From sestokes at sonic.net  Sat Feb  2 13:23:16 2019
From: sestokes at sonic.net (Hole in the Head Press)
Date: Sat, 2 Feb 2019 10:23:16 -0800
Subject: [Milsurplus] Equipment Identification
Message-ID: <b7d05431-7177-2eac-4317-a5a995cb11f7@sonic.net>

Probably an easy answer, but what is the transmitter sitting on top of 
the Power Panel?

Thanks

-- 
Sam Stokes, Publisher, KG6WYZ
3rd Edition of Rings of Supersonic Steel
The Last Missile Site
Fort Baker Through the Years
http://www.holeintheheadpress.com

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From arc5 at ix.netcom.com  Sat Feb  2 14:42:07 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Sat, 2 Feb 2019 13:42:07 -0600
Subject: [Milsurplus] Equipment Identification
In-Reply-To: <b7d05431-7177-2eac-4317-a5a995cb11f7@sonic.net>
References: <b7d05431-7177-2eac-4317-a5a995cb11f7@sonic.net>
Message-ID: <000f01d4bb2f$62199dd0$264cd970$@netcom.com>

BC-AA-191, ancestor of the BC-191 and BC-375.
Small box to the right is the accessory antenna tuner
which was incorporated into the later sets.

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Hole in the Head Press
Sent: Saturday, February 02, 2019 12:23 PM
To: Milsurplus at mailman.qth.net
Subject: [Milsurplus] Equipment Identification

Probably an easy answer, but what is the transmitter sitting on top of the Power Panel?

Thanks

--
Sam Stokes, Publisher, KG6WYZ
3rd Edition of Rings of Supersonic Steel The Last Missile Site Fort Baker Through the Years http://www.holeintheheadpress.com



From sestokes at sonic.net  Sat Feb  2 14:44:49 2019
From: sestokes at sonic.net (Hole in the Head Press)
Date: Sat, 2 Feb 2019 11:44:49 -0800
Subject: [Milsurplus] Equipment Identification
In-Reply-To: <000f01d4bb2f$62199dd0$264cd970$@netcom.com>
References: <b7d05431-7177-2eac-4317-a5a995cb11f7@sonic.net>
	<000f01d4bb2f$62199dd0$264cd970$@netcom.com>
Message-ID: <78930368-b5e8-2993-07f7-1db5aab2482e@sonic.net>

Ah Ha... thought it looked like a baby BC-191/375..... Thanks a lot.

Sam Stokes, Publisher, KG6WYZ
3rd Edition of Rings of Supersonic Steel
The Last Missile Site
Fort Baker Through the Years
http://www.holeintheheadpress.com

On 2/2/2019 11:42 AM, David Stinson wrote:
> BC-AA-191, ancestor of the BC-191 and BC-375.
> Small box to the right is the accessory antenna tuner
> which was incorporated into the later sets.
>
> -----Original Message-----
> From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Hole in the Head Press
> Sent: Saturday, February 02, 2019 12:23 PM
> To: Milsurplus at mailman.qth.net
> Subject: [Milsurplus] Equipment Identification
>
> Probably an easy answer, but what is the transmitter sitting on top of the Power Panel?
>
> Thanks
>
> --
> Sam Stokes, Publisher, KG6WYZ
> 3rd Edition of Rings of Supersonic Steel The Last Missile Site Fort Baker Through the Years http://www.holeintheheadpress.com
>
>
>

From aaf-radio-1 at aafradio.org  Sat Feb  2 14:45:32 2019
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Sat, 2 Feb 2019 14:45:32 -0500
Subject: [Milsurplus] Equipment Identification
In-Reply-To: <b7d05431-7177-2eac-4317-a5a995cb11f7@sonic.net>
References: <b7d05431-7177-2eac-4317-a5a995cb11f7@sonic.net>
Message-ID: <4ab9f8bb-299c-172d-3c90-62dfbcff70b5@aafradio.org>

BC-AA-191 - http://aafradio.org/garajmahal/BC-AA-191.htm

-? Michael Hanz - KC4TOS

On 2/2/2019 1:23 PM, Hole in the Head Press wrote:
> Probably an easy answer, but what is the transmitter sitting on top of 
> the Power Panel?



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From mmab at cox.net  Sun Feb  3 15:16:13 2019
From: mmab at cox.net (Michael Bittner)
Date: Sun, 3 Feb 2019 12:16:13 -0800
Subject: [Milsurplus] Equipment Identification
References: <b7d05431-7177-2eac-4317-a5a995cb11f7@sonic.net>
	<000f01d4bb2f$62199dd0$264cd970$@netcom.com>
Message-ID: <4581A3A0F9774200B66C321EC7CE3906@miked62f059f40>

Is there a Mil Spec for the Reference Designators of the Hardware Items in 
electronic equipment such as knobs, dials, gears, pulleys, springs, shields, 
windows, bezels, grills, etc.?

Reference designators for items such as resistors, capacitors, tubes, etc. 
come up quickly on Google, and I assume the disignator for common items such 
as nuts, bolts, washers, spacers, etc. is the letter H, but I haven't had 
any luck with the other hardware items mentioned above.  Help anyone?

Mike, W6MAB 


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


From glennmaillist at bellsouth.net  Sat Feb  2 23:20:31 2019
From: glennmaillist at bellsouth.net (Glenn Little WB4UIV)
Date: Sat, 2 Feb 2019 23:20:31 -0500
Subject: [Milsurplus] Equipment Identification
In-Reply-To: <4581A3A0F9774200B66C321EC7CE3906@miked62f059f40>
References: <b7d05431-7177-2eac-4317-a5a995cb11f7@sonic.net>
	<000f01d4bb2f$62199dd0$264cd970$@netcom.com>
	<4581A3A0F9774200B66C321EC7CE3906@miked62f059f40>
Message-ID: <bcb39120-37c8-cb0d-7f02-af531346d254@bellsouth.net>

Most mechanical parts I have seen are listed as reference designator MP.

Glenn

On 2/3/2019 3:16 PM, Michael Bittner wrote:
> Is there a Mil Spec for the Reference Designators of the Hardware 
> Items in electronic equipment such as knobs, dials, gears, pulleys, 
> springs, shields, windows, bezels, grills, etc.?
>
> Reference designators for items such as resistors, capacitors, tubes, 
> etc. come up quickly on Google, and I assume the disignator for common 
> items such as nuts, bolts, washers, spacers, etc. is the letter H, but 
> I haven't had any luck with the other hardware items mentioned above.? 
> Help anyone?
>
> Mike, W6MAB
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
> ______________________________________________________________
> 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:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"


From sestokes at sonic.net  Sun Feb  3 00:19:14 2019
From: sestokes at sonic.net (Hole in the Head Press)
Date: Sat, 2 Feb 2019 21:19:14 -0800
Subject: [Milsurplus] Equipment Identification
In-Reply-To: <4581A3A0F9774200B66C321EC7CE3906@miked62f059f40>
References: <b7d05431-7177-2eac-4317-a5a995cb11f7@sonic.net>
	<000f01d4bb2f$62199dd0$264cd970$@netcom.com>
	<4581A3A0F9774200B66C321EC7CE3906@miked62f059f40>
Message-ID: <4f720612-3628-a5d1-7cb4-db46abb46af2@sonic.net>

The designations have changed over the years, and the Army used one 
scheme, the Navy another.

Here's an old Signal Corps Equipment Storage Catalog with some of the 
info you are seeking.

https://archive.org/details/StorageCatalogueSignalCorps/page/n5

Sam Stokes, Publisher, KG6WYZ
3rd Edition of Rings of Supersonic Steel
The Last Missile Site
Fort Baker Through the Years
http://www.holeintheheadpress.com

On 2/3/2019 12:16 PM, Michael Bittner wrote:
> Is there a Mil Spec for the Reference Designators of the Hardware 
> Items in electronic equipment such as knobs, dials, gears, pulleys, 
> springs, shields, windows, bezels, grills, etc.?
>
> Reference designators for items such as resistors, capacitors, tubes, 
> etc. come up quickly on Google, and I assume the disignator for common 
> items such as nuts, bolts, washers, spacers, etc. is the letter H, but 
> I haven't had any luck with the other hardware items mentioned above.? 
> Help anyone?
>
> Mike, W6MAB
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
> ______________________________________________________________
> 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 arc5 at ix.netcom.com  Sun Feb  3 08:39:02 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 3 Feb 2019 07:39:02 -0600
Subject: [Milsurplus] Seeking TCS Unubtainium
Message-ID: <001101d4bbc5$d3b14ab0$7b13e010$@netcom.com>

Any chance someone out there has a stocked TCS
Spares
box or a parts set with R-216, the RF Gain pot?  
It's a custom pot with the switch position 
at the full clockwise position, rather than the
usual
and common pot with the switch at the
counter-clockwise
end.  I refuse to drill a hole and mount an
external
AVC switch.  This poor TCS-6, all apart and almost
everything else ready to go, will have to sit in a

box on the shelf for now.  Won't you take pity
on the poor beast? ;-)

TNX OM ES 73 DE Dave AB5S



From w2hx at w2hx.com  Sun Feb  3 17:57:45 2019
From: w2hx at w2hx.com (W2HX)
Date: Sun, 3 Feb 2019 22:57:45 +0000
Subject: [Milsurplus] Equipment Identification
In-Reply-To: <4ab9f8bb-299c-172d-3c90-62dfbcff70b5@aafradio.org>
References: <b7d05431-7177-2eac-4317-a5a995cb11f7@sonic.net>
	<4ab9f8bb-299c-172d-3c90-62dfbcff70b5@aafradio.org>
Message-ID: <95b900865c604460a15010d35bbb7da0@EXBE015SV3.NA02.MSEXCHANGEOUTLOOK.COM>

What?s the big unit(s) its sitting on?


73 Eugene W2HX

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Michael Hanz
Sent: Saturday, February 02, 2019 2:46 PM
To: Hole in the Head Press; Milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Equipment Identification

BC-AA-191 - http://aafradio.org/garajmahal/BC-AA-191.htm

-  Michael Hanz - KC4TOS
On 2/2/2019 1:23 PM, Hole in the Head Press wrote:
Probably an easy answer, but what is the transmitter sitting on top of the Power Panel?

[cid:image001.jpg at 01D4BBE9.F5B6D0C0]




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From arc5 at ix.netcom.com  Sun Feb  3 21:57:08 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Sun, 3 Feb 2019 20:57:08 -0600
Subject: [Milsurplus] Better Safer
Message-ID: <001601d4bc35$51993270$f4cb9750$@netcom.com>


Test that BFO before re-installing it.

GL OM ES 73 DE Dave AB5S

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From jphutch60bj at gmail.com  Mon Feb  4 22:26:17 2019
From: jphutch60bj at gmail.com (John Hutchins)
Date: Mon, 4 Feb 2019 21:26:17 -0600
Subject: [Milsurplus] BC-348 - Power Supply
Message-ID: <e7995a36-845a-e48f-728f-839decc151e0@gmail.com>

Have made several power supply versions for my BC-348R. ? I am close to 
what I want.? BUT, big? BUT,? I have a heat issue. Outside in free air 
the power supply stays on target +/- 2V.?? All buttoned up inside the 
BC-348, voltage drops slowly from 225V- to - 190 V? G.T > 1.5? hrs time 
and falling.? Stuck a wire thermal probe into the unit, temperature 
~37-39 C? 102F.? I am not surprised the voltage dropped, but had no Idea 
it would be > 10 %.? Any ideas/Suggestions on how to wrangle this issue 
please contact me "off" the list. ? I have a pic, windows .BMP file of 
the schematic.

Thanks

jphutch


From antqradio at sbcglobal.net  Mon Feb  4 23:38:33 2019
From: antqradio at sbcglobal.net (Jim Whartenby)
Date: Tue, 5 Feb 2019 04:38:33 +0000 (UTC)
Subject: [Milsurplus] BC-348 - Power Supply
In-Reply-To: <e7995a36-845a-e48f-728f-839decc151e0@gmail.com>
References: <e7995a36-845a-e48f-728f-839decc151e0@gmail.com>
Message-ID: <1380495658.3099371.1549341513390@mail.yahoo.com>

HutchTwo things come to mind:One> Your transformer is in saturation because it wasn't designed to operate with the higher line voltage now in use.? In other words, the transformer core lacks enough iron to prevent saturation at high line voltage.? Along the same lines, the copper wire gauge is too thin and is presenting a larger IR drop to the capacitor charging current.
Two> Your filter capacitor is too large causing a big slug of current and this current is heating the high voltage winding over time.
If you have a VARIAC, try reducing the applied voltage to 115 vac and see if the temperature drops and B+ remains more or less constant over time.??
If your filter capacitor is too big try a smaller value or try adding 100 ohm or so power resistors between the rectifier plates and the high voltage transformer winding.??
The RA-20 power supply uses a pi filter with 8 uF filter capacitors.? The lower cap value allows for a longer conduction period.? Larger value filter capacitors shorten the conduction period with a corresponding increase in capacitor charging current.? Smaller value capacitors are easier on the rectifier tube too.
Let us know what you find that works the best,Jim
I wonder why people argue over the 10% of their differences and ignore the 90% they agree on? 

    On Monday, February 4, 2019, 9:26:58 PM CST, John Hutchins <jphutch60bj at gmail.com> wrote:  
 
 Have made several power supply versions for my BC-348R. ? I am close to 
what I want.? BUT, big? BUT,? I have a heat issue. Outside in free air 
the power supply stays on target +/- 2V.?? All buttoned up inside the 
BC-348, voltage drops slowly from 225V- to - 190 V? G.T > 1.5? hrs time 
and falling.? Stuck a wire thermal probe into the unit, temperature 
~37-39 C? 102F.? I am not surprised the voltage dropped, but had no Idea 
it would be > 10 %.? Any ideas/Suggestions on how to wrangle this issue 
please contact me "off" the list. ? I have a pic, windows .BMP file of 
the schematic.

Thanks

jphutch

______________________________________________________________
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 mmab at cox.net  Tue Feb  5 11:24:13 2019
From: mmab at cox.net (Michael Bittner)
Date: Tue, 5 Feb 2019 08:24:13 -0800
Subject: [Milsurplus] Unknown Receiver
Message-ID: <184EAA6411C94841AD077697185184E4@miked62f059f40>

https://www.ebay.com/itm/Vintage-Radio-Electronics-Tube/303051325593?hash=item468f444099:g:HfQAAOSwEJ1cT8BD:rk:68:pf:0

Looks like some kind of dry battery operated military receiver to me.  APC trimmer caps, MFP marking, etc.  Can anyone identify it?

Mike, W6MAB

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From kargo_cult at msn.com  Tue Feb  5 17:25:05 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Tue, 5 Feb 2019 22:25:05 +0000
Subject: [Milsurplus] test
Message-ID: <MWHPR14MB1485D27F510EE512CEA263DFE46E0@MWHPR14MB1485.namprd14.prod.outlook.com>

I could not reply to "unknown receiver" post; my message is bounced.
-Hue
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From kargo_cult at msn.com  Tue Feb  5 17:27:12 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Tue, 5 Feb 2019 22:27:12 +0000
Subject: [Milsurplus] Unk receiver
Message-ID: <MWHPR14MB1485234C4D5B958386C234D3E46E0@MWHPR14MB1485.namprd14.prod.outlook.com>


Very curious item. Pencil on right side seems to ( me, anyway ) read something like "OUT ..????"
with distances 100 yards to 5 miles. Which probably indicated the signal strength on the removed meter.
An LF beacon receiver ?
Truly a bargain. Only $6, well, plus ?the little matter of $39 shipping.
-Hue 


From kargo_cult at msn.com  Wed Feb  6 16:25:41 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 6 Feb 2019 21:25:41 +0000
Subject: [Milsurplus] Opinion on transformer ?
Message-ID: <MWHPR14MB1485415A06AD6339DF6CB294E46F0@MWHPR14MB1485.namprd14.prod.outlook.com>

I have a NIB transformer rated  180 V  500 mA and 6 V 5A.  The box says "Will deliver 470VDC in doubler circuit."
I am wondering, would this make a decent transformer for something like the Harvey Wells T-90 or Navy TCS
transmitter ? Or will more current be required at HV ? ( Ignoring filament requirements. )  I understand under
ICAS  transformer ratings can be "pushed".  But a doubler is not going to have very good regulation. Is that a
real drawback for AM operation?
tnx,
Hue
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From wa5cab at cs.com  Wed Feb  6 16:55:39 2019
From: wa5cab at cs.com (Robert Downs)
Date: Wed, 6 Feb 2019 15:55:39 -0600
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <MWHPR14MB1485415A06AD6339DF6CB294E46F0@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB1485415A06AD6339DF6CB294E46F0@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <00da01d4be66$b3866ce0$1a9346a0$@com>

TANSTAAFL.  If the transformer output is 180 VAC and the doubler output is
470 VDC, the output current rating would only be about 190 mA at 100%
efficiency.  Output watts has to be less than or equal to input watts.  I
don't know what the T-90 needs but the transformer isn't hefty enough for
the TCS transmitter.

 

Robert Downs

 

From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Hubert Miller
Sent: Wednesday, February 6, 2019 15:26
To: milsurplus at qth.net; Glowbugs
Subject: [Milsurplus] Opinion on transformer ?

 

I have a NIB transformer rated  180 V  500 mA and 6 V 5A.  The box says
"Will deliver 470VDC in doubler circuit."

I am wondering, would this make a decent transformer for something like the
Harvey Wells T-90 or Navy TCS 

transmitter ? Or will more current be required at HV ? ( Ignoring filament
requirements. )  I understand under

ICAS  transformer ratings can be "pushed".  But a doubler is not going to
have very good regulation. Is that a 

real drawback for AM operation?

tnx,

Hue 

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From kargo_cult at msn.com  Wed Feb  6 17:08:34 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 6 Feb 2019 22:08:34 +0000
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <MWHPR14MB1485415A06AD6339DF6CB294E46F0@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB1485415A06AD6339DF6CB294E46F0@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <MWHPR14MB1485AFB7F985562EBAAF171DE46F0@MWHPR14MB1485.namprd14.prod.outlook.com>

I do understand that you don't get something for nothing by doubling. I can see the T-90 is out, as at around its specd input,
it's going to want around 500 volt and nearing 200 mA alone, without AM. The TCS is about 40 watts input on AM so that
might work out, maybe ??  I am trying to think of a use for this transformer, try to figure out if it's sellable. I have stored it
for so many years, too many !!
-Hue
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From kc2we.1 at gmail.com  Wed Feb  6 17:34:01 2019
From: kc2we.1 at gmail.com (Seth Taylor)
Date: Wed, 6 Feb 2019 17:34:01 -0500
Subject: [Milsurplus] Opinion on transformer ?
Message-ID: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>

Take rms voltage. Double. From Shay's curves, multiply by 1.3. 180 x2 = 360 x 1.3 = 468.  Use at least 60 mfd effective capacitance on output. 

ST. ARRL Tech Advisor 
BSEE
Sent from my iPhone

From kgordon2006 at frontier.com  Wed Feb  6 17:35:10 2019
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Wed, 06 Feb 2019 14:35:10 -0800
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <MWHPR14MB1485415A06AD6339DF6CB294E46F0@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB1485415A06AD6339DF6CB294E46F0@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <5C5B611E.30839.105B015A@kgordon2006.frontier.com>

On 6 Feb 2019 at 21:25, Hubert Miller wrote:

> I have a NIB transformer rated ?180 V? 500 mA and 6 V 5A.? The box says
> "Will deliver 470VDC in doubler circuit." 

Actually, that will deliver +509 VDC output at 250 mA in a solid-state voltage-doubler circuit. 
180 X 2.828 = +509 VDC. That statement on that transformer obviously presumes tube type 
rectifiers which have significant voltage drop. Silicon doesn't.

