From farmer.rob.flory at gmail.com  Tue Oct  1 06:35:38 2024
From: farmer.rob.flory at gmail.com (Rob Flory)
Date: Tue, 1 Oct 2024 06:35:38 -0400
Subject: [Milsurplus] [MRCA] QRP Military Radio Magic
In-Reply-To: <CAG9SHKMAXJRtzZY3gMwSOj_rt0=B0DEeNpyFh+3pBs3h7Ckpsg@mail.gmail.com>
References: <CAFcNxxUBz_1E1rBi3uF=CLNUCNn98T-zEYYua6BhETwKxsAdHQ@mail.gmail.com>
	<ec13e05bdefbe6a5c43baf85341a2891.squirrel@mx.sdf.org>
	<CAG9SHKMAXJRtzZY3gMwSOj_rt0=B0DEeNpyFh+3pBs3h7Ckpsg@mail.gmail.com>
Message-ID: <CAFcNxxXp9F-J-ye8eckobKgkkpDE6DyAPkAKr-yu+U9YGNfPMA@mail.gmail.com>

Hi Tim,

Having visited  your TRC-77 page many times, I knew you would be checking
in here.  Thanks!

The "tens" 3570, 7040, tend to be junked up with digital out here on the
East Coast.  That is why I was on 7039, and Howie pointed out that the K
beacon from Kamchatka was messing me up there, so I will probably move to
7038.  K was booming in here this morning at sunrise.

We moved the OMRN Sunday evening net from 3570 to 3558 to get away from
digital, so that is a commonly used frequency out here.

I might try 7050 to see what the digital situation is there.

73, RF

On Mon, Sep 30, 2024 at 2:45?PM Tim <timsamm at gmail.com> wrote:

> Hi guys - a happy TRC-77 operator out this way.  Of all my Mil radio gear
> the TRC-77 probably has the most operating hours on it.
> There are at least 4 TRC-77 sets/operators on the west coast in fairly
> regular operation along with similar "spy" sets on the "West Coast Agent
> Guard Channels" of 7050/3550 kc days/nights. Not a formal, schedulet "net"
> but a rally point to keep a receiver on Guard.  One can usually scare up at
> least one of us if we happen to be in the shack.  A quick EMail will also
> activate the crew...CW Lives!
> Also always good for random CQ contacts.  Most of us also have 3560, 7030,
> 7040, 7055 and 7060 available.
>
> These freqs were selected decades go since FT-243 rocks were commonly
> available and Expanded Spectrum Systems and QRPme also has HC-49's
> available for a few bucks each on those freqs (but receive rocks (+455 kc)
> are another matter.)
> I used the Epson programmable chips in my nearly-identical TRC-88, they
> work great but now there are SMT devices available.  However ProgRock seems
> like a better method these days - we look forward to Anthony's application
> notes on them.
>
> If interested, here is everything I have learned about the TRC-77's
> development, deployment and my own Ops with it.  A very capable Bush Radio,
> it goes with me on every boondocks recon trip...N6CC TRC-77 notes
> <https://www.n6cc.com/trc-77-hf-cw-transceiver/>  Probably more than you
> ever wanted to know!  HiHi
>
> You might consider some of those freqs as well.  I can hit the east coast
> with the TRC-77 and a dipole pretty routinely with the current good
> propagation conditions.  500+ miles is easy anytime.
> Have fun with your sets!
> Tim
> N6CC
>
> On Mon, Sep 30, 2024 at 7:52?AM WA6BBQ via MRCA <mrca at mailman.qth.net>
> wrote:
>
>> Rob, very cool!
>>
>> I also have a TRC-77, but its full of the factory default fairly worthless
>> crystals.
>>
>> I did a quick search on N3KCB and didn't see any link to any progrock
>> page.
>>
>> Do you have a link? I'd like to get mine moved to ham frequencies.
>>
>> Also, I'd be interested in your list of frequencies that you have
>> installed in yours, as well as anybody else who's got one up and running.
>>
>> Thanks and 73,
>> Jason WA6BBQ
>>
>> > Hi,
>> >
>> > I have been having fun with a TRC-77 set up with progRocks by Anthony
>> > N3KCB.
>> >
>> > This morning radio magic smiled on me as I turned to one of my 2 40m
>> > channels and heard old military radio buddy Howie WB2AWQ calling CQ from
>> > Nevada.
>> >
>> > It took a few tries to get his attention, but luckily Howie knows how to
>> > use RIT and he found me with his TS-530s, a rig I used to run also.
>> >
>> > Howie had to work a little bit but I repeated a few key items and we
>> had a
>> > 20 minute ragchew.  It was so cool.
>> >
>> > Will have to look into military packset CW frequencies for 80 and 40.
>> > Naturally one of my 80m channels is 3558 and for the time being I am on
>> > 3522 where I like to listen to the QRQ guys.
>> >
>> > RF
>> > ______________________________________________________________
>> > MRCA mailing list
>> > Home: http://mailman.qth.net/mailman/listinfo/mrca
>> > Help: http://mailman.qth.net/mmfaq.htm
>> > Post: mailto:MRCA at mailman.qth.net
>> >
>> > This list hosted by: http://www.qsl.net
>> > Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>> ______________________________________________________________
>> MRCA mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/mrca
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:MRCA 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 sbjohnston at aol.com  Tue Oct  1 17:40:55 2024
From: sbjohnston at aol.com (sbjohnston at aol.com)
Date: Tue, 1 Oct 2024 21:40:55 +0000 (UTC)
Subject: [Milsurplus] Progrock 2
In-Reply-To: <mailman.1128.1727778958.13568.milsurplus@mailman.qth.net>
References: <mailman.1128.1727778958.13568.milsurplus@mailman.qth.net>
Message-ID: <621925867.15023125.1727818855940@mail.yahoo.com>

I have really enjoyed all the QRP Labs kits I've built.? Just a couple weeks ago I put a 10m WSPR beacon on the air from here on Kauai using another Ultimate 3S kit and a low-pass-filter kit.? A successful result and quite economical.

I've used ProgRock2 devices several times as a crystal substitute, and I'd like to share my experiences:
-? The USB programming requires that you know how to use a terminal program to talk on a USB port.
- The output is a harmonic-rich square wave, so filtering may be necessary in some applications.? QRP Labs has very inexpensive low pass filter kits that may be helpful.
-? These are microcontroller/synthesizer modules and as such will spray significant radio noise.? When used in a transceiver or receiver you should be ready for some reception interference.? Shielding and filtering the lines into the ProgRock2 can help, but remember you are directly coupling the unit into your receiver.? If a birdie from the ProgRock2 happens to fall on a desired channel it might be a difficult problem.
-? If you are considering using a ProgRock2 in an FM transmitter application, you will need to make sure the rig uses phase modulation and not direct-FM.? Direct FM wants to frequency modulate the crystal oscillator, and if you use a ProgRock you can't do that.

I don't want to discourage people about the ProgRock2 - it is a very handy device and have successfully used them in projects.? But I have also been frustrated and given up on that approach.? It is important to realize the reality of the situation and manage one's expectations.

Steve WD8DAS?? 

sbjohnston at aol.com?? 
http://www.wd8das.net/?? http://af4k-crystals.com/?? 
--------------------------------------------------------------------?? 
Radio is your best entertainment value.?? 
--------------------------------------------------------------------?? 





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From mstangelo at comcast.net  Tue Oct  1 17:46:02 2024
From: mstangelo at comcast.net (mstangelo at comcast.net)
Date: Tue, 1 Oct 2024 17:46:02 -0400 (EDT)
Subject: [Milsurplus] [MRCA] QRP Military Radio Magic
In-Reply-To: <CAG9SHKPiQrur4Li+ExrqD0nUez5k6paA4AEdnKDOOuMScRTxwA@mail.gmail.com>
References: <CAFcNxxUBz_1E1rBi3uF=CLNUCNn98T-zEYYua6BhETwKxsAdHQ@mail.gmail.com>
	<ec13e05bdefbe6a5c43baf85341a2891.squirrel@mx.sdf.org>
	<CAG9SHKMAXJRtzZY3gMwSOj_rt0=B0DEeNpyFh+3pBs3h7Ckpsg@mail.gmail.com>
	<CAFcNxxXp9F-J-ye8eckobKgkkpDE6DyAPkAKr-yu+U9YGNfPMA@mail.gmail.com>
	<CAG9SHKPiQrur4Li+ExrqD0nUez5k6paA4AEdnKDOOuMScRTxwA@mail.gmail.com>
Message-ID: <1933626147.380011.1727819162810@connect.xfinity.com>

I also use these progrock2 as crystal replacements. If I can fit it in or provide access to the circuitry I like to use a DDS or Si5351A based oscillators as a VFO. Looking at Tim's excellent site I see this is difficult with manpack type radios such as TRC-77A.

Mike N2MS

> On 10/01/2024 4:07 PM EDT Tim <timsamm at gmail.com> wrote:
> 
> 
> Hi Rob - yep, basically the same observations out this way. The computer-computer auto generated QRM is here to stay unfortunately. I just view it as a training opportunity to evade Enemy Jamming..Improvise, Adapt, Overome...hihi They seemed to have quickly and permanently captured the long standing QRP CW 7040 freq but there it is... 3550 and 7050 are generally immune except during computer competitions and pretty much everyone has those crystals..
> 
> As an admitted Dinosaur I gravitate to pre-1970 era mil gear, mostly CW and mostly crystal controlled. Hence the FT-243 available freqs back when I got interested. Out here the "center of operational gravity" does seem to be WWII equipment but largely AM, some CW, little SSB except for the Wed evenings 2000 USB 3996 net with "modern' equipment. Plus a growing interest in "spy" radio gear, again largely crystal controlled..(you know who you are! hihi)
> 
> Looks like the programmble "crystals" will keep this old gear going amidst the new QRM environment and the drying up of crystal growers......A mix of new and old...out of necessity..But it's all good.....
> Tim
> N6CC
>

From arc5 at ix.netcom.com  Wed Oct  2 07:00:26 2024
From: arc5 at ix.netcom.com (David Stinson)
Date: Wed, 2 Oct 2024 06:00:26 -0500
Subject: [Milsurplus] [MRCA] QRP Military Radio Magic
In-Reply-To: <CAFcNxxXp9F-J-ye8eckobKgkkpDE6DyAPkAKr-yu+U9YGNfPMA@mail.gmail.com>
References: <CAFcNxxUBz_1E1rBi3uF=CLNUCNn98T-zEYYua6BhETwKxsAdHQ@mail.gmail.com>
	<ec13e05bdefbe6a5c43baf85341a2891.squirrel@mx.sdf.org>
	<CAG9SHKMAXJRtzZY3gMwSOj_rt0=B0DEeNpyFh+3pBs3h7Ckpsg@mail.gmail.com>
	<CAFcNxxXp9F-J-ye8eckobKgkkpDE6DyAPkAKr-yu+U9YGNfPMA@mail.gmail.com>
Message-ID: <b3656fb4-efc7-4cf3-abd5-d9381401d185@ix.netcom.com>

Many of you have doubtless thought of this,
but if one is looking for a way to "key" the TX
Prog Rocks so you don't have to leave them
running while you receive, tap-off the coil
voltage if you have a PTT relay and run it to
your progrocks.?? They'll run only when you key.
If you don't have a PTT relay, there is still some
means of turning-on your PA and, with a little
tinkering, that switched voltage can be made
to key the ProgRocks.
73 Dave S.
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From mark.k3msb at gmail.com  Wed Oct  2 13:56:10 2024
From: mark.k3msb at gmail.com (Mark K3MSB)
Date: Wed, 2 Oct 2024 13:56:10 -0400
Subject: [Milsurplus] BC-611 Operational Question
Message-ID: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>

Hi Folks

I'm interested in hearing about actual confirmed uses of the BC-611
communicating with USAAF aircraft during WW II.

I'm not interested in a general discussion of the pros and cons of the
611,  but rather actual instances of using them to talk to aircraft.

I've seen one drawing in a TM of a group of GI's on a hillside using the
611 to talk to a flight of B-24 Liberators,   but I've always viewed that
as wishful thinking.

Reason for asking.  I've been invited to participate with a group of
regional USAAF WWI re-enactors.   I'll be redoing my SCR-274N system over
the winter to make it transportable for field operations.   I have a pair
of 611s that work (well, one has a broken earpiece....) and I was thinking
that if the 611 was used in any capacity to talk with USAAF personnel it
would make an interesting demo to have people at the event (youth
particularly)  talk  to each other with the 274N and a 611.

Thanks

Mark K3MSB
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From boeing377 at gmail.com  Wed Oct  2 14:26:01 2024
From: boeing377 at gmail.com (boeing377 at gmail.com)
Date: Wed, 2 Oct 2024 11:26:01 -0700
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
Message-ID: <CAFZq+EyBfOH+5ZzGkvcW-CdphOupG70tpi8d67YNnL03Ox8tVg@mail.gmail.com>

https://share.icloud.com/photos/067IVOrnx4x_F9IpYZazcNpUg

I made a parachute mobile jump using my BC 611. A friend was on the
dropzone with his BC 611. Good luck trying to communicate with B 24s at
20,000 ft. I couldn?t hear my friend until I got below 2500 ft. I did hear
powerful ground based AM stations on 3885 when I deployed my canopy at
12,000 ft, but they couldn?t hear me.

I?m not a BC 611 expert but my observations are that it is range limited
due to low radiated power. Sure, there will be occasional anomalies where
somebody works 1000 miles with a BC 611 but it sure wasn?t happening to me.

By the way, I believe I am the last person to ever parachute from B 24. I
was at a skydiving meet in Illinois in 2000 and both the Collings
Foundation B-17 and B 24 were hauling skydivers. I was going to go on the
B-17, I could only afford one bomber jump ($350). One of the crew told me I
should pick the B 24 because this was the last flight it was ever going to
make with jumpers. I made sure I was the last one out of the bomb bay.

Mark
AF6IM
https://www.arrl.org/files/file/QST/This%20Month%20in%20QST/May2016/GLIFFORT.pdf





On Wed, Oct 2, 2024 at 10:56?AM Mark K3MSB <mark.k3msb at gmail.com> wrote:

> Hi Folks
>
> I'm interested in hearing about actual confirmed uses of the BC-611
> communicating with USAAF aircraft during WW II.
>
> I'm not interested in a general discussion of the pros and cons of the
> 611,  but rather actual instances of using them to talk to aircraft.
>
> I've seen one drawing in a TM of a group of GI's on a hillside using the
> 611 to talk to a flight of B-24 Liberators,   but I've always viewed that
> as wishful thinking.
>
> Reason for asking.  I've been invited to participate with a group of
> regional USAAF WWI re-enactors.   I'll be redoing my SCR-274N system over
> the winter to make it transportable for field operations.   I have a pair
> of 611s that work (well, one has a broken earpiece....) and I was thinking
> that if the 611 was used in any capacity to talk with USAAF personnel it
> would make an interesting demo to have people at the event (youth
> particularly)  talk  to each other with the 274N and a 611.
>
> Thanks
>
> Mark K3MSB
>
>
>
>
>
>
> ______________________________________________________________
> 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  Wed Oct  2 15:23:46 2024
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Wed, 2 Oct 2024 19:23:46 +0000
Subject: [Milsurplus] [MRCA] BC-611 Operational Question
In-Reply-To: <MW4PR84MB16842CEBD0500F0F7CF86931B9702@MW4PR84MB1684.NAMPRD84.PROD.OUTLOOK.COM>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
	<MW4PR84MB16842CEBD0500F0F7CF86931B9702@MW4PR84MB1684.NAMPRD84.PROD.OUTLOOK.COM>
Message-ID: <DM8P220MB0472EDEF0159DB99E4C483E9B8702@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

the BC-611 transceiver was the core component of the SCR-585 Signal Corps Radio set for CG-4A Gliders.

Ray F/KA3EKH


From: mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> On Behalf Of Jeep Platt
Sent: Wednesday, October 2, 2024 3:19 PM
To: Mark K3MSB <mark.k3msb at gmail.com>; Military Radio Collectors Association (mrca at mailman.qth.net) <mrca at mailman.qth.net>; List Milsurplus <milsurplus at mailman.qth.net>
Subject: Re: [MRCA] BC-611 Operational Question


Common knowledge that some gliders had a BC-611 and a special mount.  Don't know who they talked to... maybe the tow plane?  In a number of books, I note that the 611 did not have good range. Also read that the SCR-300 FM packset was a real Godsend to ground forces.
K3HVG

Sent from my Verizon, Samsung Galaxy smartphone
Get Outlook for Android<https://aka.ms/AAb9ysg>
________________________________
From: mrca-bounces at mailman.qth.net<mailto:mrca-bounces at mailman.qth.net> <mrca-bounces at mailman.qth.net<mailto:mrca-bounces at mailman.qth.net>> on behalf of Mark K3MSB <mark.k3msb at gmail.com<mailto:mark.k3msb at gmail.com>>
Sent: Wednesday, October 2, 2024 1:56:10 PM
To: Military Radio Collectors Association (mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>) <mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>>; List Milsurplus <milsurplus at mailman.qth.net<mailto:milsurplus at mailman.qth.net>>
Subject: [MRCA] BC-611 Operational Question

Hi Folks

I'm interested in hearing about actual confirmed uses of the BC-611 communicating with USAAF aircraft during WW II.

I'm not interested in a general discussion of the pros and cons of the 611,  but rather actual instances of using them to talk to aircraft.

I've seen one drawing in a TM of a group of GI's on a hillside using the 611 to talk to a flight of B-24 Liberators,   but I've always viewed that as wishful thinking.

Reason for asking.  I've been invited to participate with a group of regional USAAF WWI re-enactors.   I'll be redoing my SCR-274N system over the winter to make it transportable for field operations.   I have a pair of 611s that work (well, one has a broken earpiece....) and I was thinking that if the 611 was used in any capacity to talk with USAAF personnel it would make an interesting demo to have people at the event (youth particularly)  talk  to each other with the 274N and a 611.

Thanks

Mark K3MSB






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From w2hx at w2hx.com  Wed Oct  2 15:50:55 2024
From: w2hx at w2hx.com (W2HX)
Date: Wed, 2 Oct 2024 19:50:55 +0000
Subject: [Milsurplus] [MRCA] BC-611 Operational Question
In-Reply-To: <DM8P220MB0472EDEF0159DB99E4C483E9B8702@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
	<MW4PR84MB16842CEBD0500F0F7CF86931B9702@MW4PR84MB1684.NAMPRD84.PROD.OUTLOOK.COM>
	<DM8P220MB0472EDEF0159DB99E4C483E9B8702@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <PH0PR12MB8821E994A813BFE278DF0D80B5702@PH0PR12MB8821.namprd12.prod.outlook.com>

I thought the gliders had a BC-721 or something. I have one. I know it is probably nearly identical to the BC-611, but for accuracy...


73 Eugene W2HX
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 Ray Fantini via Milsurplus
Sent: Wednesday, October 2, 2024 3:24 PM
To: Jeep Platt <jeepcomms at outlook.com>; Mark K3MSB <mark.k3msb at gmail.com>; Military Radio Collectors Association (mrca at mailman.qth.net) <mrca at mailman.qth.net>; List Milsurplus <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] [MRCA] BC-611 Operational Question

the BC-611 transceiver was the core component of the SCR-585 Signal Corps Radio set for CG-4A Gliders.

Ray F/KA3EKH


From: mrca-bounces at mailman.qth.net<mailto:mrca-bounces at mailman.qth.net> <mrca-bounces at mailman.qth.net<mailto:mrca-bounces at mailman.qth.net>> On Behalf Of Jeep Platt
Sent: Wednesday, October 2, 2024 3:19 PM
To: Mark K3MSB <mark.k3msb at gmail.com<mailto:mark.k3msb at gmail.com>>; Military Radio Collectors Association (mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>) <mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>>; List Milsurplus <milsurplus at mailman.qth.net<mailto:milsurplus at mailman.qth.net>>
Subject: Re: [MRCA] BC-611 Operational Question


Common knowledge that some gliders had a BC-611 and a special mount.  Don't know who they talked to... maybe the tow plane?  In a number of books, I note that the 611 did not have good range. Also read that the SCR-300 FM packset was a real Godsend to ground forces.
K3HVG

Sent from my Verizon, Samsung Galaxy smartphone
Get Outlook for Android<https://aka.ms/AAb9ysg>
________________________________
From: mrca-bounces at mailman.qth.net<mailto:mrca-bounces at mailman.qth.net> <mrca-bounces at mailman.qth.net<mailto:mrca-bounces at mailman.qth.net>> on behalf of Mark K3MSB <mark.k3msb at gmail.com<mailto:mark.k3msb at gmail.com>>
Sent: Wednesday, October 2, 2024 1:56:10 PM
To: Military Radio Collectors Association (mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>) <mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>>; List Milsurplus <milsurplus at mailman.qth.net<mailto:milsurplus at mailman.qth.net>>
Subject: [MRCA] BC-611 Operational Question

Hi Folks

I'm interested in hearing about actual confirmed uses of the BC-611 communicating with USAAF aircraft during WW II.

I'm not interested in a general discussion of the pros and cons of the 611,  but rather actual instances of using them to talk to aircraft.

I've seen one drawing in a TM of a group of GI's on a hillside using the 611 to talk to a flight of B-24 Liberators,   but I've always viewed that as wishful thinking.

Reason for asking.  I've been invited to participate with a group of regional USAAF WWI re-enactors.   I'll be redoing my SCR-274N system over the winter to make it transportable for field operations.   I have a pair of 611s that work (well, one has a broken earpiece....) and I was thinking that if the 611 was used in any capacity to talk with USAAF personnel it would make an interesting demo to have people at the event (youth particularly)  talk  to each other with the 274N and a 611.

Thanks

Mark K3MSB






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From RAFANTINI at salisbury.edu  Wed Oct  2 16:00:36 2024
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Wed, 2 Oct 2024 20:00:36 +0000
Subject: [Milsurplus] [MRCA] BC-611 Operational Question
In-Reply-To: <PH0PR12MB8821E994A813BFE278DF0D80B5702@PH0PR12MB8821.namprd12.prod.outlook.com>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
	<MW4PR84MB16842CEBD0500F0F7CF86931B9702@MW4PR84MB1684.NAMPRD84.PROD.OUTLOOK.COM>
	<DM8P220MB0472EDEF0159DB99E4C483E9B8702@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
	<PH0PR12MB8821E994A813BFE278DF0D80B5702@PH0PR12MB8821.namprd12.prod.outlook.com>
Message-ID: <DM8P220MB0472FBB15A49C0658B24C156B8702@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Not an expert or anything like that, think Breck Smith (K4CHE) did a lot of research back in the day on the subject. Never been a big fan of the 611, always thought it was overcomplicated in design, and never used near as much as Hollywood implies. Can see it netting with things like the SCR-284 but not much else. But that's just me and as OP indicated he did not want this devolving into discussion of the 611.

