re: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
>
>
>
> I don't think any WWII era ship used coax for HF.
> Or, what am i missing?
> So is there a coax - single wire conversion needed?
> -Hue Miller
> ______________________________________________________________
> Milsurplus mailing list
> Home:
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> Help:
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> <http://www.qsl.net/donate.html>
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> ______________________________________________________________
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> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
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> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
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From arc5 at ix.netcom.com  Sat Oct 21 17:57:09 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sat, 21 Oct 2023 16:57:09 -0500
Subject: [Milsurplus] RAL Receiver
Message-ID: <7f94ed70-dfde-46c9-a291-9c900c1d034e@ix.netcom.com>

I'm looking for a specific RAL receiver owner.
One who is either using his RAL, or has it on
his bench and regularly works to put it in
operation.

That person's RAL is missing its case.

I do NOT want to know about those who have an
RAL in a lost corner of the barn since 1968,
down in the often-flooding basement, or
down near the bottom of the "get around to it"
pile in the garage since that hamfest 17 years ago.

I'm looking for the person who actually wants to
use his RAL and is actually taking steps to accomplish it.

TNX OM DE Dave AB5S

-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com

From kgordon2006 at frontier.com  Sun Oct 22 00:42:57 2023
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Sat, 21 Oct 2023 21:42:57 -0700
Subject: [Milsurplus] RAK-RAL - the use of...
In-Reply-To: <89E48BA8-88ED-4E4C-BA4F-B7A837576B0A@gmail.com>
References: <94886BC5-5A96-4438-B6C4-3EDFC138C31C@n1k.org>,
	<89E48BA8-88ED-4E4C-BA4F-B7A837576B0A@gmail.com>
Message-ID: <6534A851.25581.3162C63B@kgordon2006.frontier.com>

I have made somewhat extensive use of both the RAL and the RAK receivers and would like 
to share some of my experiences with both.

Both of my receivers were being operated from the original power supplies, which are really 
too big and too power hungry for ham radio use. They aren't needed where you don't have 
big turrets being swung around drawing the line voltage down each time.

In a normal ham station, a very simple supply, providing 180 VDC at a few miliamps is 
usually all that is required. A regulated 90 VDC is nice, but not absolutely necessary.

In fact, according to the manuals on these receivers, they work just fine with ONLY the 90 
VDC source.

Anyway, with regard to the RAK, I used mine to copy 5 letter code grounps from the U.S. 
Navy VLF stations while they were still using CW, and before they switched to RATT. I was 
intending to work my way up to 30 wpm of steady error-free copy as I wanted to go to sea to 
be a ship-board radio operator.

I eventually got my 2nd Class Radio Telegraph license toward that end, but many things 
intervened and I never was able to complete that project.

The Navy station at Jim Creek in Washington state always came in to my station in Missoula, 
Montana like gang-busters 24/7/365. I think I could have used a wet-string as an antenna.

The first thing I noticed about my RAK was its amazing stability. It was rock steady. Once 
tuned to a signal, it remained there. One could literally hammer on the radio with a hammer 
and it never moved frequency.

The second, most amazing thing, to find was its "single-signal" selectivity. The "other side" of 
zero beat simply wasn't there....at all. Not even a hint of it.

I am still somewhat in the dark as to how this was done. I believe it was due to the "Q" of the 
tuned circuits in the radio. I understand that that value was around 1500, which is very 
unusual for such coils.

Maybe someone here can enlighten me how this was done.

With regard to my RAL, I traded a BC-348 with BC band ARC-5 "Q-5er" for it while I was a 
new General (actualy Conditional) class ham so that I could work 15 meters.

I used my RAL for some 12 years as my only station receiver, and never turned it off.

My ONLY complaint with it was the total lack of a real frequency readout. Using the tuning 
chart in the manual was difficult, but I got used to it.

Again, like the RAK, it was unconditionally stable.

I really liked its "quietness" and sensitivity.

I used it for every common mode at the time, CW, AM, SSB, RTTY. I could have used it for 
digital modes (other than CW and RTTY) if they had existed at the time.

Ken W7EKB
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From holden7471 at msn.com  Sun Oct 22 00:53:59 2023
From: holden7471 at msn.com (howard holden)
Date: Sun, 22 Oct 2023 04:53:59 +0000
Subject: [Milsurplus] RAK-RAL - the use of...
In-Reply-To: <6534A851.25581.3162C63B@kgordon2006.frontier.com>
References: <94886BC5-5A96-4438-B6C4-3EDFC138C31C@n1k.org>,
	<89E48BA8-88ED-4E4C-BA4F-B7A837576B0A@gmail.com>
	<6534A851.25581.3162C63B@kgordon2006.frontier.com>
Message-ID: <SJ0PR12MB687816A82A77B3BE9995B078C4D9A@SJ0PR12MB6878.namprd12.prod.outlook.com>

Amen Ken! As far as readout goes that?s why ships carried the LM freq meters. The transmitters often had no direct readout either. The RAL is just a sweet receiver. And built like a tank.

Howie WB2AWQ

Sent from my iPhone

On Oct 21, 2023, at 21:43, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:

?
I have made somewhat extensive use of both the RAL and the RAK receivers and would like to share some of my experiences with both.
Both of my receivers were being operated from the original power supplies, which are really too big and too power hungry for ham radio use. They aren't needed where you don't have big turrets being swung around drawing the line voltage down each time.
In a normal ham station, a very simple supply, providing 180 VDC at a few miliamps is usually all that is required. A regulated 90 VDC is nice, but not absolutely necessary.
In fact, according to the manuals on these receivers, they work just fine with ONLY the 90 VDC source.
Anyway, with regard to the RAK, I used mine to copy 5 letter code grounps from the U.S. Navy VLF stations while they were still using CW, and before they switched to RATT. I was intending to work my way up to 30 wpm of steady error-free copy as I wanted to go to sea to be a ship-board radio operator.
I eventually got my 2nd Class Radio Telegraph license toward that end, but many things intervened and I never was able to complete that project.
The Navy station at Jim Creek in Washington state always came in to my station in Missoula, Montana like gang-busters 24/7/365. I think I could have used a wet-string as an antenna.
The first thing I noticed about my RAK was its amazing stability. It was rock steady. Once tuned to a signal, it remained there. One could literally hammer on the radio with a hammer and it never moved frequency.
The second, most amazing thing, to find was its "single-signal" selectivity. The "other side" of zero beat simply wasn't there....at all. Not even a hint of it.
I am still somewhat in the dark as to how this was done. I believe it was due to the "Q" of the tuned circuits in the radio. I understand that that value was around 1500, which is very unusual for such coils.
Maybe someone here can enlighten me how this was done.
With regard to my RAL, I traded a BC-348 with BC band ARC-5 "Q-5er" for it while I was a new General (actualy Conditional) class ham so that I could work 15 meters.
I used my RAL for some 12 years as my only station receiver, and never turned it off.
My ONLY complaint with it was the total lack of a real frequency readout. Using the tuning chart in the manual was difficult, but I got used to it.
Again, like the RAK, it was unconditionally stable.
I really liked its "quietness" and sensitivity.
I used it for every common mode at the time, CW, AM, SSB, RTTY. I could have used it for digital modes (other than CW and RTTY) if they had existed at the time.
Ken W7EKB
______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

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Please help support this email list: http://www.qsl.net/donate.html
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From rdesilva49 at gmail.com  Sun Oct 22 01:18:55 2023
From: rdesilva49 at gmail.com (Ron De Silva)
Date: Sat, 21 Oct 2023 22:18:55 -0700
Subject: [Milsurplus] RAK-RAL - the use of...
In-Reply-To: <SJ0PR12MB687816A82A77B3BE9995B078C4D9A@SJ0PR12MB6878.namprd12.prod.outlook.com>
References: <94886BC5-5A96-4438-B6C4-3EDFC138C31C@n1k.org>
	<89E48BA8-88ED-4E4C-BA4F-B7A837576B0A@gmail.com>
	<6534A851.25581.3162C63B@kgordon2006.frontier.com>
	<SJ0PR12MB687816A82A77B3BE9995B078C4D9A@SJ0PR12MB6878.namprd12.prod.outlook.com>
Message-ID: <CAE7jS=1D3nyRsnKbo85mCdfauGv7G7X6p46BCOGL_wGKy8awHg@mail.gmail.com>

Yesterday evening with the trusty RAL5 and TDE2 on the big 10ft diam mag
loop....no problem for a QSO with  C6AXX Bahamas .