> I am wondering, would this make a decent transformer for something
> like the Harvey Wells T-90 or Navy TCS transmitter ? 

The voltage sounds a little low to me for maximum output, but not beating the transmitter up 
would make it more reliable. I would use that. 500 VDC at 250 mA is 125 watts input.

What are the final amp tubes in either of those rigs? 807 or 1625? If so, then the maximum 
CCS plate voltage is 600 V. At 500 V in a plate-modulated Class C final amp, your output 
would be around 30 watts. If you had 600 V, output would be 44 watts (at best).

14 more watts isn't going to make enough difference at the receiving end to even be 
noticed.

If that was my transformer, I'd use it for what you mention. It would run cool and would last 
forever.

> Or will more current be required at HV ? ( Ignoring filament requirements. )

I would think not.

> I understand under ICAS ?transformer ratings can be "pushed".

Somewhat, yes, but I wouldn't go hog wild either. Again, I don't believe in beating things up 
just to get a few more watts output. It ain't worth it. But, in CW or SSB service, you can 
normally get that full 500 mA from your transformer, depending on how long you hold your 
key down. :-)

>?But a doubler is not going to have very good regulation.

That is not necessarily true. In the case of a doubler, regulation pretty much depends on the 
size of the filter capacitors used. According to several handbooks which have mentioned 
this over the years, anything less than 30 MFD total filter capacity makes regulation 
"marginal". This is why those OLDER linear amps which used voltage doubler supplies used 
filter caps which would total as close to 30 MFD as possible.

Higher total capacitance really helps regulation in doubler supplies. In addition, higher total 
filter capacitance also very seriously improves dynamic regulation, which is important for 
SSB and CW rigs, and also, I would suppose for those AM rigs which use the same supply 
for the RF and modulator..

> Is that a real drawback for AM operation?

Well, it would depend, again, on the value of your filter capacitors, but I would think not.

Personally, I always use the highest value filter capacitors I can install in voltage-doubler 
supplies, mainly to help improve the dynamic regulation. For instance, in my SB-200s, which 
originally used 6 ea 125 MFD  450 VDC capacitors for a total capacitance of about 20 MFD, 
when I restored those SB-200s, I replaced those with 560 MFD 450 VDC capacitors, for a 
total capacitance of about 93 MFD.

The unloaded voltage does not change, but the voltage under a steady load is slightly 
higher, and of course, you can't really tell how it improves the dynamic regulation without 
using a storage-oscilloscope.

However, tests by GE back "in the day" showed conclusively that higher values of output 
capacitance in linear amp power supplies makes a significant improvemant in both dynamic 
regulation, and a significant reduction in IMD for linear amps in SSB service. This was all 
published in one of GE's Ham Notes a long time ago.

I really like voltage-multiplying power supplies.

BTW, if you used a voltage-tripler, your output voltage would be 764 volts, but that would be 
too much for an 807 or 1625..

Ken W7EKB

From kgordon2006 at frontier.com  Wed Feb  6 18:14:56 2019
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Wed, 06 Feb 2019 15:14:56 -0800
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>
References: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>
Message-ID: <5C5B6A70.18851.107F6833@kgordon2006.frontier.com>

On 6 Feb 2019 at 17:34, Seth Taylor wrote:

> Take rms voltage. Double. From Shay's curves, multiply by 1.3. 180 x2
> = 360 x 1.3 = 468. 

I rountinely use 2 X SQRT 2, or about 2.828 X 180 = ~509. Seems to work out pretty 
accurately for me over the past 50 years.

> Use at least 60 mfd effective capacitance on output. 

**I** certainly would...

Ken W7EKB

From holden7471 at msn.com  Wed Feb  6 19:30:51 2019
From: holden7471 at msn.com (howard holden)
Date: Thu, 7 Feb 2019 00:30:51 +0000
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>
References: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>
Message-ID: <BYAPR06MB421300B781D31AD128BD7C94C4680@BYAPR06MB4213.namprd06.prod.outlook.com>

I use a 110-220V 150VA step down/isolation transformer (not an 
autotrans) backwards in a voltage "doubler" to power a Millen 90800, 
which uses a 6L6 oscillator and 807 amp. AC in is 120.5V, pretty normal 
for here in NNV, Ac out is just over 220V, DC out with a 20 ma bleeder 
current is 578V, so Seth's formula is pretty spot on. With about 100 mA 
(80 on the 807, 20 on the 6L6)load the voltage drops to 540. The output 
capacitance is effectively about 50 uF (100 uF per cap). I draw screen V 
(just a few mA) from the midpoint of the two caps. You will have more 
drop than that, as your trans is not as high on the VA rating and with 
phone you will be trying to pull more current. Can't give an opinion on 
the usefulness for AM as I almost never run phone.


73, Howie WB2AWQ





On 2/6/2019 2:34 PM, Seth Taylor wrote:
> Take rms voltage. Double. From Shay's curves, multiply by 1.3. 180 x2 = 360 x 1.3 = 468.  Use at least 60 mfd effective capacitance on output.
>
> ST. ARRL Tech Advisor
> BSEE
> Sent from my iPhone
> ______________________________________________________________
> 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 kb2vtl at gmail.com  Wed Feb  6 19:36:49 2019
From: kb2vtl at gmail.com (Peter Gottlieb)
Date: Wed, 6 Feb 2019 19:36:49 -0500
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <5C5B6A70.18851.107F6833@kgordon2006.frontier.com>
References: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>
	<5C5B6A70.18851.107F6833@kgordon2006.frontier.com>
Message-ID: <3EDE98F0-E22C-4312-A57E-26162AD59D13@gmail.com>

Remember that is peak value, which would be unloaded DC voltage. That will drop quickly under load due to transformer impedance, and hum will increase as well. 


Peter

> On Feb 6, 2019, at 6:14 PM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
> 
>> On 6 Feb 2019 at 17:34, Seth Taylor wrote:
>> 
>> Take rms voltage. Double. From Shay's curves, multiply by 1.3. 180 x2
>> = 360 x 1.3 = 468. 
> 
> I rountinely use 2 X SQRT 2, or about 2.828 X 180 = ~509. Seems to work out pretty 
> accurately for me over the past 50 years.
> 
>> Use at least 60 mfd effective capacitance on output. 
> 
> **I** certainly would...
> 
> Ken W7EKB
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

From smithab11 at comcast.net  Wed Feb  6 21:39:20 2019
From: smithab11 at comcast.net (B. Smith)
Date: Wed, 6 Feb 2019 21:39:20 -0500
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <3EDE98F0-E22C-4312-A57E-26162AD59D13@gmail.com>
References: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>
	<5C5B6A70.18851.107F6833@kgordon2006.frontier.com>
	<3EDE98F0-E22C-4312-A57E-26162AD59D13@gmail.com>
Message-ID: <2cb5ec5c-641a-b3e2-cf0b-3b21d5b9af80@comcast.net>

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From kb2vtl at gmail.com  Wed Feb  6 21:47:47 2019
From: kb2vtl at gmail.com (Peter Gottlieb)
Date: Wed, 6 Feb 2019 21:47:47 -0500
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <2cb5ec5c-641a-b3e2-cf0b-3b21d5b9af80@comcast.net>
References: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>
	<5C5B6A70.18851.107F6833@kgordon2006.frontier.com>
	<3EDE98F0-E22C-4312-A57E-26162AD59D13@gmail.com>
	<2cb5ec5c-641a-b3e2-cf0b-3b21d5b9af80@comcast.net>
Message-ID: <0e5ae352-829f-10ce-70c4-48aa4d57f4d9@gmail.com>

Fun!


On 2/6/2019 9:39 PM, B. Smith wrote:
> ?? ??? ??? This power supply designer software comes in handy. Great to answer 
> "What If" questions.
> http://www.duncanamps.com/psud2/
> Z
>
>
> On 2/6/2019 7:36 PM, Peter Gottlieb wrote:
>> Remember that is peak value, which would be unloaded DC voltage. That will drop quickly under load due to transformer impedance, and hum will increase as well.
>>
>>
>> Peter
>>
>>> On Feb 6, 2019, at 6:14 PM, Kenneth G. Gordon<kgordon2006 at frontier.com>  wrote:
>>>
>>>> On 6 Feb 2019 at 17:34, Seth Taylor wrote:
>>>>
>>>> Take rms voltage. Double. From Shay's curves, multiply by 1.3. 180 x2
>>>> = 360 x 1.3 = 468.
>>> I rountinely use 2 X SQRT 2, or about 2.828 X 180 = ~509. Seems to work out pretty
>>> accurately for me over the past 50 years.
>>>
>>>> Use at least 60 mfd effective capacitance on output.
>>> **I** certainly would...
>>>
>>> Ken W7EKB
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home:http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help:http://mailman.qth.net/mmfaq.htm
>>> Post:mailto:Milsurplus at mailman.qth.net
>>>
>>> This list hosted by:http://www.qsl.net
>>> Please help support this email list:http://www.qsl.net/donate.html
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home:http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help:http://mailman.qth.net/mmfaq.htm
>> Post:mailto:Milsurplus at mailman.qth.net
>>
>> This list hosted by:http://www.qsl.net
>> Please help support this email list:http://www.qsl.net/donate.html
>>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


From kgordon2006 at frontier.com  Wed Feb  6 21:58:05 2019
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Wed, 06 Feb 2019 18:58:05 -0800
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <3EDE98F0-E22C-4312-A57E-26162AD59D13@gmail.com>
References: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>,
	<5C5B6A70.18851.107F6833@kgordon2006.frontier.com>,
	<3EDE98F0-E22C-4312-A57E-26162AD59D13@gmail.com>
Message-ID: <5C5B9EBD.13007.896622@kgordon2006.frontier.com>

On 6 Feb 2019 at 19:36, Peter Gottlieb wrote:

> Remember that is peak value,

Yes. Exactly.

> which would be unloaded DC voltage.

Correct

> That will drop quickly under load due to transformer impedance, and hum
> will increase as well. 

Yes.

I just tried Seth's formula, and the result is much closer to "real" or "useable" or "practical" 
output voltage than the one I have been using for 50 years or so.

I do believe I have just now switched to Seth's formula for my power supply work from now 
on. :-)

Thank you, Seth.

I would like to know about "Shay's Curves" though....

One is never too old to learn something new and perhaps better or more accurate.

Ken Gordon W7EKB


From kgordon2006 at frontier.com  Wed Feb  6 22:02:23 2019
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Wed, 06 Feb 2019 19:02:23 -0800
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <2cb5ec5c-641a-b3e2-cf0b-3b21d5b9af80@comcast.net>
References: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>,
	<3EDE98F0-E22C-4312-A57E-26162AD59D13@gmail.com>,
	<2cb5ec5c-641a-b3e2-cf0b-3b21d5b9af80@comcast.net>
Message-ID: <5C5B9FBF.1898.8D5352@kgordon2006.frontier.com>

On 6 Feb 2019 at 21:39, B. Smith wrote:

> This power supply designer software comes in handy. Great to answer
> "What If" questions. http://www.duncanamps.com/psud2/ Z 

Yes. I have used that very often over the past several years. Nice piece of software.

Ken W7EKB

From antqradio at sbcglobal.net  Wed Feb  6 22:35:58 2019
From: antqradio at sbcglobal.net (Jim Whartenby)
Date: Thu, 7 Feb 2019 03:35:58 +0000 (UTC)
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <5C5B9FBF.1898.8D5352@kgordon2006.frontier.com>
References: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>
	<3EDE98F0-E22C-4312-A57E-26162AD59D13@gmail.com>
	<2cb5ec5c-641a-b3e2-cf0b-3b21d5b9af80@comcast.net>
	<5C5B9FBF.1898.8D5352@kgordon2006.frontier.com>
Message-ID: <1693917359.4403324.1549510558714@mail.yahoo.com>

Ah!? CAD programs can be a bit like the definition for LOGIC:Method used to arrive at the wrong conclusion with confidence! <grin>Jim
I wonder why people argue over the 10% of their differences and ignore the 90% they agree on? 

    On Wednesday, February 6, 2019, 9:02:58 PM CST, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:  
 
 On 6 Feb 2019 at 21:39, B. Smith wrote:

> This power supply designer software comes in handy. Great to answer
> "What If" questions. http://www.duncanamps.com/psud2/ Z 

Yes. I have used that very often over the past several years. Nice piece of software.

Ken W7EKB
______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
  
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From kgordon2006 at frontier.com  Wed Feb  6 22:47:02 2019
From: kgordon2006 at frontier.com (Kenneth G. Gordon)
Date: Wed, 06 Feb 2019 19:47:02 -0800
Subject: [Milsurplus] Opinion on transformer ?
In-Reply-To: <1693917359.4403324.1549510558714@mail.yahoo.com>
References: <EF264A26-0F89-462C-A4C5-906B00DB534F@gmail.com>,
	<5C5B9FBF.1898.8D5352@kgordon2006.frontier.com>,
	<1693917359.4403324.1549510558714@mail.yahoo.com>
Message-ID: <5C5BAA36.6670.B634C6@kgordon2006.frontier.com>

On 7 Feb 2019 at 3:35, Jim Whartenby wrote:

> Ah!? CAD programs can be a bit like the definition for LOGIC:
> Method used to arrive at the wrong conclusion with confidence! <grin>
> Jim

OH yes!

Well, PSU designer II says that Hue will get 449 VDC at a 90 mA load out of his power 
supply using that transformer. Seems pretty close to me.

Ken W7EKB

From kargo_cult at msn.com  Thu Feb  7 16:55:49 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Thu, 7 Feb 2019 21:55:49 +0000
Subject: [Milsurplus] PV-2 Stowed Radio Spares ?
Message-ID: <MWHPR14MB148538060FFB78FFCC86C3A6E4680@MWHPR14MB1485.namprd14.prod.outlook.com>

"PV-2 PLANE CAPTAIN'S HANDBOOK      FIrst Edition    Service Manuals Department, Engineering Branch Factory 'A', Lockheed Corp. Burbank California  1944"

This is one I'm soon to put on Ebay. But I noted following paragraph on page 151. No other radio information.

"The radio spare parts consist of a spare receiver, a spare transmitter, and minor radio repair parts. The spare parts stowage compartment is made of plywood with a metal
liner and is located between stations 392 and 410 on the right side of the cabin near the floor. There are also a few spare parts stowed in the stowage compartment on the
right side of the cabin opposite the cabin door."

Your comments?
Seems to me carrying an extra transmitter is a lot of dead weight, if this refers to an ATC / ART-13.

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From kargo_cult at msn.com  Thu Feb  7 17:20:12 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Thu, 7 Feb 2019 22:20:12 +0000
Subject: [Milsurplus] PV-2 Stowed Radio Spares ?
In-Reply-To: <MWHPR14MB148538060FFB78FFCC86C3A6E4680@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB148538060FFB78FFCC86C3A6E4680@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <MWHPR14MB148546A4A5D5D668F58A3C94E4680@MWHPR14MB1485.namprd14.prod.outlook.com>

And BTW, the lifeboat kit does not include an emergency radio. I believe, from my reading, those were only carried on some larger craft, to be used by their own crews,
or dropped to survivors on rafts.
-H
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From taigh at twinbeech.com  Thu Feb  7 19:00:34 2019
From: taigh at twinbeech.com (Taigh Ramey)
Date: Thu, 7 Feb 2019 16:00:34 -0800
Subject: [Milsurplus] PV-2 Stowed Radio Spares ?
In-Reply-To: <MWHPR14MB148546A4A5D5D668F58A3C94E4680@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB148538060FFB78FFCC86C3A6E4680@MWHPR14MB1485.namprd14.prod.outlook.com>
	<MWHPR14MB148546A4A5D5D668F58A3C94E4680@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <0f5201d4bf41$51d17d10$f5747730$@twinbeech.com>

The PV-1 did carry a Gibson Girl radio but it was separate from the life
raft that was inside of the entry door. 

 

Thanks,

 

Taigh

 

Taigh Ramey

Vintage Aircraft Inc.

7432 C.E.Dixon Street

Stockton, California 95206

(209) 982-0273

(209) 982-4832 Fax

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

KEEP 'EM FLYING...FOR HISTORY!

 

From: milsurplus-bounces at mailman.qth.net
<milsurplus-bounces at mailman.qth.net> On Behalf Of Hubert Miller
Sent: Thursday, February 07, 2019 2:20 PM
To: milsurplus at qth.net
Subject: Re: [Milsurplus] PV-2 Stowed Radio Spares ?

 

And BTW, the lifeboat kit does not include an emergency radio. I believe,
from my reading, those were only carried on some larger craft, to be used by
their own crews,

or dropped to survivors on rafts.

-H 

 


 
<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_cam
paign=sig-email&utm_content=emailclient> 

Virus-free.
<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_cam
paign=sig-email&utm_content=emailclient> www.avg.com 

 

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From navy.radio at gmail.com  Fri Feb  8 16:05:13 2019
From: navy.radio at gmail.com (Nick England)
Date: Fri, 8 Feb 2019 16:05:13 -0500
Subject: [Milsurplus] 1965 USN HF receiver - remotely tuned,
	automatically controlled
Message-ID: <CAB55hNchfD3jUYXK-Oa-jo_nsHw38K0ptuJqTs_Oy-t=a4kmQw@mail.gmail.com>

 I found a 1965 General Dynamics recruiting ad touting this project -
"And a remotely tuned, automatically controlled HF communications receiving
set for the Navy's most far-reaching project, Southern Cross;"

Anyone know more about this receiver? Was the R-1051 an outgrowth? But it
wasn't ever remotely tuned.....was it?

Project Southern Cross - I am looking for info on this USN project for
advanced communications circa 1965 - Here's all I have found so far -
A very general description from the Jan 1965 Bureau of Ships Journal -
http://www.navy-radio.com/journal/so_cross-journal-1965.pdf

Cheers
Nick England K4NYW
www.navy-radio.com
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From kargo_cult at msn.com  Fri Feb  8 16:15:45 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Fri, 8 Feb 2019 21:15:45 +0000
Subject: [Milsurplus] RBM - HF Junkers avail OR state
Message-ID: <MWHPR14MB1485A2DF2220C5A9F9A9CAE0E4690@MWHPR14MB1485.namprd14.prod.outlook.com>

I have 2 junker RBM - hf receivers. One has the top lid missing. The  better one has a hole in upper left where maybe somebody wanted to install
a meter. Most tubes have been plucked. Maybe you could make one receiver from 2, or use as parts for your own working receiver. I will give these
away cost-free, no shipping. I will be at the NWVRS meet, probably, Sat. Feb. 9 , tomorrow, weather agreeing - if there's any hint of snow, I'm not going.
I will be at the Rickreall OR hamfest the next weekend. If no one speaks up, I will be taking these to the NWVRS tomorrow.
-Hue
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From kargo_cult at msn.com  Fri Feb  8 20:03:35 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Sat, 9 Feb 2019 01:03:35 +0000
Subject: [Milsurplus] BC-347-A  Interphone question
Message-ID: <DM5PR14MB1483D59F16720835FF1B0A6CE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>

I was looking at a new unissued, in original packing BC-347-A interphone amplifier.
Looking at the back side, I see in each of four corners, but not rigorously in the same exact position for each corner, a wire-sized hole.
The first time I noted this, on a used BC-347-A, I thought, aha, someone wanted to run wires into it, for a ham hack.
But this new one has the same.
What are these holes about ? They are ungrommeted, so any wire transiting would be abraded.
thanks-
Hue
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From kargo_cult at msn.com  Fri Feb  8 20:08:34 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Sat, 9 Feb 2019 01:08:34 +0000
Subject: [Milsurplus] Artillery battalion radio plan, late 1930s
Message-ID: <DM5PR14MB1483014BB9998B90E9BB6C2AE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>

An Army artillery text from late 1930s identifies the SCR-178 as the air-ground radio; SCR-245 as air alert net receiver;
and SCR-161 as division HQ to Artillery unit radio.  And oh, yes, almost forgot, SCR-194 as observer radio.
Yes, seems a little odd.
I think I will scan the page network schematic but this will be a while; I have to disassemble the book ( nondestructively do-able )
to scan the page.
Comments, any ?
-Hue
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From kargo_cult at msn.com  Fri Feb  8 20:18:29 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Sat, 9 Feb 2019 01:18:29 +0000
Subject: [Milsurplus] Interphone etc. question late 1930s
Message-ID: <DM5PR14MB148318F26B7721516956D9BFE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>

I mentioned before here that I have a BC-224-A, BC-307-A, and BC-310.
As no one, at least in the online groups, wants to pay the ~ $2K I think they're worth together, it looks like I will be keeping them for some years yet.
I do want to keep these 3 radios associated with the B-18 and early B-17 together. I am certainly loathe to ever have them go to an overseas buyer
via auction.
Anyway, since I want to keep these together, I ask: what might I look for in the way of associated interphone amplifiers, beam filters, and / or
switch boxes ? I have the BC-347 and BC-366, but I think they're too late.
Also, I am always interested in leads for a manual or at least schematic for the BC-310 RDF receiver.
thanks-
Hue
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From mmab at cox.net  Fri Feb  8 21:00:30 2019
From: mmab at cox.net (Michael Bittner)
Date: Fri, 8 Feb 2019 18:00:30 -0800
Subject: [Milsurplus] BC-347-A  Interphone question
References: <DM5PR14MB1483D59F16720835FF1B0A6CE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
Message-ID: <61FF67C14E8E4BE4A6D910392F4C464D@miked62f059f40>

Weep holes for condensation?