Ray F/KA3EKH


From: W2HX <w2hx at w2hx.com>
Sent: Wednesday, October 2, 2024 3:51 PM
To: Ray Fantini <RAFANTINI at salisbury.edu>; Jeep Platt <jeepcomms at outlook.com>; Mark K3MSB <mark.k3msb at gmail.com>; Military Radio Collectors Association (mrca at mailman.qth.net) <mrca at mailman.qth.net>; List Milsurplus <milsurplus at mailman.qth.net>
Subject: RE: [MRCA] BC-611 Operational Question


I thought the gliders had a BC-721 or something. I have one. I know it is probably nearly identical to the BC-611, but for accuracy...


73 Eugene W2HX
My Youtube Channel: https://www.youtube.com/@w2hx/videos


From: milsurplus-bounces at mailman.qth.net<mailto:milsurplus-bounces at mailman.qth.net> <milsurplus-bounces at mailman.qth.net<mailto:milsurplus-bounces at mailman.qth.net>> On Behalf Of Ray Fantini via Milsurplus
Sent: Wednesday, October 2, 2024 3:24 PM
To: Jeep Platt <jeepcomms at outlook.com<mailto:jeepcomms at outlook.com>>; Mark K3MSB <mark.k3msb at gmail.com<mailto:mark.k3msb at gmail.com>>; Military Radio Collectors Association (mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>) <mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>>; List Milsurplus <milsurplus at mailman.qth.net<mailto:milsurplus at mailman.qth.net>>
Subject: Re: [Milsurplus] [MRCA] BC-611 Operational Question

the BC-611 transceiver was the core component of the SCR-585 Signal Corps Radio set for CG-4A Gliders.

Ray F/KA3EKH


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From kargo_cult at msn.com  Wed Oct  2 16:52:07 2024
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 2 Oct 2024 20:52:07 +0000
Subject: [Milsurplus] BC-611 Operational Question
Message-ID: <PH0PR20MB4374FE14C713675A5DAA062EE4702@PH0PR20MB4374.namprd20.prod.outlook.com>

It takes me a while for my brain to boot up, but i feel some memories coming back now. Look up "Rescue from Shangri La" on Youtube. 12 minute vintage film, and one shot of BC-611 in the use you're asking about. Years ago i read the WW2 Nat'l Geo with the original article, then went and bought the Mitchell Zuckoff book "Lost in Shangri La". The U.S. went to great effort to rescue the 3 survivors of the full 24 persons on the "tourist flight". Possibly there were similar uses to communicate with drop planes but such seem rarely documented.
Oh, BTW, remember the photo of Churchill listening with a 611 while a demonstration paratroop drop was being done ?
-Hue Miller



Sent from my Galaxy


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From noflood1 at sonic.net  Wed Oct  2 17:10:11 2024
From: noflood1 at sonic.net (Tom)
Date: Wed, 02 Oct 2024 14:10:11 -0700
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <CAFZq+EyBfOH+5ZzGkvcW-CdphOupG70tpi8d67YNnL03Ox8tVg@mail.gmail.com>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
	<CAFZq+EyBfOH+5ZzGkvcW-CdphOupG70tpi8d67YNnL03Ox8tVg@mail.gmail.com>
Message-ID: <40622f79ca7b287ed67dabd67e688882@sonic.net>

   Back in 2015 at the West Coast Military Radio Collectors Meet at Camp
San Luis in San Luis Obsipo we did a radio exercise. I was with a number
of guys that went up on a tall hill (signal hill)  that overlooked Camp
San Luis, I could see the building we had our meet in, distance was
around a mile.  We were operating on 3.885 MHz and AM, one of the guys
had a BC-611 with a crystal for 3.885, he tried working us from the
parking lot of that building. He was successful but was just above the
noise floor even at that short a distance. 

   I would also wonder about the nulls in the antenna pattern after you
consider 200 mw and very short 80 meter vertical antenna with no counter
poise 

   Picture is Camp San Luis from Signal Hill on the day of that event. 

                                           W6TOM

On 2024-10-02 11:26, boeing377 at gmail.com wrote:

> https://share.icloud.com/photos/067IVOrnx4x_F9IpYZazcNpUg 
> I made a parachute mobile jump using my BC 611. A friend was on the dropzone with his BC 611. Good luck trying to communicate with B 24s at 20,000 ft. I couldn't hear my friend until I got below 2500 ft. I did hear powerful ground based AM stations on 3885 when I deployed my canopy at 12,000 ft, but they couldn't hear me.  
> 
> I'm not a BC 611 expert but my observations are that it is range limited due to low radiated power. Sure, there will be occasional anomalies where somebody works 1000 miles with a BC 611 but it sure wasn't happening to me.  
> 
> By the way, I believe I am the last person to ever parachute from B 24. I was at a skydiving meet in Illinois in 2000 and both the Collings Foundation B-17 and B 24 were hauling skydivers. I was going to go on the B-17, I could only afford one bomber jump ($350). One of the crew told me I should pick the B 24 because this was the last flight it was ever going to make with jumpers. I made sure I was the last one out of the bomb bay.  
> 
> Mark 
> AF6IM 
> 
> https://www.arrl.org/files/file/QST/This%20Month%20in%20QST/May2016/GLIFFORT.pdf 
> 
> On Wed, Oct 2, 2024 at 10:56?AM Mark K3MSB <mark.k3msb at gmail.com> wrote: 
> 
>> Hi Folks 
>> 
>> I'm interested in hearing about actual confirmed uses of the BC-611 communicating with USAAF aircraft during WW II. 
>> 
>> I'm not interested in a general discussion of the pros and cons of the 611,  but rather actual instances of using them to talk to aircraft. 
>> 
>> I've seen one drawing in a TM of a group of GI's on a hillside using the 611 to talk to a flight of B-24 Liberators,   but I've always viewed that as wishful thinking. 
>> 
>> Reason for asking.  I've been invited to participate with a group of regional USAAF WWI re-enactors.   I'll be redoing my SCR-274N system over the winter to make it transportable for field operations.   I have a pair of 611s that work (well, one has a broken earpiece....) and I was thinking that if the 611 was used in any capacity to talk with USAAF personnel it would make an interesting demo to have people at the event (youth particularly)  talk  to each other with the 274N and a 611. 
>> 
>> Thanks 
>> 
>> Mark K3MSB 
>> 
>> ______________________________________________________________
>> 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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From kargo_cult at msn.com  Wed Oct  2 17:47:04 2024
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 2 Oct 2024 21:47:04 +0000
Subject: [Milsurplus] BC-611 Operational Question
Message-ID: <PH0PR20MB4374E7CA5C0EDDFA68373BABE4702@PH0PR20MB4374.namprd20.prod.outlook.com>

I wouldn't call the 611 a huge operational success. The joke was, you could yell farther, which was a least sometimes true. My feeling is that without a throat mic, the thing would have been not very practical. I think the F production approached this with a socket for headphone and mic, altho you never saw this in real life, outside the manual. Both our enemies at the time had talkies with headphones and throat mics. You didn't have with one arm hold the thing to your ear to not miss a message, if you're wondering what exactly i mean. The enemy sets were also frequency variable and the antenna was plug-in. In the late 1970s i saw a 611 that had been abandoned, tossed away in combat in the Netherlands. Why ? The antenna was broken. The problems with the BC-745 and BC-611 were of course solved with the BC-1000, which was a real winner.
-Hue Miller



Sent from my Galaxy


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From sbjohnston at aol.com  Wed Oct  2 18:37:57 2024
From: sbjohnston at aol.com (sbjohnston at aol.com)
Date: Wed, 2 Oct 2024 22:37:57 +0000 (UTC)
Subject: [Milsurplus] [MRCA] BC-611 Operational Question
In-Reply-To: <mailman.1293.1727897042.13568.milsurplus@mailman.qth.net>
References: <mailman.1293.1727897042.13568.milsurplus@mailman.qth.net>
Message-ID: <1724366388.15517139.1727908677865@mail.yahoo.com>

I have a BC-721 which is the glider version of the BC-611. ? It has an 8 pin Jones socket on the side of bottom swing door.? I think the bottom cover is deeper than on the BC-611.? In original use, the socket provides the interconnections to the glider via the mount.??
I've never seen a BC-721 mount, but I've put that socket to good use to feed A and B power in from an external pack of batteries.? 


Steve WD8DAS?? 

sbjohnston at aol.com?? 
http://www.wd8das.net/?? http://af4k-crystals.com/?? 
--------------------------------------------------------------------?? 
Radio is your best entertainment value.?? 
--------------------------------------------------------------------?? 

Mein Ohr ganz nah am Weltempf?nger...
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From sbjohnston at aol.com  Wed Oct  2 18:46:04 2024
From: sbjohnston at aol.com (sbjohnston at aol.com)
Date: Wed, 2 Oct 2024 22:46:04 +0000 (UTC)
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <mailman.1308.1727903419.13568.milsurplus@mailman.qth.net>
References: <mailman.1308.1727903419.13568.milsurplus@mailman.qth.net>
Message-ID: <827216352.15544698.1727909164312@mail.yahoo.com>

Several times I've helped others with their BC-611s.? Range was always limited, but in some cases of extra-poor range, I recall checking the alignment and finding it way off.? I think the radio had previously been on some other frequency and the only thing that had been done was to put crystals in it for ops on 3885 kHz.? Once tuned up they ran much better.? 

Oh, and in one instance, the crystals had been changed but not the associated coil which was for a different range if memory serves? (and alignment was off)


Steve WD8DAS?? 

sbjohnston at aol.com?? 
http://www.wd8das.net/?? http://af4k-crystals.com/?? 
--------------------------------------------------------------------?? 
Radio is your best entertainment value.?? 
--------------------------------------------------------------------?? 

Mein Ohr ganz nah am Weltempf?nger...



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From mark.k3msb at gmail.com  Wed Oct  2 19:50:07 2024
From: mark.k3msb at gmail.com (Mark K3MSB)
Date: Wed, 2 Oct 2024 19:50:07 -0400
Subject: [Milsurplus] [MRCA] BC-611 Operational Question
In-Reply-To: <81D6EEF5-4265-4808-A7BD-F4F31176A011@aol.com>
References: <81D6EEF5-4265-4808-A7BD-F4F31176A011.ref@aol.com>
	<81D6EEF5-4265-4808-A7BD-F4F31176A011@aol.com>
Message-ID: <CABdVoaB+_o_ncomez=i7epjkFbucQHPUxb1wDfhCAGZZvmuiOg@mail.gmail.com>

I was not even remotely implying that my SCR-274N used in the feld was
authentic.   Clearly it is not.    I would be taking it into the field (in
a tent) to show (demo) a working WW II USAAF Radio Set.   It will be
explained that it was an airborne system used on Allied aircraft.   They
will have a small 117 generator available for powering the power supply I
bring along (which is my 28V power supply with two tractor batteries
floated across the output).    I of course will not be demoing it all the
time;  in the off times I suggested that just the two batteries could power
the Navigation receiver (0.19 to 0.55) tuned to a beacon.   Still in the
early planning stages.....

Mark K3MSB











On Wed, Oct 2, 2024 at 7:14?PM MARK DORNEY via MRCA <mrca at mailman.qth.net>
wrote:

>     About the only time an SRC-274-N would have been mobile would have
> been if the set was mounted in an aircraft. The SCR-274-N wasn?t really
> designed for use on the ground in the field. The set isn?t rugged enough to
> really withstand the rigors of field use and is not sealed against
> weather.  Power supply would also have been a problem since 24 volt vehicle
> electrical systems ( required to power up an SCR-274-N ) didn?t really come
> into use with US Army Ground Forces until the Korean War. During WW2, radio
> equipped vehicles had mostly 12 volt power systems ( 6 volt could be used ,
> but there were problems keeping a 6 volt equipped radio vehicle?s battery
> charged in the field ).  There were very limited 12 volt versions of the
> SRC-274 type radios, but they were very few and far between, and by the
> beginning of 1943, the USAAF had converted almost all of their aircraft (
> and all of their new aircraft ) to operate using 24 volt electrical
> systems, 12 volt aircraft liaison sets simply were no longer supplied to
> the USAAF overseas (the USN converted their aircraft sooner ). Another
> problem you might encounter using these few 12 volt powered aircraft radio
> systems is the limited frequency range the early radios used. You may not
> find a transmitter with a frequency range legal for you to use. Of the USN
> radios, the Western Electric GF-11/RU-16 is a 12 volt radio that comes to
> mind, but that set, while designed as an aircraft radio, wasn?t really
> fielded as an aircraft radio ( only documented use was on USMC ships - I
> didn?t know the Marines had ships, and by one USMC Artillery Battalion on a
> motor gun carriage). now I suppose a scavenged aircraft APU could be used
> to power your SCR-274-N, but as far as any standard vehicle was concerned,
> the options would have been very limited. Scavenged liaison radios like
> your SCR-274-N could be found in airfield watch stations, but were powered
> either using a rectifier ( if that could be found) or much more commonly a
> battery bank of scavenged automobile batteries.
>
> 73
> Mark D.
> WW2RDO
>
> ?In matters of style, float with the current. In matters of Principle,
> stand like a rock. ?.   -   Thomas Jefferson
>
> Sent from my iPhone
>
> On Oct 2, 2024, at 6:00 PM, MARK DORNEY via MRCA <mrca at mailman.qth.net>
> wrote:
>
> efficient on the 60 meters ( the short antenna on the BC-611 is better
> suited to that frequency band ). Unfortunately, the bandwidth the
> ______________________________________________________________
> MRCA mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mrca
> Help: http://mailman.qth.net/mmfaq.htm
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From smithab11 at comcast.net  Wed Oct  2 19:57:32 2024
From: smithab11 at comcast.net (B. Smith)
Date: Wed, 2 Oct 2024 19:57:32 -0400
Subject: [Milsurplus] BC-611 Operational Range
Message-ID: <02bf7cbe-e4d1-4a71-8800-90751ffa4036@comcast.net>

 ????????? We have talked across the Delaware Bay with the BC-611, as 
well as? the Pogo Stick and the DAV. Operators on the New Jersey side 
were Dave KB3ELD? and Mark KD3ZK - a fine bunch.
The secret to maximize ops for any of the low power sets is to tune the 
transmitter final for maximum Field Strength with the antenna fully 
extended while you are holding on to the set. ( you are the counterpoise 
!) I usually would do a little touch up on tuning at the OL.
k4che
http://k4che.com/Ft.%20DuPont%20March%202012/Ft%20Dupont%20March%202012%20pg%201.htm


From RAFANTINI at salisbury.edu  Wed Oct  2 21:04:38 2024
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Thu, 3 Oct 2024 01:04:38 +0000
Subject: [Milsurplus] [MRCA]   BC-611 Operational Question
In-Reply-To: <1724366388.15517139.1727908677865@mail.yahoo.com>
References: <mailman.1293.1727897042.13568.milsurplus@mailman.qth.net>
	<1724366388.15517139.1727908677865@mail.yahoo.com>
Message-ID: <DM8P220MB047216D0373FF91F454A9686B8712@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

You can see the base that the BC-611/BC-721 plugs into in the CG-4A Glider between the dual yokes.  It?s at the Air Mobility Museum in Dover Delaware.

https://amcmuseum.org/at-the-museum/aircraft/cg-4a/

Ray F/KA3EKH

________________________________
From: mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> on behalf of sbjohnston--- via MRCA <mrca at mailman.qth.net>
Sent: Wednesday, October 2, 2024 6:37 PM
To: milsurplus at mailman.qth.net <milsurplus at mailman.qth.net>; MARK DORNEY via MRCA <mrca at mailman.qth.net>
Subject: Re: [MRCA] [Milsurplus] BC-611 Operational Question


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


I have a BC-721 which is the glider version of the BC-611.   It has an 8 pin Jones socket on the side of bottom swing door.  I think the bottom cover is deeper than on the BC-611.  In original use, the socket provides the interconnections to the glider via the mount.

I've never seen a BC-721 mount, but I've put that socket to good use to feed A and B power in from an external pack of batteries.


Steve WD8DAS

sbjohnston at aol.com
http://www.wd8das.net/   <http://www.wd8das.net/>
http://af4k-crystals.com<http://af4k-crystals.com/>/
--------------------------------------------------------------------

Radio is your best entertainment value.
--------------------------------------------------------------------


Mein Ohr ganz nah am Weltempf?nger...

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From facility_406 at bruteforcedevelopment.com  Wed Oct  2 23:28:00 2024
From: facility_406 at bruteforcedevelopment.com (Facility 406)
Date: Wed, 2 Oct 2024 20:28:00 -0700
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <CAFZq+EyBfOH+5ZzGkvcW-CdphOupG70tpi8d67YNnL03Ox8tVg@mail.gmail.com>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
	<CAFZq+EyBfOH+5ZzGkvcW-CdphOupG70tpi8d67YNnL03Ox8tVg@mail.gmail.com>
Message-ID: <b0c904e3-da71-8541-e628-edaf199004c0@bruteforcedevelopment.com>


> I?m not a BC 611 expert but my observations are that it is range limited 
> due to low radiated power. Sure, there will be occasional anomalies 
> where somebody works 1000 miles with a BC 611 but it sure wasn?t 
> happening to me.

20,000 feet at ground level is almost nothing, and even less in what is 
essentially "free space", your observation suggests antenna radiation 
patterns, rather than low radiated power.

Kurt


From boeing377 at gmail.com  Wed Oct  2 23:36:27 2024
From: boeing377 at gmail.com (boeing377 at gmail.com)
Date: Wed, 2 Oct 2024 20:36:27 -0700
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <b0c904e3-da71-8541-e628-edaf199004c0@bruteforcedevelopment.com>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
	<CAFZq+EyBfOH+5ZzGkvcW-CdphOupG70tpi8d67YNnL03Ox8tVg@mail.gmail.com>
	<b0c904e3-da71-8541-e628-edaf199004c0@bruteforcedevelopment.com>
Message-ID: <CAFZq+Ez4mb0vXw0hmxiX8SQV36tztto9jJ3NeUr_x3FY41HMFw@mail.gmail.com>

I?m an EE and agree with your theoretical analysis but I tried many
different antenna orientations during descent hoping to contact my friend
on the DZ. No joy until I was about half a mile from him vertically.

Mark
AF6IM

On Wed, Oct 2, 2024 at 8:28?PM Facility 406 <
facility_406 at bruteforcedevelopment.com> wrote:

>
> > I?m not a BC 611 expert but my observations are that it is range limited
> > due to low radiated power. Sure, there will be occasional anomalies
> > where somebody works 1000 miles with a BC 611 but it sure wasn?t
> > happening to me.
>
> 20,000 feet at ground level is almost nothing, and even less in what is
> essentially "free space", your observation suggests antenna radiation
> patterns, rather than low radiated power.
>
> Kurt
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
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>
> 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 ark at ar88.net  Wed Oct  2 23:54:01 2024
From: ark at ar88.net (Al Klase)
Date: Wed, 2 Oct 2024 23:54:01 -0400
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <PH0PR20MB4374FE14C713675A5DAA062EE4702@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB4374FE14C713675A5DAA062EE4702@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <aea4c1f0-dc24-44ff-bdca-d4b21800b579@ar88.net>

Hue,

The radio was so easy to operate that even the Prime Minister could 
handle it.



BTW,? the BC-721 used in the gliders is pretty much the same radio with 
jacks fro a headset.

AL

On 10/2/2024 4:52 PM, Hubert Miller wrote:
> It takes me a while for my brain to boot up, but i feel some memories 
> coming back now. Look up "Rescue from Shangri La" on Youtube. 12 
> minute vintage film, and one shot of BC-611 in the use you're asking 
> about. Years ago i read the WW2 Nat'l Geo with the original article, 
> then went and bought the Mitchell Zuckoff book "Lost in Shangri La". 
> The U.S. went to great effort to rescue the 3 survivors of the full 24 
> persons on the "tourist flight". Possibly there were similar uses to 
> communicate with drop planes but such seem rarely documented.
> Oh, BTW, remember the photo of Churchill listening with a 611 while a 
> demonstration paratroop drop was being done ?
> -Hue Miller
>
>
>
> Sent from my Galaxy
>
>
>
> ______________________________________________________________
> 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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-- 
ARK Sig Block Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/
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From facility_406 at bruteforcedevelopment.com  Thu Oct  3 00:11:28 2024
From: facility_406 at bruteforcedevelopment.com (Facility 406)
Date: Wed, 2 Oct 2024 21:11:28 -0700
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <CAFZq+Ez4mb0vXw0hmxiX8SQV36tztto9jJ3NeUr_x3FY41HMFw@mail.gmail.com>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
	<CAFZq+EyBfOH+5ZzGkvcW-CdphOupG70tpi8d67YNnL03Ox8tVg@mail.gmail.com>
	<b0c904e3-da71-8541-e628-edaf199004c0@bruteforcedevelopment.com>
	<CAFZq+Ez4mb0vXw0hmxiX8SQV36tztto9jJ3NeUr_x3FY41HMFw@mail.gmail.com>
Message-ID: <520ecb6d-bf99-cd16-07d5-943d703be332@bruteforcedevelopment.com>

On 10/2/2024 20:36, boeing377 at gmail.com wrote:
> I?m an EE and agree with your theoretical analysis but I tried many 
> different antenna orientations during descent hoping to contact my 
> friend on the DZ. No joy until I was about half a mile from him vertically.

So, the ground station wasn't radiating up...  Makes sense, for 
hand-held radio, with a vertical antenna.  Vertical over vertical rarely 
works, even close on a mast, and one vertical, one horizontal, if 
perfect, decouples by 30dB, or 1/1000th of the signal between them.

If you both turned your radios so the antennas were parallel to each 
other, both horizontal to the ground, for maximum coupling between them, 
communications would have been easy, and that thousand miles you hear 
about, could have been well into space.

Now, if you were jumping up and down on the ground, 20,000 feet to his 
left, that would have been silly, especially with a deployed 'chute, but 
you could have talked better over the radio.