Radios refereed to as "hopeless relics" by one of the ham magazines of the
60's.

?

They just WORK !
Ron

NU6F
RENO,NV

On Sat, Oct 21, 2023, 9:54 PM howard holden <holden7471 at msn.com> wrote:

> Amen Ken! As far as readout goes that?s why ships carried the LM freq
> meters. The transmitters often had no direct readout either. The RAL is
> just a sweet receiver. And built like a tank.
>
> Howie WB2AWQ
>
> Sent from my iPhone
>
> On Oct 21, 2023, at 21:43, Kenneth G. Gordon <kgordon2006 at frontier.com>
> wrote:
>
> ?
> I have made somewhat extensive use of both the RAL and the RAK receivers
> and would like to share some of my experiences with both.
> Both of my receivers were being operated from the original power supplies,
> which are really too big and too power hungry for ham radio use. They
> aren't needed where you don't have big turrets being swung around drawing
> the line voltage down each time.
> In a normal ham station, a very simple supply, providing 180 VDC at a few
> miliamps is usually all that is required. A regulated 90 VDC is nice, but
> not absolutely necessary.
> In fact, according to the manuals on these receivers, they work just fine
> with ONLY the 90 VDC source.
> Anyway, with regard to the RAK, I used mine to copy 5 letter code grounps
> from the U.S. Navy VLF stations while they were still using CW, and before
> they switched to RATT. I was intending to work my way up to 30 wpm of
> steady error-free copy as I wanted to go to sea to be a ship-board radio
> operator.
> I eventually got my 2nd Class Radio Telegraph license toward that end, but
> many things intervened and I never was able to complete that project.
> The Navy station at Jim Creek in Washington state always came in to my
> station in Missoula, Montana like gang-busters 24/7/365. I think I could
> have used a wet-string as an antenna.
> The first thing I noticed about my RAK was its amazing stability. It was
> rock steady. Once tuned to a signal, it remained there. One could literally
> hammer on the radio with a hammer and it never moved frequency.
> The second, most amazing thing, to find was its "single-signal"
> selectivity. The "other side" of zero beat simply wasn't there....at all.
> Not even a hint of it.
> I am still somewhat in the dark as to how this was done. I believe it was
> due to the "Q" of the tuned circuits in the radio. I understand that that
> value was around 1500, which is very unusual for such coils.
> Maybe someone here can enlighten me how this was done.
> With regard to my RAL, I traded a BC-348 with BC band ARC-5 "Q-5er" for it
> while I was a new General (actualy Conditional) class ham so that I could
> work 15 meters.
> I used my RAL for some 12 years as my only station receiver, and never
> turned it off.
> My ONLY complaint with it was the total lack of a real frequency readout.
> Using the tuning chart in the manual was difficult, but I got used to it.
> Again, like the RAK, it was unconditionally stable.
> I really liked its "quietness" and sensitivity.
> I used it for every common mode at the time, CW, AM, SSB, RTTY. I could
> have used it for digital modes (other than CW and RTTY) if they had existed
> at the time.
> Ken W7EKB
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
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> Please help support this email list: http://www.qsl.net/donate.html
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From arc5 at ix.netcom.com  Sun Oct 22 08:22:40 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 22 Oct 2023 07:22:40 -0500
Subject: [Milsurplus] RAK-RAL - the use of...
In-Reply-To: <CAE7jS=1D3nyRsnKbo85mCdfauGv7G7X6p46BCOGL_wGKy8awHg@mail.gmail.com>
References: <94886BC5-5A96-4438-B6C4-3EDFC138C31C@n1k.org>
	<89E48BA8-88ED-4E4C-BA4F-B7A837576B0A@gmail.com>
	<6534A851.25581.3162C63B@kgordon2006.frontier.com>
	<SJ0PR12MB687816A82A77B3BE9995B078C4D9A@SJ0PR12MB6878.namprd12.prod.outlook.com>
	<CAE7jS=1D3nyRsnKbo85mCdfauGv7G7X6p46BCOGL_wGKy8awHg@mail.gmail.com>
Message-ID: <4b23d15d-0e1d-4fa5-a822-fb9b1f4af6e7@ix.netcom.com>

Thank you for this, Ron, and thank your for being
part of the community keeping REAL radios alive.

Today's detractors do NOT use "radios;"
they are thralls serving a demanding "Computer with an antenna."
After they take two college semesters in how to work the thing,
they leave it to "earn" DXCC for them while they do something
more challenging- like pick their noses.

GL OM ES 73 DE Dave AB5S

On 10/22/2023 12:18 AM, Ron De Silva wrote:
> Yesterday evening with the trusty RAL5 and TDE2 on the big 10ft diam mag 
> loop....no problem for a QSO with? C6AXX Bahamas .
> 
> Radios refereed to as "hopeless relics" by one of the ham magazines of 
> the 60's.

-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com

From wrcromwell at gmail.com  Sun Oct 22 13:48:02 2023
From: wrcromwell at gmail.com (Bill Cromwell)
Date: Sun, 22 Oct 2023 13:48:02 -0400
Subject: [Milsurplus] RAK-RAL - the use of...
In-Reply-To: <SJ0PR12MB687816A82A77B3BE9995B078C4D9A@SJ0PR12MB6878.namprd12.prod.outlook.com>
References: <SJ0PR12MB687816A82A77B3BE9995B078C4D9A@SJ0PR12MB6878.namprd12.prod.outlook.com>
Message-ID: <CD8EC853-DC95-4A32-A920-455D46659E03@gmail.com>

Hi,

The LM and BC221 don't have direct frequency readout either and require looking up frequencies in the code book and then doing interpolation to extrapolation. They do have that xtal to calibrate. For my RAK and my SW3 with no direct readout I have made some scales with a spreadsheet and printing the frequency v readout on a nice curve. We can pretune to a desired frequency from that chart and be right on it when an expected signal is transmitted. We record the dial setting for desired, frequently used frequencies and reliably repeat the setting.

Some people cannot tell time with a real clock, especially one with no numbers on it. Count change? Forget about it.

73,

Bill  KU8H

> On Oct 22, 2023, at 12:54 AM, howard holden <holden7471 at msn.com> wrote:
> 
> ? Amen Ken! As far as readout goes that?s why ships carried the LM freq meters. The transmitters often had no direct readout either. The RAL is just a sweet receiver. And built like a tank. 
> 
> Howie WB2AWQ
> 
> Sent from my iPhone
> 
>>> On Oct 21, 2023, at 21:43, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
>>> 
>> ?
>> I have made somewhat extensive use of both the RAL and the RAK receivers and would like to share some of my experiences with both.
>> Both of my receivers were being operated from the original power supplies, which are really too big and too power hungry for ham radio use. They aren't needed where you don't have big turrets being swung around drawing the line voltage down each time.
>> In a normal ham station, a very simple supply, providing 180 VDC at a few miliamps is usually all that is required. A regulated 90 VDC is nice, but not absolutely necessary.
>> In fact, according to the manuals on these receivers, they work just fine with ONLY the 90 VDC source.
>> Anyway, with regard to the RAK, I used mine to copy 5 letter code grounps from the U.S. Navy VLF stations while they were still using CW, and before they switched to RATT. I was intending to work my way up to 30 wpm of steady error-free copy as I wanted to go to sea to be a ship-board radio operator.
>> I eventually got my 2nd Class Radio Telegraph license toward that end, but many things intervened and I never was able to complete that project.
>> The Navy station at Jim Creek in Washington state always came in to my station in Missoula, Montana like gang-busters 24/7/365. I think I could have used a wet-string as an antenna.
>> The first thing I noticed about my RAK was its amazing stability. It was rock steady. Once tuned to a signal, it remained there. One could literally hammer on the radio with a hammer and it never moved frequency.
>> The second, most amazing thing, to find was its "single-signal" selectivity. The "other side" of zero beat simply wasn't there....at all. Not even a hint of it.
>> I am still somewhat in the dark as to how this was done. I believe it was due to the "Q" of the tuned circuits in the radio. I understand that that value was around 1500, which is very unusual for such coils.
>> Maybe someone here can enlighten me how this was done.
>> With regard to my RAL, I traded a BC-348 with BC band ARC-5 "Q-5er" for it while I was a new General (actualy Conditional) class ham so that I could work 15 meters.
>> I used my RAL for some 12 years as my only station receiver, and never turned it off.
>> My ONLY complaint with it was the total lack of a real frequency readout. Using the tuning chart in the manual was difficult, but I got used to it.
>> Again, like the RAK, it was unconditionally stable.
>> I really liked its "quietness" and sensitivity.
>> I used it for every common mode at the time, CW, AM, SSB, RTTY. I could have used it for digital modes (other than CW and RTTY) if they had existed at the time.
>> Ken W7EKB
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From kgordon2006 at frontier.com  Sun Oct 22 14:21:56 2023
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Sun, 22 Oct 2023 11:21:56 -0700
Subject: [Milsurplus] RAK-RAL - the use of...
In-Reply-To: <4b23d15d-0e1d-4fa5-a822-fb9b1f4af6e7@ix.netcom.com>
References: <94886BC5-5A96-4438-B6C4-3EDFC138C31C@n1k.org>,
	<CAE7jS=1D3nyRsnKbo85mCdfauGv7G7X6p46BCOGL_wGKy8awHg@mail.gmail.com>,
	<4b23d15d-0e1d-4fa5-a822-fb9b1f4af6e7@ix.netcom.com>
Message-ID: <65356844.7070.34509632@kgordon2006.frontier.com>