Uses 6F8G dual triode tube.  Good for Twinplex regen rcvr?

Mike, W6MAB

  ----- Original Message ----- 
  From: Hubert Miller 
  To: milsurplus at qth.net 
  Sent: Friday, February 08, 2019 17:03
  Subject: [Milsurplus] BC-347-A Interphone question


  I was looking at a new unissued, in original packing BC-347-A interphone amplifier. 
  Looking at the back side, I see in each of four corners, but not rigorously in the same exact position for each corner, a wire-sized hole. 

  The first time I noted this, on a used BC-347-A, I thought, aha, someone wanted to run wires into it, for a ham hack.

  But this new one has the same.

  What are these holes about ? They are ungrommeted, so any wire transiting would be abraded.

  thanks-

  Hue 



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


  ______________________________________________________________
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  Help: http://mailman.qth.net/mmfaq.htm
  Post: mailto:Milsurplus at mailman.qth.net

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From aaf-radio-1 at aafradio.org  Fri Feb  8 21:12:35 2019
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Fri, 8 Feb 2019 21:12:35 -0500
Subject: [Milsurplus] BC-347-A Interphone question
In-Reply-To: <DM5PR14MB1483D59F16720835FF1B0A6CE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
References: <DM5PR14MB1483D59F16720835FF1B0A6CE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
Message-ID: <6d294ad4-83c3-56db-0dd5-6f90eb18d45f@aafradio.org>

On 2/8/2019 8:03 PM, Hubert Miller wrote:
>
> I was looking at a new unissued, in original packing BC-347-A 
> interphone amplifier.
> Looking at the back side, I see in each of four corners, but not 
> rigorously in the same exact position for each corner, a wire-sized hole.
>
> The first time I noted this, on a used BC-347-A, I thought, aha, 
> someone wanted to run wires into it, for a ham hack.
>
> But this new one has the same.
>
> What are these holes about ? They are ungrommeted, so any wire 
> transiting would be abraded.
>

Moisture relief.? In a closed box that is not hermetically sealed, one 
that experiences external temperature and humidity changes over a 24 
hour period, you need to have some way to "level" the humidity inside 
the box.? Failure to do so means that condensed water inside the box 
keeps increasing over time.? There are numerous tech bulletins issued 
about drilling such holes for aircraft control boxes and the like.

 ??????? 73,
-Mike KC4TOS


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From aaf-radio-1 at aafradio.org  Fri Feb  8 21:22:50 2019
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Fri, 8 Feb 2019 21:22:50 -0500
Subject: [Milsurplus] Interphone etc. question late 1930s
In-Reply-To: <DM5PR14MB148318F26B7721516956D9BFE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
References: <DM5PR14MB148318F26B7721516956D9BFE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
Message-ID: <14dd76ad-3635-927b-f580-2885c86d1c52@aafradio.org>

See http://aafradio.org/flightdeck/Interphone_systems.html - BC-212 
interphone amplifier, FL-5 beam filter, RC-15, RC-27, and RC-45 
Interphone Equipment, etc.

 ???????? 73,
 ?- Mike KC4TOS

On 2/8/2019 8:18 PM, Hubert Miller wrote:
>
> I mentioned before here that I have a BC-224-A, BC-307-A, and BC-310.
>
> As no one, at least in the online groups, wants to pay the ~ $2K I 
> think they're worth together, it looks like I will be keeping them for 
> some years yet.
>
> I do want to keep these 3 radios associated with the B-18 and early 
> B-17 together. I am certainly loathe to ever have them go to an 
> overseas buyer
>
> via auction.
>
> Anyway, since I want to keep these together, I ask: what might I look 
> for in the way of associated interphone amplifiers, beam filters, and / or
>
> switch boxes ? I have the BC-347 and BC-366, but I think they're too late.
>
> Also, I am always interested in leads for a manual or at least 
> schematic for the BC-310 RDF receiver.
>
> thanks-
>
> Hue
>
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From wa5cab at cs.com  Sat Feb  9 01:24:37 2019
From: wa5cab at cs.com (Robert Downs)
Date: Sat, 9 Feb 2019 00:24:37 -0600
Subject: [Milsurplus] [armyradios] Artillery battalion radio plan,
	late 1930s
In-Reply-To: <DM5PR14MB1483014BB9998B90E9BB6C2AE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
References: <DM5PR14MB1483014BB9998B90E9BB6C2AE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
Message-ID: <013601d4c040$22709330$6751b990$@com>

SCR-245-(*) consists of BC-223-(*) transmitter and BC-312-(*) receiver.  I
think earliest Signal Corps Orders were FY 1940.

 

Robert Downs

 

From: armyradios at yahoogroups.com [mailto:armyradios at yahoogroups.com] 
Sent: Friday, February 8, 2019 19:09
To: milsurplus at qth.net; armyradios at yahoogroups.com
Subject: [armyradios] Artillery battalion radio plan, late 1930s

 

  

An Army artillery text from late 1930s identifies the SCR-178 as the
air-ground radio; SCR-245 as air alert net receiver;

and SCR-161 as division HQ to Artillery unit radio.  And oh, yes, almost
forgot, SCR-194 as observer radio. 
Yes, seems a little odd.

I think I will scan the page network schematic but this will be a while; I
have to disassemble the book ( nondestructively do-able )

to scan the page. 

Comments, any ?

-Hue 

__._,_.___

  _____  

Posted by: Hubert Miller <kargo_cult at msn.com> 

  _____  

_._,___

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From wa5cab at cs.com  Sat Feb  9 01:31:32 2019
From: wa5cab at cs.com (Robert Downs)
Date: Sat, 9 Feb 2019 00:31:32 -0600
Subject: [Milsurplus] Interphone etc. question late 1930s
In-Reply-To: <DM5PR14MB148318F26B7721516956D9BFE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
References: <DM5PR14MB148318F26B7721516956D9BFE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
Message-ID: <013b01d4c041$19b81a50$4d284ef0$@com>

I don't have them but T.O. 08-10-11 & -21 cover SCR-242.  T.O. 08-10-27
covers that and SCR-282.

 

Robert Downs

 

From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Hubert Miller
Sent: Friday, February 8, 2019 19:18
To: milsurplus at qth.net
Subject: [Milsurplus] Interphone etc. question late 1930s

 

I mentioned before here that I have a BC-224-A, BC-307-A, and BC-310. 

As no one, at least in the online groups, wants to pay the ~ $2K I think
they're worth together, it looks like I will be keeping them for some years
yet. 

I do want to keep these 3 radios associated with the B-18 and early B-17
together. I am certainly loathe to ever have them go to an overseas buyer

via auction. 

Anyway, since I want to keep these together, I ask: what might I look for in
the way of associated interphone amplifiers, beam filters, and / or

switch boxes ? I have the BC-347 and BC-366, but I think they're too late.

Also, I am always interested in leads for a manual or at least schematic for
the BC-310 RDF receiver. 

thanks-

Hue 

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From jphutch60bj at gmail.com  Sat Feb  9 11:52:21 2019
From: jphutch60bj at gmail.com (John Hutchins)
Date: Sat, 9 Feb 2019 10:52:21 -0600
Subject: [Milsurplus] BC-347-A Interphone question
In-Reply-To: <61FF67C14E8E4BE4A6D910392F4C464D@miked62f059f40>
References: <DM5PR14MB1483D59F16720835FF1B0A6CE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
	<61FF67C14E8E4BE4A6D910392F4C464D@miked62f059f40>
Message-ID: <39b55353-3f6a-cb37-3723-228a36585a78@gmail.com>

I am shooting for bending holes when forming rectangle boxes SOP for 
metal work

On 2/8/2019 8:00 PM, Michael Bittner wrote:
> Weep holes for condensation?
> Uses 6F8G dual triode tube.? Good for Twinplex regen rcvr?
> Mike, W6MAB
>
>     ----- Original Message -----
>     *From:* Hubert Miller <mailto:kargo_cult at msn.com>
>     *To:* milsurplus at qth.net <mailto:milsurplus at qth.net>
>     *Sent:* Friday, February 08, 2019 17:03
>     *Subject:* [Milsurplus] BC-347-A Interphone question
>
>     I was looking at a new unissued, in original packing BC-347-A
>     interphone amplifier.
>     Looking at the back side, I see in each of four corners, but not
>     rigorously in the same exact position for each corner, a
>     wire-sized hole.
>
>     The first time I noted this, on a used BC-347-A, I thought, aha,
>     someone wanted to run wires into it, for a ham hack.
>
>     But this new one has the same.
>
>     What are these holes about ? They are ungrommeted, so any wire
>     transiting would be abraded.
>
>     thanks-
>
>     Hue
>
>     ------------------------------------------------------------------------
>     ______________________________________________________________
>     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
>
>
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon> 
> 	Virus-free. www.avast.com 
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link> 
>
>
> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>
> ______________________________________________________________
> 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 aaf-radio-1 at aafradio.org  Sat Feb  9 14:14:17 2019
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Sat, 9 Feb 2019 14:14:17 -0500
Subject: [Milsurplus] BC-347-A Interphone question
In-Reply-To: <39b55353-3f6a-cb37-3723-228a36585a78@gmail.com>
References: <DM5PR14MB1483D59F16720835FF1B0A6CE46A0@DM5PR14MB1483.namprd14.prod.outlook.com>
	<61FF67C14E8E4BE4A6D910392F4C464D@miked62f059f40>
	<39b55353-3f6a-cb37-3723-228a36585a78@gmail.com>
Message-ID: <acf4b5c9-fc76-9598-3540-3bbc686eada9@aafradio.org>

That's actually a pretty good guess, except that in the case of the 
holes in the BC-347-*, they are not always in the corners and the 
construction is die cast, with two opposite corners having an integral 
boss that is threaded for the two assembly screws.? See attached photo 
of back.? With four holes in the back and two in the lower front, you 
can mount the amplifier either vertically or horizontally and always 
have four holes available to drain water.? I took a few minutes to look 
for an example of one of the weephole advisories, and the first one of 
several that popped out was this one from The Airborne Radio Maintenance 
Notes dated November 1945, in this case for the associated BC-366 jack box.
73,? Mike? KC4TOS





On 2/9/2019 11:52 AM, John Hutchins wrote:
>
> I am shooting for bending holes when forming rectangle boxes SOP for 
> metal work
>
> On 2/8/2019 9:12 PM, Michael Hanz wrote:
>> Moisture relief.? In a closed box that is not hermetically sealed, 
>> one that experiences external temperature and humidity changes over a 
>> 24 hour period, you need to have some way to "level" the humidity 
>> inside the box.? Failure to do so means that condensed water inside 
>> the box keeps increasing over time.? There are numerous tech 
>> bulletins issued about drilling such holes for aircraft control boxes 
>> and the like.
>>
>> ??????? 73,
>> -Mike KC4TOS
>>
>>     ----- Original Message -----
>>     *From:* Hubert Miller <mailto:kargo_cult at msn.com>
>>     *To:* milsurplus at qth.net <mailto:milsurplus at qth.net>
>>     *Sent:* Friday, February 08, 2019 17:03
>>     *Subject:* [Milsurplus] BC-347-A Interphone question
>>
>>     I was looking at a new unissued, in original packing BC-347-A
>>     interphone amplifier.
>>     Looking at the back side, I see in each of four corners, but not
>>     rigorously in the same exact position for each corner, a
>>     wire-sized hole.
>>
>>     The first time I noted this, on a used BC-347-A, I thought, aha,
>>     someone wanted to run wires into it, for a ham hack.
>>
>>     But this new one has the same.
>>
>>     What are these holes about ? They are ungrommeted, so any wire
>>     transiting would be abraded.
>>
>>     thanks-
>>
>>     Hue
>>
>>     ------------------------------------------------------------------------
>>     ______________________________________________________________
>>     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
>>
>>
>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon> 
>> 	Virus-free. www.avast.com 
>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link> 
>>
>>
>> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
>>
>> ______________________________________________________________
>> 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

-- 
Michael Hanz - KC4TOS

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From navy.radio at gmail.com  Sun Feb 10 14:55:14 2019
From: navy.radio at gmail.com (Nick England)
Date: Sun, 10 Feb 2019 14:55:14 -0500
Subject: [Milsurplus] 1965 USN HF receiver - remotely tuned,
	automatically controlled
In-Reply-To: <CAB55hNchfD3jUYXK-Oa-jo_nsHw38K0ptuJqTs_Oy-t=a4kmQw@mail.gmail.com>
References: <CAB55hNchfD3jUYXK-Oa-jo_nsHw38K0ptuJqTs_Oy-t=a4kmQw@mail.gmail.com>
Message-ID: <CAB55hNf-jrfZMGSv38FjNU+AxoGEwkHECrnedX9DNW29yrj4rA@mail.gmail.com>

Well, it appears that Project Southern Cross had a short life -
Here's a 1967 article talking about some portions of the cancelled Southern
Cross project -
http://www.navy-radio.com/journal/comm-trends-6710.pdf

Nick England K4NYW
www.navy-radio.com


On Fri, Feb 8, 2019 at 4:05 PM Nick England <navy.radio at gmail.com> wrote:

> I found a 1965 General Dynamics recruiting ad touting this project -
> "And a remotely tuned, automatically controlled HF communications
> receiving set for the Navy's most far-reaching project, Southern Cross;"
>
> Anyone know more about this receiver? Was the R-1051 an outgrowth? But it
> wasn't ever remotely tuned.....was it?
>
> Project Southern Cross - I am looking for info on this USN project for
> advanced communications circa 1965 - Here's all I have found so far -
> A very general description from the Jan 1965 Bureau of Ships Journal -
> http://www.navy-radio.com/journal/so_cross-journal-1965.pdf
>
> Cheers
> Nick England K4NYW
> www.navy-radio.com
>
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From kb8tq at n1k.org  Sun Feb 10 15:43:10 2019
From: kb8tq at n1k.org (Bob kb8tq)
Date: Sun, 10 Feb 2019 15:43:10 -0500
Subject: [Milsurplus] 1965 USN HF receiver - remotely tuned,
 automatically controlled
In-Reply-To: <CAB55hNf-jrfZMGSv38FjNU+AxoGEwkHECrnedX9DNW29yrj4rA@mail.gmail.com>
References: <CAB55hNchfD3jUYXK-Oa-jo_nsHw38K0ptuJqTs_Oy-t=a4kmQw@mail.gmail.com>
	<CAB55hNf-jrfZMGSv38FjNU+AxoGEwkHECrnedX9DNW29yrj4rA@mail.gmail.com>
Message-ID: <4BD7EAD7-EEF6-4AAB-B128-13FEC6952CE3@n1k.org>

Hi

A chunk of GD?s HF com manufacturing also didn?t make it very far past 1965. RF Communications 
(part of Harris for quite a while now) in Rochester was the outgrowth of that ?transition?. 

Bob

> On Feb 10, 2019, at 2:55 PM, Nick England <navy.radio at gmail.com> wrote:
> 
> Well, it appears that Project Southern Cross had a short life -
> Here's a 1967 article talking about some portions of the cancelled Southern Cross project -
> http://www.navy-radio.com/journal/comm-trends-6710.pdf <http://www.navy-radio.com/journal/comm-trends-6710.pdf>
> 
> Nick England K4NYW
> www.navy-radio.com <http://www.navy-radio.com/>
> 
> 
> On Fri, Feb 8, 2019 at 4:05 PM Nick England <navy.radio at gmail.com <mailto:navy.radio at gmail.com>> wrote:
> I found a 1965 General Dynamics recruiting ad touting this project - 
> "And a remotely tuned, automatically controlled HF communications receiving set for the Navy's most far-reaching project, Southern Cross;"
> 
> Anyone know more about this receiver? Was the R-1051 an outgrowth? But it wasn't ever remotely tuned.....was it?
> 
> Project Southern Cross - I am looking for info on this USN project for advanced communications circa 1965 - Here's all I have found so far -
> A very general description from the Jan 1965 Bureau of Ships Journal -
> http://www.navy-radio.com/journal/so_cross-journal-1965.pdf <http://www.navy-radio.com/journal/so_cross-journal-1965.pdf>
> 
> Cheers
> 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

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From n2lxm at juno.com  Mon Feb 11 20:50:27 2019
From: n2lxm at juno.com (n2lxm at juno.com)
Date: Mon, 11 Feb 2019 20:50:27 -0500
Subject: [Milsurplus] The Saga of the Drake 2B continues
Message-ID: <AABQGELFDARPDCXJ@smtpout04.vgs.untd.com>

Good Evening All,


        Back in January I was working with a good friend on his basket
case 2B. We had a few issues (well a lot really) to deal with but got the
Old Girl receiving signals. We were both able to get together on Sunday
do some more work on it. Well the weird stuff is still happening. We
could receive good signals on the 40 and 80 meter bands, but the S-meter,
AVC, and Noise Limiter were still not working well. So out came the
Voltage / resistive chart. When we got to the 6U8 ( 1st Mixer, 2nd mixer,
VFO) we found - 130 VDC on pin 6. How can a grid have -130 VDC on it. We
used three different (VTVM, VOM, DVM) meters to check it. So out it came,
found a NOS one and put in, now we were have +.495 on the pin, not
perfect but close enough. Reset the AVC voltage as per the manual,
S-meter now working better. Now on to a damaged IF can. Pulled the can
off the coil, it was then apparent that the former owner had been inside.
We were able to dislodged the broken core, fix the top of the paper tube,
straighten out the bent can top. Now to find a tuning slug that would fit
and do the job. Well luck would have it, while looking through my stash
of IF transformers. I came across a small plastic bag, Manufactured by
Neida Electronic Mfg, IL-108. It was a 20pc iron core slug kit, with a
whooping price of $1.00 tagged on it. So we found one that was the right
diameter and put it all back together. Did a quick IF alinement. But as
we were finishing up on that the bands went dead. So we turned the old
girl off and called it a night. So when we get back together, it will on
to a full alignment and the noise limiter. Been interesting doing this
repair. Makes me want to be sure that anything I do on old radios is done
right. So the next owner world have to deal with this type of stuff. Also
makes me realize some people should not be aloud to Handel a soldering
iron. Will report more as we go forward on this project.