Kurt


From Kargo_cult at msn.com  Thu Oct  3 03:42:18 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Thu, 3 Oct 2024 07:42:18 +0000
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <520ecb6d-bf99-cd16-07d5-943d703be332@bruteforcedevelopment.com>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
	<CAFZq+EyBfOH+5ZzGkvcW-CdphOupG70tpi8d67YNnL03Ox8tVg@mail.gmail.com>
	<b0c904e3-da71-8541-e628-edaf199004c0@bruteforcedevelopment.com>
	<CAFZq+Ez4mb0vXw0hmxiX8SQV36tztto9jJ3NeUr_x3FY41HMFw@mail.gmail.com>
	<520ecb6d-bf99-cd16-07d5-943d703be332@bruteforcedevelopment.com>
Message-ID: <PH0PR20MB437417A4472C19C7DECA6750E4712@PH0PR20MB4374.namprd20.prod.outlook.com>

So altho the 611 antenna is ~1/80th wavelength, it is not like really a 'point source', and that the polarization of the handheld is important ?
I do see that there will be a null directly above ( and below ) the vertical antenna.

I read some years back, that someone had been trying out a 611 radio, this is postwar, and they happened to try touching the 611 antenna to the base of a metal flagpole.
This notably increased the signal strength, which translates to distance, i suppose. I still do not understand how that would work. In the radio you have a loading coil working 
with apretty specific low capacitance antenna. I suppose this assumes the metal flagpole was not perfectly grounded and that its capacitance was still in the 2 or low 3 digits
capacity, so that the percentage of wavelength of this new antenna addition overcame any mistuning of the output circuit. 

I friend has a 611 and told me he can hear a Chinese SW broadcaster on it, so it's not the receiver that limits the working distance.
-Hue Miller 

From farmer.rob.flory at gmail.com  Thu Oct  3 08:53:21 2024
From: farmer.rob.flory at gmail.com (Rob Flory)
Date: Thu, 3 Oct 2024 08:53:21 -0400
Subject: [Milsurplus] [MRCA] BC-611 Operational Question
In-Reply-To: <FDDAD020-4AA3-4544-884B-E886092BAF09@aol.com>
References: <73D0BD48-01AF-4A1C-A738-F0A89CA6574A@sbcglobal.net>
	<FDDAD020-4AA3-4544-884B-E886092BAF09@aol.com>
Message-ID: <CAFcNxxVYPRek=ajxKP4ZMw1k5uEHbJvq3=0qiN2pB8KYsqxfHw@mail.gmail.com>

Here is a map of the training exercise we did in anticipation of the
LST-325 transit of Buzzards Bay.

K2WI, that's me, was running a TBX set with 24-foot vertical.

W1NZR switched to BC-611 after initial contact with a larger rig, and we
were able to communicate.  I copied him about 3 by 3.    W1NZR with BC-611
to K2WI with TBX 13 miles of salt water from a beachfront location.

I believe during the transit, before he switched to the BC-611 on the deck,
Perry on WW2LST was running the TCS and his signal would be best described
as "blistering" from the mouth of the bay.

The other picture is my typical setup which also included the gasoline
generator during the Buzzards Bay exercises.

73, RF

On Thu, Oct 3, 2024 at 8:00?AM MARK DORNEY via MRCA <mrca at mailman.qth.net>
wrote:

>          What frequency was the BC-611 set on?  Also, on a good
> propagation day, good things happen communication wise. 1-3 miles ( the
> distance between your shore station and the LST), when traveling in a slow
> transport/supply plane like a C-47, flying between 150-200 mph, gives about
> 4-5 minutes of comms capability to and from the aircraft. An LST moves at
> maybe 25 mph ( I?m not going to convert knots into mph) max . Much smaller
> communications window for the aircraft than the ship ( the aircraft is
> moving much faster than the ship), and your shore station was using a less
> powerful radio than the ship or the aircraft,  and using a far less
> efficient antenna. And the question wouldn?t be so much ?can the ship reach
> your station on shore? - the ships radio has a pretty powerful
> transmitter,, a long antenna and the hull of the ship is one big
> counterpoise. The question would be more ? can your shore station radio
> reach the ship?.
>
> 73
> Mark D.
> WW2RDO
>
> ?In matters of style, float with the current. In matters of Principle,
> stand like a rock. ?.   -   Thomas Jefferson
>
> Sent from my iPhone
>
> On Oct 3, 2024, at 12:41 AM, Christopher Bowne <aj1g at sbcglobal.net> wrote:
>
> ?When LST-325 was coming up Buzzards Bay enroute to a port call at
> Massachusetts Maritime Academy during an East Coast cruise in 2005, a
> number of us had a field exercise where we set up portable stations on
> shore along the bay and contacted the  ship on 75 meter AM. Perry, W8AU
> contacted us not only with the main original main HF transmitter, a TCK if
> I recall correctly, from the radio room, but also, when the ship was within
> line of sight between 1 and 3 miles away, from the bridge with a BC-611
> walkie talkie and also visually via Morse lamp. There were several of us
> operating from the beach. Rob Flory and I were on a beach just south of the
> MMA, I was running a GRC-9 powered with
> a DY-88 dynamotor and a 12v car battery. .Rob was on a Marine TBX.  My
> GRC-9 used about a 12 foot field whip antenna and a number of on sand
> counter poise wires.  I believe Rob used a similar antenna.  I remember
> that the signal from Perry?s 611
> was loud and clear, when ship was well over a mille out across the bay.
>
> I would think it likely that comms between aircraft command sets  and
> ground troops below with BC-611s were common such as when coordinating
> parachute supply drops if there were no other more powerful sets on the
> ground to  communicate with were available.
>
> I believe that there was a BC-611 variant that was installed  in gliders
> for communication with their tow planes.
>
> 73 de Chris AJ1G
> Stonington CT
>
>
>
>
> Sent from my iPhone
>
> On Oct 2, 2024, at 19:50, Mark K3MSB <mark.k3msb at gmail.com> wrote:
>
> ?
> I was not even remotely implying that my SCR-274N used in the feld was
> authentic.   Clearly it is not.    I would be taking it into the field (in
> a tent) to show (demo) a working WW II USAAF Radio Set.   It will be
> explained that it was an airborne system used on Allied aircraft.   They
> will have a small 117 generator available for powering the power supply I
> bring along (which is my 28V power supply with two tractor batteries
> floated across the output).    I of course will not be demoing it all the
> time;  in the off times I suggested that just the two batteries could power
> the Navigation receiver (0.19 to 0.55) tuned to a beacon.   Still in the
> early planning stages.....
>
> Mark K3MSB
>
>
>
>
>
>
>
>
>
>
>
> On Wed, Oct 2, 2024 at 7:14?PM MARK DORNEY via MRCA <mrca at mailman.qth.net>
> wrote:
>
>>     About the only time an SRC-274-N would have been mobile would have
>> been if the set was mounted in an aircraft. The SCR-274-N wasn?t really
>> designed for use on the ground in the field. The set isn?t rugged enough to
>> really withstand the rigors of field use and is not sealed against
>> weather.  Power supply would also have been a problem since 24 volt vehicle
>> electrical systems ( required to power up an SCR-274-N ) didn?t really come
>> into use with US Army Ground Forces until the Korean War. During WW2, radio
>> equipped vehicles had mostly 12 volt power systems ( 6 volt could be used ,
>> but there were problems keeping a 6 volt equipped radio vehicle?s battery
>> charged in the field ).  There were very limited 12 volt versions of the
>> SRC-274 type radios, but they were very few and far between, and by the
>> beginning of 1943, the USAAF had converted almost all of their aircraft (
>> and all of their new aircraft ) to operate using 24 volt electrical
>> systems, 12 volt aircraft liaison sets simply were no longer supplied to
>> the USAAF overseas (the USN converted their aircraft sooner ). Another
>> problem you might encounter using these few 12 volt powered aircraft radio
>> systems is the limited frequency range the early radios used. You may not
>> find a transmitter with a frequency range legal for you to use. Of the USN
>> radios, the Western Electric GF-11/RU-16 is a 12 volt radio that comes to
>> mind, but that set, while designed as an aircraft radio, wasn?t really
>> fielded as an aircraft radio ( only documented use was on USMC ships - I
>> didn?t know the Marines had ships, and by one USMC Artillery Battalion on a
>> motor gun carriage). now I suppose a scavenged aircraft APU could be used
>> to power your SCR-274-N, but as far as any standard vehicle was concerned,
>> the options would have been very limited. Scavenged liaison radios like
>> your SCR-274-N could be found in airfield watch stations, but were powered
>> either using a rectifier ( if that could be found) or much more commonly a
>> battery bank of scavenged automobile batteries.
>>
>> 73
>> Mark D.
>> WW2RDO
>>
>> ?In matters of style, float with the current. In matters of Principle,
>> stand like a rock. ?.   -   Thomas Jefferson
>>
>> Sent from my iPhone
>>
>> On Oct 2, 2024, at 6:00 PM, MARK DORNEY via MRCA <mrca at mailman.qth.net>
>> wrote:
>>
>> efficient on the 60 meters ( the short antenna on the BC-611 is better
>> suited to that frequency band ). Unfortunately, the bandwidth the
>> ______________________________________________________________
>> MRCA mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/mrca
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:MRCA at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> MRCA mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mrca
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MRCA at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> MRCA mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mrca
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MRCA 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 RAFANTINI at salisbury.edu  Thu Oct  3 09:17:39 2024
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Thu, 3 Oct 2024 13:17:39 +0000
Subject: [Milsurplus] [MRCA] BC-611 Operational Question
In-Reply-To: <CABdVoaB+_o_ncomez=i7epjkFbucQHPUxb1wDfhCAGZZvmuiOg@mail.gmail.com>
References: <81D6EEF5-4265-4808-A7BD-F4F31176A011.ref@aol.com>
	<81D6EEF5-4265-4808-A7BD-F4F31176A011@aol.com>
	<CABdVoaB+_o_ncomez=i7epjkFbucQHPUxb1wDfhCAGZZvmuiOg@mail.gmail.com>
Message-ID: <DM8P220MB0472E707C2B092C06199B0CBB8712@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

What is considered ?Authentic and Proper? and what is not. Many of you may know about my M151 that I run around with and do remote opps both voice and RTTY and have had no end to people coming up to me and wanting to enlighten me on how and what I am doing is wrong, how a VRC-12 set would never be installed along with a GRC-106 or the tie down rings are round instead of D shaped or any numb of incorrect things I am doing. I installed a coke bottle opener on one of the antenna brackets just for that reason and that?s always a big hit at the Military Vehicle Shows that I do.  The thing is I am out there in the field bringing this history back to life and having a lot of fun doing it. Think if you want to install a command set on some plywood and drag it out in the field and use it that would be great, and within the context of it not being what may have been appropriate or proper or whatever I would like to put forward this video ? With The 17th Photo Reconnaissance Squadron on Guadalcanal? Air Forces Film Report, 48-A The relevant scenes are about one minute in and at around nine minutes in is a wide shot of the communications center that also shows the maintenance bench on the side.
So, looking forward to hearing about your field opps with the command set in the future and have to say that?s what you?re doing to me sounds like a worthwhile project!
Link to video:

https://www.youtube.com/watch?v=FGMdgk4uApk

Ray F/KA3EKH


From: Mark K3MSB <mark.k3msb at gmail.com>
Sent: Wednesday, October 2, 2024 7:50 PM
To: MARK DORNEY <mkdorney at aol.com>
Cc: MARK DORNEY via MRCA <mrca at mailman.qth.net>; Ray Fantini <RAFANTINI at salisbury.edu>; List Milsurplus <milsurplus at mailman.qth.net>
Subject: Re: [MRCA] BC-611 Operational Question


I was not even remotely implying that my SCR-274N used in the feld was authentic.   Clearly it is not.    I would be taking it into the field (in a tent) to show (demo) a working WW II USAAF Radio Set.   It will be explained that it was an airborne system used on Allied aircraft.   They will have a small 117 generator available for powering the power supply I bring along (which is my 28V power supply with two tractor batteries floated across the output).    I of course will not be demoing it all the time;  in the off times I suggested that just the two batteries could power the Navigation receiver (0.19 to 0.55) tuned to a beacon.   Still in the early planning stages.....

Mark K3MSB











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From kb8tq at n1k.org  Thu Oct  3 09:56:56 2024
From: kb8tq at n1k.org (Bob Camp)
Date: Thu, 3 Oct 2024 09:56:56 -0400
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <PH0PR20MB437417A4472C19C7DECA6750E4712@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
	<CAFZq+EyBfOH+5ZzGkvcW-CdphOupG70tpi8d67YNnL03Ox8tVg@mail.gmail.com>
	<b0c904e3-da71-8541-e628-edaf199004c0@bruteforcedevelopment.com>
	<CAFZq+Ez4mb0vXw0hmxiX8SQV36tztto9jJ3NeUr_x3FY41HMFw@mail.gmail.com>
	<520ecb6d-bf99-cd16-07d5-943d703be332@bruteforcedevelopment.com>
	<PH0PR20MB437417A4472C19C7DECA6750E4712@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <A46B3E41-F139-431D-85E1-8162689F26EB@n1k.org>

Hi

If you are standing on the ground, you couple to it pretty well on 80M. That helps your antenna more than a little bit. 

If you are floating along under a parachute at thousands of feet up ? not much coupling to the ground. 

For added fun: While you are dropping through the air, try tweaking the antenna loading for best field strength :) :) :). Then see how much you changed things.

The other very real issue with these radios is that the batteries have a finite life. It?s not alway obvious just how ?close to empty? you might be. 

Bob

> On Oct 3, 2024, at 3:42?AM, Hubert Miller <Kargo_cult at msn.com> wrote:
> 
> So altho the 611 antenna is ~1/80th wavelength, it is not like really a 'point source', and that the polarization of the handheld is important ?
> I do see that there will be a null directly above ( and below ) the vertical antenna.
> 
> I read some years back, that someone had been trying out a 611 radio, this is postwar, and they happened to try touching the 611 antenna to the base of a metal flagpole.
> This notably increased the signal strength, which translates to distance, i suppose. I still do not understand how that would work. In the radio you have a loading coil working 
> with apretty specific low capacitance antenna. I suppose this assumes the metal flagpole was not perfectly grounded and that its capacitance was still in the 2 or low 3 digits
> capacity, so that the percentage of wavelength of this new antenna addition overcame any mistuning of the output circuit. 
> 
> I friend has a 611 and told me he can hear a Chinese SW broadcaster on it, so it's not the receiver that limits the working distance.
> -Hue Miller 
> ______________________________________________________________
> 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 joeconnor53 at yahoo.com  Thu Oct  3 10:09:06 2024
From: joeconnor53 at yahoo.com (Joe Connor)
Date: Thu, 3 Oct 2024 14:09:06 +0000 (UTC)
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <A46B3E41-F139-431D-85E1-8162689F26EB@n1k.org>
References: <CABdVoaCKff70DtVXV4k3VzDmG6R+k=SekChkiy1DWXKzpf6gcA@mail.gmail.com>
	<CAFZq+EyBfOH+5ZzGkvcW-CdphOupG70tpi8d67YNnL03Ox8tVg@mail.gmail.com>
	<b0c904e3-da71-8541-e628-edaf199004c0@bruteforcedevelopment.com>
	<CAFZq+Ez4mb0vXw0hmxiX8SQV36tztto9jJ3NeUr_x3FY41HMFw@mail.gmail.com>
	<520ecb6d-bf99-cd16-07d5-943d703be332@bruteforcedevelopment.com>
	<PH0PR20MB437417A4472C19C7DECA6750E4712@PH0PR20MB4374.namprd20.prod.outlook.com>
	<A46B3E41-F139-431D-85E1-8162689F26EB@n1k.org>
Message-ID: <89691397.15745810.1727964546174@mail.yahoo.com>

 Remember the G.I. workaround for the short life span of the BC-611's special 1.5V battery? They'd use a regular D cell flashlight battery and hold it in place with a 50-cal. shell casing.
? ? ? ? ? ? ? ? ? ? ? ? ? ?Joe Connor
    On Thursday, October 3, 2024 at 09:57:50 AM EDT, Bob Camp <kb8tq at n1k.org> wrote:  
 
 Hi

If you are standing on the ground, you couple to it pretty well on 80M. That helps your antenna more than a little bit. 

If you are floating along under a parachute at thousands of feet up ? not much coupling to the ground. 

For added fun: While you are dropping through the air, try tweaking the antenna loading for best field strength :) :) :). Then see how much you changed things.

The other very real issue with these radios is that the batteries have a finite life. It?s not alway obvious just how ?close to empty? you might be. 

Bob

> On Oct 3, 2024, at 3:42?AM, Hubert Miller <Kargo_cult at msn.com> wrote:
> 
> So altho the 611 antenna is ~1/80th wavelength, it is not like really a 'point source', and that the polarization of the handheld is important ?
> I do see that there will be a null directly above ( and below ) the vertical antenna.
> 
> I read some years back, that someone had been trying out a 611 radio, this is postwar, and they happened to try touching the 611 antenna to the base of a metal flagpole.
> This notably increased the signal strength, which translates to distance, i suppose. I still do not understand how that would work. In the radio you have a loading coil working 
> with apretty specific low capacitance antenna. I suppose this assumes the metal flagpole was not perfectly grounded and that its capacitance was still in the 2 or low 3 digits
> capacity, so that the percentage of wavelength of this new antenna addition overcame any mistuning of the output circuit. 
> 
> I friend has a 611 and told me he can hear a Chinese SW broadcaster on it, so it's not the receiver that limits the working distance.
> -Hue Miller 
> ______________________________________________________________
> 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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From kargo_cult at msn.com  Thu Oct  3 16:08:21 2024
From: kargo_cult at msn.com (Hubert Miller)
Date: Thu, 3 Oct 2024 20:08:21 +0000
Subject: [Milsurplus] [MRCA] BC-611 Operational Question
Message-ID: <PH0PR20MB4374F4BD7E55DF7182DE1828E4712@PH0PR20MB4374.namprd20.prod.outlook.com>

Ray, that was one great film! Thanks for posting the link !
Some thoughts of mine while viewing:
1- humans can get so much done cooperatively. Like getting thousands of men and heavy machines and continuous supply lines to some obscure So. Pacific areas.
2- it must be hell when some pilot fails for unknown reason to return and you have to erase his name from the board. As stated in the film, but not dwellt upon, even a recon squadron has losses.
3- US military should have permitted and issued short pants for tropical duty.
4- i like the ever evident sense of humor among our troops.
5- compare the actual engine mtce work in this real film against the obvious pointless idling and pretend "work" seen in some war movies. "Thin Red Line" comes to mind, but i may be wrong and remembering a particular scene from some other movie.
6- i worry about how those P-39s did against the Japanese type Zero.
-Hue Miller



Sent from my Galaxy


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From brooke at pacific.net  Thu Oct  3 18:19:11 2024
From: brooke at pacific.net (Brooke Clarke)
Date: Thu, 3 Oct 2024 15:19:11 -0700
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <mailman.1367.1727927652.13568.milsurplus@mailman.qth.net>
References: <mailman.1367.1727927652.13568.milsurplus@mailman.qth.net>
Message-ID: <287c56e5-c440-f069-abf6-b3710598a69a@pacific.net>

Hi Mark:

The problem with the BC-611 is that the antenna (1 meter) is very short compared to a 1/4 wavelength (20 meters) so it's 
very inefficient.
When the operator is standing on the Earth (ground) there's some coupling from the radio metal box to the operator to 
the ground acting as a counterpoise.
But when the BC-611 is used from a parachute (without a wire counterpoise) the radiation efficiency will be extremely 
low.? This may explain the lack of contacts.
https://prc68.com/I/BC611.shtml

-- 
Have Fun,

Brooke Clarke, N6GCE, MSEE
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, 2 Oct 2024 20:36:27 -0700
> From:boeing377 at gmail.com
> To: Facility 406<facility_406 at bruteforcedevelopment.com>
> Cc: List Milsurplus<milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] BC-611 Operational Question
> Message-ID:
> 	<CAFZq+Ez4mb0vXw0hmxiX8SQV36tztto9jJ3NeUr_x3FY41HMFw at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> I?m an EE and agree with your theoretical analysis but I tried many
> different antenna orientations during descent hoping to contact my friend
> on the DZ. No joy until I was about half a mile from him vertically.
>
> Mark
> AF6IM

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From Kargo_cult at msn.com  Thu Oct  3 21:32:28 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Fri, 4 Oct 2024 01:32:28 +0000
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <287c56e5-c440-f069-abf6-b3710598a69a@pacific.net>
References: <mailman.1367.1727927652.13568.milsurplus@mailman.qth.net>
	<287c56e5-c440-f069-abf6-b3710598a69a@pacific.net>
Message-ID: <PH0PR20MB437414134209280A44B61479E4722@PH0PR20MB4374.namprd20.prod.outlook.com>

  1.  is this true? That the polarization of the BC-611 in your hand actually affects the opposite station reception ?
  2.  I guesstimate the 611 case to ground capacitance as 20 - 50 pF. That of course is my crude guesstimate. So yes,
this enters into the tuning of the antenna, which has a quite low overall capacitance to ground, and the high L low C
antenna tuning is critical. So i agree, the antenna tuning may be way off, operating the thing in space.

  1.  the incident i mentioned, improving operation by touching the 611 antenna to a metal flagpole: i think now, how good
could that electrical connection have been, really? I think more likely this brought a stronger signal in via capacitive
coupling to the flagpole. I don't think now, this enhanced ERP at all. I remembered way back at the start of my radio
interest, as a child, listening to a portable radio, and grabbing the radio's metal handle parts enhanced reception greatly.
-Hue Miller
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From facility_406 at bruteforcedevelopment.com  Thu Oct  3 22:57:13 2024
From: facility_406 at bruteforcedevelopment.com (Facility 406)
Date: Thu, 3 Oct 2024 19:57:13 -0700
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <PH0PR20MB437414134209280A44B61479E4722@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <mailman.1367.1727927652.13568.milsurplus@mailman.qth.net>
	<287c56e5-c440-f069-abf6-b3710598a69a@pacific.net>
	<PH0PR20MB437414134209280A44B61479E4722@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <9a172e4b-3d32-a5bb-5d30-d3a7e6cbb158@bruteforcedevelopment.com>

On 10/3/2024 18:32, Hubert Miller wrote:
>  1. is this true? That the polarization of the BC-611 in your hand
>     actually affects the opposite station reception ?