> On 10/22/2023 12:18 AM, Ron De Silva wrote:
> > Yesterday evening with the trusty RAL5 and TDE2 on the big 10ft diam
> > mag loop....no problem for a QSO with? C6AXX Bahamas .
> > 
> > Radios refereed to as "hopeless relics" by one of the ham magazines
> > of the 60's.

Yes, obviouisly written by someone who never used one.

What a totally IDIOT statement! When I read that in one of CQ magazine's surplus pubs, I 
think it was in their Surplus Schematics publication, I was first, completely amazed at how 
uneducated the author was, and then I got angry.

Then I realized that getting angry was useless, and I then pitied the poor fool.

Well, I was given quite a collection of both RAKs and RALs some time ago by an old 
employer. When he died, he gave them all to me.

Some were VERY badly hacked, ATTEMPTED to be converted to solid-state. Several others 
were essentially untouched. I think he planned to use them for parts to keep those he was 
using in operation. Trouble is, those receivers are so reliable, the only parts needed from 
them were some of the meters, mostly the audio level meters, which seemed to fail when 
abused..

He used a number of RAKs, tuned to one or the other of the Navy's VLF stations, with 
signal-level recorders attached, for Sudden Enhancement of Signals research while studying 
sun-spots.

https://www.aavso.org/solar-sids

Although all those I have, other than those "converted" to solid-state, are restorable, none are 
"pristine". I intended to restore at least one RAL and one RAK for usei in my shack, but I am 
now too old (81) to attempt that. And they are too expensive to ship any more.

They are all taking up space in a dry shed on our property. I wish I could sell my entire 
collection of radio stuff....

Also, I really don't have the necessary room in my shack to have two 80 lb, big, radios on my 
operating bench.

Darn it.

Ken W7EKB

From taigh at twinbeech.com  Sun Oct 22 17:24:44 2023
From: taigh at twinbeech.com (taigh at twinbeech.com)
Date: Sun, 22 Oct 2023 14:24:44 -0700
Subject: [Milsurplus] DU & DW Loop Antenna
In-Reply-To: <65332248.170a0220.35c01.7f38@mx.google.com>
References: <65332248.170a0220.35c01.7f38@mx.google.com>
Message-ID: <015201da052e$2f0fcc90$8d2f65b0$@twinbeech.com>

We would like a DW but we can modify a DU as beggars can?t be choosers at this point. The tube will be about 4-5 feet long as the loop antenna is on the outside of the aircraft, on the centerline.

 

Thanks,

 

Taigh

 

Taigh Ramey

Vintage Aircraft Inc.

7432 C.E.Dixon Street

Stockton, California 95206

(209) 982-0273

(209) 982-4832 Fax

 <http://www.twinbeech.com/> www.twinbeech.com

KEEP 'EM FLYING...FOR HISTORY!

 

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Tom Brent
Sent: Friday, October 20, 2023 5:59 PM
To: milsurplus at mailman.qth.net
Subject: [Milsurplus] DU & DW Loop Antenna

 

The DU and DW are virtually identical except for the loop antenna mounting. The DU has it mounted directly on top of the tuning/control unit and was intended for installations where there was no metal fuselage surrounding it. The DW was intended for installations where the loop needed to be mounted on the outside of the fuselage (such as a PBY) and thus required a longer connecting tube between the control unit and antenna. The DW manual provides instructions for mounting the loop and support bearing on the outside of the aircraft and then cutting the tube to an appropriate length for connection to the control unit. The photo that was posted appears to show a DW as evidenced by the short tube, support bearing and cast aluminum handwheel used for rotation. I have both units and the manual for each although my DW is essentially a parts unit.

 

Happy tinkering!

 

Tom

 

Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986>  for Windows

 



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From ka8vit at ka8vit.com  Sun Oct 22 17:31:03 2023
From: ka8vit at ka8vit.com (Bill KA8VIT)
Date: Sun, 22 Oct 2023 17:31:03 -0400 (EDT)
Subject: [Milsurplus] RAK-RAL
In-Reply-To: <2024197151.318505.1697846673492@mail.yahoo.com>
References: <2024197151.318505.1697846673492.ref@mail.yahoo.com>
	<2024197151.318505.1697846673492@mail.yahoo.com>
Message-ID: <1712662805.1626441.1698010263516@email.ionos.com>

We have two pairs of RAL/RAK combinations aboard the boat.
 
You can see one RAL/RAK combination center left, and the RAK of the second combination to the right of it.
 
Above on the left is one of our RBS-3 receivers with a crossbar switches so we can pump audio to or from any compartment.
 
 
They are great TRF receivers.
 
If you check our our qrz.com page and scroll down you'll find links to some cool pictures and videos of the boat including some our trip to dry doc and back in 2021.
 
https://www.qrz.com/db/w8cod
 
73 - BILL KA8VIT / W8COD
 
 
 
====================================
Bill Chaikin, KA8VIT
Chief Radio Operator
WW2 Submarine USS COD SS-224 (NECO)
USS COD Amateur Radio Club - W8COD
 
ka8vit at ka8vit.com
http://www.usscod.org
====================================
 

> On 10/20/2023 8:04 PM EDT CL in NC via Milsurplus <milsurplus at mailman.qth.net mailto:milsurplus at mailman.qth.net> wrote:
>  
>  
> I too have both the RAK and RAL receivers up an running. The RAK on a homebrew supply, the RAL on the proper AC supply. I cut my ham radio teeth on a regen receiver in the '60's, and there is something to be said when you start there and slowly work up to something more modern. While I can't use the RAK during a power outage, I do have a couple VLF rigs that run on batteries, and I am probably the only person that looks forward to the power going out. If the outage is big enough, all the noise on the VLF bands goes away, and you can hear some things like NDB's you could only hear at night, BC stations hundreds of miles away, and other mysterious sigs, but the lack of racket is amazing.
>  
> Charlie, W4MEC in NC
> _____________________________________________________________
> 
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From kargo_cult at msn.com  Sun Oct 22 17:41:41 2023
From: kargo_cult at msn.com (Hubert Miller)
Date: Sun, 22 Oct 2023 21:41:41 +0000
Subject: [Milsurplus] RAK-RAL - the use of...
Message-ID: <CO6PR19MB543490DBBC38B6680A51D1B7E4D9A@CO6PR19MB5434.namprd19.prod.outlook.com>


The quote referred to was i believe, from the 'Surplus Schematics' collection book, which just had a photo and schematic. Sometimes the photo didn't quite match the radio and for large complex units the reduced size schematic was useless. I am for sone reason thinking the caption descriptions such as the referred to quote were the work of Tom Kneitel, but i am not going to look for said book right now to verify that. But it absolutely sounds like him. If you know Kneitel's style you know he was given to snappy, irreverent comments with a wise guy humor slant. But his actual electronics knowledge was minimal. There are other equipment descriptions in that book that are equally silly and just plain untrue, like regards the BC-375. Tom just made up some of this stuff and you were supposed to laff.
Hue Miller


Sent from my Verizon, Samsung Galaxy smartphone
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From arc5 at ix.netcom.com  Mon Oct 23 05:34:07 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Mon, 23 Oct 2023 04:34:07 -0500
Subject: [Milsurplus] One Cool Surprise- FuG-10.
Message-ID: <d1803c0e-d63c-4aff-a841-754a4a864302@ix.netcom.com>

A dear friend called me yesterday about an
estate sale just down the road from my place.
He said they had a big pile of ham radio stuff,
some old and some new.
I don't have room or time for much more these days,
but went to look anyway, and found this:

https://photos.app.goo.gl/FiQCJFztBJUgpWgz6

I've wanted one of these FuG-10 HF receivers
since I was a boy.  Dusty/dirty but intact.
Removed the cover to check the internals and it
looked pristine.  Nice surprise- some previous
owner took notes and placed them inside the
unit.  I was able to scan the crumbling sheets.
Only one of them was seriously decayed.