                                                    Jeff N2LXM
                                          Amateur Radio Operator
                                                      American
                                                        Patriot
                                     Proud Father of Two US Marines

____________________________________________________________
1 Cup Of This Tonight Will Melt Your Belly Fat
mayserve-magestor.com
http://thirdpartyoffers.juno.com/TGL3141/5c6228a39c53928a357e6st04vuc

From kb2vtl at gmail.com  Mon Feb 11 21:40:39 2019
From: kb2vtl at gmail.com (Peter Gottlieb)
Date: Mon, 11 Feb 2019 21:40:39 -0500
Subject: [Milsurplus] The Saga of the Drake 2B continues
In-Reply-To: <AABQGELFDARPDCXJ@smtpout04.vgs.untd.com>
References: <AABQGELFDARPDCXJ@smtpout04.vgs.untd.com>
Message-ID: <7987b822-85c6-ef79-4e56-f9edfffb872a@gmail.com>

I am fortunate that my friends who have me help me on their radios are competent 
with repairs and also know their limits.? I have seen repairs come back from 
professional shops where I think the techs who worked on the gear should 
definitely find a new line of work.

Peter
KB2VTL


On 2/11/2019 8:50 PM, n2lxm at juno.com wrote:
> Good Evening All,
>
>
>          Back in January I was working with a good friend on his basket
> case 2B. We had a few issues (well a lot really) to deal with but got the
> Old Girl receiving signals. We were both able to get together on Sunday
> do some more work on it. Well the weird stuff is still happening. We
> could receive good signals on the 40 and 80 meter bands, but the S-meter,
> AVC, and Noise Limiter were still not working well. So out came the
> Voltage / resistive chart. When we got to the 6U8 ( 1st Mixer, 2nd mixer,
> VFO) we found - 130 VDC on pin 6. How can a grid have -130 VDC on it. We
> used three different (VTVM, VOM, DVM) meters to check it. So out it came,
> found a NOS one and put in, now we were have +.495 on the pin, not
> perfect but close enough. Reset the AVC voltage as per the manual,
> S-meter now working better. Now on to a damaged IF can. Pulled the can
> off the coil, it was then apparent that the former owner had been inside.
> We were able to dislodged the broken core, fix the top of the paper tube,
> straighten out the bent can top. Now to find a tuning slug that would fit
> and do the job. Well luck would have it, while looking through my stash
> of IF transformers. I came across a small plastic bag, Manufactured by
> Neida Electronic Mfg, IL-108. It was a 20pc iron core slug kit, with a
> whooping price of $1.00 tagged on it. So we found one that was the right
> diameter and put it all back together. Did a quick IF alinement. But as
> we were finishing up on that the bands went dead. So we turned the old
> girl off and called it a night. So when we get back together, it will on
> to a full alignment and the noise limiter. Been interesting doing this
> repair. Makes me want to be sure that anything I do on old radios is done
> right. So the next owner world have to deal with this type of stuff. Also
> makes me realize some people should not be aloud to Handel a soldering
> iron. Will report more as we go forward on this project.
>
>
>                                                      Jeff N2LXM
>                                            Amateur Radio Operator
>                                                        American
>                                                          Patriot
>                                       Proud Father of Two US Marines
>
> ____________________________________________________________
> 1 Cup Of This Tonight Will Melt Your Belly Fat
> mayserve-magestor.com
> http://thirdpartyoffers.juno.com/TGL3141/5c6228a39c53928a357e6st04vuc
> ______________________________________________________________
> 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  Tue Feb 12 03:17:05 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Tue, 12 Feb 2019 08:17:05 +0000
Subject: [Milsurplus] BC-654 production
Message-ID: <MWHPR14MB1485F38CA2340CA90A1D2E97E4650@MWHPR14MB1485.namprd14.prod.outlook.com>

Wikipedia: 
Over 150,000 units were eventually produced in total. After the war, many BC-654s were sold as surplus for $15 each. Today, many are restored and operated by https://en.wikipedia.org/wiki/Vintage_amateur_radio enthusiasts.https://en.wikipedia.org/wiki/SCR-284#cite_note-11 "

I don't think that 150k figure is right. I thought it was something north of 50K ?
-Hue 

From kargo_cult at msn.com  Tue Feb 12 03:49:54 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Tue, 12 Feb 2019 08:49:54 +0000
Subject: [Milsurplus] Change M-1 for BC-347-A  ?
In-Reply-To: <MWHPR14MB1485E6D391F23303EAE98A79E4650@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB1485E6D391F23303EAE98A79E4650@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <MWHPR14MB14855D2591039B5A58A11A85E4650@MWHPR14MB1485.namprd14.prod.outlook.com>


So what is the Change 1 ? Is it the 4 drain holes added to the back ? This stamp seen on 2 units; one with same holes does not have the stamp.
-Hue
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From aaf-radio-1 at aafradio.org  Tue Feb 12 08:22:27 2019
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Tue, 12 Feb 2019 08:22:27 -0500
Subject: [Milsurplus] Change M-1 for BC-347-A ?
In-Reply-To: <MWHPR14MB14855D2591039B5A58A11A85E4650@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB1485E6D391F23303EAE98A79E4650@MWHPR14MB1485.namprd14.prod.outlook.com>
	<MWHPR14MB14855D2591039B5A58A11A85E4650@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <9a4ac5c1-dac9-cf3b-4ebf-6b9c931a5bb2@aafradio.org>

On 2/12/2019 3:49 AM, Hubert Miller wrote:
>
> So what is the Change 1 ? Is it the 4 drain holes added to the back ? 
> This stamp seen on 2 units; one with same holes does not have the stamp.
>

All the BC-347-* amps I have ever seen have holes in the back, Hue. Some 
even have a couple of holes in the front edges as well.

The difference between BC-347-A and BC-347-A (Modified) can be seen in 
the schematics below - the change is in the grid resistor 
configuration.? For contrast the BC-347-C is also shown at the bottom, 
with yet a different grid resistor approach.? The BC-347-A (modified) 
was considered functionally equivalent to the BC-347-C.







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From antqradio at sbcglobal.net  Tue Feb 12 16:31:00 2019
From: antqradio at sbcglobal.net (Jim Whartenby)
Date: Tue, 12 Feb 2019 21:31:00 +0000 (UTC)
Subject: [Milsurplus] VFD for 3 ph 115vac at 400 cycles
References: <1784191172.2645931.1550007060496.ref@mail.yahoo.com>
Message-ID: <1784191172.2645931.1550007060496@mail.yahoo.com>

eBay item #?153068263501, seems cheap enough.??115 vac 60 cycle single phase input, 3 phase, 115 vac 400 cycle out.??
Has anyone tried using this or any other VFD to power aircraft radios?? Funny, could have sworn that only one was sold yesterday!Pitfalls?Jim
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From kb2vtl at gmail.com  Tue Feb 12 16:42:56 2019
From: kb2vtl at gmail.com (Peter Gottlieb)
Date: Tue, 12 Feb 2019 16:42:56 -0500
Subject: [Milsurplus] VFD for 3 ph 115vac at 400 cycles
In-Reply-To: <1784191172.2645931.1550007060496@mail.yahoo.com>
References: <1784191172.2645931.1550007060496.ref@mail.yahoo.com>
	<1784191172.2645931.1550007060496@mail.yahoo.com>
Message-ID: <6800391D-D34D-42CF-AE82-E80D80376702@gmail.com>

The waveforms are noisy on these so expect to need some LC filtering, but they work. 


Peter

> On Feb 12, 2019, at 4:31 PM, Jim Whartenby <antqradio at sbcglobal.net> wrote:
> 
> eBay item # 153068263501, seems cheap enough.  115 vac 60 cycle single phase input, 3 phase, 115 vac 400 cycle out.  
> 
> Has anyone tried using this or any other VFD to power aircraft radios?  Funny, could have sworn that only one was sold yesterday!
> Pitfalls?
> Jim
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From navy.radio at gmail.com  Tue Feb 12 16:48:45 2019
From: navy.radio at gmail.com (Nick England)
Date: Tue, 12 Feb 2019 16:48:45 -0500
Subject: [Milsurplus] VFD for 3 ph 115vac at 400 cycles
In-Reply-To: <6800391D-D34D-42CF-AE82-E80D80376702@gmail.com>
References: <1784191172.2645931.1550007060496.ref@mail.yahoo.com>
	<1784191172.2645931.1550007060496@mail.yahoo.com>
	<6800391D-D34D-42CF-AE82-E80D80376702@gmail.com>
Message-ID: <CAB55hNfyQTUB_WgoVZJ_3gyH_idEgRwq+sCam-pM2YVZYt-Esw@mail.gmail.com>

The VFDs I have looked at seriously do not like any sudden change of load.
Does anyone have experience with running a transmitter off these?
Nick England K4NYW
www.navy-radio.com


On Tue, Feb 12, 2019 at 4:43 PM Peter Gottlieb <kb2vtl at gmail.com> wrote:

> The waveforms are noisy on these so expect to need some LC filtering, but
> they work.
>
>
> Peter
>
> On Feb 12, 2019, at 4:31 PM, Jim Whartenby <antqradio at sbcglobal.net>
> wrote:
>
> eBay item # 153068263501, seems cheap enough.  115 vac 60 cycle single
> phase input, 3 phase, 115 vac 400 cycle out.
>
> Has anyone tried using this or any other VFD to power aircraft radios?
> Funny, could have sworn that only one was sold yesterday!
> Pitfalls?
> Jim
>
> ______________________________________________________________
> 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 <Milsurplus at mailman.qth.net>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From wa5cab at cs.com  Tue Feb 12 17:02:31 2019
From: wa5cab at cs.com (Robert Downs)
Date: Tue, 12 Feb 2019 16:02:31 -0600
Subject: [Milsurplus] BC-654 production
In-Reply-To: <MWHPR14MB1485F38CA2340CA90A1D2E97E4650@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB1485F38CA2340CA90A1D2E97E4650@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <00c501d4c31e$a7700a80$f6501f80$@com>

According to the Procurement section of the Statistics volume of the series
The United States Army In WW II, total production of SCR-284 between 1940
and 1945 was 63972.  The highest serial number that I have had was 62805,
which now belongs to Third Army (re-enactment group).  I corrected the
Wikipedia entry.  Time will tell whether it stays corrected.

Robert Downs


-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Hubert Miller
Sent: Tuesday, February 12, 2019 02:17
To: milsurplus at qth.net
Subject: [Milsurplus] BC-654 production

Wikipedia: 
Over 150,000 units were eventually produced in total. After the war, many
BC-654s were sold as surplus for $15 each. Today, many are restored and
operated by https://en.wikipedia.org/wiki/Vintage_amateur_radio
enthusiasts.https://en.wikipedia.org/wiki/SCR-284#cite_note-11 "

I don't think that 150k figure is right. I thought it was something north of
50K ?
-Hue 
______________________________________________________________
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 frledda at att.net  Tue Feb 12 18:03:25 2019
From: frledda at att.net (Francesco Ledda)
Date: Wed, 13 Feb 2019 00:03:25 +0100
Subject: [Milsurplus] VFD for 3 ph 115vac at 400 cycles
In-Reply-To: <CAB55hNfyQTUB_WgoVZJ_3gyH_idEgRwq+sCam-pM2YVZYt-Esw@mail.gmail.com>
References: <1784191172.2645931.1550007060496.ref@mail.yahoo.com>
	<1784191172.2645931.1550007060496@mail.yahoo.com>
	<6800391D-D34D-42CF-AE82-E80D80376702@gmail.com>
	<CAB55hNfyQTUB_WgoVZJ_3gyH_idEgRwq+sCam-pM2YVZYt-Esw@mail.gmail.com>
Message-ID: <94537642-21C1-485D-83D5-D2380FF27288@att.net>

I had load change problems with an Hitachi VFD. The programming manual was very cryptic;  there is a chance  that with the proper programming, it would have worked well with variable loads. There may be other brands that may be less susceptible to load variations. 

I know have a 5kW SS 3-phase inverter that is awesome!

Sent from my iPhone

> On Feb 12, 2019, at 22:48, Nick England <navy.radio at gmail.com> wrote:
> 
> The VFDs I have looked at seriously do not like any sudden change of load. 
> Does anyone have experience with running a transmitter off these?
> Nick England K4NYW
> www.navy-radio.com
> 
> 
>> On Tue, Feb 12, 2019 at 4:43 PM Peter Gottlieb <kb2vtl at gmail.com> wrote:
>> The waveforms are noisy on these so expect to need some LC filtering, but they work. 
>> 
>> 
>> Peter
>> 
>>> On Feb 12, 2019, at 4:31 PM, Jim Whartenby <antqradio at sbcglobal.net> wrote:
>>> 
>>> eBay item # 153068263501, seems cheap enough.  115 vac 60 cycle single phase input, 3 phase, 115 vac 400 cycle out.  
>>> 
>>> Has anyone tried using this or any other VFD to power aircraft radios?  Funny, could have sworn that only one was sold yesterday!
>>> Pitfalls?
>>> Jim
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From jcaldwell at rbcos.com  Tue Feb 12 18:17:13 2019
From: jcaldwell at rbcos.com (John P. Caldwell)
Date: Tue, 12 Feb 2019 18:17:13 -0500
Subject: [Milsurplus] VFD for 3 ph 115vac at 400 cycles
Message-ID: <009601d4c329$17460fd0$45d22f70$@rbcos.com>

Don't get ahead of yourselves here, I don't think this is going to work as
you'd like.  3 phase VFD's are intended for motor speed control and as Nick
observed, don't deal with load changes instantaneously.  For example, in the
scenario where you try using one to supply power to a 618T-2 aircraft
transceiver, the transformers in the radios power supply will go into
saturation when the output frequency of the VFD sags due to load peaks.
Even for a millisecond, if the frequency drops, the power supply will shut
down.  It might be possible to use a large motor to act in a stabilizing
role to buffer the VFD's load and stabilize the frequency, but I can't say
for sure.   Then there's the square wave output issue to deal with as well,
VFD's don't make clean waveforms.  Expect lots of line noise as Peter
pointed out.

 

John

WD8INC

 

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From rpmeadow at bellsouth.net  Tue Feb 12 19:04:11 2019
From: rpmeadow at bellsouth.net (Robert P. Meadows)
Date: Tue, 12 Feb 2019 19:04:11 -0500
Subject: [Milsurplus] VFD for 3 ph 115vac at 400 cycles
In-Reply-To: <009601d4c329$17460fd0$45d22f70$@rbcos.com>
References: <009601d4c329$17460fd0$45d22f70$@rbcos.com>
Message-ID: <056501d4c32f$a6e016d0$f4a04470$@bellsouth.net>

Folks, keep searching for solid state 115v 400cps, or as I did, a rather
large MG Set that makes enough 115v3ph400cps to run about four 618T/628T.

R

 

From: milsurplus-bounces at mailman.qth.net
<milsurplus-bounces at mailman.qth.net> On Behalf Of John P. Caldwell
Sent: Tuesday, February 12, 2019 6:17 PM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] VFD for 3 ph 115vac at 400 cycles

 

Don't get ahead of yourselves here, I don't think this is going to work as
you'd like.  3 phase VFD's are intended for motor speed control and as Nick
observed, don't deal with load changes instantaneously.  For example, in the
scenario where you try using one to supply power to a 618T-2 aircraft
transceiver, the transformers in the radios power supply will go into
saturation when the output frequency of the VFD sags due to load peaks.
Even for a millisecond, if the frequency drops, the power supply will shut
down.  It might be possible to use a large motor to act in a stabilizing
role to buffer the VFD's load and stabilize the frequency, but I can't say
for sure.   Then there's the square wave output issue to deal with as well,
VFD's don't make clean waveforms.  Expect lots of line noise as Peter
pointed out.

 

John

WD8INC

 

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From r390a.urr at gmail.com  Thu Feb 14 10:23:03 2019
From: r390a.urr at gmail.com (Dave Merrill)
Date: Thu, 14 Feb 2019 09:23:03 -0600
Subject: [Milsurplus] Estate Sale: Cumming, GA
Message-ID: <CAGRTi8Uo+mzJoeg0Fiw0yZ9RGpPHChsXc-pA8t_EWODQ6J3F=g@mail.gmail.com>

https://www.estatesales.net/GA/Cumming/30040/2118198

Lotsa good stuff, way too far for me.  Starts Friday, Feb 15th.

Most of the radio photos are near the end.
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From RAFANTINI at salisbury.edu  Thu Feb 14 10:51:53 2019
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Thu, 14 Feb 2019 15:51:53 +0000
Subject: [Milsurplus] 90 days to Dayton
Message-ID: <460f9de951d14c27be9a028cb2ae9fc5@EXCHMBX01.salisbury.edu>

We are a little over ninety days until the Dayton, or is it now Xenia Hamvention. Just went ahead and paid for my two spaces 7839 and 7939 and that was a quick $140 for that, $22.00 for an admission ticket and will also be shelling out for a hotel up in Springfield that will be over $140 a night that any other time of the year rents for $70 and have to say that I am a little concerned looking at the list of reserved flee market spaces on

https://info.pcboard.ca/hamvention/

I see a little over one hundred of the just over six hundred spaces not taken. Think this means that roughly one out of every six flee market spaces are open and not rented. That not including any people who were there last year and may not show up this year, the Hamvention automatically renew your listing from last year in the same space and it's up to you to pay and attend. Don't know at what point they declare it an open space.

The venue, concessions and everything about the location is far better than the hole that was Harra Arena with its pot holed excuse of a parking lot, septic system eruptions and dark dilapidated buildings and they did do a better job controlling the mud last year in the infield but have to wonder about the future of the Hamvention.

One thing I have to say is that I do a lot of selling at Ham fest, many items that are too big and just don't want to be dealing with EBay and all the issues with shipping, fees and a lot of the flakes that buy stuff on EBay and as fest go I always make the most money at Dayton and tend to be able to sell things like truckloads of R-390 receivers or KWM-2A sets that just don't sell at the smaller fest but if things keep going in the same direction just can't see much of a future in selling there with what it cost to attend.

Don't know, maybe it's just me but the thing that gets me the most is that all the Hotels in Dayton / Springfield at least double if not more there rate for the Hamvention. When you book online you can see their current rates and when you put the dates in for the Hamvention they at least double. The quality of the service is the same but you get to pay twice as much. Think the hotel the Collins collectors stay in now is over $200 per night in Fairborn. I use to stay in Fairborn but now find Springfield just as good, ten years ago the Springfield hotels did not do the double rate thing but today it looks like they all do.
Use to stay at the Quality Inn just off I-70 and they are currently $65 a night and they only jump up to $95 but that place was somewhat of an experience.

All that aside looking forward to the 51.0 Cold War Net and the 3.885 WW2 Net at the Hamvention. Still the one place where you can see more working BC-611 sets in use than anywhere else in the world and one of the best opportunities to net with not only US equipment from as early as BC-1000 sets to some of the most modern radios but also work German, Russian and any number of other nations radios on 51.0
In the last couple years MRCA has been growing its field exercises at Gilbert and this last year we had a lot going on at Beltsville but still think the number of participating backpack and portable radios at Dayton is the largest event of its type.