Absolutely.  Polarization works both ways.
> could that electrical connection have been, really? I think more likely 
> this brought a stronger signal in via capacitive

At least as good, if not better, than all the RF connections through 
capacitors within the radio.

Kurt


From Kargo_cult at msn.com  Thu Oct  3 23:01:57 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Fri, 4 Oct 2024 03:01:57 +0000
Subject: [Milsurplus] BC-611 Operational Question
In-Reply-To: <9a172e4b-3d32-a5bb-5d30-d3a7e6cbb158@bruteforcedevelopment.com>
References: <mailman.1367.1727927652.13568.milsurplus@mailman.qth.net>
	<287c56e5-c440-f069-abf6-b3710598a69a@pacific.net>
	<PH0PR20MB437414134209280A44B61479E4722@PH0PR20MB4374.namprd20.prod.outlook.com>
	<9a172e4b-3d32-a5bb-5d30-d3a7e6cbb158@bruteforcedevelopment.com>
Message-ID: <PH0PR20MB43749A85D3606FA363C4C3BFE4722@PH0PR20MB4374.namprd20.prod.outlook.com>

So, to be perfectly clear, to me at least, using the 611 at the extreme edge of its range, which is beyond 'near field' effect, whether you have the radio upright or tilted horizontal,
at approx the same height, does make a strong difference in the receiving station's level ?
-Hue Miller 

From RAFANTINI at salisbury.edu  Sat Oct  5 15:01:48 2024
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Sat, 5 Oct 2024 19:01:48 +0000
Subject: [Milsurplus] Was BC-611 now short antennas and Sky Diving
Message-ID: <DM8P220MB047289B3DCF2292CE45B3EE0B8732@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Question for smart people, you would think I know this but as my wife will often remind me that I am not the sharpest tool in the shed. I think a half wavelength at 3885 is a hundred twenty feet or so, assume the 611 has a huge coil to make up for this short antenna? Mr. Smith once told me that although you can electrically shorten the active side of a antenna with a coil that dose nothing for your other side of the antenna, the counterpoise and for that to be most effective it?s got to be some sort of fraction of a wavelength. Dam, the counterpoise of the BC-611 is like one foot of case! Maybe there is some component of grounding thru your skin and boots or whatever but what if you?re wearing gloves? This is where the smart part comes in, I am assuming the efficiency of that short antenna and counterpoise results in an overall antenna efficiency of about lest then five percent! Certain some smart person out there can run the program and come back with an exact number.
Think about this in the context of parachuting, even if the antenna was fully extended the ground or counterpoise side of the antenna is like one foot if you were wearing gloves, I don?t think polarization or any of that stuff matters with that small antenna and radio.
My real question is how in the hell did you free fall , deploy the chute and all that other sky diving stuff and hold on to the radio in the first place? That?s an impressive feet.
Trivia! Two radios I have always like from WW2 are the DAV and its evil twin sister the MAB, don?t know if its true but I was told the MAB was designed and deployed as an air assault radio. It used a throat microphone and a weird skull cap that fit under a helmet with the radio strapping to your chest.

Ray F/KA3EKH


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From Kargo_cult at msn.com  Tue Oct  8 21:19:32 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Wed, 9 Oct 2024 01:19:32 +0000
Subject: [Milsurplus] King KMC 95 Transceiver...and marine electronics
In-Reply-To: <CAFZq+EzVDx0ieFmZSBaomZMPtH2D03X+niFzvpwbXNZmYFXXqw@mail.gmail.com>
References: <ab798b42-5d04-4193-812c-e66288da750a.ref@att.net>
	<ab798b42-5d04-4193-812c-e66288da750a@att.net>
	<CAFZq+EzVDx0ieFmZSBaomZMPtH2D03X+niFzvpwbXNZmYFXXqw@mail.gmail.com>
Message-ID: <PH0PR20MB4374CA8FAC29465CD7F4A5D9E47F2@PH0PR20MB4374.namprd20.prod.outlook.com>

( related only by "marine electronics" topic )
I went for an early evening walk on the beach here. Near the jetty i was astonished to see the wheelhouse of a fish boat buried up to one half the wheel. 
The boat had wrecked a couple days before, trying to enter the jetty channel during a storm, aided by Coast Guard spotlights, but a huge wave smashed 
the boat. I had heard some of the activity on my scannner, but i am usually only half listening, and by the time i clued in, they were already talking about
recovering bodies on the beach. Anyway when i saw the wheelhouse i thought, i would really like to get the radio. Even if it was innundated with salt 
water, i could probably wash it out and maybe recover it. The radio was gone. I don't know if they used a built in radio or HT. I did see a GPS navigation
unit, which i dismounted and took. It had sea water still in it so i put it in a trash bag in my van, to wash out later. "Later" became much later and i 
eventually forgot about it in the van and threw out the bag thinking it just ordinary garbage. Just as well. A friend when i told him about my harvest of the
GPS told me it was "bad Ju-Ju"  ( bad luck ) to keep it. Anyway the situation solved itself. The half buried wheelhouse was removed by the state a few 
days later. 

I have a Northern Radio boat radio manual which says vapor from the fish caught is acidic or sulphuric and degrades electronics.
Forwarding to NWVRS newsletter for ( maybe ) general interest. 
-Hue Miller 

From RAFANTINI at salisbury.edu  Wed Oct  9 09:06:32 2024
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Wed, 9 Oct 2024 13:06:32 +0000
Subject: [Milsurplus] Ju-ju
Message-ID: <DM8P220MB04726E70D2CB6A544ED13B04B87F2@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Think we discussed it before, a radio that was removed from the crash site of the Lady Be Good that was discovered sixteen years after its disappearance was installed in one of the recovery aircraft, a C-47 that was later lost in the Mediterranean. And according to the National Museum of the United States Air Force a U.S. Army "Otter" airplane in which a "Lady Be Good" seat armrest was installed crashed in the Gulf of Sidra with 10 men aboard. No trace was found of any of them; one of the few pieces washed ashore was the armrest of the "Lady Be Good.
Lot to be said for the "Ju-Ju" thing.  Question: What type of radio was removed from the Lady Be Good? I always thought it was an AN/ARC-1 VHF Transceiver but others disagree.

Ray F/KA3EKH

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From r390a.urr at gmail.com  Wed Oct  9 09:50:06 2024
From: r390a.urr at gmail.com (Dave Merrill)
Date: Wed, 9 Oct 2024 08:50:06 -0500
Subject: [Milsurplus] Yugoslavian Straight Key
Message-ID: <CAGRTi8USsa=-L7EJq7FNXJFTN3n5Put0YE9Vs_SjAa=oE78Q9g@mail.gmail.com>

eBay item 335433091710

What are the controls for??

Dave N9ZC
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From kgordon2006 at frontier.com  Wed Oct  9 10:24:11 2024
From: kgordon2006 at frontier.com (kgordon2006)
Date: Wed, 09 Oct 2024 07:24:11 -0700
Subject: [Milsurplus] Ju-ju
In-Reply-To: <DM8P220MB04726E70D2CB6A544ED13B04B87F2@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <1338229571.683634.1728483855001@frontier.com>

I have a book here on that incident. I'll look in it to see if it reports any details on that radio.Standby for a bit...Ken W7EKBSent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
-------- Original message --------From: Ray Fantini via Milsurplus <milsurplus at mailman.qth.net> Date: 10/9/24  06:06  (GMT-08:00) To: List Milsurplus <milsurplus at mailman.qth.net> Subject: [Milsurplus] Ju-ju 

Think we discussed it before, a radio that was removed from the crash site of the Lady Be Good that was discovered sixteen years after its disappearance was installed in one of the recovery aircraft, a C-47 that was later lost in the Mediterranean.
 And according to the National Museum of the United States Air Force a U.S. Army "Otter" airplane in which a "Lady Be Good" seat armrest was installed crashed in the Gulf of Sidra with 10 men aboard. No trace was found of any of them; one of the few pieces
 washed ashore was the armrest of the "Lady Be Good. 
Lot to be said for the ?Ju-Ju? thing.? Question: What type of radio was removed from the Lady Be Good? I always thought it was an AN/ARC-1 VHF Transceiver but others disagree.
?
Ray F/KA3EKH
?



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From k7dfw at proton.me  Wed Oct  9 13:23:46 2024
From: k7dfw at proton.me (Rolynn Prechtl K7DFW)
Date: Wed, 09 Oct 2024 17:23:46 +0000
Subject: [Milsurplus] Yugoslavian Straight Key (Dave Merrill)
Message-ID: <ngv1k3FVw7S3yuFIdri-CS6i64OYHTuW_RXzMKTG7EdiEClB7AwIJiY3RMfoFgolBFXzWCyAzoSwDvwtaAXEzkEZ4JPXdDnCZiWp9sa12OA=@proton.me>

<https://www.tronico.fi/OH6NT/keys.htm>

Scroll to K97

K7DFW

Sent with [Proton Mail](https://proton.me/mail/home) secure email.
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From kargo_cult at msn.com  Wed Oct  9 16:58:48 2024
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 9 Oct 2024 20:58:48 +0000
Subject: [Milsurplus] Ju-ju
Message-ID: <PH0PR20MB4374DC21A5CB8FCA89D38C15E47F2@PH0PR20MB4374.namprd20.prod.outlook.com>

I have 3 books on the "Lady Be Good" incident plus the original photo article in LIFE magazine which i read totally captivated at the age of 9 years. One of the radios, IIR  was a BC-348 also. All that gear taken still worked.
The large picture book has some wonderful photos and the text goes into what happened to the plane. In better times maybe Paul Allen or such could have been convinced to pay off some Libyans to get the plane, but extraction would have to be done by Libyans, as the country is too unstable i think
for Westerners to to undertake such project. But by now it's just a jumble of aluminum. This book also has an interesting photo of a Brit plane with 3 person crew that got lost on a training flight and made a landing on the desert. However before they could be found and rescued they all succumbed to heat and thirst. The book i refer to has great photos of the Lady inquiry expedition but i have to fault it for uncalled for photos of the remains of the crew. That strikes me as just ignorant, sensationalist, and insensitive. Many thanks to the author for producing it, kind of his life's work, but as the author seems to me not the brightest filament and a more discerning editor was called for. When i find these 4 items i will put them on Ebay as i really need to move on.
I still have to wonder what ignorant fate befell other items from the plane such as headphones, throat mics, and Command Sets.
-Hue Miller


Sent from my Galaxy

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From Kargo_cult at msn.com  Wed Oct  9 17:36:57 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Wed, 9 Oct 2024 21:36:57 +0000
Subject: [Milsurplus] Yugoslavian Straight Key (Dave Merrill)
In-Reply-To: <ngv1k3FVw7S3yuFIdri-CS6i64OYHTuW_RXzMKTG7EdiEClB7AwIJiY3RMfoFgolBFXzWCyAzoSwDvwtaAXEzkEZ4JPXdDnCZiWp9sa12OA=@proton.me>
References: <ngv1k3FVw7S3yuFIdri-CS6i64OYHTuW_RXzMKTG7EdiEClB7AwIJiY3RMfoFgolBFXzWCyAzoSwDvwtaAXEzkEZ4JPXdDnCZiWp9sa12OA=@proton.me>
Message-ID: <PH0PR20MB437448A68D953300F879B0E5E47F2@PH0PR20MB4374.namprd20.prod.outlook.com>

I have a key by Ericsson, Sweden, and a throat mic by same firm, which came from military surplus out of Germany in the immediate postwar years.
The key is not shown in among the ones pictured on that website.
These 2 items make me wonder if Sweden, besided supplying the Reich with iron ore, also supplied some other items useful to Germany's war effort.
Come to think of it, i have a 'Directory of German Communications Equipment' which shows a large transmitter by Ericsson.
I don't necessarily blame Sweden. If they had not traded with the Reich, it's very likely that the Reich would have simply invaded and taken the country
to get the iron ore. Once Germany's military threat  faded later in the war, Sweden did shut off all iron ore exports to them.
-Hue Miller
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From dlestourgeon at cox.net  Wed Oct  9 21:09:34 2024
From: dlestourgeon at cox.net (Dale LeStourgeon)
Date: Thu, 10 Oct 2024 01:09:34 +0000 (UTC)
Subject: [Milsurplus] Ju-ju
In-Reply-To: <PH0PR20MB4374DC21A5CB8FCA89D38C15E47F2@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB4374DC21A5CB8FCA89D38C15E47F2@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <669010915.53765.1728522574314@mail.yahoo.com>

 Your comments about Lady be Good reminded me of the time I spent a Wheelus AFB in the 60s. They had one of the propellers mounted in front of the officers club. When I moved to OK in the 80s, they had brought it to Tinker AFB and mounted it at the O club. I know the O club is gone so I guess the propeller is somewhere on base.Dale K5AJZ

    On Wednesday, October 9, 2024 at 03:59:05 PM CDT, Hubert Miller <kargo_cult at msn.com> wrote:  
 
  I have 3 books on the "Lady Be Good" incident plus the original photo article in LIFE magazine which i read totally captivated at the age of 9 years. One of the radios, IIR? was a BC-348 also. All that gear taken still worked.?The large picture book has some wonderful photos and the text goes into what happened to the plane. In better times maybe Paul Allen or such could have been convinced to pay off some Libyans to get the plane, but extraction would have to be done by Libyans, as the country is too unstable i think?for Westerners to to undertake such project. But by now it's just a jumble of aluminum. This book also has an interesting photo of a Brit plane with 3 person crew that got lost on a training flight and made a landing on the desert. However before they could be found and rescued they all succumbed to heat and thirst. The book i refer to has great photos of the Lady inquiry expedition but i have to fault it for uncalled for photos of the remains of the crew. That strikes me as just ignorant, sensationalist, and insensitive. Many thanks to the author for producing it, kind of his life's work, but as the author seems to me not the brightest filament and a more discerning editor was called for. When i find these 4 items i will put them on Ebay as i really need to move on.I still have to wonder what ignorant fate befell other items from the plane such as headphones, throat mics, and Command Sets.-Hue Miller

Sent from my Galaxy
______________________________________________________________
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From holden7471 at msn.com  Fri Oct 11 12:27:03 2024
From: holden7471 at msn.com (howard holden)
Date: Fri, 11 Oct 2024 16:27:03 +0000
Subject: [Milsurplus] Fall Classic Exchange 2024 phone
Message-ID: <BY5PR14MB4001D057474FBC65CD0509C0C4792@BY5PR14MB4001.namprd14.prod.outlook.com>


From arc5 at ix.netcom.com  Fri Oct 11 13:30:20 2024
From: arc5 at ix.netcom.com (arc5 at ix.netcom.com)
Date: Fri, 11 Oct 2024 12:30:20 -0500
Subject: [Milsurplus] Mystery Box
Message-ID: <a2db2344-8bbc-4e04-af30-8850e8e4b390@localhost>

Anyone recognize this box?
Does anyone need it?

https://photos.app.goo.gl/XUXadhtJS1qfSuL38

https://photos.app.goo.gl/UxTm8xV3qkE2iW9D9

Sent using myEarthLink

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From holden7471 at msn.com  Fri Oct 11 14:56:01 2024
From: holden7471 at msn.com (howard holden)
Date: Fri, 11 Oct 2024 18:56:01 +0000
Subject: [Milsurplus] Fall Classic Exchange 2024 phone
Message-ID: <BY5PR14MB400163D048408E472E685342C4792@BY5PR14MB4001.namprd14.prod.outlook.com>

The Fall 2024 Classic Exchange Phone is set for Sunday Oct 13 1300Z to Oct 14 0700Z and Tuesday Oct 15 1300Z to Oct 16 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.

There will be CX recognition for high scores in Phone and CW as well as overall.

Classic Exchange Spotting Page: http://qsopartyhub.com/classic-exchange-spots.php

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
Or Ron K2RP e-mail: Ron k2rp at arrl.net
Or contact me!
73, Howie WB2AWQ/7
WB2AWQ at ARRL.net

From holden7471 at msn.com  Sun Oct 13 21:43:07 2024
From: holden7471 at msn.com (howard holden)
Date: Mon, 14 Oct 2024 01:43:07 +0000
Subject: [Milsurplus] Classic Exchange CW Fall 2024
Message-ID: <BY5PR14MB40013103A06B5EC06A88104DC4442@BY5PR14MB4001.namprd14.prod.outlook.com>

The Classic Exchange CW is set to take place Sunday Oct 20 1300Z to Oct 21 0700Z and Tuesday Oct 22 1300Z to Oct 23 0700Z

The Classic Exchange (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

There will be CX recognition for high scores in Phone and CW as well as overall. 

Classic Exchange Spotting Page: http://qsopartyhub.com/classic-exchange-spots.php

CW          160M	80M   	40M       20M        15M       10M        6M            2M
  1.810  3.545 	7.045    14.045   21.04    28.045   50.095   144.100
	
Also 7.100 to 7.125 Mc to avoid contest congestion!
 
Listen up and down 5 to 10 Kc for crystal controlled stations

Full details at: http://classicexchange.org/announcments/CX_Rules.pdf


Questions? Contact Mark K3MSB e-mail: myscupper at gmail.com
Or Ron K2RP e-mail: Ron k2rp at arrl.net
Or contact me!
73, Howie WB2AWQ/7
WB2AWQ at ARRL.net


From navy.radio at gmail.com  Mon Oct 14 12:15:32 2024
From: navy.radio at gmail.com (Nick England)
Date: Mon, 14 Oct 2024 12:15:32 -0400
Subject: [Milsurplus] Why 50 ohm coax?
Message-ID: <CAB55hNcaq-1+sag6qG1tNdrWDQbC2H3r-Mk3u7CTArSgtHwC3g@mail.gmail.com>

>From a Trompeter tech paper - something I never heard before
-----------
The most efficient Impedance to use
when transmitting any signal considering the voltages, cur?
rents and powers to be transmitted is 75 ohm, and would be
the only standard if these were the sole considerations. The
telephone industry, followed by the TV Industry, use 75 ohm
almost exclusively for the transmission of video, baseband
and I. F. frequencies. The military services during the period
1920 through 1940, were faced with a differing need for low
radiation angle omnidirectional antennas for broadcasting
ship to ship, airport tower to low flying aircraft and base
station to ground troops. The only antenna that would give
this performance was the vertical ground plane In Its many
forms, which turned out to be 50 ohm . The military standard?
ized on 50 ohm impedance and spent vast sums of money
developing cables and connectors for all of their coax
systems. At one time a military agency, Armed Services
Electro Standard Agency (ASESA) designed all military
coax components and assigned the connector UG and
cable RG designations. This has since been replaced with
the latest government/Industry committees cooperating
and producing the current general connector standard MIL?
C-39012 primarily for 50 ohm usage.
------------------
Nick England K4NYW
www.navy-radio.com
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From ark at ar88.net  Mon Oct 14 13:00:04 2024
From: ark at ar88.net (Al Klase)
Date: Mon, 14 Oct 2024 13:00:04 -0400
Subject: [Milsurplus] Why 50 ohm coax?
In-Reply-To: <CAB55hNcaq-1+sag6qG1tNdrWDQbC2H3r-Mk3u7CTArSgtHwC3g@mail.gmail.com>
References: <CAB55hNcaq-1+sag6qG1tNdrWDQbC2H3r-Mk3u7CTArSgtHwC3g@mail.gmail.com>
Message-ID: <62459dea-56ba-4c00-b8fc-8b8db805ac68@ar88.net>

Nick,

Interesting.? 75 ohms is really close to a dipole in free space.? I had 
wondered about that.

Thanks,
AL


On 10/14/2024 12:15 PM, Nick England wrote:
> From a Trompeter tech paper - something I never heard before
> -----------
> The most efficient Impedance to use
> when transmitting any signal considering the voltages, cur?
> rents and powers to be transmitted is 75 ohm, and would be
> the only standard if these were the sole considerations. The
> telephone industry, followed by the TV Industry, use 75 ohm
> almost exclusively for the transmission of video, baseband
> and I. F. frequencies. The military services during the period
> 1920 through 1940, were faced with a differing need for low
> radiation angle omnidirectional antennas for broadcasting
> ship to ship, airport tower to low flying aircraft and base
> station to ground troops. The only antenna that would give
> this performance was the vertical ground plane In Its many
> forms, which turned out to be 50 ohm . The military standard?
> ized on 50 ohm impedance and spent vast sums of money
> developing cables and connectors for all of their coax
> systems. At one time a military agency, Armed Services
> Electro Standard Agency (ASESA) designed all military
> coax components and assigned the connector UG and
> cable RG designations. This has since been replaced with
> the latest government/Industry committees cooperating
> and producing the current general connector standard MIL?
> C-39012 primarily for 50 ohm usage.
> ------------------
> Nick England K4NYW
> www.navy-radio.com <http://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

-- 
ARK Sig Block Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/
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From mstangelo at comcast.net  Mon Oct 14 13:11:23 2024
From: mstangelo at comcast.net (mstangelo at comcast.net)
Date: Mon, 14 Oct 2024 13:11:23 -0400 (EDT)
Subject: [Milsurplus] Why 50 ohm coax?
In-Reply-To: <62459dea-56ba-4c00-b8fc-8b8db805ac68@ar88.net>
References: <CAB55hNcaq-1+sag6qG1tNdrWDQbC2H3r-Mk3u7CTArSgtHwC3g@mail.gmail.com>
	<62459dea-56ba-4c00-b8fc-8b8db805ac68@ar88.net>
Message-ID: <657640120.73527.1728925884033@connect.xfinity.com>

This is the reasoning I have read from multiple sources:

<https://www.microwaves101.com/encyclopedias/why-fifty-ohms>

77 ohms provided the lowest loss while 30 ohms handled the most power. An impedance around 50 ohms provided a compromise.