Photos and the scans of the sheets are at:

https://photos.app.goo.gl/rW7rXyFsZzwbuMqb9

Life and friends can make ya smile.

GL OM DE Dave AB5S

-- 
This email has been checked for viruses by Avast antivirus software.
www.avast.com

From frledda at att.net  Mon Oct 23 08:55:30 2023
From: frledda at att.net (Francesco Ledda)
Date: Mon, 23 Oct 2023 07:55:30 -0500
Subject: [Milsurplus] One Cool Surprise- FuG-10.
In-Reply-To: <d1803c0e-d63c-4aff-a841-754a4a864302@ix.netcom.com>
References: <d1803c0e-d63c-4aff-a841-754a4a864302@ix.netcom.com>
Message-ID: <DEA89B75-EB69-4BBE-9E2C-7961E2CFC8C3@att.net>

It looks like the German used lots of casting. Casting can be labor intensive, as some level of machining is a must to clean up the cast.

Best, Francesco K5URG



Sent from my iPad

> On Oct 23, 2023, at 04:33, David Stinson <arc5 at ix.netcom.com> wrote:
> 
> ?A dear friend called me yesterday about an
> estate sale just down the road from my place.
> He said they had a big pile of ham radio stuff,
> some old and some new.
> I don't have room or time for much more these days,
> but went to look anyway, and found this:
> 
> https://photos.app.goo.gl/FiQCJFztBJUgpWgz6
> 
> I've wanted one of these FuG-10 HF receivers
> since I was a boy.  Dusty/dirty but intact.
> Removed the cover to check the internals and it
> looked pristine.  Nice surprise- some previous
> owner took notes and placed them inside the
> unit.  I was able to scan the crumbling sheets.
> Only one of them was seriously decayed.
> 
> Photos and the scans of the sheets are at:
> 
> https://photos.app.goo.gl/rW7rXyFsZzwbuMqb9
> 
> Life and friends can make ya smile.
> 
> GL OM DE Dave AB5S
> 
> -- 
> This email has been checked for viruses by Avast antivirus software.
> www.avast.com
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


From holden7471 at msn.com  Mon Oct 23 14:03:20 2023
From: holden7471 at msn.com (howard holden)
Date: Mon, 23 Oct 2023 18:03:20 +0000
Subject: [Milsurplus] Classic Exchange CW Fall 2023
Message-ID: <SJ0PR12MB68784B9F2A9523A44BF10C1EC4D7A@SJ0PR12MB6878.namprd12.prod.outlook.com>

CX CW Sunday Oct 29 1300Z to Oct 30 0700Z Tuesday Oct 31 1300Z to Nov 1 0700Z

The CX is a no-pressure contest celebrating the older commercial and Home Brew equipment that was the pride and joy of ham shacks many decades ago. The object is to encourage restoration, operation and enjoyment of this older Classic equipment. You need not operate a Classic rig to participate in the CX. You may use any rig in the contest although new gear is a distinct scoring disadvantage as your multipliers are directly related to the age of the equipment you use! However, you can still work the "great ones" with modern equipment. There are two (2) entry categories per mode: ?Three or fewer receiver-transmitter pairs ?Four or more receiver-transmitter pairs.

Suggested CX Frequencies Khz  (+/- QRM)

CW         160M     80M       40M       20M       15M       10M       6M         2M
                1810       3545       7045       14045    21045    28045    50095    144100
                                                7100-
                                                7125

Full details at: http://classicexchange.org/announcments/CX_Rules.pdf
Questions? Contact Mark K3MSB e-mail: myscupper at gmail.com<mailto:myscupper at gmail.com>
Or Ron K2RP e-mail: Ron k2rp at arrl.net<mailto:k2rp at arrl.net>
Or contact me!
73, Howie WB2AWQ/7
WB2AWQ at ARRL.net<mailto:WB2AWQ at ARRL.net>


Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows

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From RAFANTINI at salisbury.edu  Mon Oct 23 14:22:17 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Mon, 23 Oct 2023 18:22:17 +0000
Subject: [Milsurplus] Able Archer 83 AAR
Message-ID: <DM8P220MB04720F1CB1B1390446C90D7BB8D8A@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

What was supposed to be achieved by this project?

Able Archer 83 is an annual event where we drag out Cold War radio equipment to a remote location and for twenty-four hours attempt to make contact using a special event call sign W3A Due to complications with our previous site this year we operated from the clandestine site, Supply Depo X-Ray located just outside Smyrna Delaware.


What was actually achieved?

We arrived at X-Ray on Friday. Equipment was unloaded, tents set up and everything was prepared for Saturday. We had rain almost all-day Friday well into the night and because of this I set the M151A1(mutt) up in a bay in one of the warehouses. Walt set up a tent for the primary station next to his S-250
The mutt was used for the RTTY, MMRCG, MRCA M&S nets and cross continent QSO on seventeen meters. The Primary station, a Harris RF-230 was in the tent along with a third axillary station located in the warehouse running a Harris URC-94
We were on the air for all the nets and at noon set off the huge CD Serine as the ceremonial starting of the event although we had W3A up and running all morning. Did attempt to do the cross-country contact with the west coast group at 1530 and 1600 local and operations shut down around noon the next day.


What aspects of the project work?

The new location was great, Subcomandante B (Name withheld for security reasons) was an ideal host. No noticeable radio noise, lots of space for antennas and facilities that included inside parking for the mutt, existing antennas and an auxiliary station that was there for our use. I set the mutt up in the warehouse being it was raining for the Saturday morning ops and was able to find a field table that I placed next to the mutt and operated RTTY from that, way more comfortable then being in the mutt and running RTTY. We had five stations check into the 7087 RTTY net with K4NYW as NCS the net was also copied by several others including the Battleship New Jersey. The 7296 MMRCG USB net at 1000 had K9WT as NCS with nine check in including the far-off detachment of our operation W9A, NCS allowed us time to work directly between W3A and W9A for a short QSO.
WB2JWU was NCS for the Moose &Squirrel net on 5357 with fourteen participants.  Some of our contingent decided to set off the CD serine at noon, very loud. afterwards on air operations started with the primary and auxiliary station on forty and twenty meters. Around fifteen hundred started attempting the cross-country test again. Starting with 18.145 but also using 18.143 and 18.150 did several QSO but nothing beyond the Mississippi. Was able to work K4NYW somewhat and did attempt to talk to KW1I after working him on forty but no love there. Did work around half a dozen stations including 9Z4Y in Trinidad but looks like the cross-country thing will be put off until next year. I do not have the count for the number of stations worked by the primary but know we had quite a number, although there were issues with the NY QSO Party and them sucking up almost the entire twenty-meter band.


What didn't work and why?

I threw together a seventeen-meter sloper dipole that I ran up the antenna mast with the idea that it would give me a little more gain on seventeen, although I did work several stations with the new antenna was not able to adequately copy anything that was wanted. After sixteen hundred decide to go with the vertical on the mutt.
When I first transferred to the whip found it would not load due to proximity to the metal roof of the building so had to drop the mast, disconnect shore power and drive the mutt away from the building in order to use the whip antenna.

What would you change if given a second chance?

Work harder not smarter, no more antennas cut for seventeen. From now on go with what has worked in the past and use the fourteen-foot vertical on the mutt. That antenna preforms well on seventeen and twenty meters so if it's not broke don't fix it. We did have some fun where Walt dragged out his Clansman backpack and in addition to working me also worked a couple others on seventeen so starting to think that vertical is the answer for seventeen meters.
Bigger power supply for the mutt. I had the GRC-106 running along with the VRC-12 set up for monitoring 51.0 In the process of moving away from the building I left the 106 running. Disconnected the AC power so everything was running from the batteries, dropped and moved the mast from the front of the mutt and then after checking to see that everything was clear jumped in the mutt and found the batteries were just about dead and unable to start the mutt. Turned off the radios and everything but the power supply is just not big enough to keep the batteries charged if you were doing a lot of transmitting. May also be that the batteries are six years old at least and that they need to be replaced.