Ray F/KA3EKH

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From k7sz at live.com  Thu Feb 14 13:19:41 2019
From: k7sz at live.com (Rich Arland)
Date: Thu, 14 Feb 2019 18:19:41 +0000
Subject: [Milsurplus] Estate Sale: Cumming, GA
In-Reply-To: <CAGRTi8Uo+mzJoeg0Fiw0yZ9RGpPHChsXc-pA8t_EWODQ6J3F=g@mail.gmail.com>
References: <CAGRTi8Uo+mzJoeg0Fiw0yZ9RGpPHChsXc-pA8t_EWODQ6J3F=g@mail.gmail.com>
Message-ID: <CY4PR0501MB379604A9387523DD93D26E05F6670@CY4PR0501MB3796.namprd05.prod.outlook.com>

It figures.....the sale is right around the corner from me and I am severely lacking funds!!! Looks like a nice PRC-74/w charging stand, among a lot of other great stuff.

Vy 73 es gud DX!

Rich Arland   K7SZ   WPE7BYR
Radio/electronics archaeologist
Author: The ARRL's Low Power Communications
Bent Dipole Ranch, Dacula, GA
http://commobunker.blogspot.com/



________________________________
From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> on behalf of Dave Merrill <r390a.urr at gmail.com>
Sent: Thursday, February 14, 2019 10:23 AM
To: Military Surplus net List
Subject: [Milsurplus] Estate Sale: Cumming, GA

https://www.estatesales.net/GA/Cumming/30040/2118198

Lotsa good stuff, way too far for me.  Starts Friday, Feb 15th.

Most of the radio photos are near the end.
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From kargo_cult at msn.com  Thu Feb 14 15:36:21 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Thu, 14 Feb 2019 20:36:21 +0000
Subject: [Milsurplus] What radio is this ?
Message-ID: <MWHPR14MB1485D1DB271BB6930265EB24E4670@MWHPR14MB1485.namprd14.prod.outlook.com>

What radio is this ?  ( From Cummings GA sale. )
tnx-  Hue

[cid:image001.jpg at 01D4C461.E11C3120]
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From murphy at cts.com  Thu Feb 14 15:39:55 2019
From: murphy at cts.com (mike murphy)
Date: Thu, 14 Feb 2019 12:39:55 -0800
Subject: [Milsurplus] Milsurplus Digest, Vol 178, Issue 21
In-Reply-To: <mailman.2355.1550176588.2818.milsurplus@mailman.qth.net>
References: <mailman.2355.1550176588.2818.milsurplus@mailman.qth.net>
Message-ID: <DE1370CB-EFBC-4ECA-ADAA-4910D85323A8@cts.com>

cs:
> 
>   1. What radio is this ? (Hubert Miller)

r-442/vrc
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Thu, 14 Feb 2019 20:36:21 +0000
> From: Hubert Miller <kargo_cult at msn.com>
> To: "milsurplus at qth.net" <milsurplus at qth.net>
> Subject: [Milsurplus] What radio is this ?
> Message-ID:
> 	<MWHPR14MB1485D1DB271BB6930265EB24E4670 at MWHPR14MB1485.namprd14.prod.outlook.com>
> 	
> Content-Type: text/plain; charset="us-ascii"
> 
> What radio is this ?  ( From Cummings GA sale. )
> tnx-  Hue
> 
> [cid:image001.jpg at 01D4C461.E11C3120]
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> 
> ------------------------------
> 
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> 
> End of Milsurplus Digest, Vol 178, Issue 21
> *******************************************
> 


MURPHY'S SURPLUS WAREHOUSE
401 NORTH JOHNSON AVE
 EL CAJON, CA. 92020

 619 444-7717 (VOICE)

 FAX (619) 444-6750 (24 hour)


MURPHY at CTS.COM <mailto:MURPHY at CTS.COM>

 HOURS: M-F 9-5 SAT. 9-5 CLOSED SUNDAY

 *********NEW WEB SITE LOCATION   http://www.murphyjunk.net/ <http://www.murphyjunk.net/>   **********

Goals are deceptive. The unaimed arrow never misses.

"The chains of habits are too light to be felt until they are too heavy to be broken."

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From kargo_cult at msn.com  Thu Feb 14 16:27:25 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Thu, 14 Feb 2019 21:27:25 +0000
Subject: [Milsurplus] TBS, MBF crystals ?
Message-ID: <MWHPR14MB148515EE5FFFCB66CA6C39B0E4670@MWHPR14MB1485.namprd14.prod.outlook.com>

Someone with a memory for arcane details know this ?
Crystals for the TBS, will they also fit the MBF ? Do they use same multiplication, so one crystal yields same channel on both ?
Thanks. ( Have 3 TBS crystals to move out. ) ( "V Cut" for Victory. )
-Hue
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From kargo_cult at msn.com  Thu Feb 14 16:31:20 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Thu, 14 Feb 2019 21:31:20 +0000
Subject: [Milsurplus] SMECC, write me
Message-ID: <MWHPR14MB1485D23ABFD501CB6AE4D00BE4670@MWHPR14MB1485.namprd14.prod.outlook.com>

I cannot find in my email a discussion of an item that interested you.
Reply to me, not group.
tnx, Hue
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From navy.radio at gmail.com  Thu Feb 14 18:05:18 2019
From: navy.radio at gmail.com (Nick England)
Date: Thu, 14 Feb 2019 18:05:18 -0500
Subject: [Milsurplus] TCS-5 manual on eBay
Message-ID: <CAB55hNd-8kJiUCqmOv6HFT8-ZaNCFJ-fXBvs28Ccb_OmcCtZmA@mail.gmail.com>

https://www.ebay.com/itm/372599872763
Not mine, etc.
But it is interesting to see an early manual with a Lend-Lease contract
number. And the components all have Collins ID - 56Q xmtr, 51Q rcvr, 409M
p/s, etc.
Nick England K4NYW
www.navy-radio.com
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From polarispair at gmail.com  Thu Feb 14 18:52:22 2019
From: polarispair at gmail.com (Mike And Patti Harris)
Date: Thu, 14 Feb 2019 17:52:22 -0600
Subject: [Milsurplus] What radio is this
Message-ID: <FDC327B8-1CB3-4353-836D-EC3FA53883E5@gmail.com>

Two R-442 receivers 30-75 MHz 
With canvas covers 

Joe KF5RKS 

Sent from my iPhone

From kk5f at earthlink.net  Thu Feb 14 19:04:39 2019
From: kk5f at earthlink.net (Mike Morrow)
Date: Thu, 14 Feb 2019 18:04:39 -0600 (GMT-06:00)
Subject: [Milsurplus] What radio is this ?
Message-ID: <277088633.19751.1550189079422@wamui-fatboy.atl.sa.earthlink.net>

Hue asked:

> What radio is this ?  ( From Cummings GA sale. ) 

Those are R-442*/VRC tactical VHF-FM receivers, which are next to either an RT-246*/VRC or RT-524*/VRC receiver-transmitters.

They are part of the AN/VRC-12-series, in US service from 1961 to 2008, almost 48 years.  It was THE tactical VHF-FM system used during the Vietnam war, used in nearly every ground and riverine craft.

  https://en.wikipedia.org/wiki/AN/VRC-12

Mike / KK5F

From farmer.rob.flory at gmail.com  Thu Feb 14 20:39:55 2019
From: farmer.rob.flory at gmail.com (Rob Flory)
Date: Thu, 14 Feb 2019 20:39:55 -0500
Subject: [Milsurplus] TBS and MBF crystals
Message-ID: <CAFcNxxV02k90aQPZGgbaNQ+fmA67_RR-xtDQOJbWAVjjMwskSw@mail.gmail.com>

Yes they are interchangeable.
RF
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From kargo_cult at msn.com  Fri Feb 15 02:41:39 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Fri, 15 Feb 2019 07:41:39 +0000
Subject: [Milsurplus] Hey Robert Goff
Message-ID: <CY4PR14MB1479F87DC20D0E559FA9D83FE4600@CY4PR14MB1479.namprd14.prod.outlook.com>

Write me about Rickreall, before Saturday !
-Hue Miller
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From briankn4r at gmail.com  Fri Feb 15 09:35:34 2019
From: briankn4r at gmail.com (Brian Harrison)
Date: Fri, 15 Feb 2019 09:35:34 -0500
Subject: [Milsurplus] looking for R-390 and -A meters
Message-ID: <065A0507-8937-45E9-95E9-BF09003994BD@gmail.com>

Hi all,

I?ve come into a few R-390s and -As with no meters

Would anyone on the list have any for sale?  Or know of a quantity source?

Tnx and please email me off list

briankn4r at gmail.com <mailto:briankn4r at gmail.com>

(also I?m good on QRZ)

Tnx and all the best,

brian
kn4r
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From antqradio at sbcglobal.net  Fri Feb 15 14:50:30 2019
From: antqradio at sbcglobal.net (Jim Whartenby)
Date: Fri, 15 Feb 2019 19:50:30 +0000 (UTC)
Subject: [Milsurplus] looking for R-390 and -A meters
In-Reply-To: <065A0507-8937-45E9-95E9-BF09003994BD@gmail.com>
References: <065A0507-8937-45E9-95E9-BF09003994BD@gmail.com>
Message-ID: <146614243.1716756.1550260230450@mail.yahoo.com>

BrianA VU meter is a VU meter so if it fits, it is good to go.
The Carrier Level meter is a different story.? I have used meters from other military radios as replacements.? The meters used are the same physical size and appearance of the original Collins meters so if you didn't know beforehand, I doubt that you would notice any difference.??
Here is a note from 2006 by Pete Williams from "the land down under" on the procedure to go from the original 10 ohm meter movement to one that uses a 100 ohm / 1 mA meter movement.
"Hi...While some of you guys have been getting legless from taking theplate caps off 807's, some of us at the other end of the day havebeen active in being practical in adapting surplus meters for thecarrier level function in R-390A.

Theoriginal meter has an internal R of around 10 Ohms and thereplacement meter I have (ex W5cab) has an Internal R of around 103ohms. It has a FSD of 1 mA. The scale plate changed per fotodetails available on the net.


Altho'it deflects, the reading is a fraction of the original. Followingsuggestions made by David Wise and Gary Gitzen, modifications made tothe meter bridge circuit gave identical results to that generatedwith original meters.


Notonly was meter deflection approximately the same (Even readings fromoriginal meters varied under the same test conditions) but theparameters of linearity and AGC also remained identical to readingsobtained with the original meters during the tests . Time constantvalues also appeared to be the same as original.


MODIFICATION: Refer to Fig 22 on page 36 of manual TM 11-5820-358-35.


ReplaceR524 with a 600 ohm resistor. Replace R548 with a 160 ohm resistor .Both are easy to get at.

RemoveR537 a 22 ohm resistor from the carrier meter adjust pot ..


Removethe shorting link from the center wiper terminal of this pot andconnect the white-blue-orange wire to the "hot end" of thepot. The white-blue-green stays on the center wiper and it isalready connected to the + side of meter, M102. The white wire staysgoing to chassis. Zero the meter as per the manual and that's it .


NOTE....other meters of greatly differing IR's may require modification ofthe resistor values... none were available for test.

Thanksto Dave and Gary for interest and assistance with thesemodifications.
Puristscan get on with evacuating 807's!
CheersPeteD . WilliamsMETUNG3904?Australiajupete at bigpond.net.au"
I have used the above procedure with great success on several R-390As.? The meters I used were from several SRR-13 receivers that had I scrapped due to physical, smoke and fire damage.? Most of these receivers were missing modules and would have required much more effort to bring back to life then I was willing to expend.? The more complete receivers I have repaired or have saved for a rainy day.? The SRR/FRR series of receivers are good performers and don't deserve the reputation they seem to have, IMHO.? Plus the fact that they used mechanical filters, long before the non-A R-390 receiver entered inventory.

If you cannot find appropriate meters, let me know and I'll check my box of SRR/FRR spare parts for meter sets.Regards,Jim
I wonder why people argue over the 10% of their differences and ignore the 90% they agree on? 

    On Friday, February 15, 2019, 8:35:45 AM CST, Brian Harrison <briankn4r at gmail.com> wrote:  
 
 Hi all,
I?ve come into a few R-390s and -As with no meters
Would anyone on the list have any for sale? ?Or know of a quantity source?
Tnx and please email me off list
briankn4r at gmail.com
(also I?m good on QRZ)
Tnx and all the best,
briankn4r______________________________________________________________
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 wa5cab at cs.com  Fri Feb 15 15:47:11 2019
From: wa5cab at cs.com (Robert Downs)
Date: Fri, 15 Feb 2019 14:47:11 -0600
Subject: [Milsurplus] looking for R-390 and -A meters
In-Reply-To: <146614243.1716756.1550260230450@mail.yahoo.com>
References: <065A0507-8937-45E9-95E9-BF09003994BD@gmail.com>
	<146614243.1716756.1550260230450@mail.yahoo.com>
Message-ID: <008a01d4c56f$a091f9f0$e1b5edd0$@com>

I still have a fair number of the Weston 1011  1-3/4? square 0-1mA meters as described by Pete.  Price is still $15 plus shipping.   As Pete mentioned, the scale on these will need re-doing if you want actual numbers on it.

 

I have also sold these for use in other sets such as T-195 and R-392 but have had no feedback from anyone on how they adapted it electrically.

 

Robert Downs

 

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Jim Whartenby
Sent: Friday, February 15, 2019 13:51
To: milsurplus listserv
Subject: Re: [Milsurplus] looking for R-390 and -A meters

 

Brian

A VU meter is a VU meter so if it fits, it is good to go.

 

The Carrier Level meter is a different story.  I have used meters from other military radios as replacements  The meters used are the same physical size and appearance of the original Collins meters so if you didn't know beforehand, I doubt that you would notice any difference.  

 

Here is a note from 2006 by Pete Williams from "the land down under" on the procedure to go from the original 10 ohm meter movement to one that uses a 100 ohm / 1 mA meter movement.

 

"Hi... While some of you guys have been getting legless from taking the plate caps off 807's, some of us at the other end of the day have been active in being practical in adapting surplus meters for the carrier level function in R-390A.

The original meter has an internal R of around 10 Ohms and the replacement meter I have (ex W5cab) has an Internal R of around 103 ohms. It has a FSD of 1 mA. The scale plate changed per foto details available on the net.

Altho' it deflects, the reading is a fraction of the original. Following suggestions made by David Wise and Gary Gitzen, modifications made to the meter bridge circuit gave identical results to that generated with original meters.

Not only was meter deflection approximately the same (Even readings from original meters varied under the same test conditions) but the parameters of linearity and AGC also remained identical to readings obtained with the original meters during the tests . Time constant values also appeared to be the same as original.

MODIFICATION: Refer to Fig 22 on page 36 of manual TM 11-5820-358-35.

Replace R524 with a 600 ohm resistor. Replace R548 with a 160 ohm resistor . Both are easy to get at.

Remove R537 a 22 ohm resistor from the carrier meter adjust pot ..

Remove the shorting link from the center wiper terminal of this pot and connect the white-blue-orange wire to the "hot end" of the pot. The white-blue-green stays on the center wiper and it is already connected to the + side of meter, M102. The white wire stays going to chassis. Zero the meter as per the manual and that's it .

NOTE.... other meters of greatly differing IR's may require modification of the resistor values... none were available for test.

Thanks to Dave and Gary for interest and assistance with these modifications.

 

Purists can get on with evacuating 807's!

 

Cheers

Pete D . Williams

METUNG 3904 Australia

jupete at bigpond.net.au"

 

I have used the above procedure with great success on several R-390As.  The meters I used were from several SRR-13 receivers that had I scrapped due to physical, smoke and fire damage.  Most of these receivers were missing modules and would have required much more effort to bring back to life then I was willing to expend.  The more complete receivers I have repaired or have saved for a rainy day.  The SRR/FRR series of receivers are good performers and don't deserve the reputation they seem to have, IMHO.  Plus the fact that they used mechanical filters, long before the non-A R-390 receiver entered inventory.

 

If you cannot find appropriate meters, let me know and I'll check my box of SRR/FRR spare parts for meter sets.

Regards,

Jim

 

I wonder why people argue over the 10% of their differences and ignore the 90% they agree on?

 

 

On Friday, February 15, 2019, 8:35:45 AM CST, Brian Harrison <briankn4r at gmail.com> wrote: 

 

 

Hi all,

 

I?ve come into a few R-390s and -As with no meters

 

Would anyone on the list have any for sale?  Or know of a quantity source?

 

Tnx and please email me off list

 

briankn4r at gmail.com

 

(also I?m good on QRZ)

 

Tnx and all the best,

 

brian

kn4r

______________________________________________________________
Milsurplus mailing list
Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
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From kg2bz at comcast.net  Fri Feb 15 15:54:40 2019
From: kg2bz at comcast.net (comcast)
Date: Fri, 15 Feb 2019 15:54:40 -0500
Subject: [Milsurplus] speedx model 320 part needed
Message-ID: <BE373BFB-0193-4AF0-A804-F145F903D4D4@comcast.net>

folks. 
i need a part for the speedx model 320 manual key.  it is the lower sending contact mounted on the base. any ideas where i can get that?  
thanks. jeff. kg2bz
Sent from my iPhone

From bill.riches at gmail.com  Sat Feb 16 08:19:20 2019
From: bill.riches at gmail.com (bill riches)
Date: Sat, 16 Feb 2019 08:19:20 -0500
Subject: [Milsurplus] r-390a meters
Message-ID: <CALVPYiW7xSH+RcWMwBDGo3TEbUhJPyokV149Mzz2RxFeZzQ2CA@mail.gmail.com>

Hi Robert,

Do you have any of the weston 1011 meters left?

73,

Bill, WA2DVu
Cape May
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From briankn4r at gmail.com  Sat Feb 16 20:52:40 2019
From: briankn4r at gmail.com (Brian Harrison)
Date: Sat, 16 Feb 2019 20:52:40 -0500
Subject: [Milsurplus] meter for R-392 and T-195?
Message-ID: <AF82E875-0D2C-4CDB-BCDA-C7E98F4949A1@gmail.com>

All,

Anyone have any extra meters for a R-392 rx and T-195 xmtr?

I came across a depot-fresh pair today but neither have their meter..

Please contact me off list - briankn4r at gmail.com <mailto:briankn4r at gmail.com>

Thank you,

brian
kn4r


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From navyradiocom at gmail.com  Sat Feb 16 23:32:54 2019
From: navyradiocom at gmail.com (Tom Brent)
Date: Sat, 16 Feb 2019 20:32:54 -0800
Subject: [Milsurplus] R1155 Restoration Manual
Message-ID: <48195840-15CD-4227-A58F-6E3C551C0432@gmail.com>

Does anybody know if Peter Holtham's restoration manual for the British R1155 receiver is still available? I believe the 3rd edition was printed and available in Australia in 2017 but I cannot find anything more recent on it.

Regards to all.

Tom

Sent from my iPhone

From RAFANTINI at salisbury.edu  Sun Feb 17 13:34:44 2019
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Sun, 17 Feb 2019 18:34:44 +0000
Subject: [Milsurplus] AN/VSC-2 teletype
Message-ID: <1550428523241.66243@salisbury.edu>

In yet a new effort to move forward into the past I am attempting to get all of the teletype equipment functional with my GRC-106, yes as crazy as it sounds there was something called the AN/VSC-2 that was a GRC-106, MD-522 and a teletype machine all installed in a M151, and thru a series of unusual circumstances I happen to have all the bits for putting one together but don't think I will be going quite that far being it involves giving up almost all the back set and the passengers seat so I will stick with the stock GRC-106 installation on the mutt and maybe set the MD-522 and the UGC-74 up just outside.
So I pulled the UGC-74B out last night and cleaned it up and did all the regular checks and the like and that's working. Will be pulling the MD-522A today and cleaning that up and looking for all the cables and the one cable I appear to need now is the data cable for the back of the UGC-74 that's a type MS3112E 16-23 P connector. I can build the rest. I am also somewhat befuddled by what to do about the printer ribbon.  Anyone have any experience with dumping ink on these things?
A while back I tried to join the "Greenkeys" list but for some reason they did not accept me? Perhaps there requirements for association is beyond what the list are here. May have to try applying to that again but figure it won't hurt to ask around these reflectors first.