Mike N2MS
 
> On 10/14/2024 1:00 PM EDT Al Klase <ark at ar88.net> wrote:
> 
> 
> Nick,
>  
>  Interesting. 75 ohms is really close to a dipole in free space. I had wondered about that.
>  
>  Thanks,
>  AL
>  
>  
> 
> On 10/14/2024 12:15 PM, Nick England wrote:
> 
> > From a Trompeter tech paper - something I never heard before
> > 
> > -----------
> > The most efficient Impedance to use
> >  when transmitting any signal considering the voltages, cur?
> >  rents and powers to be transmitted is 75 ohm, and would be
> >  the only standard if these were the sole considerations. The
> >  telephone industry, followed by the TV Industry, use 75 ohm
> >  almost exclusively for the transmission of video, baseband
> >  and I. F. frequencies. The military services during the period
> >  1920 through 1940, were faced with a differing need for low
> >  radiation angle omnidirectional antennas for broadcasting
> >  ship to ship, airport tower to low flying aircraft and base
> >  station to ground troops. The only antenna that would give
> >  this performance was the vertical ground plane In Its many
> >  forms, which turned out to be 50 ohm . The military standard?
> >  ized on 50 ohm impedance and spent vast sums of money
> >  developing cables and connectors for all of their coax
> >  systems. At one time a military agency, Armed Services
> >  Electro Standard Agency (ASESA) designed all military
> >  coax components and assigned the connector UG and
> >  cable RG designations. This has since been replaced with
> >  the latest government/Industry committees cooperating
> >  and producing the current general connector standard MIL?
> >  C-39012 primarily for 50 ohm usage.

From farmer.rob.flory at gmail.com  Mon Oct 14 13:55:08 2024
From: farmer.rob.flory at gmail.com (Rob Flory)
Date: Mon, 14 Oct 2024 13:55:08 -0400
Subject: [Milsurplus] Why 50 ohm Coax?
Message-ID: <CAFcNxxVquhEwpPh+jigynjLNeJY8JEDwedqacAFknhioAEG8dw@mail.gmail.com>

I recall from Electromagnetic Theory class that 75 ohms was lowest loss,
and 50 (52?) ohms was maximum power handling.

Wouldn't be able to do those derivations anymore, but if you want to nerd
out on it, look at J.D. Kraus Electromagnetics or maybe Antennas.

RF
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From sbjohnston at aol.com  Mon Oct 14 15:52:07 2024
From: sbjohnston at aol.com (sbjohnston at aol.com)
Date: Mon, 14 Oct 2024 19:52:07 +0000 (UTC)
Subject: [Milsurplus] Why 50 ohm coax?
In-Reply-To: <mailman.77.1728925214.21013.milsurplus@mailman.qth.net>
References: <mailman.77.1728925214.21013.milsurplus@mailman.qth.net>
Message-ID: <1312096990.1753439.1728935527031@mail.yahoo.com>

Quoted paper:

The military standardized on 50 ohm impedance and?spent vast sums of money developing cables and connectors 

"Vast sums?"? I'm sure they thought that at the time, but by today's standards I'm sure it would seem insignificant.?? And it actually had a relatively meaningful impact, unlike many other projects.
Steve WD8DAS?? 

sbjohnston at aol.com?? 
http://www.wd8das.net/?? http://af4k-crystals.com/?? 
--------------------------------------------------------------------?? 
Radio is your best entertainment value.?? 
--------------------------------------------------------------------?? 

Mein Ohr ganz nah am Weltempf?nger...
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From RAFANTINI at salisbury.edu  Tue Oct 15 14:22:29 2024
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Tue, 15 Oct 2024 18:22:29 +0000
Subject: [Milsurplus] Torn E.b. EW.b power supply video
Message-ID: <DM8P220MB047242DF7384EE1FA8C4AC8AB8452@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Never ending list of projects around here, this is the latest one that I did for a client. Think the next thing will be building up the interconnect cable from the power supply to the receiver itself.

https://www.youtube.com/watch?v=n7friNQrm78

Think the next upcoming videos will be on the Collins KWM-1 transceiver, AN/GRC-9 radios and thinking about doing a new video on the BC-348Q conversions being the first one I put up was fifteen years ago and in all that time have taken that same radio and changed back to an all original front panel and a couple other things along that line. Certain that I will be doing another operational video of the Able Archer - 83  event coming up next month.

Ray F/KA3EKH

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From sbjohnston at aol.com  Tue Oct 15 19:42:26 2024
From: sbjohnston at aol.com (sbjohnston at aol.com)
Date: Tue, 15 Oct 2024 23:42:26 +0000 (UTC)
Subject: [Milsurplus] AF4K Crystals offers free logbook template
In-Reply-To: <mailman.77.1728925214.21013.milsurplus@mailman.qth.net>
References: <mailman.77.1728925214.21013.milsurplus@mailman.qth.net>
Message-ID: <1857847505.2338370.1729035747006@mail.yahoo.com>


Visit the AF4K Crystals website for access to a FREE template for paper logbook pages:
http://www.af4k-crystals.com/
A link to the log files can be found at the bottom of the first two pages.?Thank you.?
73 ? Steve ?WD8DAS

sbjohnston at aol.com?? 
http://www.wd8das.net/?? http://af4k-crystals.com/?? 
--------------------------------------------------------------------?? 
Radio is your best entertainment value.?? 
--------------------------------------------------------------------?? 



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From mstangelo at comcast.net  Wed Oct 16 11:00:16 2024
From: mstangelo at comcast.net (mstangelo at comcast.net)
Date: Wed, 16 Oct 2024 11:00:16 -0400 (EDT)
Subject: [Milsurplus] Ruggedized Buck Converters
Message-ID: <1802403151.337930.1729090816163@connect.xfinity.com>

For those who intend to operate a 12-14 volt radio from a 24-28 volt power scouce I received this product notice from DigiKey about a ruggerdized buck converter:

https://www.digikey.com/en/product-highlight/t/tdk-lambda/rgb-series-ruggedized-buck-converters?utm_medium=email&utm_source=npa&utm_campaign=166225_NPA2410B&utm_content=featuredproduct1CTA2_US_285-TDK_Lambda&utm_cid=1926561&mkt_tok=MTQ0LU5DQi0wMzAAAAGWNGemlUuM2lCY8WBPqgsrmlsqR-CUzYGw_vHVPy_RtcgOSKhsW-99ngec4offBl2IvpKrAjhiIINWErvaDex_42SmVVr75t1XPUm25Ce0K1kZk8JAs2OSoLWPYQ

The metal case may help in RFI attenuation. Has anyone used these modules?

In my design days 40 odd years ago we used Lambda Switchmode supplies to replace large power hungary linear supplies in some equipment. In those days Lambda supplies were manufactured in their plant in Long Island. The only issue we had was intermitent operation with one model. An enginner came of our facility in downtown Manhattan and determined some of the crimps on certain lugs were not applied cirrectly. In those days the switchmode supplies were much larger than comperable supplies today.

Mike N2MS

From kgordon2006 at frontier.com  Wed Oct 16 11:55:24 2024
From: kgordon2006 at frontier.com (Ken Gordon)
Date: Wed, 16 Oct 2024 08:55:24 -0700
Subject: [Milsurplus] Ruggedized Buck Converters
In-Reply-To: <1802403151.337930.1729090816163@connect.xfinity.com>
References: <1802403151.337930.1729090816163@connect.xfinity.com>
Message-ID: <670FE1EC.31857.A4F369C@kgordon2006.frontier.com>

They are reasonably priced, too. Nice. Thank you.

Ken W7EKB

On 16 Oct 2024 at 11:00, mstangelo--- via Milsurplus wrote:

> For those who intend to operate a 12-14 volt radio from a 24-28 volt
> power scouce I received this product notice from DigiKey about a
> ruggerdized buck converter:
> 
> https://www.digikey.com/en/product-highlight/t/tdk-lambda/rgb-series-r
> uggedized-buck-converters?utm_medium=email&utm_source=npa&utm_campaign
> =166225_NPA2410B&utm_content=featuredproduct1CTA2_US_285-TDK_Lambda&ut
> m_cid=1926561&mkt_tok=MTQ0LU5DQi0wMzAAAAGWNGemlUuM2lCY8WBPqgsrmlsqR-CU
> zYGw_vHVPy_RtcgOSKhsW-99ngec4offBl2IvpKrAjhiIINWErvaDex_42SmVVr75t1XPU
> m25Ce0K1kZk8JAs2OSoLWPYQ
> 
> The metal case may help in RFI attenuation. Has anyone used these
> modules?
> 
> In my design days 40 odd years ago we used Lambda Switchmode supplies
> to replace large power hungary linear supplies in some equipment. In
> those days Lambda supplies were manufactured in their plant in Long
> Island. The only issue we had was intermitent operation with one
> model. An enginner came of our facility in downtown Manhattan and
> determined some of the crimps on certain lugs were not applied
> cirrectly. In those days the switchmode supplies were much larger than
> comperable supplies today.
> 
> Mike N2MS
> ______________________________________________________________
> 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



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

From rdesilva49 at gmail.com  Wed Oct 16 15:39:39 2024
From: rdesilva49 at gmail.com (Ron De Silva)
Date: Wed, 16 Oct 2024 19:39:39 +0000
Subject: [Milsurplus] Ruggedized Buck Converters
In-Reply-To: <1802403151.337930.1729090816163@connect.xfinity.com>
References: <1802403151.337930.1729090816163@connect.xfinity.com>
Message-ID: <CAE7jS=3L-1SbZ-sBWnDb5yzvqGkssgiZkAQj20h9xHDdP6SksA@mail.gmail.com>

Great find...and I agree...quality at a very reasonable price!

Ron
NU6F



On Wed, Oct 16, 2024, 3:00 PM mstangelo--- via Milsurplus <
milsurplus at mailman.qth.net> wrote:

> For those who intend to operate a 12-14 volt radio from a 24-28 volt power
> scouce I received this product notice from DigiKey about a ruggerdized buck
> converter:
>
>
> https://www.digikey.com/en/product-highlight/t/tdk-lambda/rgb-series-ruggedized-buck-converters?utm_medium=email&utm_source=npa&utm_campaign=166225_NPA2410B&utm_content=featuredproduct1CTA2_US_285-TDK_Lambda&utm_cid=1926561&mkt_tok=MTQ0LU5DQi0wMzAAAAGWNGemlUuM2lCY8WBPqgsrmlsqR-CUzYGw_vHVPy_RtcgOSKhsW-99ngec4offBl2IvpKrAjhiIINWErvaDex_42SmVVr75t1XPUm25Ce0K1kZk8JAs2OSoLWPYQ
>
> The metal case may help in RFI attenuation. Has anyone used these modules?
>
> In my design days 40 odd years ago we used Lambda Switchmode supplies to
> replace large power hungary linear supplies in some equipment. In those
> days Lambda supplies were manufactured in their plant in Long Island. The
> only issue we had was intermitent operation with one model. An enginner
> came of our facility in downtown Manhattan and determined some of the
> crimps on certain lugs were not applied cirrectly. In those days the
> switchmode supplies were much larger than comperable supplies today.
>
> Mike N2MS
> ______________________________________________________________
> 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  Thu Oct 17 11:48:40 2024
From: mjcal77 at yahoo.com (CL in NC)
Date: Thu, 17 Oct 2024 15:48:40 +0000 (UTC)
Subject: [Milsurplus] Wire size
References: <121114114.1657577.1729180120024.ref@mail.yahoo.com>
Message-ID: <121114114.1657577.1729180120024@mail.yahoo.com>

If you are running an ART13 with its DY17 dynamotor, what size wire are you using between your 28 volt supply and the input to the DY17?  My power source, a 125amp switching supply with a pair of auto batteries across it, voltage sags at initial keyup and causes the ART13 to double click the antenna relay before staying in TX.  It is only a fraction of a second, but enough to worry me. I thought what I am using would be big enough based on how it filled the solder cups in power plug.  The dynamotor is a Ballantine manf. unit with little to no run time as brush and commutator wear seem to show.

Charlie, W4MEC in NC

From old_radio at aol.com  Thu Oct 17 13:47:29 2024
From: old_radio at aol.com (Jim Whartenby)
Date: Thu, 17 Oct 2024 17:47:29 +0000 (UTC)
Subject: [Milsurplus] Wire size
In-Reply-To: <121114114.1657577.1729180120024@mail.yahoo.com>
References: <121114114.1657577.1729180120024.ref@mail.yahoo.com>
	<121114114.1657577.1729180120024@mail.yahoo.com>
Message-ID: <1453652442.3138399.1729187249375@mail.yahoo.com>

The manual says that the Dynamotor requires 27 volts @ 31.5 amps.? I would think that 6 AWG would provide more then enough ampacity @ 55 amps.? 8 AWG has a rating of 40 amps but of course, the insulation temperature rating affects all wire ampacity.? If flexibility is a concern, there is always copper braid and tubing insulation.??https://www.pacergroup.net/content/Tinned-Copper-Braid-Spec-Sheet.pdfhttps://www.mcmaster.com/products/electrical-insulating-tubing/expandable-electrical-insulating-tube-sleeving/
There are many choices.JimLogic: Method used to arrive at the wrong conclusion, with confidence.? Murphy 

    On Thursday, October 17, 2024 at 10:48:54 AM CDT, CL in NC via Milsurplus <milsurplus at mailman.qth.net> wrote:   

 If you are running an ART13 with its DY17 dynamotor, what size wire are you using between your 28 volt supply and the input to the DY17?? My power source, a 125amp switching supply with a pair of auto batteries across it, voltage sags at initial keyup and causes the ART13 to double click the antenna relay before staying in TX.? It is only a fraction of a second, but enough to worry me. I thought what I am using would be big enough based on how it filled the solder cups in power plug.? The dynamotor is a Ballantine manf. unit with little to no run time as brush and commutator wear seem to show.

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 RAFANTINI at salisbury.edu  Thu Oct 17 14:29:12 2024
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Thu, 17 Oct 2024 18:29:12 +0000
Subject: [Milsurplus] MAARC Fall Fest
Message-ID: <DM8P220MB04724F51AED2FAEDAEF46CF8B8472@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

The Mid-Atlantic Antique Radio Club (MAARC) will have their annual Radio Fall Fest in Davidson MD. On Sunday the 20th. I have not attended for several years but it has been a good event in the past, I do plan on being there and maybe selling some stuff in the tailgating section. Am told that Admission will be free! They also have an auction that starts at noon. It will be located at the Davidsonville Family Recreation Center, 3789 Queen Anne Bridge Road, Davidsonville, MD 21035


Ray F/KA3EKH

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From facility_406 at bruteforcedevelopment.com  Thu Oct 17 16:34:50 2024
From: facility_406 at bruteforcedevelopment.com (Facility 406)
Date: Thu, 17 Oct 2024 13:34:50 -0700
Subject: [Milsurplus] Wire size
In-Reply-To: <1453652442.3138399.1729187249375@mail.yahoo.com>
References: <121114114.1657577.1729180120024.ref@mail.yahoo.com>
	<121114114.1657577.1729180120024@mail.yahoo.com>
	<1453652442.3138399.1729187249375@mail.yahoo.com>
Message-ID: <84ba512c-a4c6-38bb-8953-4649224716f4@bruteforcedevelopment.com>

"If flexibility is a concern, there is always copper braid and tubing 
insulation."

I've had trouble with braid shattering if there is vibration.

I've been looking at welding wire from time to time, here are some 
references:

https://powerwerx.com/welding-cable-epdm

https://www.maneywire.com/6-awg-welding-cable-epdm-insulated-p-4034.html#1

This site specs 115A for 6AWG:

https://www.zw-cable.com/products/EPDM_Welding_Cable.html

The EPDM insulation is really good, I've been using a lot of wire 
covered in that for the past few years, I look for it almost exclusively.

Silicone covered is another option, also very, very high current wire, 
and generally super flexible, due to 3,200 strands in this 6AWG wire:

https://www.amazon.com/MMOBIEL-AWG-Electrical-Silicone-Wire/dp/B0CRVMRKG1?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=A3K3JW8N3SXQ63

Kurt






From facility_406 at bruteforcedevelopment.com  Thu Oct 17 17:38:20 2024
From: facility_406 at bruteforcedevelopment.com (Facility 406)
Date: Thu, 17 Oct 2024 14:38:20 -0700
Subject: [Milsurplus] Wire size
In-Reply-To: <1420899234.3235072.1729198671422@mail.yahoo.com>
References: <121114114.1657577.1729180120024.ref@mail.yahoo.com>
	<121114114.1657577.1729180120024@mail.yahoo.com>
	<1453652442.3138399.1729187249375@mail.yahoo.com>
	<84ba512c-a4c6-38bb-8953-4649224716f4@bruteforcedevelopment.com>
	<1420899234.3235072.1729198671422@mail.yahoo.com>
Message-ID: <52d3d2ca-1cb2-d64f-a12d-42facf8b6088@bruteforcedevelopment.com>

On 10/17/2024 13:57, Jim Whartenby wrote:
> Well, that kind of ruins the main braid wire selling point!? <grin>
> Jim

In the late 80's, I found a crate of electrical panel and equipment 
braid pieces used for some industrial application, about 18" long, about 
1" wide, with crimped flat lugs on the ends.  They were fairly heavy, 
about 3/16" thick, but very flexible, like canvas cloth.

I used them to bond everything in a vehicle with multiple radios. 
Engine, frame, body panels, hood, doors, everything I could think of, 
and could bond.

Seemed to work well, AM and FM radio, and 6m to UHF, no noise problems 
at all.  Ignition noise I had previously, had disappeared, with no mods 
to the ignition system, it just need to be within a "sealed" box.

I eventually sold the vehicle to a neighbor, who sold it to another 
neighbor, who dropped by one day.  He wasn't aware I used to own the 
vehicle.

I asked to look it over, and when I popped the hood, the entire engine 
was covered in metal bits, as if someone chopped the bristles off of a 
bunch of wire brushes, then poured the bristles all over everything.

It was a freakin' mess, far too much to practically clean up.

I could see all the flat lugs bolted to everything, the braids had 
literally shattered, and exploded in the engine compartment.

Other braids were somewhat hidden, but I suspect the same thing happened 
to all of them.

I figure that engine and road vibration has set up standing waves within 
the braids, work hardening them, then causing them to shatter like 
glass.  It took a while, I drove the vehicle with them from '97-2001, no 
issues, then it sat for a couple years, sold, then driven for another 
year or so, sold, and a few months after that when I discovered the 
problem.  The first fellow I sold it to was meticulous in his overhaul, 
so if they had shattered before, or during his possession, I would have 
heard about it.  That would suggest the problem happened suddenly when 
the third owner had it.

Outside of that, thinking back, I've seen a few instances, not many, 
2-3, of braid put into a lug for round wire, and crimped, and due to 
vibration, the braid had sheared at the crimp, very smoothly, as if cut 
with a knife.  I also ran into this in an '86 Toyota pickup, the 
negative lead for the battery looked like it had been cut perfectly at 
the lug with a laser, absolutely smooth as glass, due to vibration.

Vibration seems to be the real killer, but exposed braid can go 
EVERYWHERE in a mobile application, like setting off a stick of dynamite 
in a box of steel wool!

Kurt


From mjcal77 at yahoo.com  Fri Oct 18 13:17:07 2024
From: mjcal77 at yahoo.com (CL in NC)
Date: Fri, 18 Oct 2024 17:17:07 +0000 (UTC)
Subject: [Milsurplus] ART 13 mount completed and a parts request
In-Reply-To: <CA+d3itbxOi6hsMcxGh6oJrazF6diNe1J74_njp0RqhyQBfKj-w@mail.gmail.com>
References: <17FF9A3007F43C9E.16272@groups.io>
	<CA+d3itbxOi6hsMcxGh6oJrazF6diNe1J74_njp0RqhyQBfKj-w@mail.gmail.com>
Message-ID: <321881652.1920757.1729271828249@mail.yahoo.com>

 Does anybody have an intact and nicely labeled front cover panel for the ART 13 TU they are willing to part with? Does anybody know of a restorer that can redo that part, paint and labels?


I finished my home made mounts for the ART 13, I hope the pix make it, and believe the number is MT284. There were 2 mounts I know of, one that was a pan with shock mounts, MT198 I think, and one as many have, a pan bolted to the bottom of the ART 13, MT283. The MT284's were bolted to the aircraft and the ART 13 with its MT283 set on it and was secured. Found these plan at AAFRADIO, but cheated. I had purchased a few mounts of various kinds from Fair Radio years ago to be able to get the hold downs and shock mounts from them for the B17 project when needed. So, instead of making my own as in the plans, just retrieved a couple that were the proper size. I also did not build the custom pin guide for the back out of stainless. This required two parts and to be secured by peening over such that it had some play in the hole it was mounted in. I have a lot of 1/4 shaft bushings that simpulated that just fine and were a perfect fit for the pins. The hardest part was bending the .063 aluminum, neither my brake nor my sons would do it, but I did get the bends started, and finished up using 3" X 1/4" thick angle iron pieces to finish them up. So, I am ready now for any flights or earthquakes.

Charlie
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From w2hx at w2hx.com  Fri Oct 18 13:20:06 2024
From: w2hx at w2hx.com (W2HX)
Date: Fri, 18 Oct 2024 17:20:06 +0000
Subject: [Milsurplus] ART 13 mount completed and a parts request
In-Reply-To: <321881652.1920757.1729271828249@mail.yahoo.com>
References: <17FF9A3007F43C9E.16272@groups.io>
	<CA+d3itbxOi6hsMcxGh6oJrazF6diNe1J74_njp0RqhyQBfKj-w@mail.gmail.com>
	<321881652.1920757.1729271828249@mail.yahoo.com>
Message-ID: <PH0PR12MB8821B7D44FB49C9C0A878E32B5402@PH0PR12MB8821.namprd12.prod.outlook.com>

Wow. Great work there. Very jealous!


73 Eugene W2HX
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 CL in NC via Milsurplus
Sent: Friday, October 18, 2024 1:17 PM
To: Milsurplus <milsurplus at mailman.qth.net>
Subject: [Milsurplus] ART 13 mount completed and a parts request

Does anybody have an intact and nicely labeled front cover panel for the ART 13 TU they are willing to part with? Does anybody know of a restorer that can redo that part, paint and labels?


I finished my home made mounts for the ART 13, I hope the pix make it, and believe the number is MT284. There were 2 mounts I know of, one that was a pan with shock mounts, MT198 I think, and one as many have, a pan bolted to the bottom of the ART 13, MT283. The MT284's were bolted to the aircraft and the ART 13 with its MT283 set on it and was secured. Found these plan at AAFRADIO, but cheated. I had purchased a few mounts of various kinds from Fair Radio years ago to be able to get the hold downs and shock mounts from them for the B17 project when needed. So, instead of making my own as in the plans, just retrieved a couple that were the proper size. I also did not build the custom pin guide for the back out of stainless. This required two parts and to be secured by peening over such that it had some play in the hole it was mounted in. I have a lot of 1/4 shaft bushings that simpulated that just fine and were a perfect fit for the pins. The hardest part was bending the .063 aluminum, neither my brake nor my sons would do it, but I did get the bends started, and finished up using 3" X 1/4" thick angle iron pieces to finish them up. So, I am ready now for any flights or earthquakes.