Submitted by Ray F/KA3EKH

Addendum:

Stations worked on RTTY Net 7087 at 0900

K4NYW, W1AEA, K3TZJ, KD2GFM and KA4RSZ

Stations worked on MMRCG 7296 Net at 1000
K9WT, KI0PF, WF2U, K3TZJ, KW1I, KD2GFM, KA3TUR, W9A and WA3YRE

Stations worked on MRCA M&S Net

WB2JWU, K1QAR, N1SNG, N2MS, KD3HT, K2TZJ, WA2EJT, WA3YRE, W1AEA, W2RBA, KW1I, W1QL, KD2GFM and WA2WOL

Special mention! Ron K3TZJ and Ken KD2GDFM worked all three nets.

Station worked on Seventeen Meters

K4HIL, K4NYW, AC9BJ, WA3UKC and 9Z4Y


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From n3bjdx at gmail.com  Mon Oct 23 14:27:52 2023
From: n3bjdx at gmail.com (Alan Fryer)
Date: Mon, 23 Oct 2023 14:27:52 -0400
Subject: [Milsurplus] Milsurplus Digest, Vol 234, Issue 57
In-Reply-To: <mailman.8041.1697949795.25502.milsurplus@mailman.qth.net>
References: <mailman.8041.1697949795.25502.milsurplus@mailman.qth.net>
Message-ID: <CAEkeX1a+nRSkPYCguP1=YgxE6GPk2JjkQKX0RmGGwZXGMhjJbg@mail.gmail.com>

Ken's comments about "single signal" performance with the RAL reminded me
of an article that explained how very precise control of regeneration can
create that effect.  IIRC, the theory goes that one sideband was just
barely in the oscillating mode (maximum selectivity) and the other sideband
was not in oscillation, attenuating it.  Regeneration control is frequency
sensitive, maybe this is an optimization of that ? .  I'll dig up the
article and reference it to you all.

Does this make any sense ?

Alan, N3BJ

On Sun, Oct 22, 2023 at 12:43?AM <milsurplus-request at mailman.qth.net> wrote:

> Send Milsurplus mailing list submissions to
>         milsurplus at mailman.qth.net
>
> To subscribe or unsubscribe via the World Wide Web, visit
>         http://mailman.qth.net/mailman/listinfo/milsurplus
> or, via email, send a message with subject or body 'help' to
>         milsurplus-request at mailman.qth.net
>
> You can reach the person managing the list at
>         milsurplus-owner at mailman.qth.net
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Milsurplus digest..."
>
>
> Today's Topics:
>
>    1. Re: [MMRCG] Refurbed (?) U.S. Navy RAS Receiver (Konrad Werzner)
>    2. RAL Receiver (David Stinson)
>    3. Re: RAK-RAL - the use of... (Kenneth G. Gordon)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 21 Oct 2023 16:35:58 -0500
> From: Konrad Werzner <usstexasradio at gmail.com>
> To: Jim Whartenby <old_radio at aol.com>
> Cc: "milsurplus at mailman" <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
> Message-ID:
>         <
> CA++10jSz1211eka-g6g9Ob5J93vtUbCnoT-G9FupqyiEHUh7ng at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Digging through the DTIC database, I found one of the benchmarking
> documents for the RAS. It's labeled "XRAS" since it was still experimental
> at the time and appears to fail in a lot of Navy benchmarking requirements.
> It's interesting to note that this is what caused the eventually approved
> RAS to use of the 6V6G and 6F8G tubes compared to other HROs. Enjoy
> reading:
>
> https://apps.dtic.mil/sti/trecms/pdf/AD1158726.pdf
>
> On Mon, Oct 16, 2023 at 4:47?PM Jim Whartenby via Milsurplus <
> milsurplus at mailman.qth.net> wrote:
>
> > I believe coaxial cable was invented some 50 years earlier (1880) by
> > Oliver Heaviside who also held the original patent.  His biography is
> worth
> > a look, talk about being ahead of your time!
> > Jim
> >
> > Logic: Method used to arrive at the wrong conclusion, with confidence.
> > Murphy
> >
> >
> > On Monday, October 16, 2023 at 03:38:17 PM CDT, howard holden <
> > holden7471 at msn.com> wrote:
> >
> >
> > Very specifically, submarines used coax cables. Don?t recall other ships
> > using, but I can?t imagine why not. Coax was invented in 1929 I think.
> >
> >
> >
> > Howie WB2AWQ
> >
> >
> >
> > Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> > Windows
> >
> >
> >
> > *From: *Hubert Miller <Kargo_cult at msn.com>
> > *Sent: *Monday, October 16, 2023 1:27 PM
> > *To: *milsurplus at mailman <milsurplus at mailman.qth.net>
> > *Subject: *Re: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver
> >
> >
> >
> > I don't think any WWII era ship used coax for HF.
> > Or, what am i missing?
> > So is there a coax - single wire conversion needed?
> > -Hue Miller
> > ______________________________________________________________
> > Milsurplus mailing list
> > Home:
> >
> https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Fmilsurplus&data=05%7C01%7C%7C4f01c1eb57204d5b2ad408dbce865543%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638330848582038273%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=ecrmXguAEl94rluR5gWbOTNnAN5R7X%2B6k1wmJRgm%2F0k%3D&reserved=0
> > <http://mailman.qth.net/mailman/listinfo/milsurplus>
> > Help:
> >
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> > <http://mailman.qth.net/mmfaq.htm>
> > Post: mailto:Milsurplus at mailman.qth.net <Milsurplus at mailman.qth.net>
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> > <http://www.qsl.net/donate.html>
> >
> >
> > ______________________________________________________________
> > Milsurplus mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/milsurplus
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> > Milsurplus mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/milsurplus
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>
> ------------------------------
>
> Message: 2
> Date: Sat, 21 Oct 2023 16:57:09 -0500
> From: David Stinson <arc5 at ix.netcom.com>
> To: "milsurplus at mailman" <milsurplus at mailman.qth.net>, MMRCG
>         <MMRCG at groups.io>
> Subject: [Milsurplus] RAL Receiver
> Message-ID: <7f94ed70-dfde-46c9-a291-9c900c1d034e at ix.netcom.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> I'm looking for a specific RAL receiver owner.
> One who is either using his RAL, or has it on
> his bench and regularly works to put it in
> operation.
>
> That person's RAL is missing its case.
>
> I do NOT want to know about those who have an
> RAL in a lost corner of the barn since 1968,
> down in the often-flooding basement, or
> down near the bottom of the "get around to it"
> pile in the garage since that hamfest 17 years ago.
>
> I'm looking for the person who actually wants to
> use his RAL and is actually taking steps to accomplish it.
>
> TNX OM DE Dave AB5S
>
> --
> This email has been checked for viruses by Avast antivirus software.
> www.avast.com
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 21 Oct 2023 21:42:57 -0700
> From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
> To: Milsurplus <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] RAK-RAL - the use of...
> Message-ID: <6534A851.25581.3162C63B at kgordon2006.frontier.com>
> Content-Type: text/plain; charset="us-ascii"
>
> I have made somewhat extensive use of both the RAL and the RAK receivers
> and would like
> to share some of my experiences with both.
>
> Both of my receivers were being operated from the original power supplies,
> which are really
> too big and too power hungry for ham radio use. They aren't needed where
> you don't have
> big turrets being swung around drawing the line voltage down each time.
>
> In a normal ham station, a very simple supply, providing 180 VDC at a few
> miliamps is
> usually all that is required. A regulated 90 VDC is nice, but not
> absolutely necessary.
>
> In fact, according to the manuals on these receivers, they work just fine
> with ONLY the 90
> VDC source.
>
> Anyway, with regard to the RAK, I used mine to copy 5 letter code grounps
> from the U.S.
> Navy VLF stations while they were still using CW, and before they switched
> to RATT. I was
> intending to work my way up to 30 wpm of steady error-free copy as I
> wanted to go to sea to
> be a ship-board radio operator.
>
> I eventually got my 2nd Class Radio Telegraph license toward that end, but
> many things
> intervened and I never was able to complete that project.
>
> The Navy station at Jim Creek in Washington state always came in to my
> station in Missoula,
> Montana like gang-busters 24/7/365. I think I could have used a wet-string
> as an antenna.
>
> The first thing I noticed about my RAK was its amazing stability. It was
> rock steady. Once
> tuned to a signal, it remained there. One could literally hammer on the
> radio with a hammer
> and it never moved frequency.
>
> The second, most amazing thing, to find was its "single-signal"
> selectivity. The "other side" of
> zero beat simply wasn't there....at all. Not even a hint of it.
>
> I am still somewhat in the dark as to how this was done. I believe it was
> due to the "Q" of the
> tuned circuits in the radio. I understand that that value was around 1500,
> which is very
> unusual for such coils.
>
> Maybe someone here can enlighten me how this was done.
>
> With regard to my RAL, I traded a BC-348 with BC band ARC-5 "Q-5er" for it
> while I was a
> new General (actualy Conditional) class ham so that I could work 15 meters.
>
> I used my RAL for some 12 years as my only station receiver, and never
> turned it off.
>
> My ONLY complaint with it was the total lack of a real frequency readout.
> Using the tuning
> chart in the manual was difficult, but I got used to it.
>
> Again, like the RAK, it was unconditionally stable.
>
> I really liked its "quietness" and sensitivity.
>
> I used it for every common mode at the time, CW, AM, SSB, RTTY. I could
> have used it for
> digital modes (other than CW and RTTY) if they had existed at the time.
>
> Ken W7EKB
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> >
>
> ------------------------------
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
>
> End of Milsurplus Digest, Vol 234, Issue 57
> *******************************************
>
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From n3bjdx at gmail.com  Mon Oct 23 14:35:17 2023
From: n3bjdx at gmail.com (Alan Fryer)
Date: Mon, 23 Oct 2023 14:35:17 -0400
Subject: [Milsurplus] RAL - RAK single signal
Message-ID: <CAEkeX1b+0K-PyJJJQbgPKV0aQv1HNdHk4iRUk1GcUwAJNFeicw@mail.gmail.com>