Ray F/KA3EKH

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From wrcromwell at gmail.com  Sun Feb 17 14:00:25 2019
From: wrcromwell at gmail.com (Bill Cromwell)
Date: Sun, 17 Feb 2019 14:00:25 -0500
Subject: [Milsurplus] AN/VSC-2 teletype
In-Reply-To: <1550428523241.66243@salisbury.edu>
References: <1550428523241.66243@salisbury.edu>
Message-ID: <53933ca7-9e32-0146-939a-aba1b5519b94@gmail.com>

Hi Ray,

I was on that list a number of years ago. I actually had a teletype 
machine that I was trying to get running, a TU and a radio of course. I 
never succeeded and eventually just dropped out. I found a new home for 
the TTY gear. If they are still active you should try again. While I was 
a member I found them very supportive. It may be they are no longer 
active. Or maybe just s  l  o  w.

I moved to "glass" rtty and have not looked back.

73,

Bill  KU8H

On 2/17/19 1:34 PM, Ray Fantini wrote:
> In yet a new effort to move forward into the past I am attempting to get 
> all of the teletype equipment functional with my GRC-106, yes as crazy 
> as it sounds there was something called the AN/VSC-2 that was a GRC-106, 
> MD-522 and a teletype machine all installed in a M151, and thru a series 
> of unusual circumstances I happen to have all the bits for putting one 
> together but don?t think I will be going quite that far being it 
> involves giving up almost all the back set and the passengers seat so I 
> will stick with the stock GRC-106 installation on the mutt and maybe set 
> the MD-522 and the UGC-74 up just outside.
> 
> So I pulled the UGC-74B out last night and cleaned it up and did all the 
> regular checks and the like and that?s working. Will be pulling the 
> MD-522A today and cleaning that up and looking for all the cables and 
> the one cable I appear to need now is the data cable for the back of the 
> UGC-74 that?s a type MS3112E 16-23 P connector. I can build the rest. I 
> am also somewhat befuddled by what to do about the printer ribbon.Anyone 
> have any experience with dumping ink on these things?
> 
> A while back I tried to join the ?Greenkeys? list but for some reason 
> they did not accept me? Perhaps there requirements for association is 
> beyond what the list are here. May have to try applying to that again 
> but figure it won?t hurt to ask around these reflectors first.
> 
> Ray?F/KA3EKH
> 
> 
> 
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> 

-- 
bark less - wag more

From kb2vtl at gmail.com  Sun Feb 17 14:07:26 2019
From: kb2vtl at gmail.com (Peter Gottlieb)
Date: Sun, 17 Feb 2019 14:07:26 -0500
Subject: [Milsurplus] AN/VSC-2 teletype
In-Reply-To: <53933ca7-9e32-0146-939a-aba1b5519b94@gmail.com>
References: <1550428523241.66243@salisbury.edu>
	<53933ca7-9e32-0146-939a-aba1b5519b94@gmail.com>
Message-ID: <08525bc3-c8a5-21a5-96b4-2a02d1749b99@gmail.com>

"Or maybe just s? l? o? w."

Well, they do operate machines that run at 45 Baud.


Peter
KB2VTL


On 2/17/2019 2:00 PM, Bill Cromwell wrote:
> Hi Ray,
>
> I was on that list a number of years ago. I actually had a teletype machine 
> that I was trying to get running, a TU and a radio of course. I never 
> succeeded and eventually just dropped out. I found a new home for the TTY 
> gear. If they are still active you should try again. While I was a member I 
> found them very supportive. It may be they are no longer active. Or maybe just 
> s l? o? w.
>
> I moved to "glass" rtty and have not looked back.
>
> 73,
>
> Bill? KU8H
>
> On 2/17/19 1:34 PM, Ray Fantini wrote:
>> In yet a new effort to move forward into the past I am attempting to get all 
>> of the teletype equipment functional with my GRC-106, yes as crazy as it 
>> sounds there was something called the AN/VSC-2 that was a GRC-106, MD-522 and 
>> a teletype machine all installed in a M151, and thru a series of unusual 
>> circumstances I happen to have all the bits for putting one together but 
>> don?t think I will be going quite that far being it involves giving up almost 
>> all the back set and the passengers seat so I will stick with the stock 
>> GRC-106 installation on the mutt and maybe set the MD-522 and the UGC-74 up 
>> just outside.
>>
>> So I pulled the UGC-74B out last night and cleaned it up and did all the 
>> regular checks and the like and that?s working. Will be pulling the MD-522A 
>> today and cleaning that up and looking for all the cables and the one cable I 
>> appear to need now is the data cable for the back of the UGC-74 that?s a type 
>> MS3112E 16-23 P connector. I can build the rest. I am also somewhat befuddled 
>> by what to do about the printer ribbon.Anyone have any experience with 
>> dumping ink on these things?
>>
>> A while back I tried to join the ?Greenkeys? list but for some reason they 
>> did not accept me? Perhaps there requirements for association is beyond what 
>> the list are here. May have to try applying to that again but figure it won?t 
>> hurt to ask around these reflectors first.
>>
>> Ray?F/KA3EKH
>>
>>
>>
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>


From kb8tq at n1k.org  Sun Feb 17 14:11:51 2019
From: kb8tq at n1k.org (Bob kb8tq)
Date: Sun, 17 Feb 2019 14:11:51 -0500
Subject: [Milsurplus] AN/VSC-2 teletype
In-Reply-To: <08525bc3-c8a5-21a5-96b4-2a02d1749b99@gmail.com>
References: <1550428523241.66243@salisbury.edu>
	<53933ca7-9e32-0146-939a-aba1b5519b94@gmail.com>
	<08525bc3-c8a5-21a5-96b4-2a02d1749b99@gmail.com>
Message-ID: <9194A23F-108E-4A41-A7F2-CF6D63B50ACF@n1k.org>

Hi

Greenkeys is very much alive and well these days. It?s at least as active as this list. No idea why they 
would not ?accept? anybody or everybody who tried to join. They ?.errr ? allowed me in :)

Bob
KB8TQ

> On Feb 17, 2019, at 2:07 PM, Peter Gottlieb <kb2vtl at gmail.com> wrote:
> 
> "Or maybe just s  l  o  w."
> 
> Well, they do operate machines that run at 45 Baud.
> 
> 
> Peter
> KB2VTL
> 
> 
> On 2/17/2019 2:00 PM, Bill Cromwell wrote:
>> Hi Ray,
>> 
>> I was on that list a number of years ago. I actually had a teletype machine that I was trying to get running, a TU and a radio of course. I never succeeded and eventually just dropped out. I found a new home for the TTY gear. If they are still active you should try again. While I was a member I found them very supportive. It may be they are no longer active. Or maybe just s l  o  w.
>> 
>> I moved to "glass" rtty and have not looked back.
>> 
>> 73,
>> 
>> Bill  KU8H
>> 
>> On 2/17/19 1:34 PM, Ray Fantini wrote:
>>> In yet a new effort to move forward into the past I am attempting to get all of the teletype equipment functional with my GRC-106, yes as crazy as it sounds there was something called the AN/VSC-2 that was a GRC-106, MD-522 and a teletype machine all installed in a M151, and thru a series of unusual circumstances I happen to have all the bits for putting one together but don?t think I will be going quite that far being it involves giving up almost all the back set and the passengers seat so I will stick with the stock GRC-106 installation on the mutt and maybe set the MD-522 and the UGC-74 up just outside.
>>> 
>>> So I pulled the UGC-74B out last night and cleaned it up and did all the regular checks and the like and that?s working. Will be pulling the MD-522A today and cleaning that up and looking for all the cables and the one cable I appear to need now is the data cable for the back of the UGC-74 that?s a type MS3112E 16-23 P connector. I can build the rest. I am also somewhat befuddled by what to do about the printer ribbon.Anyone have any experience with dumping ink on these things?
>>> 
>>> A while back I tried to join the ?Greenkeys? list but for some reason they did not accept me? Perhaps there requirements for association is beyond what the list are here. May have to try applying to that again but figure it won?t hurt to ask around these reflectors first.
>>> 
>>> Ray F/KA3EKH
>>> 
>>> 
>>> 
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> 
>> 
> 
> ______________________________________________________________
> 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 glennmaillist at bellsouth.net  Sun Feb 17 14:47:43 2019
From: glennmaillist at bellsouth.net (Glenn Little WB4UIV)
Date: Sun, 17 Feb 2019 14:47:43 -0500
Subject: [Milsurplus] AN/VSC-2 teletype
In-Reply-To: <1550428523241.66243@salisbury.edu>
References: <1550428523241.66243@salisbury.edu>
Message-ID: <7f3a0fe3-d8d9-1820-af8b-a0cf2c9c294a@bellsouth.net>

When I reinked TTY ribbons I placed a few drops of stamp pad ink on the 
ribbon near the center of the spool and let it sit a few days.
If the outside of the spool was still dry, I put a few more drops in the 
center of the spool.
The idea is that the ink will migrate through out the ribbon.
You could make a reinker.
There was one commercially available about 20 years ago.
You would place the supply and take up spools on the reinker and it 
would pull the ribbon past a felt that was inked.

I guess you know that a few drops of WD-40 (the most misused liquid on 
the planet) cam rejuvenate a dry ribbon.


Hope this helps.

73
Glenn
WB4UIV

On 2/17/2019 1:34 PM, Ray Fantini wrote:
>
> In yet a new effort to move forward into the past I am attempting to 
> get all of the teletype equipment functional with my GRC-106, yes as 
> crazy as it sounds there was something called the AN/VSC-2 that was a 
> GRC-106, MD-522 and a teletype machine all installed in a M151, and 
> thru a series of unusual circumstances I happen to have all the bits 
> for putting one together but don???t think I will be going quite that 
> far being it involves giving up almost all the back set and the 
> passengers seat so I will stick with the stock GRC-106 installation on 
> the mutt and maybe set the MD-522 and the UGC-74 up just outside.
>
> So I pulled the UGC-74B out last night and cleaned it up and did all 
> the regular checks and the like and that???s working. Will be pulling 
> the MD-522A today and cleaning that up and looking for all the cables 
> and the one cable I appear to need now is the data cable for the back 
> of the UGC-74 that???s a type MS3112E 16-23 P connector. I can build the 
> rest. I am also somewhat befuddled by what to do about the printer 
> ribbon.Anyone have any experience with dumping ink on these things?
>
> A while back I tried to join the ???Greenkeys??? list but for some reason 
> they did not accept me? Perhaps there requirements for association is 
> beyond what the list are here. May have to try applying to that again 
> but figure it won???t hurt to ask around these reflectors first.
>
> Ray???F/KA3EKH
>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE 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 kargo_cult at msn.com  Sun Feb 17 20:05:28 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 01:05:28 +0000
Subject: [Milsurplus] Rickreall hamfest Feb. 16 2019
Message-ID: <MWHPR14MB1485C5465795B58E70B6B4D9E4630@MWHPR14MB1485.namprd14.prod.outlook.com>

I guess I tend to prolix and I hope at least some topic I hit on below holds interest to some of the audiences I have sent this to.

It was good seeing at  Rickreall some NWVRS folks and other people I know.
There were some vacant tables. Someone told me that was from tables not selling out this year but this morning I think that is wrong,
as I know one guy who said he could not get a table, was too late. BTW the same fellow planned to attend but driving from Grant's Pass
he was stuck in snow on road and could neither advance nor return to Grant's Pass; he spent the night in his car. What fun !
I stayed the day in the valley and brought back a bunch of interesting paper things to decide keep or put on Ebay. Things like QSL
collections from the 1930s, old radio company catalogs, and some early movie memorabilia. I found a 'Spokane Radio Company'
catalog 1938 and I tell you, it puts to shame any Allied or Lafayette catalog until the 1950s, it is that large. Maybe WW2 did in
Spokane's dreams of becoming a power player in the industry and maybe, I'm thinking, Spokane was a less than ideal location for
a radio electronics distributor. I was curious whether the catalog would have any Spokane Radio produced radio equipment and
there was none. I wonder if they only got into manufacturing in WW2 when the distributor business declined.

I drove back over the coastal range after dark and there were only a very few minutes of wet snow swirling and no hotshot pickup
drivers wanting to go faster and tailgating, so it wasn't that enervating a drive. I'd had only 3 hours of sleep the night before tho,
so I was pretty tired when I got home. I found the next morning I'd parked in the wrong parking slot, two numbers off, and I had not
even noticed. Maybe the occupant of that parking space thinks I came home a little drunk.

I bought a Tek 2225 scope for $80. Pretty good shape, I think 50 MHz scope, enough for me and my projects right now.
My free stuff was thinned out quite a bit - making me happy. More free stuff coming !

I bought a Navy  RBM - HF receiver  with nicely homebuilt by John Bauman, AC supply - speaker. I could not resist at $50. He told me he had restored
the back, where someone had added switches or connectors or something. So instead of giving away the two RBM I decided I would first
use parts from them to "upgrade" further this one I bought. What's that they say, "It seemed a good idea at the time" ?

I noticed at the "Country Store" tables a couple BC-348. One looked stock and one had at least one added toggle switch. Both were tagged
$175. At the end of the show I saw that the better one was gone. I wondered if someone had really, I mean actually paid that. I saw no
sign anywhere "Or Make Offer".  Brad and I have found selling BC-348s is a hard sell at hamfests and after selling a couple really nice ones
for $100 I decided it was a wasted effort to try to convince the smaller hamfest market this represents a value; instead I'll put such items on Ebay.
The same tables had several lower-end Hallicrafters like S-40 and some more home-entertainment models ( like HR-## ? ) with onboard speaker.
These were all priced $120 - 175. I think no one's gonna pay that unless the radio looks like it just came from the factory. Of course all these were
still there at the end of the show.

Dan H. and I both keyed in on a box we immediately recognized as a Forest Service SPF. We cooled our heels there waiting for the table owner
to return so we could hear some price. After about 15 minutes the guy returned and informed us, "Oh, that's for display only".  He said he had
patched the side where someone had cut a hole to be able to swap transmit crystals and then had removed the ugly hammified paint job  and, he
said, paid good money for paint to match the specific original shade of grey. Looked pretty good. It was SPF model AB.
We were both also looking at a unique receiver, a Multi-Elmac PMR-7. I think the guy said he bought it off Ebay thinking it was a PMR-8, the hamband
mobile receiver, but when it arrived it was this thing instead. It was same package and knobs but - general coverage. The lower band was
100 kHz to 1600 kHz in one sweep. Yes, you read that right. That means it uses a high IF so the osc can cover the range required. This receiver went up
to something like 32 MHz. I am a sucker for gen cov receivers with lighted sliderule dials and this one was in perfect condition and ex-rare besides, and
all this for $75. But I really did not like the 0.1 - 1.6 in one band and I realized I would be very unhappy with NO bandspread knob and the general
coverage bands like 7 - 15 MHz for example, spread across a little dial range of about 4 inches, like some crappy "All Bands" cheap transistor radio
from the 1970s. No sale for me. But - it did sell, I see.

Robin Bartel  of Turner, OR was there as usual with his military display. He had two 1930s Army radios, the SCR-178 and the BC-228 transmitter of the
SCR-203 set. I told him he had one of the rarest things on earth right there: the central, power distribution unit from the SCR-203, that goes between
the transmitter and receiver. I had a BC-227 receiver once and sold it for $35; now I could kick myself for that shortsighted dumb move. After doing
that I saw at least two BC-228 transmitters go by, that I could have acquired. I still have the canvas carrier for mule-back transport of this radio set.
Robin also had a rather unique 2 - leather bags set for the SCR-194/195. One bag was for the radio, one for the battery, and these rested on opposite
sides of the mule, with a strap between them holding up the bags. I think he said these bags were nomenclatured  BG-32, is that right? This is not in the
manual.
Oh, yeah, I recall I also saw a BD-86 dynamotor in excellent condition. What is that for ?

Also had interesting talks with a couple fellows whose mission was "electronics rescue". They had saved substantial test equipment and so on from
being scrapped out at the recycler. These were estate lots whose new owners had transported the treasures of their relatives right to the recycle place.
The recycle was only interested in metal value, so disassembling to recover metal was work that they were only too pleased to get out of.
-Hue
















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From kk5f at earthlink.net  Sun Feb 17 20:48:13 2019
From: kk5f at earthlink.net (Mike Morrow)
Date: Sun, 17 Feb 2019 19:48:13 -0600 (GMT-06:00)
Subject: [Milsurplus] SCR-238-A BD-86-A
Message-ID: <2077563841.14783.1550454494080@wamui-marley.atl.sa.earthlink.net>

Hue wrote:

> I recall I also saw a BD-86 dynamotor in excellent condition.
> What is that for?

That's a rare one.  The BD-86-A is the 14 vdc dynamotor for the BC-307-A 10 watt A1/A2/A3 1500 to 8100 kHz aircraft transmitter, part of the 1936 GE SCR-238-A.  There aren't many parts for that set still around.

Mike Hanz has a BC-307-A and BD-86-A under restoration:

  http://aafradio.org/flightdeck/1935/BC-307-A.html

I bought a BC-307-A at the 2017 Birminghamfest for $200.

Mike / KK5F

From kargo_cult at msn.com  Sun Feb 17 21:08:06 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 02:08:06 +0000
Subject: [Milsurplus] SCR-238-A BD-86-A
In-Reply-To: <2077563841.14783.1550454494080@wamui-marley.atl.sa.earthlink.net>
References: <2077563841.14783.1550454494080@wamui-marley.atl.sa.earthlink.net>
Message-ID: <MWHPR14MB14857191C373B9C1DB9F42A9E4630@MWHPR14MB1485.namprd14.prod.outlook.com>

Well, you know what, doggone it anyway, I DO have a BC-307. I have not been too highly interested in it or gathering accessory items. Clearly I blew it.
Ah well.  But, in my semi-defense, I'd managed to get 3 hours sleep that night before getting up at 0430, and I was semi-tied to the table I had at the show.
-Hue

> Hue wrote:
> 
> > I recall I also saw a BD-86 dynamotor in excellent condition.
> > What is that for?
> 
> That's a rare one.  The BD-86-A is the 14 vdc dynamotor for the BC-307-A 10
> watt A1/A2/A3 1500 to 8100 kHz aircraft transmitter, part of the 1936 GE SCR-
> 238-A.  There aren't many parts for that set still around.
> 
> Mike Hanz has a BC-307-A and BD-86-A under restoration:
> Mike / KK5F

From kargo_cult at msn.com  Sun Feb 17 21:59:36 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 02:59:36 +0000
Subject: [Milsurplus] German CQ magazine 1949
Message-ID: <MWHPR14MB148576E4815DFF8F977985ABE4630@MWHPR14MB1485.namprd14.prod.outlook.com>

One of the things I found was a German ham magazine, "CQ - Zeitschrift fuer den Kurzwellen-Amateur", date 1949.
The cover shows a German ham's setup with an HRO receiver. The homebuilt transmitter has a bunch of meters of
various styles, clearly scrounged from other equipment. I was surprised on a couple accounts. One, that German
ham radio had already been allowed to restart, this when Germany was still occupation zones and many cities were
still much in ruins, and probably thousands of 'displaced persons' were still in 'DP camps', and thousands of German
POWs were still held in Russia. I am positive the Russian zone of  Germany did not allow ham radio, and I have my
doubts about the French zone.
Second, that a German ham had enough money to buy an HRO. I am pretty sure even by 1949 the surplus ones were
still  commanding a good price. Possibly this ham had some higher technical job which paid well. I think in this time the
inequality would have been worse, some people having  such technical jobs and some people surviving with the clothes
on their backs. There is another ham station pictured inside, DL1LH, and his is one of the top German WW2 receivers
plus what looks like a couple MWEc vehicle MF receivers. There are some basic projects inside and these use, as one
might expect, the German military general purpose pentode RV12P2000, which was much used in their vehicle and
aircraft radios.
The magazine is on newsprint paper, has few photos, and thin enough to remind one of the very early issues of our
own U.S.  'CQ' magazine.
-Hue Miller

[cid:image002.jpg at 01D4C6F2.EA03CD50]


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From kargo_cult at msn.com  Sun Feb 17 22:38:42 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 03:38:42 +0000
Subject: [Milsurplus] Mysteries
Message-ID: <MWHPR14MB1485D12A183404C513454458E4630@MWHPR14MB1485.namprd14.prod.outlook.com>

Now I am wondering about other mysteries of the universe, equally impenetrable.
Like, what happened to Ken Lakin's collection ?
Like, what happened to Col. William Howard's collection ?
Where did Howard's paper go ?
What has me thinking again about this, is I recovered some paper I got from him way back,
and had in storage since about 2002. For example, I found schematics for Japanese aircraft
radios 99-1, 99-3, and 99-5. I think what I got from him possibly barely scratched the surface
of the documents he had collected.