Charlie
_._,_._,_
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You receive all messages sent to this group.

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From mark.k3msb at gmail.com  Fri Oct 18 14:42:51 2024
From: mark.k3msb at gmail.com (Mark K3MSB)
Date: Fri, 18 Oct 2024 14:42:51 -0400
Subject: [Milsurplus] BC-611 with Paratroopers
Message-ID: <CABdVoaChafpwCnYGWRxXqn7LfnK+605JTRWFWdtGj_uz2Yhezw@mail.gmail.com>

This was posted on FaceBook by "WWII Paratroopers is with 11th Airborne
Division Association - "Angels"." -- which are two independent FB groups.

Here's the URL:
https://www.facebook.com/100051289160543/posts/1141153000937661/

What interested me was the BC-611 in the photo.

The FB post starts out:

Given their unique forms of waging war, Paratroopers carried plenty of
gear. The below list gives you an idea of how the Angels of the 511th PIR
packed for their move from Leyte to Mindoro prior to their combat jump onto
Tagaytay Ridge, Luzon in January/February 1945:

[image: image.png]

For those of you that do not use facebook,  there's the rest of the post:

1. Individual Clothing and Equipment:
A: Uniforms
1: Voyage to Mindoro; khaki, steel helmets, boots.
2. Combat; HBT, steel helmets, boots
B. Equipment
1. Individual weapon, bayonet or trench knife
2. Jungle first aid kit
3. Not more than one machete per four man, nor less than 2 per platoon
4. Gas masks not carried on individuals.
5. Other items at discretion of Unit Commanding Officer
C. Packs and rolls
1. Combat (jungle) pack (on all individuals), socks, sweaters, foot powder,
spoon, poncho and combat rations.
2. Squad bundle; HBT, boots, underclothes, socks, blanket, shelter half.
3. Mindoro Roll; jungle hammock and blankets.
D. Rations
1. 10 in 1 until take-off issued by S-4.
2. Combat rations ? two ?X? and two ?D?.
E. How carried
1. On individuals: a. Combat pack, b. Mindoro roll as far as Mindoro only
2. Water borne by S-4 for overland supply; squad bundles.
F. Life Vests
1. One Mae West per individual, issued at Leyte. Leave in aircraft prior to
jump.

73 Mark K3MSB
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From mark.k3msb at gmail.com  Fri Oct 18 14:49:59 2024
From: mark.k3msb at gmail.com (Mark K3MSB)
Date: Fri, 18 Oct 2024 14:49:59 -0400
Subject: [Milsurplus] B-17 Wiring Harnesses
Message-ID: <CABdVoaBq8597kO86ggYuECHnZv7HLYh878Q_mCbVN5NZNPcmRg@mail.gmail.com>

This was on Facebook last night (ahd was originally from Shorpy's).

The description was " 1942. Boeing aircraft plant, Seattle. Production of
B-17 'Flying Fortress' routing wires"

I've often wondered how they made the wiring harnesses.   For this
particular section, metal studs are spaced for length accuracy.

[image: image.png]

73 Mark K3MSB
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From kb8tq at n1k.org  Fri Oct 18 15:02:50 2024
From: kb8tq at n1k.org (Bob Camp)
Date: Fri, 18 Oct 2024 15:02:50 -0400
Subject: [Milsurplus] B-17 Wiring Harnesses
In-Reply-To: <CABdVoaBq8597kO86ggYuECHnZv7HLYh878Q_mCbVN5NZNPcmRg@mail.gmail.com>
References: <CABdVoaBq8597kO86ggYuECHnZv7HLYh878Q_mCbVN5NZNPcmRg@mail.gmail.com>
Message-ID: <5F5AAC55-2215-49C6-B92F-0E14063F26D2@n1k.org>

Hi

Folks still made wiring harnesses that way well into the 1990?s. I?d bet they still do ?..

Bob

> On Oct 18, 2024, at 2:49?PM, Mark K3MSB <mark.k3msb at gmail.com> wrote:
> 
> This was on Facebook last night (ahd was originally from Shorpy's).
> 
> The description was " 1942. Boeing aircraft plant, Seattle. Production of B-17 'Flying Fortress' routing wires"
> 
> I've often wondered how they made the wiring harnesses.   For this particular section, metal studs are spaced for length accuracy.  
> 
> <image.png>
> 
> 73 Mark K3MSB
> 
> 
> ______________________________________________________________
> 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 k4oq.radio at gmail.com  Fri Oct 18 15:50:07 2024
From: k4oq.radio at gmail.com (Mahlon Haunschild)
Date: Fri, 18 Oct 2024 14:50:07 -0500
Subject: [Milsurplus] Milsurplus Digest, Vol 246, Issue 23
In-Reply-To: <mailman.521.1729277422.21013.milsurplus@mailman.qth.net>
References: <mailman.521.1729277422.21013.milsurplus@mailman.qth.net>
Message-ID: <CABL-ZnaY4seTHN0xnYJ=z4nDzmKAEabhmc57wcQFTCvLUL-Xzg@mail.gmail.com>

The same methods are still used today .  Nothing better has been invented
for such low-quantity production associated with high quality and
reliability.

Best regards

Mahlon - N4ZK

On Fri, Oct 18, 2024, 1:50?PM <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. B-17 Wiring Harnesses (Mark K3MSB)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 18 Oct 2024 14:49:59 -0400
> From: Mark K3MSB <mark.k3msb at gmail.com>
> To: List Milsurplus <milsurplus at mailman.qth.net>,       "Military Radio
>         Collectors Association (mrca at mailman.qth.net)"  <
> mrca at mailman.qth.net>
> Subject: [Milsurplus] B-17 Wiring Harnesses
> Message-ID:
>         <
> CABdVoaBq8597kO86ggYuECHnZv7HLYh878Q_mCbVN5NZNPcmRg at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> This was on Facebook last night (ahd was originally from Shorpy's).
>
> The description was " 1942. Boeing aircraft plant, Seattle. Production of
> B-17 'Flying Fortress' routing wires"
>
> I've often wondered how they made the wiring harnesses.   For this
> particular section, metal studs are spaced for length accuracy.
>
> [image: image.png]
>
> 73 Mark K3MSB
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>
> ------------------------------
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
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>
>
> End of Milsurplus Digest, Vol 246, Issue 23
> *******************************************
>
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From ersmar at verizon.net  Fri Oct 18 16:03:24 2024
From: ersmar at verizon.net (Gene Smar)
Date: Fri, 18 Oct 2024 20:03:24 +0000 (UTC)
Subject: [Milsurplus] Milsurplus Digest, Vol 246, Issue 23
In-Reply-To: <CABL-ZnaY4seTHN0xnYJ=z4nDzmKAEabhmc57wcQFTCvLUL-Xzg@mail.gmail.com>
References: <mailman.521.1729277422.21013.milsurplus@mailman.qth.net>
	<CABL-ZnaY4seTHN0xnYJ=z4nDzmKAEabhmc57wcQFTCvLUL-Xzg@mail.gmail.com>
Message-ID: <2134848481.3017240.1729281804333@mail.yahoo.com>

A month ago I picked up an estate's SB-101 to refurbish and hopefully get back on the air. I noted in the assembly manual that this kit also included a factory-built wiring harness, with lacing? included. Can't imagine any other way to wire this complex a radio.
73 de?Gene Smar AD3F?

Sent from my Radio Shack TRS-80 model 100 laptop 
 
  On Fri, Oct 18, 2024 at 3:50 PM, Mahlon Haunschild<k4oq.radio at gmail.com> wrote:   
The same methods are still used today .? Nothing better has been invented for such low-quantity production associated with high quality and reliability.

Best regards

Mahlon - N4ZK

On Fri, Oct 18, 2024, 1:50?PM <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. B-17 Wiring Harnesses (Mark K3MSB)


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

Message: 1
Date: Fri, 18 Oct 2024 14:49:59 -0400
From: Mark K3MSB <mark.k3msb at gmail.com>
To: List Milsurplus <milsurplus at mailman.qth.net>,? ? ? ?"Military Radio
? ? ? ? Collectors Association (mrca at mailman.qth.net)"? <mrca at mailman.qth.net>
Subject: [Milsurplus] B-17 Wiring Harnesses
Message-ID:
? ? ? ? <CABdVoaBq8597kO86ggYuECHnZv7HLYh878Q_mCbVN5NZNPcmRg at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

This was on Facebook last night (ahd was originally from Shorpy's).

The description was " 1942. Boeing aircraft plant, Seattle. Production of
B-17 'Flying Fortress' routing wires"

I've often wondered how they made the wiring harnesses.? ?For this
particular section, metal studs are spaced for length accuracy.

[image: image.png]

73 Mark K3MSB
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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


End of Milsurplus Digest, Vol 246, Issue 23
*******************************************

______________________________________________________________
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Help: http://mailman.qth.net/mmfaq.htm
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From facility_406 at bruteforcedevelopment.com  Fri Oct 18 18:15:26 2024
From: facility_406 at bruteforcedevelopment.com (Facility 406)
Date: Fri, 18 Oct 2024 15:15:26 -0700
Subject: [Milsurplus] B-17 Wiring Harnesses
In-Reply-To: <5F5AAC55-2215-49C6-B92F-0E14063F26D2@n1k.org>
References: <CABdVoaBq8597kO86ggYuECHnZv7HLYh878Q_mCbVN5NZNPcmRg@mail.gmail.com>
	<5F5AAC55-2215-49C6-B92F-0E14063F26D2@n1k.org>
Message-ID: <f81d1905-81f9-cd21-b216-1cdf712eac0f@bruteforcedevelopment.com>

On 10/18/2024 12:02, Bob Camp wrote:
> Folks still made wiring harnesses that way well into the 1990?s. I?d bet they still do ?..

About 6 years ago I did for an engine harness.

I built a custom table, ran the wires, secured them with waxed webbing 
every 1-3", then sheathed in polyamide, fiberglass, some areas with 
friction tape, and more webbing, some gold aluminized heat shielding in 
critical areas, and some areas in a combination of all that, plus two 
layers of contra-wound spiral teflon wrap.

The critical application?

An '03 For Taurus SE.

Kurt

From aaf-radio-1 at aafradio.org  Sat Oct 19 13:37:05 2024
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Sat, 19 Oct 2024 13:37:05 -0400
Subject: [Milsurplus] ART 13 mount completed and a parts request
In-Reply-To: <321881652.1920757.1729271828249@mail.yahoo.com>
References: <17FF9A3007F43C9E.16272@groups.io>
	<CA+d3itbxOi6hsMcxGh6oJrazF6diNe1J74_njp0RqhyQBfKj-w@mail.gmail.com>
	<321881652.1920757.1729271828249@mail.yahoo.com>
Message-ID: <4180af6c-0469-4744-8770-f04f03d69108@aafradio.org>

Very nice job, Charlie!? I don't blame you a bit for making mods to the 
sketches at https://aafradio.org/garajmahal/ART-13_mounts.html .? 
Improvisation is what it's all about for us, 80 years later.

Coincidentally I was reorganizing some of my boxes-o-stuff last week, 
and ran across a pair of flat panel layouts I had forgotten that I had 
fabricated, using .063" 5052-H32 aluminum.? If anyone can use them, they 
can have them for $15 plus postage for 15oz. from 22942.
 ?(U trim & bend using the second sketch at 
https://aafradio.org/garajmahal )/ART-13_mount_fabrication_sketches.html )
 ?? 73,
- Mike? KC4TOS



On 10/18/2024 1:17 PM, CL in NC via Milsurplus wrote:
> Does anybody have an intact and nicely labeled front cover panel for 
> the ART 13 TU they are willing to part with? Does anybody know of a 
> restorer that can redo that part, paint and labels?
>
> I finished my home made mounts for the ART 13, I hope the pix make it, 
> and believe the number is MT284. There were 2 mounts I know of, one 
> that was a pan with shock mounts, MT198 I think, and one as many have, 
> a pan bolted to the bottom of the ART 13, MT283. The MT284's were 
> bolted to the aircraft and the ART 13 with its MT283 set on it and was 
> secured. Found these plans at AAFRADIO, but cheated. I had purchased a 
> few mounts of various kinds from Fair Radio years ago to be able to 
> get the hold downs and shock mounts from them for the B17 project when 
> needed. So, instead of making my own as in the plans, just retrieved a 
> couple that were the proper size. I also did not build the custom pin 
> guide for the back out of stainless. This required two parts and to be 
> secured by peening over such that it had some play in the hole it was 
> mounted in. I have a lot of 1/4 shaft bushings that simpulated that 
> just fine and were a perfect fit for the pins. The hardest part was 
> bending the .063 aluminum, neither my brake nor my sons would do it, 
> but I did get the bends started, and finished up using 3" X 1/4" thick 
> angle iron pieces to finish them up. So, I am ready now for any 
> flights or earthquakes.
>
> Charlie
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From aaf-radio-1 at aafradio.org  Sat Oct 19 17:07:21 2024
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Sat, 19 Oct 2024 17:07:21 -0400
Subject: [Milsurplus] ART 13 mount completed and a parts request
In-Reply-To: <4180af6c-0469-4744-8770-f04f03d69108@aafradio.org>
References: <17FF9A3007F43C9E.16272@groups.io>
	<CA+d3itbxOi6hsMcxGh6oJrazF6diNe1J74_njp0RqhyQBfKj-w@mail.gmail.com>
	<321881652.1920757.1729271828249@mail.yahoo.com>
	<4180af6c-0469-4744-8770-f04f03d69108@aafradio.org>
Message-ID: <e4a3975a-aea2-4c25-807e-390ec06ac7b6@aafradio.org>

I apologize for mangling the URL for the sketch.? It should be:

https://aafradio.org/garajmahal/ART-13_mount_fabrication_sketches.html

On 10/19/2024 1:37 PM, Michael Hanz wrote:
> Coincidentally I was reorganizing some of my boxes-o-stuff last week, 
> and ran across a pair of flat panel layouts I had forgotten that I had 
> fabricated, using .063" 5052-H32 aluminum.? If anyone can use them, 
> they can have them for $15 plus postage for 15oz. from 22942.
> ?(U trim & bend using the second sketch at 
> https://aafradio.org/garajmahal )/ART-13_mount_fabrication_sketches.html )
> ?? 73,
> - Mike? KC4TOS
>
>
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From w7trh at comcast.net  Sat Oct 19 16:34:50 2024
From: w7trh at comcast.net (TIM HARDY)
Date: Sat, 19 Oct 2024 13:34:50 -0700 (PDT)
Subject: [Milsurplus] Need Your Assistance
Message-ID: <321927262.805040.1729370090618@connect.xfinity.com>

Do you order from Ama zon?
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From Kargo_cult at msn.com  Sun Oct 20 21:11:30 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 21 Oct 2024 01:11:30 +0000
Subject: [Milsurplus] Ebay funnnies
Message-ID: <PH0PR20MB43742DC9CBEB42578B384B07E4432@PH0PR20MB4374.namprd20.prod.outlook.com>

I just listed a radio manual on Ebay, the manual for the WWII Canadian Wireless Set. No. 58
When i was ready to let it post, Ebay had a notification page that this item was disallowed; they were worried that certain military equipment and information
would be exported to prohibited places. By my own personal choice, i had specified only for sale in USA, Canada, or U.K.
So i changed word  "manual" to "book" and it listed with no trouble. Maybe their algorithm needs some fine-tuning.
-Hue Miller
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From RAFANTINI at salisbury.edu  Mon Oct 21 16:05:11 2024
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Mon, 21 Oct 2024 20:05:11 +0000
Subject: [Milsurplus] Davidsonville swap and auction
Message-ID: <DM8P220MB0472F8012E338EFC135A24B1B8432@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>

Went to the MAARC Antique Radio tailgate and auction in Davidsonville MD yesterday. Did try to sell a couple things but only came away with $10 did pick up a couple 51S1 receivers that I am going to look over along with an HRO-500 to check out, the owner wants like $400 or so for it, I don't want it but told the owner I would clean it up and see if it works. Did not see a lot of military stuff but a lot of other stuff. Apparently, the market for big box wooden radios is not doing well, lots of restored $100 sets. It's definitely a byers market on that stuff. Did see junk like BC-221 frequency meters and the like and know of some of the items that sold at the auction like a Racal RA-17 for $195 along with a Collins 51Q-1 receiver that s apparently a civilian version of the TCS receiver that went for $110 What I think was most interesting was a couple Heathkit Seneca transmitters that were there for free but no one took them, think the owner may have had to carry them back or disposed of them there, don't know. I thought about taking them just to remove the power transformers and chokes in the power supplies but already had a full load of junk to go back to my place.


Ray F/KA3EKH
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From kargo_cult at msn.com  Mon Oct 21 16:24:09 2024
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 21 Oct 2024 20:24:09 +0000
Subject: [Milsurplus] Ebay funnnies
Message-ID: <PH0PR20MB43741CDED93B92E13995DFA0E4432@PH0PR20MB4374.namprd20.prod.outlook.com>

Hmmm....the eBay algorithm is more nervous than i had even imagined. I recommend some anti-anxiety meds for their AI.
Hue



Sent from my Galaxy


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From Kargo_cult at msn.com  Mon Oct 21 18:21:32 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 21 Oct 2024 22:21:32 +0000
Subject: [Milsurplus] Davidsonville swap and auction
In-Reply-To: <DM8P220MB0472F8012E338EFC135A24B1B8432@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
References: <DM8P220MB0472F8012E338EFC135A24B1B8432@DM8P220MB0472.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <PH0PR20MB4374C5CC47EFF1AE8572C7F1E4432@PH0PR20MB4374.namprd20.prod.outlook.com>

>From what i see, it looks like anything "large" is decreasing in value.
-Hue Miller
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From r390a.urr at gmail.com  Mon Oct 21 18:52:37 2024
From: r390a.urr at gmail.com (Dave Merrill)
Date: Mon, 21 Oct 2024 17:52:37 -0500
Subject: [Milsurplus] Ebay funnnies
In-Reply-To: <PH0PR20MB43741CDED93B92E13995DFA0E4432@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB43741CDED93B92E13995DFA0E4432@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <CAGRTi8UXkc6rnHVTSUguEwjdykrL23X2-5XUNBUQL9jbpv-cZw@mail.gmail.com>

I've had a similar experience with 50 yo manuals. Change the wording and no
issues.

Dave N9ZC

On Mon, Oct 21, 2024, 3:24?PM Hubert Miller <kargo_cult at msn.com> wrote:

> Hmmm....the eBay algorithm is more nervous than i had even imagined. I
> recommend some anti-anxiety meds for their AI.
> Hue
>
>
>
> Sent from my Galaxy
>
>
> ______________________________________________________________
> 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 gfsmith at cox.net  Thu Oct 24 00:09:31 2024
From: gfsmith at cox.net (gfsmith)
Date: Thu, 24 Oct 2024 04:09:31 +0000 (UTC)
Subject: [Milsurplus] B-17 Wiring Harnesses
In-Reply-To: <5F5AAC55-2215-49C6-B92F-0E14063F26D2@n1k.org>
References: <CABdVoaBq8597kO86ggYuECHnZv7HLYh878Q_mCbVN5NZNPcmRg@mail.gmail.com>
	<5F5AAC55-2215-49C6-B92F-0E14063F26D2@n1k.org>
Message-ID: <750976389.3091234.1729742971493@mail.yahoo.com>

 Hi Bob. I work for a defense contractor. Wiring harnesses are still made this way even today. The only difference is that in certain applications a 3D Wiring harness board is used to run the wires. The reason is that if you take a 2D wiring harness and run it in a 3 Dimensional wiring run world, some wires will be pulled too tightly and some wires will slacken up. A good example of a 3D wiring harness was the one done for the Apollo Command Capsule, which was redone after they found massive wiring harness problems with the Block One capsules.
73, Gordon KJ6IKT

    On Friday, October 18, 2024 at 12:03:15 PM PDT, Bob Camp <kb8tq at n1k.org> wrote:  
 
 Hi

Folks still made wiring harnesses that way well into the 1990?s. I?d bet they still do ?..

Bob

> On Oct 18, 2024, at 2:49?PM, Mark K3MSB <mark.k3msb at gmail.com> wrote:
> 
> This was on Facebook last night (ahd was originally from Shorpy's).
> 
> The description was " 1942. Boeing aircraft plant, Seattle. Production of B-17 'Flying Fortress' routing wires"
> 
> I've often wondered how they made the wiring harnesses.? For this particular section, metal studs are spaced for length accuracy.? 
> 
> <image.png>
> 
> 73 Mark K3MSB
> 
> 
> ______________________________________________________________
> 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 scr274 at gmail.com  Thu Oct 24 09:43:39 2024
From: scr274 at gmail.com (Ken Kinderman)
Date: Thu, 24 Oct 2024 09:43:39 -0400
Subject: [Milsurplus] B-17 Wiring Harnesses
Message-ID: <FAB14F94-819F-4550-96F4-4B7CBB59B54B@gmail.com>

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From navy.radio at gmail.com  Fri Oct 25 14:17:26 2024
From: navy.radio at gmail.com (Nick England)
Date: Fri, 25 Oct 2024 14:17:26 -0400
Subject: [Milsurplus] Free military radio - Cincinnati - craigs list - today
	only!
Message-ID: <CAB55hNfyga-e6-Mz49XEb_JDRV5D-VUjVLrJB+3MPJXbcU=8rQ@mail.gmail.com>

 Today 10/25 only 4:30-5:30
https://cincinnati.craigslist.org/zip/d/cincinnati-free-stuff-pay-what-you-want/7796120182.html
It says "military radio and parts"
I know nothing more
Nick
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From Kargo_cult at msn.com  Sun Oct 27 18:48:47 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Sun, 27 Oct 2024 22:48:47 +0000
Subject: [Milsurplus] Advice on rust remover ?
Message-ID: <PH0PR20MB4374E00EC4113F3C82D3FD9BE4492@PH0PR20MB4374.namprd20.prod.outlook.com>

Anyone familiar with this rust remover product?
The site is
https://www.viyshop.com/funnel/heavy-duty-metal-rust-remover?utm_source=ytv&utm_medium=21753570636&utm_campaign=%E5%BC%BA%E5%8A%9B%E4%B8%8D%E9%94%88%E9%92%A2%E9%99%A4%E9%94%88%E5%89%82-funnel&utm_content=718094656267&utm_term=167331134319&gclid=Cj0KCQjwpvK4BhDUARIsADHt9sQo6xMzA2YRHDLS68J6SIRbL_lx01UWHlSiDZz8DxMXsudDFQ-ag2saAmxqEALw_wcB

The product comes from the PRC, which makes me slightly skeptical, to start with. Says no scratch.
thanks-
Hue Miller

[cid:image001.jpg at 01DB2887.B4011F30]
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From whb5k at icloud.com  Sun Oct 27 19:22:48 2024
From: whb5k at icloud.com (William Blodgett)
Date: Sun, 27 Oct 2024 18:22:48 -0500
Subject: [Milsurplus] Advice on rust remover ?
In-Reply-To: <PH0PR20MB4374E00EC4113F3C82D3FD9BE4492@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB4374E00EC4113F3C82D3FD9BE4492@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <541D67AA-5A7E-4DFA-94D9-ECE679D5CCB3@icloud.com>

Without knowledge of its chemistry I wouldn?t even consider it.  Heaven knows what the chicoms put in it.