Ken's comments about "single signal" performance with the RAL reminded me
of an article that explained how very precise control of regeneration can
create that effect.  IIRC, the theory goes that one sideband was just
barely in the oscillating mode (maximum selectivity) and the other sideband
was not in oscillation, attenuating it.  Regeneration control is frequency
sensitive, maybe this is an optimization of that ? .  I'll dig up the
article and reference it to you all.

Does this make any sense ?

Alan, N3BJ
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From kgordon2006 at frontier.com  Mon Oct 23 15:40:33 2023
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Mon, 23 Oct 2023 12:40:33 -0700
Subject: [Milsurplus] RAL - RAK single signal
In-Reply-To: <CAEkeX1b+0K-PyJJJQbgPKV0aQv1HNdHk4iRUk1GcUwAJNFeicw@mail.gmail.com>
References: <CAEkeX1b+0K-PyJJJQbgPKV0aQv1HNdHk4iRUk1GcUwAJNFeicw@mail.gmail.com>
Message-ID: <6536CC31.22966.39BEEBAC@kgordon2006.frontier.com>

On 23 Oct 2023 at 14:35, Alan Fryer wrote:

> 
> Ken's comments about "single signal" performance with the RAL reminded
> me of an article that explained how very precise control of
> regeneration can create that effect.? IIRC, the theory goes that one
> sideband was just barely in the oscillating mode (maximum selectivity)
> and the other sideband was not in oscillation, attenuating it.?
> Regeneration control is frequency sensitive,?maybe this is an
> optimization of that ? .? I'll dig up the article and reference it to
> you all. 
> 
> Does this make any sense ?

Well, yes, but I was talking about the RAK, not the RAL. 

I never noticed any "single signal" effect with my RAL. The RAL is HF, 300 Kc to 23 Mc. The 
RAK is VLF, 14 Kc up to 600 Kc.

With my RAK, the "other side" of zero-beat simply isn't there...at all.

Ken W7EKB



From n3bjdx at gmail.com  Mon Oct 23 16:02:44 2023
From: n3bjdx at gmail.com (Alan Fryer)
Date: Mon, 23 Oct 2023 16:02:44 -0400
Subject: [Milsurplus] RAL - RAK single signal
In-Reply-To: <6536CC31.22966.39BEEBAC@kgordon2006.frontier.com>
References: <CAEkeX1b+0K-PyJJJQbgPKV0aQv1HNdHk4iRUk1GcUwAJNFeicw@mail.gmail.com>
	<6536CC31.22966.39BEEBAC@kgordon2006.frontier.com>
Message-ID: <CAEkeX1bfjrQHb36mdVOo_MQUebjHyJOm9u54_h_ikbFXQP3W6Q@mail.gmail.com>

OK, Ken, thanks for the reply.  Have enjoyed the articles on your website
for many years. I stand corrected, you were talking about the RAK.

The article I was referencing is titled "Single Signal Reflexed
Regenerative Receiver" by SV3ORA. A web search brings it up.

He uses some old slide pots that have a worm gear and knob for regen
control.  Old analog TV tuner parts.

Your comments really got my notice !

Best 73,

Alan, N3BJ
































On Mon, Oct 23, 2023 at 3:40?PM Kenneth G. Gordon <kgordon2006 at frontier.com>
wrote:

> On 23 Oct 2023 at 14:35, Alan Fryer wrote:
>
> >
> > Ken's comments about "single signal" performance with the RAL reminded
> > me of an article that explained how very precise control of
> > regeneration can create that effect.  IIRC, the theory goes that one
> > sideband was just barely in the oscillating mode (maximum selectivity)
> > and the other sideband was not in oscillation, attenuating it.
> > Regeneration control is frequency sensitive, maybe this is an
> > optimization of that ? .  I'll dig up the article and reference it to
> > you all.
> >
> > Does this make any sense ?
>
> Well, yes, but I was talking about the RAK, not the RAL.
>
> I never noticed any "single signal" effect with my RAL. The RAL is HF, 300
> Kc to 23 Mc. The
> RAK is VLF, 14 Kc up to 600 Kc.
>
> With my RAK, the "other side" of zero-beat simply isn't there...at all.
>
> Ken W7EKB
>
>
>
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From Kargo_cult at msn.com  Mon Oct 23 16:08:46 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 23 Oct 2023 20:08:46 +0000
Subject: [Milsurplus] RAL - RAK single signal
In-Reply-To: <CAEkeX1b+0K-PyJJJQbgPKV0aQv1HNdHk4iRUk1GcUwAJNFeicw@mail.gmail.com>
References: <CAEkeX1b+0K-PyJJJQbgPKV0aQv1HNdHk4iRUk1GcUwAJNFeicw@mail.gmail.com>
Message-ID: <CO6PR19MB54344CE17F4E5190031791AAE4D8A@CO6PR19MB5434.namprd19.prod.outlook.com>

No, single signal reception with a regen doesn't make sense, sorry. 
One exception, possibly: there was an internet interest group for regenerative receivers. This is now gone to Facebook only. 
Maybe 5, 6 years ago there was a fellow in NZ or OZ who posted about a crystal controlled ( single frequency, of course ) 
regen which did attenuate one sideband. But that's with a quartz as the control element, where you can maybe take 
advantage of a "phasing notch". Otherwise, it just doesn't make sense to me that one sideband is oscillating and the other, not. 
-Hue Miller

From Kargo_cult at msn.com  Mon Oct 23 16:15:33 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 23 Oct 2023 20:15:33 +0000
Subject: [Milsurplus] RAL - RAK single signal
In-Reply-To: <CAEkeX1bfjrQHb36mdVOo_MQUebjHyJOm9u54_h_ikbFXQP3W6Q@mail.gmail.com>
References: <CAEkeX1b+0K-PyJJJQbgPKV0aQv1HNdHk4iRUk1GcUwAJNFeicw@mail.gmail.com>
	<6536CC31.22966.39BEEBAC@kgordon2006.frontier.com>
	<CAEkeX1bfjrQHb36mdVOo_MQUebjHyJOm9u54_h_ikbFXQP3W6Q@mail.gmail.com>
Message-ID: <CO6PR19MB5434D70F4D56369EB851F2EAE4D8A@CO6PR19MB5434.namprd19.prod.outlook.com>

Thanks, Alan, for this regen receiver reference. That is a gem of an article. 
-Hue Miller 





























On Mon, Oct 23, 2023 at 3:40?PM Kenneth G. Gordon <mailto:kgordon2006 at frontier.com> wrote:
On 23 Oct 2023 at 14:35, Alan Fryer wrote:

> 
> Ken's comments about "single signal" performance with the RAL reminded
> me of an article that explained how very precise control of
> regeneration can create that effect.? IIRC, the theory goes that one
> sideband was just barely in the oscillating mode (maximum selectivity)
> and the other sideband was not in oscillation, attenuating it.?
> Regeneration control is frequency sensitive,?maybe this is an
> optimization of that ? .? I'll dig up the article and reference it to
> you all. 
> 
> Does this make any sense ?