I found also this curiosity: in a mil-manual style cardboard cover, a copy of aviation aids for
the Pacific area, 1944. And some radio logs. But - it's all copies, altho the cover is right for
the period. I have no recollection of where I got that. But it is a VERY interesting look at
aircraft comms and navigation aid stations in the wartime Pacific.
-Hue
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From holden7471 at msn.com  Sun Feb 17 23:14:26 2019
From: holden7471 at msn.com (howard holden)
Date: Mon, 18 Feb 2019 04:14:26 +0000
Subject: [Milsurplus] German CQ magazine 1949
In-Reply-To: <MWHPR14MB148576E4815DFF8F977985ABE4630@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB148576E4815DFF8F977985ABE4630@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <BYAPR06MB42136D4FD3F29621CA4C1C32C4630@BYAPR06MB4213.namprd06.prod.outlook.com>

What model HRO is it Hue, can you tell? The HRO dates back to '35, so maybe he had it prior, and managed to keep it hidden from prying eyes?


Howie WB2AWQ

On 2/17/2019 6:59 PM, Hubert Miller wrote:
One of the things I found was a German ham magazine, "CQ ? Zeitschrift fuer den Kurzwellen-Amateur", date 1949.
The cover shows a German ham's setup with an HRO receiver. The homebuilt transmitter has a bunch of meters of
various styles, clearly scrounged from other equipment. I was surprised on a couple accounts. One, that German
ham radio had already been allowed to restart, this when Germany was still occupation zones and many cities were
still much in ruins, and probably thousands of 'displaced persons' were still in 'DP camps', and thousands of German
POWs were still held in Russia. I am positive the Russian zone of  Germany did not allow ham radio, and I have my
doubts about the French zone.
Second, that a German ham had enough money to buy an HRO. I am pretty sure even by 1949 the surplus ones were
still  commanding a good price. Possibly this ham had some higher technical job which paid well. I think in this time the
inequality would have been worse, some people having  such technical jobs and some people surviving with the clothes
on their backs. There is another ham station pictured inside, DL1LH, and his is one of the top German WW2 receivers
plus what looks like a couple MWEc vehicle MF receivers. There are some basic projects inside and these use, as one
might expect, the German military general purpose pentode RV12P2000, which was much used in their vehicle and
aircraft radios.
The magazine is on newsprint paper, has few photos, and thin enough to remind one of the very early issues of our
own U.S.  'CQ' magazine.
-Hue Miller

[cid:part1.D7C52451.D3AC4A89 at msn.com]





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Home: http://mailman.qth.net/mailman/listinfo/milsurplus
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From kargo_cult at msn.com  Sun Feb 17 23:26:40 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 04:26:40 +0000
Subject: [Milsurplus] German CQ magazine 1949
In-Reply-To: <BYAPR06MB42136D4FD3F29621CA4C1C32C4630@BYAPR06MB4213.namprd06.prod.outlook.com>
References: <MWHPR14MB148576E4815DFF8F977985ABE4630@MWHPR14MB1485.namprd14.prod.outlook.com>
	<BYAPR06MB42136D4FD3F29621CA4C1C32C4630@BYAPR06MB4213.namprd06.prod.outlook.com>
Message-ID: <MWHPR14MB148583351067BD58562EB1EAE4630@MWHPR14MB1485.namprd14.prod.outlook.com>

>What model HRO is it Hue, can you tell? The HRO dates back to '35, so maybe he had it prior, and managed to keep it hidden from prying eyes?

I sure cannot tell ! I had not thought of that possibility either. -H.

[cid:image001.jpg at 01D4C6FF.155A5A30]




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From holden7471 at msn.com  Sun Feb 17 23:45:14 2019
From: holden7471 at msn.com (howard holden)
Date: Mon, 18 Feb 2019 04:45:14 +0000
Subject: [Milsurplus] German CQ magazine 1949
In-Reply-To: <MWHPR14MB148583351067BD58562EB1EAE4630@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB148576E4815DFF8F977985ABE4630@MWHPR14MB1485.namprd14.prod.outlook.com>
	<BYAPR06MB42136D4FD3F29621CA4C1C32C4630@BYAPR06MB4213.namprd06.prod.outlook.com>
	<MWHPR14MB148583351067BD58562EB1EAE4630@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <BYAPR06MB42135F1D1724EF4D2251EFBDC4630@BYAPR06MB4213.namprd06.prod.outlook.com>

I'm thinking possibly 1938 ish? Looks like the meter may be the yellow instead of the earlier white, black tuning knob, rectangular name plate on the upper right, coil deck with black background on the charts. But very hard to definitively figure it.


Howie WB2AWQ

On 2/17/2019 8:26 PM, Hubert Miller wrote:

>What model HRO is it Hue, can you tell? The HRO dates back to '35, so maybe he had it prior, and managed to keep it hidden from prying eyes?

I sure cannot tell ! I had not thought of that possibility either. -H.

[cid:part1.D76A18DE.0301D319 at msn.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

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From kargo_cult at msn.com  Sun Feb 17 23:46:37 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 04:46:37 +0000
Subject: [Milsurplus] Ham ads DL - CQ 1949
Message-ID: <MWHPR14MB14857764BDD0054D2F08A1D8E4630@MWHPR14MB1485.namprd14.prod.outlook.com>

Inside the back cover of the German "CQ" magazine there are ads in the "HAM-Markt" section.
I naively am surprised at the variety of equipment already available surplus in 1949 Germany.
For examples:

W.S. No. 19 advertised as "sell cheaply"
Torn.E.b. pack receiver, 90 DM
BC-348 with speaker LS-3 and AC supply, DM 270
H2L/7 regenerative ship's receiver 20,000 - 14 meters  DM 140
BC-348 DM 160; power supply DM 38
Torn.E.b. without tubes, case, otherwise new DM 59 each
Schematics and data for SCR-522 and BC-375, DM 2.85 and DM 1.20
BC-611 without case  DM 50

-Hue Miller
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From kargo_cult at msn.com  Sun Feb 17 23:47:56 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 04:47:56 +0000
Subject: [Milsurplus] German CQ magazine 1949
In-Reply-To: <BYAPR06MB42135F1D1724EF4D2251EFBDC4630@BYAPR06MB4213.namprd06.prod.outlook.com>
References: <MWHPR14MB148576E4815DFF8F977985ABE4630@MWHPR14MB1485.namprd14.prod.outlook.com>
	<BYAPR06MB42136D4FD3F29621CA4C1C32C4630@BYAPR06MB4213.namprd06.prod.outlook.com>
	<MWHPR14MB148583351067BD58562EB1EAE4630@MWHPR14MB1485.namprd14.prod.outlook.com>
	<BYAPR06MB42135F1D1724EF4D2251EFBDC4630@BYAPR06MB4213.namprd06.prod.outlook.com>
Message-ID: <MWHPR14MB14850134533F34F01A012CADE4630@MWHPR14MB1485.namprd14.prod.outlook.com>

The German "HRO copy", KST, has grey finish, so surely not it.
-Hue 

From kargo_cult at msn.com  Mon Feb 18 01:37:03 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 06:37:03 +0000
Subject: [Milsurplus] Rickreall hamfest Feb. 16 2019
In-Reply-To: <016301d4c753$53e952c0$fbbbf840$@com>
References: <MWHPR14MB1485C5465795B58E70B6B4D9E4630@MWHPR14MB1485.namprd14.prod.outlook.com>
	<016301d4c753$53e952c0$fbbbf840$@com>
Message-ID: <MWHPR14MB1485784BCC6451093DA1E2B7E4630@MWHPR14MB1485.namprd14.prod.outlook.com>


>According to SIG 5-1, BG-32 is a tool roll.  I didn't look up the description.  But apparently not mule harness.

But SCR-194 and 195 are back pack sets about the same size as a TBY.  I can't imagine why they would have mule harness.

BD-86 is the Dynamotor for the BC-307, P/O SCR-238.  Associated receiver is early BC-224.  Pair or VT-62 or 801.  Roughly equivalent to the BC-223 on the ground.

Robert Downs

Think of leather boxes, heavy gauge leather, with very robust straps, one just larger than the radio and one sized similarly for the specific battery.
This was "mule mobile" radio. I have never seen this referenced anywhere.
At his place I also saw something like BC-1132 - not sure about this number - but looked exactly like BC-1306.
-Hue
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From wa5cab at cs.com  Mon Feb 18 01:59:07 2019
From: wa5cab at cs.com (Robert Downs)
Date: Mon, 18 Feb 2019 00:59:07 -0600
Subject: [Milsurplus] SCR-238-A BD-86-A
In-Reply-To: <2077563841.14783.1550454494080@wamui-marley.atl.sa.earthlink.net>
References: <2077563841.14783.1550454494080@wamui-marley.atl.sa.earthlink.net>
Message-ID: <017501d4c757$71689af0$5439d0d0$@com>

Receiver used was an early BC-224.  Control Box is BC-208-A.  I have a
manual, such as it is.

Robert Downs


-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Mike Morrow
Sent: Sunday, February 17, 2019 19:48
To: milsurplus at mailman.qth.net
Subject: [Milsurplus] SCR-238-A BD-86-A

Hue wrote:

> I recall I also saw a BD-86 dynamotor in excellent condition.
> What is that for?

That's a rare one.  The BD-86-A is the 14 vdc dynamotor for the BC-307-A 10
watt A1/A2/A3 1500 to 8100 kHz aircraft transmitter, part of the 1936 GE
SCR-238-A.  There aren't many parts for that set still around.

Mike Hanz has a BC-307-A and BD-86-A under restoration:

  http://aafradio.org/flightdeck/1935/BC-307-A.html

I bought a BC-307-A at the 2017 Birminghamfest for $200.

Mike / KK5F
______________________________________________________________
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Home: http://mailman.qth.net/mailman/listinfo/milsurplus
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Milsurplus at mailman.qth.net

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


From kargo_cult at msn.com  Mon Feb 18 02:52:30 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 07:52:30 +0000
Subject: [Milsurplus] WWII PREFLIGHT RADIO INSPECTION FOR FIGHTER AIRCRAFT
	77754
Message-ID: <MWHPR14MB1485354905E5775527E67D57E4630@MWHPR14MB1485.namprd14.prod.outlook.com>

Have you seen this ? Radio Mechanic checkout of radios in WW2 era P-47 fighter plane.
Geoff Fors alerted me to this.
Nice closeups of checkout of "Command Sets" equipment. I add also, for those not familiar,
the HF "Command Sets" were built in both black wrinkle finish and plain aluminum finish.
I saw only 1 at the Rickreall hamfest, a plain finish one, but without cabinet and front plugin
adapter - not real attractive to buyers.
-Hue

https://www.youtube.com/watch?v=9aEe362dWMw&feature=youtu.be

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From kargo_cult at msn.com  Mon Feb 18 03:17:45 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 08:17:45 +0000
Subject: [Milsurplus] Rickreall hamfest Feb. 16 2019
In-Reply-To: <019101d4c761$4371e5c0$ca55b140$@com>
References: <MWHPR14MB1485C5465795B58E70B6B4D9E4630@MWHPR14MB1485.namprd14.prod.outlook.com>
	<016301d4c753$53e952c0$fbbbf840$@com>
	<MWHPR14MB1485784BCC6451093DA1E2B7E4630@MWHPR14MB1485.namprd14.prod.outlook.com>
	<019101d4c761$4371e5c0$ca55b140$@com>
Message-ID: <MWHPR14MB148514CC0BADD73263CEF923E4630@MWHPR14MB1485.namprd14.prod.outlook.com>


>OK.  Unfortunately, there is no mention of them in TM 11-238.
BC-1132 is T-R Box for SCR-584 & 784 Radar.  Probably BC-1136, which was the radio part of SCR-694-AW, which was the pre-production prototype of the SCR-694-C and BC-1306.  Batteries were BA-37 and BA-38.  Was it painted white?  Or green?
Robert Downs

This thing was green; looked just like the BC-1306 unless you read the nameplate. If I recall, he also had some kind of antenna base for the SCR-694-AW, which was if I recall,
used as an antenna base, to be set down on the snow as an antenna base; but this example was missing some key part. ( Good luck finding it ! )
-Hue
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From kargo_cult at msn.com  Mon Feb 18 03:23:33 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 08:23:33 +0000
Subject: [Milsurplus] SCR-194, 195 mule pack bag, one side
Message-ID: <MWHPR14MB148562115C0C005FB25D27A5E4630@MWHPR14MB1485.namprd14.prod.outlook.com>

[cid:image001.jpg at 01D4C720.2C9992D0]
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From kargo_cult at msn.com  Mon Feb 18 03:26:29 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 18 Feb 2019 08:26:29 +0000
Subject: [Milsurplus] BC-1136
Message-ID: <MWHPR14MB148528E454A581E2D80D43C7E4630@MWHPR14MB1485.namprd14.prod.outlook.com>

[cid:image001.jpg at 01D4C720.95E37620]
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From kb8tq at n1k.org  Mon Feb 18 09:38:56 2019
From: kb8tq at n1k.org (Bob kb8tq)
Date: Mon, 18 Feb 2019 09:38:56 -0500
Subject: [Milsurplus] Ham ads DL - CQ 1949
In-Reply-To: <MWHPR14MB14857764BDD0054D2F08A1D8E4630@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB14857764BDD0054D2F08A1D8E4630@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <D483812B-CAB2-4C2D-924B-8776508D1B48@n1k.org>

HI

To whatever extent surplus radio gear showed up here in the US, it also showed up 
a *lot* in places like Europe. It was already over there lying around :)  The cost of 
packing it back up and hauling it home ?.. yikes ?.. Even more so when ?new in the
box? equivalents were sitting in warehouses ?back home?. 

Just how any of it went from ?government property? to ?in my basement? always is an 
interesting sort of question. One would guess that dumpster diving was one of many 
ways it happened ?. 

Bob


> On Feb 17, 2019, at 11:46 PM, Hubert Miller <Kargo_cult at msn.com> wrote:
> 
> Inside the back cover of the German "CQ" magazine there are ads in the "HAM-Markt" section.
> I naively am surprised at the variety of equipment already available surplus in 1949 Germany.
> For examples: 
>  
> W.S. No. 19 advertised as "sell cheaply"
> Torn.E.b. pack receiver, 90 DM
> BC-348 with speaker LS-3 and AC supply, DM 270
> H2L/7 regenerative ship's receiver 20,000 ? 14 meters  DM 140
> BC-348 DM 160; power supply DM 38
> Torn.E.b. without tubes, case, otherwise new DM 59 each
> Schematics and data for SCR-522 and BC-375, DM 2.85 and DM 1.20
> BC-611 without case  DM 50 
>  
> -Hue Miller 
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus <http://mailman.qth.net/mailman/listinfo/milsurplus>
> Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm>
> Post: mailto:Milsurplus at mailman.qth.net <mailto:Milsurplus at mailman.qth.net>
> 
> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
> Please help support this email list: http://www.qsl.net/donate.html <http://www.qsl.net/donate.html>
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From n4fs at eozinc.com  Mon Feb 18 09:49:46 2019
From: n4fs at eozinc.com (Mike Feher)
Date: Mon, 18 Feb 2019 09:49:46 -0500
Subject: [Milsurplus] Mysteries
In-Reply-To: <MWHPR14MB1485D12A183404C513454458E4630@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB1485D12A183404C513454458E4630@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <00d801d4c799$3173bfa0$945b3ee0$@eozinc.com>

With regard to Ken, as I recall he started selling a lot of his collection
on eBay once he found out he was ill. I got to know him fairly well as I met
him through work and he and his wife visited us here in NJ a few times. He
was a real gentleman and a very smart man. I have no idea about Bill's
collection. 73 - Mike 

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

848-245-9115

 

From: milsurplus-bounces at mailman.qth.net
<milsurplus-bounces at mailman.qth.net> On Behalf Of Hubert Miller
Sent: Sunday, February 17, 2019 10:39 PM
To: milsurplus at qth.net
Subject: [Milsurplus] Mysteries

 

Now I am wondering about other mysteries of the universe, equally
impenetrable.

Like, what happened to Ken Lakin's collection ?

Like, what happened to Col. William Howard's collection ?

Where did Howard's paper go ?

What has me thinking again about this, is I recovered some paper I got from
him way back,

and had in storage since about 2002. For example, I found schematics for
Japanese aircraft 

radios 99-1, 99-3, and 99-5. I think what I got from him possibly barely
scratched the surface

of the documents he had collected.

 

I found also this curiosity: in a mil-manual style cardboard cover, a copy
of aviation aids for 

the Pacific area, 1944. And some radio logs. But - it's all copies, altho
the cover is right for

the period. I have no recollection of where I got that. But it is a VERY
interesting look at 

aircraft comms and navigation aid stations in the wartime Pacific.

-Hue 

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From military1944 at aol.com  Mon Feb 18 11:32:50 2019
From: military1944 at aol.com (MWM)
Date: Mon, 18 Feb 2019 16:32:50 +0000 (UTC)
Subject: [Milsurplus] T1154 Big resistors
References: <785164499.1068825.1550507570544.ref@mail.yahoo.com>
Message-ID: <785164499.1068825.1550507570544@mail.yahoo.com>

If anyone is rebuilding a T1154 I have the big green R's from the rear.?
Pics at:??https://vintageradio.webs.com/
Contact me direct.?
cheers, Ben.

Military Wireless MuseumKidderminster, UK.Museum Web Site
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From kb2vtl at gmail.com  Mon Feb 18 13:39:55 2019
From: kb2vtl at gmail.com (Peter Gottlieb)
Date: Mon, 18 Feb 2019 13:39:55 -0500
Subject: [Milsurplus] [MRCA] AN/VSC-2 teletype
In-Reply-To: <858529682.1119277.1550515054841@mail.yahoo.com>
References: <hjrcfbtrn1pog5dl1707jc5o.1550438115800@comcast.net>
	<259F2AB6-3478-4CDF-91E3-8A1D40634924@aol.com>
	<CAGzJkdxhhWF0kyeHXiCKBZvLrke8qo6qM4oXFp4m_zurPwBXnw@mail.gmail.com>
	<CAGzJkdwdpKchyVXKJ=cG-xsLazY6fCzgpjNdQsS6NRCbUJ-Z4w@mail.gmail.com>
	<858529682.1119277.1550515054841@mail.yahoo.com>
Message-ID: <F6F39BFA-ECB1-4EDF-BE7A-0F6A0EE1356F@gmail.com>

Maybe some day we can have a QSO between ours!