73,
Bill
AI5RP

> On Oct 27, 2024, at 5:49?PM, Hubert Miller <Kargo_cult at msn.com> wrote:
> 
> ?
> Anyone familiar with this rust remover product?
> The site is
> https://www.viyshop.com/funnel/heavy-duty-metal-rust-remover?utm_source=ytv&utm_medium=21753570636&utm_campaign=%E5%BC%BA%E5%8A%9B%E4%B8%8D%E9%94%88%E9%92%A2%E9%99%A4%E9%94%88%E5%89%82-funnel&utm_content=718094656267&utm_term=167331134319&gclid=Cj0KCQjwpvK4BhDUARIsADHt9sQo6xMzA2YRHDLS68J6SIRbL_lx01UWHlSiDZz8DxMXsudDFQ-ag2saAmxqEALw_wcB
>  
> The product comes from the PRC, which makes me slightly skeptical, to start with. Says no scratch.
> thanks-
> Hue Miller
>  
> <image001.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 Foltarz at rocketmail.com  Sun Oct 27 20:44:19 2024
From: Foltarz at rocketmail.com (Mark Foltarz)
Date: Mon, 28 Oct 2024 00:44:19 +0000 (UTC)
Subject: [Milsurplus] Advice on rust remover ?
In-Reply-To: <PH0PR20MB4374E00EC4113F3C82D3FD9BE4492@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB4374E00EC4113F3C82D3FD9BE4492@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <1294490957.6828710.1730076260019@mail.yahoo.com>

 I use vinegar to remove rust on most tools.Hydrochloric acid on rusty files works great.
    On Sunday, October 27, 2024 at 06:49:06 PM EDT, Hubert Miller <kargo_cult at msn.com> wrote:  
 
  
Anyone familiar with this rust remover product?
 
The site is
 
https://www.viyshop.com/funnel/heavy-duty-metal-rust-remover?utm_source=ytv&utm_medium=21753570636&utm_campaign=%E5%BC%BA%E5%8A%9B%E4%B8%8D%E9%94%88%E9%92%A2%E9%99%A4%E9%94%88%E5%89%82-funnel&utm_content=718094656267&utm_term=167331134319&gclid=Cj0KCQjwpvK4BhDUARIsADHt9sQo6xMzA2YRHDLS68J6SIRbL_lx01UWHlSiDZz8DxMXsudDFQ-ag2saAmxqEALw_wcB
 
 ?
 
The product comes from the PRC, which makes me slightly skeptical, to start with. Says no scratch.
 
thanks-
 
Hue Miller
 
 ?
 

 ______________________________________________________________
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 shaun_merrigan at outlook.com  Sun Oct 27 21:06:24 2024
From: shaun_merrigan at outlook.com (Shaun Merrigan)
Date: Mon, 28 Oct 2024 01:06:24 +0000
Subject: [Milsurplus] Rust Remover
Message-ID: <SJ0P220MB06224AAA0D61B6356F534DA1DA4A2@SJ0P220MB0622.NAMP220.PROD.OUTLOOK.COM>

If you observe the "do no harm" doctrine, then Evapo-Rust is probably the best bet.  With corrosion removal on vintage parts, time is your ally, not aggressive reagents.  In my professional career, I surprised many people with what could be done over time versus "quick" aggressive removal.  Suffice to say that we needed to preserve features AND remove the corrosion products.
Shaun Merrigan
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From shaun_merrigan at outlook.com  Sun Oct 27 21:12:26 2024
From: shaun_merrigan at outlook.com (Shaun Merrigan)
Date: Mon, 28 Oct 2024 01:12:26 +0000
Subject: [Milsurplus] Advice on rust remover ?
In-Reply-To: <PH0PR20MB4374E00EC4113F3C82D3FD9BE4492@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB4374E00EC4113F3C82D3FD9BE4492@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <SJ0P220MB06226973A8530630E59BA71CDA4A2@SJ0P220MB0622.NAMP220.PROD.OUTLOOK.COM>

If you observe the "do no harm" doctrine, then Evapo-Rust is probably the best bet.  With corrosion removal on vintage parts, time is your ally, not aggressive reagents.  In my professional career, I surprised many people with what could be done over time versus "quick" aggressive removal.  Suffice to say that we needed to preserve features AND remove the corrosion products.
Shaun Merrigan


From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Hubert Miller
Sent: October 27, 2024 4:49 PM
To: nwvrs at googlegroups. com <nwvrs at googlegroups.com>; milsurplus at mailman.qth.net
Cc: psara_seattle at googlegroups.com
Subject: [Milsurplus] Advice on rust remover ?

Anyone familiar with this rust remover product?
The site is
https://www.viyshop.com/funnel/heavy-duty-metal-rust-remover?utm_source=ytv&utm_medium=21753570636&utm_campaign=%E5%BC%BA%E5%8A%9B%E4%B8%8D%E9%94%88%E9%92%A2%E9%99%A4%E9%94%88%E5%89%82-funnel&utm_content=718094656267&utm_term=167331134319&gclid=Cj0KCQjwpvK4BhDUARIsADHt9sQo6xMzA2YRHDLS68J6SIRbL_lx01UWHlSiDZz8DxMXsudDFQ-ag2saAmxqEALw_wcB

The product comes from the PRC, which makes me slightly skeptical, to start with. Says no scratch.
thanks-
Hue Miller

[cid:image001.jpg at 01DB28A4.0E73A890]
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From kgordon2006 at frontier.com  Sun Oct 27 21:56:08 2024
From: kgordon2006 at frontier.com (kgordon2006)
Date: Sun, 27 Oct 2024 18:56:08 -0700
Subject: [Milsurplus] Advice on rust remover ?
Message-ID: <127776022.489421.1730080580308@frontier.com>

I have used Evapo-Rust and really liked how well it works. I have most of a gallon jug of it left.I am still not sure how it works, though.?Ken W7EKBSent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
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From facility_406 at bruteforcedevelopment.com  Mon Oct 28 01:44:23 2024
From: facility_406 at bruteforcedevelopment.com (Facility 406)
Date: Sun, 27 Oct 2024 22:44:23 -0700
Subject: [Milsurplus] Advice on rust remover ?
In-Reply-To: <SJ0P220MB06226973A8530630E59BA71CDA4A2@SJ0P220MB0622.NAMP220.PROD.OUTLOOK.COM>
References: <PH0PR20MB4374E00EC4113F3C82D3FD9BE4492@PH0PR20MB4374.namprd20.prod.outlook.com>
	<SJ0P220MB06226973A8530630E59BA71CDA4A2@SJ0P220MB0622.NAMP220.PROD.OUTLOOK.COM>
Message-ID: <5f318f84-7faa-f485-352e-dcd87f4c8796@bruteforcedevelopment.com>

I'm more intrigued by the example of removing something from a 
left-handed stainless steel socket-head cap screw...

All that hype, and that's their example, the least likely thing to 
exist, and if it did, have a problem.

Kurt

From facility_406 at bruteforcedevelopment.com  Mon Oct 28 10:58:14 2024
From: facility_406 at bruteforcedevelopment.com (Facility 406)
Date: Mon, 28 Oct 2024 07:58:14 -0700
Subject: [Milsurplus] Advice on rust remover ?
In-Reply-To: <127776022.489421.1730080580308@frontier.com>
References: <127776022.489421.1730080580308@frontier.com>
Message-ID: <cfa24b74-5a24-2992-5b27-4403321a19fa@bruteforcedevelopment.com>

> I am still not sure how it works, though.

https://en.wikipedia.org/wiki/Phytic_acid

aka  Inositol hexaphosphoric acid

Once the active ingredient is known, there's a lot of references to it 
on the web, and common use as a rust remover in a lot of off-the-shelf 
products.

Kurt


From navy.radio at gmail.com  Mon Oct 28 11:14:07 2024
From: navy.radio at gmail.com (Nick England)
Date: Mon, 28 Oct 2024 11:14:07 -0400
Subject: [Milsurplus] TBL manual now on line.
Message-ID: <CAB55hNevbxUqpbbQBGxtZdJZNewpGVPfZwZyUm0PKuwHcn_yxw@mail.gmail.com>

NAVSHIPS 900,381 covers TBL-5, -6, -7, -12, -13 transmitters
The main manual is a 105MB pdf, due to the large size schematics and wiring
diagrams.
https://www.navy-radio.com/manuals/tbl5-900381-4502.pdf

I pulled out the detailed motor-generator construction drawings as they
come in at additional 700MB
https://www.navy-radio.com/manuals/tbl-mg-dwg.pdf

Other Navy transmitter manuals can be found at
https://www.navy-radio.com/manuals-xmtr.htm
The AN/ manuals are listed first with the WW2 era manuals listed at the
bottom
Additions and corrections are welcome!

Cheers,
Nick England K4NYW
www.navy-radio.com
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From kgordon2006 at frontier.com  Mon Oct 28 11:14:41 2024
From: kgordon2006 at frontier.com (kgordon2006)
Date: Mon, 28 Oct 2024 08:14:41 -0700
Subject: [Milsurplus] Advice on rust remover ?
In-Reply-To: <cfa24b74-5a24-2992-5b27-4403321a19fa@bruteforcedevelopment.com>
Message-ID: <1386414657.571656.1730128484983@frontier.com>

Thank you, Kurt. I have never yet looked at the ingredients in it.It does work extremely well to remove rust.? I had suspected that it was some sort of highly active detergent.Ken W7EKBSent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
-------- Original message --------From: Facility 406 <facility_406 at bruteforcedevelopment.com> Date: 10/28/24  07:58  (GMT-08:00) To: milsurplus at mailman.qth.net Subject: Re: [Milsurplus] Advice on rust remover ? > I am still not sure how it works, though.https://en.wikipedia.org/wiki/Phytic_acidaka? Inositol hexaphosphoric acidOnce the active ingredient is known, there's a lot of references to it on the web, and common use as a rust remover in a lot of off-the-shelf products.Kurt______________________________________________________________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 facility_406 at bruteforcedevelopment.com  Mon Oct 28 12:58:17 2024
From: facility_406 at bruteforcedevelopment.com (Facility 406)
Date: Mon, 28 Oct 2024 09:58:17 -0700
Subject: [Milsurplus] Advice on rust remover ?
In-Reply-To: <1386414657.571656.1730128484983@frontier.com>
References: <1386414657.571656.1730128484983@frontier.com>
Message-ID: <3ae4a55f-abf8-c395-9ede-2730048a9384@bruteforcedevelopment.com>

> It does work extremely well to remove rust.? I had suspected that it was 
> some sort of highly active detergent.

Hard to say how active it is, seems to be common in foods:

https://www.webmd.com/diet/foods-high-in-phytic-acid

But, acid is acid.  Years ago, citric acid wipes were used as safer 
anti-bacterial wipes in homes.

Machinists and technicians in the region, military, aerospace, some boys 
from CalTech, regularly talk about using white vinegar to remove rust 
from tools and equipment.

I've seen the pics, VERY impressive, but I've not tried it personally.

Pics online are all over the place, don't know if people are using old, 
or weak vinegar.  Some say use a wire brush, but the people I've spoken 
to in person, and seen pics of their projects, don't mention having to 
scrub away after the fact.

I THINK one fellow mentioned going over the item with 0000 steel wool, 
so nothing too abrasive.  In his example, it was a faceplate for an 
Atlas 618 lathe.  I saw the before and after pics, the lathe had been 
sitting for years, had a good even coating of rust, typical of a high 
humidity environment, the after pic was a nice clean satin finished 
burnished steel.

Here is a simple enough set of instructions with a pic.  Mentions 
scrubbing for more difficult rust:

https://blog.thepipingmart.com/metals/how-to-easily-remove-rust-with-vinegar/

Kurt




From w2hx at w2hx.com  Mon Oct 28 13:57:48 2024
From: w2hx at w2hx.com (W2HX)
Date: Mon, 28 Oct 2024 17:57:48 +0000
Subject: [Milsurplus] Advice on rust remover ?
In-Reply-To: <3ae4a55f-abf8-c395-9ede-2730048a9384@bruteforcedevelopment.com>
References: <1386414657.571656.1730128484983@frontier.com>
	<3ae4a55f-abf8-c395-9ede-2730048a9384@bruteforcedevelopment.com>
Message-ID: <PH0PR12MB88219809B0E79BD1AB6B0B46B54A2@PH0PR12MB8821.namprd12.prod.outlook.com>

Years ago, I used something called Naval Jelly. Worked very well on the project at hand. It was thick and was brushed on. I don't know what is in it, but it worked for me.


73 Eugene W2HX
My Youtube Channel:?https://www.youtube.com/@w2hx/videos
 

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Facility 406
Sent: Monday, October 28, 2024 12:58 PM
To: kgordon2006 <kgordon2006 at frontier.com>; milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Advice on rust remover ?

> It does work extremely well to remove rust.? I had suspected that it 
> was some sort of highly active detergent.

Hard to say how active it is, seems to be common in foods:

https://www.webmd.com/diet/foods-high-in-phytic-acid

But, acid is acid.  Years ago, citric acid wipes were used as safer anti-bacterial wipes in homes.

Machinists and technicians in the region, military, aerospace, some boys from CalTech, regularly talk about using white vinegar to remove rust from tools and equipment.

I've seen the pics, VERY impressive, but I've not tried it personally.

Pics online are all over the place, don't know if people are using old, or weak vinegar.  Some say use a wire brush, but the people I've spoken to in person, and seen pics of their projects, don't mention having to scrub away after the fact.

I THINK one fellow mentioned going over the item with 0000 steel wool, so nothing too abrasive.  In his example, it was a faceplate for an Atlas 618 lathe.  I saw the before and after pics, the lathe had been sitting for years, had a good even coating of rust, typical of a high humidity environment, the after pic was a nice clean satin finished burnished steel.

Here is a simple enough set of instructions with a pic.  Mentions scrubbing for more difficult rust:

https://blog.thepipingmart.com/metals/how-to-easily-remove-rust-with-vinegar/

Kurt



______________________________________________________________
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 Kargo_cult at msn.com  Mon Oct 28 17:15:05 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Mon, 28 Oct 2024 21:15:05 +0000
Subject: [Milsurplus] PRC-8  NIB  Rickreall OR  hamfair Oct. 2024
Message-ID: <PH0PR20MB437499C3E9F418C0A8393970E44A2@PH0PR20MB4374.namprd20.prod.outlook.com>

DIdn't ask price; i'm sure it would have been quite high; and i have no interest in owning it. Just curious how a NIB one was surplussed.
-Hue Miller
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From ark at ar88.net  Mon Oct 28 17:25:36 2024
From: ark at ar88.net (Al Klase)
Date: Mon, 28 Oct 2024 17:25:36 -0400
Subject: [Milsurplus] Advice on rust remover ?
In-Reply-To: <PH0PR12MB88219809B0E79BD1AB6B0B46B54A2@PH0PR12MB8821.namprd12.prod.outlook.com>
References: <1386414657.571656.1730128484983@frontier.com>
	<3ae4a55f-abf8-c395-9ede-2730048a9384@bruteforcedevelopment.com>
	<PH0PR12MB88219809B0E79BD1AB6B0B46B54A2@PH0PR12MB8821.namprd12.prod.outlook.com>
Message-ID: <6b6e486a-7602-419b-888a-d07ddb38bef1@ar88.net>

Eugene /et al/,

Largely phosphoric acid (Like Coke and Pepsi ?)? Always worked well for me.

AL

On 10/28/2024 1:57 PM, W2HX wrote:
> Years ago, I used something called Naval Jelly. Worked very well on the project at hand. It was thick and was brushed on. I don't know what is in it, but it worked for me.
>
>
> 73 Eugene W2HX
> My Youtube Channel:https://www.youtube.com/@w2hx/videos
>   
>
> -----Original Message-----
> From:milsurplus-bounces at mailman.qth.net  <milsurplus-bounces at mailman.qth.net>  On Behalf Of Facility 406
> Sent: Monday, October 28, 2024 12:58 PM
> To: kgordon2006<kgordon2006 at frontier.com>;milsurplus at mailman.qth.net
> Subject: Re: [Milsurplus] Advice on rust remover ?
>
>> It does work extremely well to remove rust.? I had suspected that it
>> was some sort of highly active detergent.
> Hard to say how active it is, seems to be common in foods:
>
> https://www.webmd.com/diet/foods-high-in-phytic-acid
>
> But, acid is acid.  Years ago, citric acid wipes were used as safer anti-bacterial wipes in homes.
>
> Machinists and technicians in the region, military, aerospace, some boys from CalTech, regularly talk about using white vinegar to remove rust from tools and equipment.
>
> I've seen the pics, VERY impressive, but I've not tried it personally.
>
> Pics online are all over the place, don't know if people are using old, or weak vinegar.  Some say use a wire brush, but the people I've spoken to in person, and seen pics of their projects, don't mention having to scrub away after the fact.
>
> I THINK one fellow mentioned going over the item with 0000 steel wool, so nothing too abrasive.  In his example, it was a faceplate for an Atlas 618 lathe.  I saw the before and after pics, the lathe had been sitting for years, had a good even coating of rust, typical of a high humidity environment, the after pic was a nice clean satin finished burnished steel.
>
> Here is a simple enough set of instructions with a pic.  Mentions scrubbing for more difficult rust:
>
> https://blog.thepipingmart.com/metals/how-to-easily-remove-rust-with-vinegar/
>
> Kurt
>
>
>
> ______________________________________________________________
> 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

-- 
ARK Sig Block Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/
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From smithab11 at comcast.net  Mon Oct 28 17:29:06 2024
From: smithab11 at comcast.net (B. Smith)
Date: Mon, 28 Oct 2024 17:29:06 -0400
Subject: [Milsurplus] Advice on rust remover ?
In-Reply-To: <6b6e486a-7602-419b-888a-d07ddb38bef1@ar88.net>
References: <1386414657.571656.1730128484983@frontier.com>
	<3ae4a55f-abf8-c395-9ede-2730048a9384@bruteforcedevelopment.com>
	<PH0PR12MB88219809B0E79BD1AB6B0B46B54A2@PH0PR12MB8821.namprd12.prod.outlook.com>
	<6b6e486a-7602-419b-888a-d07ddb38bef1@ar88.net>
Message-ID: <88c2e217-3b88-44fa-b38b-9b0cc9dd2886@comcast.net>

Coke or Pepsi make an excellent aircraft windshield cleaner.
Z

On 10/28/2024 5:25 PM, Al Klase wrote:
> Eugene /et al/,
>
> Largely phosphoric acid (Like Coke and Pepsi ?)? Always worked well 
> for me.
>
> AL
>
> On 10/28/2024 1:57 PM, W2HX wrote:
>> Years ago, I used something called Naval Jelly. Worked very well on the project at hand. It was thick and was brushed on. I don't know what is in it, but it worked for me.
>>
>>
>> 73 Eugene W2HX
>> My Youtube Channel:https://www.youtube.com/@w2hx/videos
>>   
>>
>> -----Original Message-----
>> From:milsurplus-bounces at mailman.qth.net  <milsurplus-bounces at mailman.qth.net>  On Behalf Of Facility 406
>> Sent: Monday, October 28, 2024 12:58 PM
>> To: kgordon2006<kgordon2006 at frontier.com>;milsurplus at mailman.qth.net
>> Subject: Re: [Milsurplus] Advice on rust remover ?
>>
>>> It does work extremely well to remove rust.? I had suspected that it
>>> was some sort of highly active detergent.
>> Hard to say how active it is, seems to be common in foods:
>>
>> https://www.webmd.com/diet/foods-high-in-phytic-acid
>>
>> But, acid is acid.  Years ago, citric acid wipes were used as safer anti-bacterial wipes in homes.
>>
>> Machinists and technicians in the region, military, aerospace, some boys from CalTech, regularly talk about using white vinegar to remove rust from tools and equipment.
>>
>> I've seen the pics, VERY impressive, but I've not tried it personally.
>>
>> Pics online are all over the place, don't know if people are using old, or weak vinegar.  Some say use a wire brush, but the people I've spoken to in person, and seen pics of their projects, don't mention having to scrub away after the fact.
>>
>> I THINK one fellow mentioned going over the item with 0000 steel wool, so nothing too abrasive.  In his example, it was a faceplate for an Atlas 618 lathe.  I saw the before and after pics, the lathe had been sitting for years, had a good even coating of rust, typical of a high humidity environment, the after pic was a nice clean satin finished burnished steel.
>>
>> Here is a simple enough set of instructions with a pic.  Mentions scrubbing for more difficult rust:
>>
>> https://blog.thepipingmart.com/metals/how-to-easily-remove-rust-with-vinegar/
>>
>> Kurt
>>
>>
>>
>> ______________________________________________________________
>> 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
>
> -- 
> ARK Sig Block Al Klase - N3FRQ
> Jersey City, NJ
> http://www.skywaves.ar88.net/
>
> ______________________________________________________________
> 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 sbjohnston at aol.com  Mon Oct 28 17:53:46 2024
From: sbjohnston at aol.com (sbjohnston at aol.com)
Date: Mon, 28 Oct 2024 21:53:46 +0000 (UTC)
Subject: [Milsurplus] Advice on rust remover
In-Reply-To: <mailman.1615.1730150115.21013.milsurplus@mailman.qth.net>
References: <mailman.1615.1730150115.21013.milsurplus@mailman.qth.net>
Message-ID: <1678499016.7259893.1730152427556@mail.yahoo.com>

Several people have told me they use citric acid (purchased as a powder and dissolved in water) to remove rust.? These restorations involve tools and parts being soaked in the citric acid solution for some hours (overnight perhaps).??
The photo and video results have looked quite good.? I imagine the odor is low or pleasant and the toxicity is nil.?? Cost seems low too:
https://www.amazon.com/s?k=citric+acid+powder
https://www.youtube.com/results?search_query=citric+acid+rust

Steve WD8DAS?? 

sbjohnston at aol.com?? 
http://www.wd8das.net/?? http://af4k-crystals.com/?? 