Well, yes, but I was talking about the RAK, not the RAL. 

I never noticed any "single signal" effect with my RAL. The RAL is HF, 300 Kc to 23 Mc. The 
RAK is VLF, 14 Kc up to 600 Kc.

With my RAK, the "other side" of zero-beat simply isn't there...at all.

Ken W7EKB


From navy.radio at gmail.com  Tue Oct 24 10:07:46 2023
From: navy.radio at gmail.com (Nick England)
Date: Tue, 24 Oct 2023 10:07:46 -0400
Subject: [Milsurplus] CraigsList Lindenhurst NY - GRC-106, PRC-10, PRC-77,
	more
Message-ID: <CAB55hNf0taa7iPGR06FjLS0CfYe3AtKoxo2XG6LDaidSPWJVSg@mail.gmail.com>

Not mine, no connection, I know nothings else, etc.
https://longisland.craigslist.org/ele/d/lindenhurst-rt-524-rt-176-rt-841-rt-246/7675189781.html
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From arc5 at ix.netcom.com  Tue Oct 24 11:28:52 2023
From: arc5 at ix.netcom.com (arc5 at ix.netcom.com)
Date: Tue, 24 Oct 2023 10:28:52 -0500
Subject: [Milsurplus] CraigsList Lindenhurst NY - GRC-106, PRC-10, PRC-77,
 more
Message-ID: <6d005746-132b-4a59-abee-f7ddd0e1f0fd@localhost>

Another guy pricing via eBay fantasy.
Ebay listing prices feed on each other's delusions. What matters is the "Sold" prices; that's a very different story.
I wonder if these guys don't know where to find the "Sold" prices, or do they just cherish the delusions?
Dave S.

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From kb8tq at n1k.org  Tue Oct 24 11:36:15 2023
From: kb8tq at n1k.org (Bob Camp)
Date: Tue, 24 Oct 2023 11:36:15 -0400
Subject: [Milsurplus] CraigsList Lindenhurst NY - GRC-106, PRC-10, PRC-77,
 more
In-Reply-To: <6d005746-132b-4a59-abee-f7ddd0e1f0fd@localhost>
References: <6d005746-132b-4a59-abee-f7ddd0e1f0fd@localhost>
Message-ID: <2EBB270E-60FB-4372-B466-45436A8557D4@n1k.org>

Hi

With a ?we are resellers, that?s all we do? note at the bottom of the listing ? they may not have the remotest idea of what they actually are selling or how to sell it. 

Bob

> On Oct 24, 2023, at 11:28?AM, arc5 at ix.netcom.com wrote:
> 
> Another guy pricing via eBay fantasy.
> Ebay listing prices feed on each other's delusions. What matters is the "Sold" prices; that's a very different story.  
> I wonder if these guys don't know where to find the "Sold" prices, or do they just cherish the delusions?
> Dave S.
>  <https://longisland.craigslist.org/ele/d/lindenhurst-rt-524-rt-176-rt-841-rt-246/7675189781.html>
> 
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

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From elden_meyer at yahoo.com  Wed Oct 25 08:04:45 2023
From: elden_meyer at yahoo.com (elden meyer)
Date: Wed, 25 Oct 2023 12:04:45 +0000 (UTC)
Subject: [Milsurplus] RA-16 power supply
References: <717348684.1227662.1698235485735.ref@mail.yahoo.com>
Message-ID: <717348684.1227662.1698235485735@mail.yahoo.com>

Good Morning,?
The recent discussion of the RAS receiver reminded me that I had a?power supply in the jumble that looked similar to that for the RAS.
This is designated RA-16 by the Signal Corps, and was made by Sylvania in 1935.?Some poor photos are attached. What equipment was this used with??
Does anyone need it? Many of the original parts are missing thanks to a previous owner.
Elden?
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From RAFANTINI at salisbury.edu  Wed Oct 25 09:29:46 2023
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Wed, 25 Oct 2023 13:29:46 +0000
Subject: [Milsurplus] Able Archer 83 video
Message-ID: <DM8P220MB04728AC96FD4602EE0E0CDDBB8DEA@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Just put up a short video of this years Able Archer 83 at Depo X-Ray:

https://youtu.be/b9_iripCOPk

Gives a short overview of this year's event.

Ray F/KA3EKH

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From ersmar at verizon.net  Fri Oct 27 12:59:00 2023
From: ersmar at verizon.net (Gene Smar)
Date: Fri, 27 Oct 2023 16:59:00 +0000 (UTC)
Subject: [Milsurplus] Fw: USS Shenandoah at 100
In-Reply-To: <896cc03b6a014e3984cb9a30b96e20a6@smithsonianonline.org>
References: <896cc03b6a014e3984cb9a30b96e20a6@smithsonianonline.org>
Message-ID: <1318588796.17294.1698425940698@mail.yahoo.com>

FYI for all you aviation aficionados out there.?
73 deGene Smar AD3F?

Sent from my Radio Shack TRS-80 model 100 laptop 
 
   ----- Forwarded Message ----- From: "National Air and Space Museum" <whatsup at smithsonianonline.org> To: "ersmar at verizon.net" <ersmar at verizon.net> Cc:  Sent: Thu, Oct 26, 2023 at 4:55 PM Subject: USS Shenandoah at 100   
Smithsonian
 

|  

 
|  |
|  |
| 
One hundred years ago, the christening of the USS Shenandoah marked the official start of the Era of the Rigid Airship
In October 1923, the airship ZR-1 was officially christened the USS Shenandoah, a name that was thought to translate to ?daughter of the stars.? The USS Shenandoah marked many firsts for the United States. It was the first rigid airship to be inflated with helium, a rare lifting gas that was safer than the more common hydrogen. It was also the first rigid airship to be constructed by the United States. 

Many saw rigid airships as the future of aviation and dreamed of a time when an entire fleet would sail the skies. Although this dream did not become a reality, the USS Shenandoah did pave the way forward for future rigid airship pilots and crews, offering an invaluable platform for training.

 To mark this important moment in aviation history, we've launched an interactive web experience that looks at the history of the Shenandoah. The website features recently-digitized artifacts from the Museum's collection and an interactive map that uses a first-person account to trace the airship's 1924 North American crossing.  |
| 
| Start Exploring |

 |
|  |
| 
This experience is interactive and may not work with assistive technologies. While we work to make the interactive experience more accessible, you can find an accessible version of this experience here.
  |
| 
 
  |

 
|  
|   |
|  
|    DONATE    |

  |
|   |
|  |
|   |
| National Air and Space Museum
6th St. and Independence Avenue, S.W., Washington, DC 20560

Steven F. Udvar-Hazy Center
14390 Air and Space Museum Parkway, Chantilly, VA 20151 |
|   Contact Us 
   |    Unsubscribe    |    Privacy Policy    |
|   |

 |

 
|   |

  |

  
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From arc5 at ix.netcom.com  Fri Oct 27 23:11:37 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Fri, 27 Oct 2023 22:11:37 -0500
Subject: [Milsurplus] Wanted: Western Electric Aircraft Receiver.
Message-ID: <a43e3d23-2e21-49e7-981c-e397eb52dfb7@ix.netcom.com>

I am seeking this Western Electric receiver
in clean, unmolested condition:

https://photos.app.goo.gl/utVXoUGs1iBtQNm96
https://photos.app.goo.gl/dCwtgXCezj3P4Mzu8

Cash or trade.

TNX DE Dave AB5S


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From arc5 at ix.netcom.com  Sun Oct 29 21:17:36 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 29 Oct 2023 20:17:36 -0500
Subject: [Milsurplus] WWII MAB-DAV-DAV2 Evolution
Message-ID: <671be51f-533f-4cf7-9ba1-7f5b4fffab9d@ix.netcom.com>

WWII MAB-DAV-DAV2 Evolution.

I'm not the MAB Comm / DAV DFer expert.
Sharing photos of this stuff I have,
hoping someone might chime-in with insights.

Regular MAB set many of you will recognize:
https://photos.app.goo.gl/WmEnqHQG2w4JrkKk7
https://photos.app.goo.gl/McttvQEm7v2BBcFa8

However, there is an unusual marking on the top
of this MAB:
https://photos.app.goo.gl/McttvQEm7v2BBcFa8
https://photos.app.goo.gl/cAM2dXG51w2LG2bM8

There is an adaptor which fits between the
MAB top and the MAB Battery/RF Unit case
which converts the MAB into a
Direction-Finding DAV:
https://photos.app.goo.gl/EB1PJMjpvvwZjmqu5
https://photos.app.goo.gl/s8bktUm4mrKpt2BG9
https://photos.app.goo.gl/H1eLQ1ktQk6zu8mN8
https://photos.app.goo.gl/rr1ntkr29XHc5uMy9
https://photos.app.goo.gl/VStxobTUyk142pycA

In this photo, the MAB top (right) will be
fitted on top of the DAV adaptor (left):
https://photos.app.goo.gl/rcjrbegYZWRH8T11A
The MAB five-pin battery connector stowes
in the recess just above the middle of the
adaptor.

In this photo, the MAB top is attached to the
DAV adaptor and the vibrator pack is installed.
To the left, one can see that an RF unit with
an extra 6-pin connector would be used. I do
not have one of these original DAV RF units:
https://photos.app.goo.gl/fDXc7vUE5GjTaFby5
https://photos.app.goo.gl/oEWUX9Tmej9vBfaw6

The original DAV unit assembled:
https://photos.app.goo.gl/CnfHbEXPoechKg1b9

I don't know why the DAV was repackaged into
the DAV-2, but it is a tougher build and doesn't
require the "special" RF unit.  I have two fairly
complete and one "parter."  I have done no
work on getting them operational.
https://photos.app.goo.gl/MSvyDwstNpnGk8hM6
https://photos.app.goo.gl/Gan16Ft7a5fpZhV76
https://photos.app.goo.gl/DHNjuE7ag7DPzo1GA
https://photos.app.goo.gl/tFF2sJfVcWMYgCxNA
https://photos.app.goo.gl/WiPBF8vPvfUFe2Rf8

All of this is available as one lot in trade
for a clean/complete/unmolested AN/TRC-7
plus a bit of help with shipping.

TNX ES 73 DE Dave AB5S



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From arc5 at ix.netcom.com  Sun Oct 29 22:05:13 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 29 Oct 2023 21:05:13 -0500
Subject: [Milsurplus] German WWII Siemens K32 GWB Tubes
Message-ID: <42953356-09be-4682-8b94-3e5ce71e334a@ix.netcom.com>

WWII German Siemens KG32 GWB Luftwaffe Morale Receiver.
Photos:
https://photos.app.goo.gl/yoGkPfrfhYKoZqCo6

The schematic in the photos lists valves:
ECH11, EF11, EBF11, 4SH1,EZ11

Another reference lists:
DCH11, DF11, DAF11, DY11

Are they really all Cold-Cathode valves?

Is there someone with experience on this radio?
Where can one find these valves?

TNX OM ES 73 DE Dave AB5S



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From Kargo_cult at msn.com  Sun Oct 29 23:16:29 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 30 Oct 2023 03:16:29 +0000
Subject: [Milsurplus] German WWII Siemens K32 GWB Tubes
In-Reply-To: <42953356-09be-4682-8b94-3e5ce71e334a@ix.netcom.com>
References: <42953356-09be-4682-8b94-3e5ce71e334a@ix.netcom.com>
Message-ID: <CO6PR19MB54342E484F45CB1A5F480C85E4A1A@CO6PR19MB5434.namprd19.prod.outlook.com>

Radio was 1.5 DC tubes, just like our run of the mill 1.5 volt battery tubes, but of course now more $expensive$
I have seen this radio adapted to use USA tubes, but never modified with the E series 6 volt tubes. Umbau  = modification. 
-Hue Miller 


From jmfranke at cox.net  Tue Oct 31 13:12:50 2023
From: jmfranke at cox.net (John Franke)
Date: Tue, 31 Oct 2023 10:12:50 -0700
Subject: [Milsurplus] Checking in
Message-ID: <AABUWCPNVAYS6GV2@smtpout04.vgs.untd.com>

How are you doing on this beautiful day. Sorry to borther you.
I've an issue when ordering from Amazon. Do you shop on Amazon?


From wa1tej at yahoo.com  Tue Oct 31 13:27:45 2023
From: wa1tej at yahoo.com (Jack Sullivan)
Date: Tue, 31 Oct 2023 17:27:45 +0000 (UTC)
Subject: [Milsurplus] Nazi FuG-25a relic electric motor
References: <335873043.1401192.1698773265626.ref@mail.yahoo.com>
Message-ID: <335873043.1401192.1698773265626@mail.yahoo.com>

Back years ago I was collecting WWII IFF gear & got a virgin FuG-25a IFF xpdr. This was used extensively by night fighters on the Kammhuber Line. I lost interest & sold it but I still have a relic electric motor from a FuG-25a if anyone is interested email me direct please. Tnx!
73 de
JackW2INF
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From smithab11 at comcast.net  Tue Oct 31 16:38:47 2023
From: smithab11 at comcast.net (B. Smith)
Date: Tue, 31 Oct 2023 16:38:47 -0400
Subject: [Milsurplus] Checking in
In-Reply-To: <AABUWCPNVAYS6GV2@smtpout04.vgs.untd.com>
References: <AABUWCPNVAYS6GV2@smtpout04.vgs.untd.com>
Message-ID: <3ccd3174-d0cb-b11e-a03f-a0f8efb0369d@comcast.net>

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From Kargo_cult at msn.com  Tue Oct 31 17:25:47 2023
From: Kargo_cult at msn.com (Hubert Miller)
Date: Tue, 31 Oct 2023 21:25:47 +0000
Subject: [Milsurplus] Checking in
In-Reply-To: <3ccd3174-d0cb-b11e-a03f-a0f8efb0369d@comcast.net>
References: <AABUWCPNVAYS6GV2@smtpout04.vgs.untd.com>
	<3ccd3174-d0cb-b11e-a03f-a0f8efb0369d@comcast.net>
Message-ID: <CO6PR19MB54347A19FE2D960E71B1D2EFE4A0A@CO6PR19MB5434.namprd19.prod.outlook.com>


Happy Halloween Milsurplus
k4che
[cid:image001.jpg at 01DA0C06.20D184F0]

What is that ? I?m guessing a Northern Radio tty exciter ?
-Hue Miller


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From holden7471 at msn.com  Tue Oct 31 19:56:26 2023
From: holden7471 at msn.com (howard holden)
Date: Tue, 31 Oct 2023 23:56:26 +0000
Subject: [Milsurplus] Checking in
In-Reply-To: <3ccd3174-d0cb-b11e-a03f-a0f8efb0369d@comcast.net>
References: <AABUWCPNVAYS6GV2@smtpout04.vgs.untd.com>
	<3ccd3174-d0cb-b11e-a03f-a0f8efb0369d@comcast.net>
Message-ID: <SJ0PR12MB68782B590289C6F1CE54178AC4A0A@SJ0PR12MB6878.namprd12.prod.outlook.com>

U can send some of those Reese?s Pieces this way??.;)

Sent from my iPhone

> On Oct 31, 2023, at 13:38, B. Smith <smithab11 at comcast.net> wrote:
> 
> ? Happy Halloween Milsurplus
> k4che
> <happyhalK4CHE.jpg>
> 
> 
> <happyhalK4CHE.jpg>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From arc5 at ix.netcom.com  Tue Oct 31 21:34:05 2023
From: arc5 at ix.netcom.com (David Stinson)
Date: Tue, 31 Oct 2023 20:34:05 -0500
Subject: [Milsurplus] Checking in
In-Reply-To: <CO6PR19MB54347A19FE2D960E71B1D2EFE4A0A@CO6PR19MB5434.namprd19.prod.outlook.com>
References: <AABUWCPNVAYS6GV2@smtpout04.vgs.untd.com>
	<3ccd3174-d0cb-b11e-a03f-a0f8efb0369d@comcast.net>
	<CO6PR19MB54347A19FE2D960E71B1D2EFE4A0A@CO6PR19MB5434.namprd19.prod.outlook.com>
Message-ID: <3fda30e3-e080-45a6-bd0e-55f761d29385@ix.netcom.com>



On 10/31/2023 4:25 PM, Hubert Miller wrote:
> Happy Halloween Milsurplus
> k4che
> 
> What is that ? 

It's a Boo-Tronics Screamer 1313.




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