--------------------------------------------------------------------?? 
Radio is your best entertainment value.?? 
--------------------------------------------------------------------?? 

Mein Ohr ganz nah am Weltempf?nger...
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From glennmaillist at bellsouth.net  Mon Oct 28 21:27:23 2024
From: glennmaillist at bellsouth.net (Glenn Little WB4UIV)
Date: Mon, 28 Oct 2024 21:27:23 -0400
Subject: [Milsurplus] Advice on rust remover
In-Reply-To: <1678499016.7259893.1730152427556@mail.yahoo.com>
References: <mailman.1615.1730150115.21013.milsurplus@mailman.qth.net>
	<1678499016.7259893.1730152427556@mail.yahoo.com>
Message-ID: <ed52c349-403b-4eac-a87d-338f0a538ff0@bellsouth.net>

Any acid will remove more than rust.
Evap-o-rust will only remove iron oxide, it will not attack the steel 
below the rust and it is non toxic.
It will remove gun blueing as it is an oxide.
I have used a lot of it and it works very well.
If you soak a rusted toll in it you will probably wind up with black 
residue that washes off.
This is the carbon that was in the rust.
This is a solution that falls into the too good to be true category.

Glenn
WB4UIV

On 10/28/2024 5:53 PM, sbjohnston--- via Milsurplus wrote:
> Several people have told me they use citric acid (purchased as a 
> powder and dissolved in water) to remove rust.? These restorations 
> involve tools and parts being soaked in the citric acid solution for 
> some hours (overnight perhaps).
>
> The photo and video results have looked quite good.? I imagine the 
> odor is low or pleasant and the toxicity is nil.?? Cost seems low too:
>
> https://www.amazon.com/s?k=citric+acid+powder
>
> https://www.youtube.com/results?search_query=citric+acid+rust
>
>
> Steve WD8DAS
>
> sbjohnston at aol.com
> http://www.wd8das.net/
> http://af4k-crystals.com/
>
> --------------------------------------------------------------------
> Radio is your best entertainment value.
> --------------------------------------------------------------------
>
>
> Mein Ohr ganz nah am Weltempf?nger...
>
>
> ______________________________________________________________
> 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

-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIVwb4uiv at arrl.net     AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
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From whb5k at icloud.com  Mon Oct 28 21:47:28 2024
From: whb5k at icloud.com (Bill Blodgett)
Date: Mon, 28 Oct 2024 20:47:28 -0500
Subject: [Milsurplus] Advice on rust remover
In-Reply-To: <ed52c349-403b-4eac-a87d-338f0a538ff0@bellsouth.net>
References: <mailman.1615.1730150115.21013.milsurplus@mailman.qth.net>
	<1678499016.7259893.1730152427556@mail.yahoo.com>
	<ed52c349-403b-4eac-a87d-338f0a538ff0@bellsouth.net>
Message-ID: <C71A3D1A-2420-465D-9699-967C8E9F2579@icloud.com>

I second Glenn?s recommendation and description.  Evapo-Rust is proven, using a compound of phosphoric acid, the chemical used in industry to remove oxidation from steel and prep it for coating(s).

73s,

Bill
AI5RP / KJ5BNE/AE
- - - - - - - - - - - - - - - - - - - - - - 
Bill Blodgett
Arlington, Texas


> On Oct 28, 2024, at 8:27?PM, Glenn Little WB4UIV <glennmaillist at bellsouth.net> wrote:
> 
> Any acid will remove more than rust.
> Evapo-o-Rust will only remove iron oxide, it will not attack the steel below the rust and it is non toxic.
> It will remove gun blueing as it is an oxide.
> I have used a lot of it and it works very well.
> If you soak a rusted toll in it you will probably wind up with black residue that washes off.
> This is the carbon that was in the rust.
> This is a solution that falls into the too good to be true category.
> 
> Glenn
> WB4UIV
> 
> On 10/28/2024 5:53 PM, sbjohnston--- via Milsurplus wrote:
>> Several people have told me they use citric acid (purchased as a powder and dissolved in water) to remove rust.  These restorations involve tools and parts being soaked in the citric acid solution for some hours (overnight perhaps).  
>> 
>> The photo and video results have looked quite good.  I imagine the odor is low or pleasant and the toxicity is nil.   Cost seems low too:
>> 
>> https://www.amazon.com/s?k=citric+acid+powder
>> 
>> https://www.youtube.com/results?search_query=citric+acid+rust
>> 
>> 
>> Steve WD8DAS  
>> 
>> sbjohnston at aol.com <mailto:sbjohnston at aol.com>  
>> http://www.wd8das.net/  
>> http://af4k-crystals.com <http://af4k-crystals.com/>/  
>> 
>> --------------------------------------------------------------------  
>> Radio is your best entertainment value.  
>> --------------------------------------------------------------------  
>> 
>> 
>> Mein Ohr ganz nah am Weltempf?nger...
>> 
>> 
>> 
>> ______________________________________________________________
>> 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 <http://www.qsl.net/>
>> Please help support this email list: http://www.qsl.net/donate.html
> 
> -- 
> -----------------------------------------------------------------------
> Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
> Amateur Callsign:  WB4UIV            wb4uiv at arrl.net <mailto:wb4uiv at arrl.net>    AMSAT LM 2178
> QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
> "It is not the class of license that the Amateur holds but the class
> of the Amateur that holds the license"
> ______________________________________________________________
> 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  Tue Oct 29 13:12:14 2024
From: mjcal77 at yahoo.com (CL in NC)
Date: Tue, 29 Oct 2024 17:12:14 +0000 (UTC)
Subject: [Milsurplus] TCS dynamotor supply
References: <2083373989.4182739.1730221934158.ref@mail.yahoo.com>
Message-ID: <2083373989.4182739.1730221934158@mail.yahoo.com>

I have a friend down in Warner Robbins, GA that is looking for the dual dynamotor supply for the TCS.  Anybody have one they might consider selling?

Charlie, W4MEC in NC

From Kargo_cult at msn.com  Tue Oct 29 18:18:18 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Tue, 29 Oct 2024 22:18:18 +0000
Subject: [Milsurplus] Unknown cable and connector GK-9-23 1/2" AC-AN  ??
Message-ID: <PH0PR20MB4374370BBC87E26C143671B9E44B2@PH0PR20MB4374.namprd20.prod.outlook.com>

What is this cable, please?
2 identical F connectors,     GK-9-23 ?" AC-AN
I don't recognize it.
If it doesn't go with anything i have, it will be available free for postage.
-Hue Miller
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From arc5 at ix.netcom.com  Tue Oct 29 19:05:25 2024
From: arc5 at ix.netcom.com (David Stinson)
Date: Tue, 29 Oct 2024 18:05:25 -0500
Subject: [Milsurplus] Unknown cable and connector GK-9-23 1/2" AC-AN ??
In-Reply-To: <PH0PR20MB4374370BBC87E26C143671B9E44B2@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB4374370BBC87E26C143671B9E44B2@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <56e646cb-b510-4041-80b0-dd24393dc7c6@ix.netcom.com>

I believe that is the cable to connect
the TCS Remote Control to the TCS
dynamotor power supply.

On 10/29/2024 5:18 PM, Hubert Miller wrote:
>
> What is this cable, please?
>
> 2 identical F connectors, ?GK-9-23 ?? AC-AN
>
> I don?t recognize it.
> If it doesn?t go with anything i have, it will be available free for 
> postage.
>
> -Hue Miller
>
>
> ______________________________________________________________
> 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  Tue Oct 29 20:10:03 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Wed, 30 Oct 2024 00:10:03 +0000
Subject: [Milsurplus] AI to the rescue
Message-ID: <PH0PR20MB4374174F9A20C2A18CE06863E4542@PH0PR20MB4374.namprd20.prod.outlook.com>

If you have something to sell on Ebay, and you don't know the first thing about it, what can you do?
Why, just have AI write your description !
No need for any actual facts ! Thank God for AI !
-Hue Miller

"This is a vintage amateur radio transmitter and receiver designed for ham radio communication. It is a classic piece of equipment that is highly sought after by collectors and enthusiasts. The device is capable of transmitting and receiving signals on the ham radio frequency, making it an essential tool for amateur radio operators. The product is a great addition to any collection or for use in amateur radio communication."
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From ersmar at verizon.net  Tue Oct 29 23:20:45 2024
From: ersmar at verizon.net (Gene Smar)
Date: Wed, 30 Oct 2024 03:20:45 +0000 (UTC)
Subject: [Milsurplus] AI to the rescue
In-Reply-To: <PH0PR20MB4374174F9A20C2A18CE06863E4542@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB4374174F9A20C2A18CE06863E4542@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <3939714.2818316.1730258445269@mail.yahoo.com>

Makes me wanna get one, whatever it is.

73 de?Gene Smar AD3F?

Sent from my Radio Shack TRS-80 model 100 laptop 
 
  On Tue, Oct 29, 2024 at 8:10 PM, Hubert Miller<Kargo_cult at msn.com> wrote:    
If you have something to sell on Ebay, and you don?t know the first thing about it, what can you do?
 
Why, just have AI write your description !
 
No need for any actual facts ! Thank God for AI !
 
-Hue Miller
 
 ?
 
?This is a vintage amateur radio transmitter and receiver designed for ham radio communication. It is a classic piece of equipment that is highly sought after by collectors and enthusiasts. The device is capable of transmitting and receiving signals on the ham radio frequency, making it an essential tool for amateur radio operators. The product is a great addition to any collection or for use in amateur radio communication.?
 ______________________________________________________________
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  Wed Oct 30 02:59:53 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Wed, 30 Oct 2024 06:59:53 +0000
Subject: [Milsurplus] German People's Radio image on Youtube
Message-ID: <PH0PR20MB4374417B79E76C58A245CDDDE4542@PH0PR20MB4374.namprd20.prod.outlook.com>

I happened to be wasting time on a Youtube video, "Raus aus den Tr?mmern - Vom Beginn des Wiederaufbaus in Berlin 1945"
( Up from the ruins - from the beginning of the rebuilding of Berlin 1945 ) at 00:31:46 of an 11 minute colorized film,
https://www.youtube.com/watch?v=GKJ_PPg9aVE
It's a VE301 People's Radio, being traded at an official "Tauschzentrale", an office for trading things you don't really need for things 
you do want, clothes, blankets, whatever. 
This is a 3 tube regenerative radio for LW and MW bands. 
I was never in Berlin. But i recall still in the mid-1950s, a decade after the big storm, the Stuttgart radio still had a program of 
announcements each day of people looking for lost or relocated relatives, or any information on them. 
-Hue Miller

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From arc5 at ix.netcom.com  Wed Oct 30 06:02:40 2024
From: arc5 at ix.netcom.com (David Stinson)
Date: Wed, 30 Oct 2024 05:02:40 -0500
Subject: [Milsurplus] AI to the rescue
In-Reply-To: <PH0PR20MB4374174F9A20C2A18CE06863E4542@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB4374174F9A20C2A18CE06863E4542@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <aa03ccd2-d5fa-4ff0-8d88-44726d3a0859@ix.netcom.com>



On 10/29/2024 7:10 PM, Hubert Miller wrote:
>
> If you have something to sell on Ebay, and you don?t know the first 
> thing about it, what can you do?
>
> Why, just have AI write your description !
>
> No need for any actual facts ! Thank God for AI !
>
> LOL!? Can't wait to watch the AI investment hysteria balloon pop
> and all that hot air "fade to the fundimentals."
> 73 Dave S.
>
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From arc5 at ix.netcom.com  Wed Oct 30 06:07:29 2024
From: arc5 at ix.netcom.com (David Stinson)
Date: Wed, 30 Oct 2024 05:07:29 -0500
Subject: [Milsurplus] Unknown cable and connector GK-9-23 1/2" AC-AN ??
In-Reply-To: <PH0PR20MB4374370BBC87E26C143671B9E44B2@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB4374370BBC87E26C143671B9E44B2@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <6cdf0c19-0fdf-421e-b514-1312b792337d@ix.netcom.com>

The connectors are those which connect the
TCS dynamotor supply to the TCS remote control box.
73 DE Dave AB5S

On 10/29/2024 5:18 PM, Hubert Miller wrote:
>
> What is this cable, please?
>
> 2 identical F connectors, ?GK-9-23 ?? AC-AN
>
> I don?t recognize it.
> If it doesn?t go with anything i have, it will be available free for 
> postage.
>
> -Hue Miller
>
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From w2hx at w2hx.com  Wed Oct 30 14:58:06 2024
From: w2hx at w2hx.com (W2HX)
Date: Wed, 30 Oct 2024 18:58:06 +0000
Subject: [Milsurplus] TCS dynamotor supply
In-Reply-To: <2083373989.4182739.1730221934158@mail.yahoo.com>
References: <2083373989.4182739.1730221934158.ref@mail.yahoo.com>
	<2083373989.4182739.1730221934158@mail.yahoo.com>
Message-ID: <PH0PR12MB88216F7732CECF400D4E545CB5542@PH0PR12MB8821.namprd12.prod.outlook.com>

Is there any benefit of one DM vs dual DMs on the TCS supply? Was one of them an "improvement" over the other?


73 Eugene W2HX
My Youtube Channel:?https://www.youtube.com/@w2hx/videos
 

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of CL in NC via Milsurplus
Sent: Tuesday, October 29, 2024 1:12 PM
To: Milsurplus <milsurplus at mailman.qth.net>
Subject: [Milsurplus] TCS dynamotor supply

I have a friend down in Warner Robbins, GA that is looking for the dual dynamotor supply for the TCS.  Anybody have one they might consider selling?

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 Kargo_cult at msn.com  Wed Oct 30 17:15:04 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Wed, 30 Oct 2024 21:15:04 +0000
Subject: [Milsurplus] SCR-288  ( BC-474 )  Change 1, May 1944
Message-ID: <PH0PR20MB43741882B0C179A195010153E4542@PH0PR20MB4374.namprd20.prod.outlook.com>

I didn't know this Change page existed until this year, altho i owned BC-474's going back to 1985.
None of the online SCR-288 manual copies seem to include this Change.
Back then, i solved the "audio oscillation" phenomenon by putting a "damper" resistor across the output transformer.
That does work, and my even be a better solution, in case you don't have this tube shield, but here is the original
U.S. Army solution. I note the withdrawal of "RESTRICTED" status is May 1944. Was this the date of inception of the
SCR-694 ?
'Change 1' included here for your archives.
-Hue Miller
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From Kargo_cult at msn.com  Wed Oct 30 17:16:28 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Wed, 30 Oct 2024 21:16:28 +0000
Subject: [Milsurplus] SCR-288  ( BC-474 )  Change 1, May 1944
In-Reply-To: <PH0PR20MB43741882B0C179A195010153E4542@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB43741882B0C179A195010153E4542@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <PH0PR20MB4374AAB62912EC3823ECC32AE4542@PH0PR20MB4374.namprd20.prod.outlook.com>

Let's try that again.
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From Kargo_cult at msn.com  Wed Oct 30 19:22:04 2024
From: Kargo_cult at msn.com (Hubert Miller)
Date: Wed, 30 Oct 2024 23:22:04 +0000
Subject: [Milsurplus] TCS dynamotor supply
In-Reply-To: <PH0PR12MB88216F7732CECF400D4E545CB5542@PH0PR12MB8821.namprd12.prod.outlook.com>
References: <2083373989.4182739.1730221934158.ref@mail.yahoo.com>
	<2083373989.4182739.1730221934158@mail.yahoo.com>
	<PH0PR12MB88216F7732CECF400D4E545CB5542@PH0PR12MB8821.namprd12.prod.outlook.com>
Message-ID: <PH0PR20MB43741CABA6ED612F752677A2E4542@PH0PR20MB4374.namprd20.prod.outlook.com>

I had to mention this. The TCS-5 was intended for land vehicles use and has wider selectivity. Info from TCS-5 manual.

Also the short cable i wrote about earlier, cable from PS to control box, i will mail that on request, only cost will be postage
rounded up to next dollar. Estimate about $5. 

If interested, mail qth with reply. Read previous sentence again. 
-Hue Miller 

From ark at ar88.net  Wed Oct 30 20:09:20 2024
From: ark at ar88.net (Al Klase)
Date: Wed, 30 Oct 2024 20:09:20 -0400
Subject: [Milsurplus] SCR-288 ( BC-474 ) Change 1, May 1944
In-Reply-To: <PH0PR20MB4374AAB62912EC3823ECC32AE4542@PH0PR20MB4374.namprd20.prod.outlook.com>
References: <PH0PR20MB43741882B0C179A195010153E4542@PH0PR20MB4374.namprd20.prod.outlook.com>
	<PH0PR20MB4374AAB62912EC3823ECC32AE4542@PH0PR20MB4374.namprd20.prod.outlook.com>
Message-ID: <f2e4f50b-fd27-426f-9bca-efe5173bf01b@ar88.net>

Thanks Hue,

SCR-288 is one of my favorite radios.
See my webpage: http://www.skywaves.ar88.net/mil/SCR-288/SCR-288.html

VY 73,
AL


On 10/30/2024 5:16 PM, Hubert Miller wrote:
>
> Let?s try that again.
>
>
> ______________________________________________________________
> 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

-- 
ARK Sig Block Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/
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From arc5 at ix.netcom.com  Thu Oct 31 06:27:48 2024
From: arc5 at ix.netcom.com (David Stinson)
Date: Thu, 31 Oct 2024 05:27:48 -0500
Subject: [Milsurplus] SCR-288 ( BC-474 ) Change 1, May 1944
In-Reply-To: <f2e4f50b-fd27-426f-9bca-efe5173bf01b@ar88.net>
References: <PH0PR20MB43741882B0C179A195010153E4542@PH0PR20MB4374.namprd20.prod.outlook.com>
	<PH0PR20MB4374AAB62912EC3823ECC32AE4542@PH0PR20MB4374.namprd20.prod.outlook.com>
	<f2e4f50b-fd27-426f-9bca-efe5173bf01b@ar88.net>
Message-ID: <d28e479a-7bfb-4806-8ac6-9d228aa6127f@ix.netcom.com>

A tip to all who might want to tackle SCR-288:
There is an electrolytic cap on the B+
buss, originally there to smooth-out
the generator voltage.? It charges and
when you switch to "Transmit," it
discharges through the T/R switch
contact to the TX B+ buss.? This
causes a spark that will eventually
eat-up the T/R switch contact.
Just disconnecting this cap isn't
a complete solution, since the output
cap on the usually-built power supply
can do the same thing if it's large.
Years ago, there were some suggested
solutions to this design flaw.? Any of
those worthy folks still here to comment?
IIRC, I put an output choke in my supply
which stopped this sparking.? Been a lot
of years.? I should break mine back out.
I have the genny, the original antenna and
counterpoise, etc.? The only thing I lack
is the cases/canvas, which are likely extinct.

GL OM DE Dave AB5S


On 10/30/2024 7:09 PM, Al Klase wrote:
> Thanks Hue,
>
> SCR-288 is one of my favorite radios.
> See my webpage: http://www.skywaves.ar88.net/mil/SCR-288/SCR-288.html
>
> VY 73,
> AL
>
>
> On 10/30/2024 5:16 PM, Hubert Miller wrote:
>>
>> Let?s try that again.
>>
>>
>> ______________________________________________________________
>> 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
>
> -- 
> ARK Sig Block Al Klase - N3FRQ
> Jersey City, NJ
> http://www.skywaves.ar88.net/
>
> ______________________________________________________________
> 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 31 13:29:27 2024
From: kargo_cult at msn.com (Hubert Miller)
Date: Thu, 31 Oct 2024 17:29:27 +0000
Subject: [Milsurplus] SCR-288 ( BC-474 ) Change 1, May 1944
Message-ID: <PH0PR20MB437474A4819DE09CB7DE1763E4552@PH0PR20MB4374.namprd20.prod.outlook.com>

Dave, i thought you just moved the cap from from switch contact to switch pole, so it didn't recharge every time you went to transmit. That isn't enuff ? My brother up in WA is selling off some of my stuff and will soon have a BC-474 with 2 pieces of canvas, the radio bag and one smaller bag, i think for the gen itself. The latter bag has a story: i spotted it in a surplus store in 1976 and thought "Hmm...that ought to belong to something of interest". I only figured out last year it was SCR-288. The unobtainium radio bag itself, was unfortunately very moldy and my brother washed it in, i think, with Boraxo, if i'm not mistaken, which kills the mold but doesn't leave you with a linen white canvas. Unfortunately the bag fasten straps are leather of a wimpy narrow Boy Scout summer camp style, wimpy in the same fashion the cabinet hardware for the Swedish Set is, and the leather straps disintegrated. I told him to retain the pieces so the next owner can have these made by some leather craftsperson. My guess is the bag was a nice size and format for hiking and that's where they went. Then when the wimpy straps broke apart and the bag got dirty, end of story for the bag. I bought the set off Ebay about 2 decades ago and the proceedings still make me wonder. Seller informed me he had the gen also in bags but it sold to another, while i saw no hair nor hide of that listing. My impression was, kind of flakey  but so be it. I paid good money for it; as you can imagine, there was competition for it  as it seems a lot of people like this bite-size, Boy Sprouts - like toy radio.
I still have one pretty nice BC-474 here in Oregon and then my brother has the more complete one, pretty nice he sez, up in WA. Oh, i forgot that nice and intriguing "suitcase conversion" BC-474 i picked up this summer, which photo i posted here recently.
IF the set covered 40 without alignment trick i would be in love with it, but 80 band just does not interest me. So that means my interest in  WW2 "combat tactical" equipment, that is, <6 MHz, has ebbed in favor of skywave equipment.
-Hue Miller



Sent from my Galaxy


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