Peter

> On Feb 18, 2019, at 1:37 PM, Kris Dawkins via MRCA <mrca at mailman.qth.net> wrote:
> 
>  I have your An/GRC-142, still collecting bits and pieces for it. 
> Chris Dawkins 
> KM4BJG 
> 
> On Monday, February 18, 2019, 1:28:23 PM EST, MilComm Guy <m38inmaine at gmail.com> wrote:
> 
> 
> I also have the cables, I ran my set stand alone before I purchased a shelter, then sadly sold it.  I was hoping to find the telelype and modem again.  It worked quite well, I still have the printout from my first contact, it was with another GRC-142 shelter in FL.
> <DSCN5024.JPG>
> 
> On Mon, Feb 18, 2019 at 1:16 PM MilComm Guy <m38inmaine at gmail.com> wrote:
> I have a NOS ribbon, I listed it previously for trade, I am looking for a nice H-140 headset.
> 
> On Sun, Feb 17, 2019 at 4:57 PM Mkdorney via MRCA <mrca at mailman.qth.net> wrote:
> Better solution that a 1/4 trailer. Also costs a lot more, however. Don?t know if the costs outweigh the benefits. 
> 
> Mark D. 
> 
> Sent from my iPhone
> 
>> On Feb 17, 2019, at 4:15 PM, Walt Skavinsky <walter.skavinsky at comcast.net> wrote:
>> 
>> You need a Dodge m37 and an S318 shelter make up your own grc122
>> 
>> Walt
>> 
>> here are only 1 0 types of people in this world... those who understand binary, and those who don't.
>> 
>> From: RAFANTINI at salisbury.edu
>> Sent: February 17, 2019 13:35
>> To: MRCA at mailman.qth.net; MMRCG at groups.io
>> Cc: milsurplus at mailman.qth.net
>> Subject: [MRCA] AN/VSC-2 teletype
>> 
>> In yet a new effort to move forward into the past I am attempting to get all of the teletype equipment functional with my GRC-106, yes as crazy as it sounds there was something called the AN/VSC-2 that was a GRC-106, MD-522 and a teletype machine all installed in a M151, and thru a series of unusual circumstances I happen to have all the bits for putting one together but don?t think I will be going quite that far being it involves giving up almost all the back set and the passengers seat so I will stick with the stock GRC-106 installation on the mutt and maybe set the MD-522 and the UGC-74 up just outside.
>> 
>> So I pulled the UGC-74B out last night and cleaned it up and did all the regular checks and the like and that?s working. Will be pulling the MD-522A today and cleaning that up and looking for all the cables and the one cable I appear to need now is the data cable for the back of the UGC-74 that?s a type MS3112E 16-23 P connector. I can build the rest. I am also somewhat befuddled by what to do about the printer ribbon.  Anyone have any experience with dumping ink on these things?
>> 
>> A while back I tried to join the ?Greenkeys? list but for some reason they did not accept me? Perhaps there requirements for association is beyond what the list are here. May have to try applying to that again but figure it won?t hurt to ask around these reflectors first.
>> 
>>  
>> 
>> Ray F/KA3EKH 
>> 
>> 
>> ______________________________________________________________
>> 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
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> <DSCN5024.JPG>
> ______________________________________________________________
> MRCA mailing list
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> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MRCA at mailman.qth.net
> 
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From RAFANTINI at salisbury.edu  Mon Feb 18 13:42:09 2019
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Mon, 18 Feb 2019 18:42:09 +0000
Subject: [Milsurplus] [MRCA] AN/VSC-2 teletype
In-Reply-To: <CAGzJkdwdpKchyVXKJ=cG-xsLazY6fCzgpjNdQsS6NRCbUJ-Z4w@mail.gmail.com>
References: <hjrcfbtrn1pog5dl1707jc5o.1550438115800@comcast.net>
	<259F2AB6-3478-4CDF-91E3-8A1D40634924@aol.com>
	<CAGzJkdxhhWF0kyeHXiCKBZvLrke8qo6qM4oXFp4m_zurPwBXnw@mail.gmail.com>
	<CAGzJkdwdpKchyVXKJ=cG-xsLazY6fCzgpjNdQsS6NRCbUJ-Z4w@mail.gmail.com>
Message-ID: <4837390134154942942f933d8c50adac@EXCHMBX01.salisbury.edu>

Sao what?s it going to take to get the cable from you???

Ray F/KA3EKH

From: MilComm Guy [mailto:m38inmaine at gmail.com]
Sent: Monday, February 18, 2019 1:27 PM
To: Mkdorney <mkdorney at aol.com>
Cc: Walt Skavinsky <walter.skavinsky at comcast.net>; Ray Fantini <RAFANTINI at salisbury.edu>; Mrca Mailing List <MRCA at mailman.qth.net>; Military Surplus Mail List <milsurplus at mailman.qth.net>; MMRCG_groups.io <MMRCG at groups.io>
Subject: Re: [MRCA] AN/VSC-2 teletype

I also have the cables, I ran my set stand alone before I purchased a shelter, then sadly sold it.  I was hoping to find the telelype and modem again.  It worked quite well, I still have the printout from my first contact, it was with another GRC-142 shelter in FL.
[DSCN5024.JPG]

On Mon, Feb 18, 2019 at 1:16 PM MilComm Guy <m38inmaine at gmail.com<mailto:m38inmaine at gmail.com>> wrote:
I have a NOS ribbon, I listed it previously for trade, I am looking for a nice H-140 headset.

On Sun, Feb 17, 2019 at 4:57 PM Mkdorney via MRCA <mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>> wrote:
Better solution that a 1/4 trailer. Also costs a lot more, however. Don?t know if the costs outweigh the benefits.

Mark D.

Sent from my iPhone

On Feb 17, 2019, at 4:15 PM, Walt Skavinsky <walter.skavinsky at comcast.net<mailto:walter.skavinsky at comcast.net>> wrote:
You need a Dodge m37 and an S318 shelter make up your own grc122

Walt


here are only 1 0 types of people in this world... those who understand binary, and those who don't.
From: RAFANTINI at salisbury.edu<mailto:RAFANTINI at salisbury.edu>
Sent: February 17, 2019 13:35
To: MRCA at mailman.qth.net<mailto:MRCA at mailman.qth.net>; MMRCG at groups.io<mailto:MMRCG at groups.io>
Cc: milsurplus at mailman.qth.net<mailto:milsurplus at mailman.qth.net>
Subject: [MRCA] AN/VSC-2 teletype


In yet a new effort to move forward into the past I am attempting to get all of the teletype equipment functional with my GRC-106, yes as crazy as it sounds there was something called the AN/VSC-2 that was a GRC-106, MD-522 and a teletype machine all installed in a M151, and thru a series of unusual circumstances I happen to have all the bits for putting one together but don?t think I will be going quite that far being it involves giving up almost all the back set and the passengers seat so I will stick with the stock GRC-106 installation on the mutt and maybe set the MD-522 and the UGC-74 up just outside.
So I pulled the UGC-74B out last night and cleaned it up and did all the regular checks and the like and that?s working. Will be pulling the MD-522A today and cleaning that up and looking for all the cables and the one cable I appear to need now is the data cable for the back of the UGC-74 that?s a type MS3112E 16-23 P connector. I can build the rest. I am also somewhat befuddled by what to do about the printer ribbon.  Anyone have any experience with dumping ink on these things?
A while back I tried to join the ?Greenkeys? list but for some reason they did not accept me? Perhaps there requirements for association is beyond what the list are here. May have to try applying to that again but figure it won?t hurt to ask around these reflectors first.

Ray F/KA3EKH


______________________________________________________________
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<mailto:MRCA at mailman.qth.net>

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From RAFANTINI at salisbury.edu  Mon Feb 18 13:48:25 2019
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Mon, 18 Feb 2019 18:48:25 +0000
Subject: [Milsurplus] [MRCA] AN/VSC-2 teletype
In-Reply-To: <F6F39BFA-ECB1-4EDF-BE7A-0F6A0EE1356F@gmail.com>
References: <hjrcfbtrn1pog5dl1707jc5o.1550438115800@comcast.net>
	<259F2AB6-3478-4CDF-91E3-8A1D40634924@aol.com>
	<CAGzJkdxhhWF0kyeHXiCKBZvLrke8qo6qM4oXFp4m_zurPwBXnw@mail.gmail.com>
	<CAGzJkdwdpKchyVXKJ=cG-xsLazY6fCzgpjNdQsS6NRCbUJ-Z4w@mail.gmail.com>
	<858529682.1119277.1550515054841@mail.yahoo.com>
	<F6F39BFA-ECB1-4EDF-BE7A-0F6A0EE1356F@gmail.com>
Message-ID: <5bab491ec69f419ab3d202e08caa71e0@EXCHMBX01.salisbury.edu>

Very close to running on air test. Been talking with Nick about putting some of his TTY stuff to work. Right now thinking 60 WPM 850 shift, just need to select frequency and time and get this cable between the UGC-74B and the MD-522A fabricated. Have the schematic and already built up cable between radio and MD-522A
Going to start with using Harris 350K before dragging everything into the field and using GRC-106
Have a copy of MTTY on a laptop but looks like I will have all the issues worked out using vintage military equipment before I play around with using the software.

Ray F/KA3EKH

From: Peter Gottlieb [mailto:kb2vtl at gmail.com]
Sent: Monday, February 18, 2019 1:40 PM
To: Kris Dawkins <wolfkin73 at yahoo.com>
Cc: Mkdorney <mkdorney at aol.com>; MilComm Guy <m38inmaine at gmail.com>; Ray Fantini <RAFANTINI at salisbury.edu>; Mrca Mailing List <MRCA at mailman.qth.net>; Military Surplus Mail List <milsurplus at mailman.qth.net>; MMRCG_groups.io <MMRCG at groups.io>
Subject: Re: [MRCA] AN/VSC-2 teletype

Maybe some day we can have a QSO between ours!

Peter

On Feb 18, 2019, at 1:37 PM, Kris Dawkins via MRCA <mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>> wrote:
 I have your An/GRC-142, still collecting bits and pieces for it.
Chris Dawkins
KM4BJG

On Monday, February 18, 2019, 1:28:23 PM EST, MilComm Guy <m38inmaine at gmail.com<mailto:m38inmaine at gmail.com>> wrote:


I also have the cables, I ran my set stand alone before I purchased a shelter, then sadly sold it.  I was hoping to find the telelype and modem again.  It worked quite well, I still have the printout from my first contact, it was with another GRC-142 shelter in FL.
<DSCN5024.JPG>

On Mon, Feb 18, 2019 at 1:16 PM MilComm Guy <m38inmaine at gmail.com<mailto:m38inmaine at gmail.com>> wrote:
I have a NOS ribbon, I listed it previously for trade, I am looking for a nice H-140 headset.

On Sun, Feb 17, 2019 at 4:57 PM Mkdorney via MRCA <mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>> wrote:
Better solution that a 1/4 trailer. Also costs a lot more, however. Don?t know if the costs outweigh the benefits.

Mark D.

Sent from my iPhone

On Feb 17, 2019, at 4:15 PM, Walt Skavinsky <walter.skavinsky at comcast.net<mailto:walter.skavinsky at comcast.net>> wrote:
You need a Dodge m37 and an S318 shelter make up your own grc122

Walt


here are only 1 0 types of people in this world... those who understand binary, and those who don't.
From: RAFANTINI at salisbury.edu<mailto:RAFANTINI at salisbury.edu>
Sent: February 17, 2019 13:35
To: MRCA at mailman.qth.net<mailto:MRCA at mailman.qth.net>; MMRCG at groups.io<mailto:MMRCG at groups.io>
Cc: milsurplus at mailman.qth.net<mailto:milsurplus at mailman.qth.net>
Subject: [MRCA] AN/VSC-2 teletype



In yet a new effort to move forward into the past I am attempting to get all of the teletype equipment functional with my GRC-106, yes as crazy as it sounds there was something called the AN/VSC-2 that was a GRC-106, MD-522 and a teletype machine all installed in a M151, and thru a series of unusual circumstances I happen to have all the bits for putting one together but don?t think I will be going quite that far being it involves giving up almost all the back set and the passengers seat so I will stick with the stock GRC-106 installation on the mutt and maybe set the MD-522 and the UGC-74 up just outside.

So I pulled the UGC-74B out last night and cleaned it up and did all the regular checks and the like and that?s working. Will be pulling the MD-522A today and cleaning that up and looking for all the cables and the one cable I appear to need now is the data cable for the back of the UGC-74 that?s a type MS3112E 16-23 P connector. I can build the rest. I am also somewhat befuddled by what to do about the printer ribbon.  Anyone have any experience with dumping ink on these things?

A while back I tried to join the ?Greenkeys? list but for some reason they did not accept me? Perhaps there requirements for association is beyond what the list are here. May have to try applying to that again but figure it won?t hurt to ask around these reflectors first.



Ray F/KA3EKH


______________________________________________________________
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<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<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
<DSCN5024.JPG>
______________________________________________________________
MRCA mailing list
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:MRCA at mailman.qth.net

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From holden7471 at msn.com  Mon Feb 18 22:39:15 2019
From: holden7471 at msn.com (howard holden)
Date: Tue, 19 Feb 2019 03:39:15 +0000
Subject: [Milsurplus] Winter 2019 Classic Exchange Phone
Message-ID: <BYAPR06MB4213E40BB62318BE45C38A47C47C0@BYAPR06MB4213.namprd06.prod.outlook.com>

The Phone Classic Exchange will take place Sunday Feb 24 1300Z to Feb 25 0700Z and Tuesday Feb 26 1300Z to Feb 27 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

Suggested CX Frequencies  (+/- QRM)
               160M     80M      40M      20M       15M       10M        6M          2M
AM         1.890     3.860     7.270     14.280  21.400   29.000  50.400   144.300
SSB         1.920     3.840     7.250     14.260   21.380   28.600   50.125   144.200

Bonus Points for the Winter 2019 CX:
Bonus #1: 500 Points for each dynamotor powered TX and RX that is qualified.
Bonus #2: 500 Points for each Johnson transmitter, amplifier, SSB adapter, and VFO that is qualified.
Bonus #3: 500 Points for each Knight transmitter, receiver, and VFO that is qualified.
2000 points max for each bonus per mode.

For full details, rules, and logging submissions, visit the CX website:
http://classicexchange.org/jan19/Winter_2019_CX_Rules.pdf

Questions? Contact:
Mark   k3msb at arrl.net<mailto:k3msb at arrl.net>
Ron     k2rp at arrl.net<mailto:k2rp at arrl.net>
(or you can contact me WB2AWQ at arrl.net<mailto:WB2AWQ at arrl.net>)

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From arc5 at ix.netcom.com  Tue Feb 19 12:57:18 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Tue, 19 Feb 2019 11:57:18 -0600
Subject: [Milsurplus] Canadian Marconi CH25 Info Needed
Message-ID: <000001d4c87c$8ea70f40$abf52dc0$@netcom.com>

Is anyone familiar with the Canadian Marconi CH25
HF SSB/AM transceiver?  Any documentation or
especially,
schematics?  Any parts sets?
It has two "12 Volt 6146"  8552 tubes in
the PA.  They have little 1/8th Watt resistors,
bypassed by caps, in the
cathode connection to ground, very likely to act 
as "fuses" to protect the finals against untuned 
condition- common in this type of service.
The color code on these little resistors is
 "yellow-ash-soot."  Anyone have a clue?

TNX OM ES 73 DE Dave AB5S



From tubetester at gmail.com  Tue Feb 19 13:15:28 2019
From: tubetester at gmail.com (Moe Fretz)
Date: Tue, 19 Feb 2019 13:15:28 -0500
Subject: [Milsurplus] [MMRCG] Canadian Marconi CH25 Info Needed
In-Reply-To: <000001d4c87c$8ea70f40$abf52dc0$@netcom.com>
References: <000001d4c87c$8ea70f40$abf52dc0$@netcom.com>
Message-ID: <CAFhA9cx+1=Jk9UA79KZ2BKOS5Z=HLq9d-xwVJ=8+P8dJnNgtEA@mail.gmail.com>

Here ya go David

http://www.jproc.ca/marconi/ch25.html

Jerry has a great site here.

$-------&
Moe Fretz

L'Orignal
Ontario, Canada


On Tue, Feb 19, 2019 at 12:57 PM David Stinson <arc5 at ix.netcom.com> wrote:

> Is anyone familiar with the Canadian Marconi CH25
> HF SSB/AM transceiver?  Any documentation or
> especially,
> schematics?  Any parts sets?
> It has two "12 Volt 6146"  8552 tubes in
> the PA.  They have little 1/8th Watt resistors,
> bypassed by caps, in the
> cathode connection to ground, very likely to act
> as "fuses" to protect the finals against untuned
> condition- common in this type of service.
> The color code on these little resistors is
>  "yellow-ash-soot."  Anyone have a clue?
>
> TNX OM ES 73 DE Dave AB5S
>
>
>
> -=-=-=-=-=-=-=-=-=-=-=-
> Groups.io Links: You receive all messages sent to this group.
>
> View/Reply Online (#595): https://groups.io/g/MMRCG/message/595
> Mute This Topic: https://groups.io/mt/29919870/850106
> Group Owner: MMRCG+owner at groups.io
> Unsubscribe: https://groups.io/g/MMRCG/leave/2227732/2139961994/xyzzy  [
> tubetester at gmail.com]
> -=-=-=-=-=-=-=-=-=-=-=-
>
>
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From arc5 at ix.netcom.com  Tue Feb 19 13:36:39 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Tue, 19 Feb 2019 12:36:39 -0600
Subject: [Milsurplus] [MMRCG] Canadian Marconi CH25 Info Needed
In-Reply-To: <CAFhA9cx+1=Jk9UA79KZ2BKOS5Z=HLq9d-xwVJ=8+P8dJnNgtEA@mail.gmail.com>
References: <000001d4c87c$8ea70f40$abf52dc0$@netcom.com>
	<CAFhA9cx+1=Jk9UA79KZ2BKOS5Z=HLq9d-xwVJ=8+P8dJnNgtEA@mail.gmail.com>
Message-ID: <000e01d4c882$0d98d310$28ca7930$@netcom.com>

Thank you kindly, Moe.
Jerry does indeed have  a great site.  While he has some 

useful information, does not have any schematics or manuals.

TNX OM DE Dave AB5S

 

From: Moe
Subject: Re: [MMRCG] Canadian Marconi CH25 Info Needed

 

Here ya go David

 

http://www.jproc.ca/marconi/ch25.html

 

Jerry has a great site here.

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From arc5 at ix.netcom.com  Tue Feb 19 14:19:58 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Tue, 19 Feb 2019 13:19:58 -0600
Subject: [Milsurplus] TCS Unobtainium, Obtained!
Message-ID: <002b01d4c888$1a9f1e10$4fdd5a30$@netcom.com>

This lovely TCS-6 had just one part remaining to
get
it back in good operating condition, but it was a
"ringer."
The RF Gain control is a 10K pot "with a
difference."
Like many pots it has a switch, but this one
activates 
at the full clockwise position, where it activates
the AVC
for AM operation, rather than the common
ones which operate at full counter-clockwise.
This thing
must be unique to TCS receivers and I had little
hope 
of finding one, but had to ask.

Well, Jacques Fortin, VE2JFE, is my hero!  He
found 
the parts and assembled a replacement pot, which
is now happily living in the TCS-6 receiver.

Thank you so much, Jacques!
Our people are the best.
TNX ES 73 OM DE Dave AB5S


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From kb8tq at n1k.org  Tue Feb 19 16:49:58 2019
From: kb8tq at n1k.org (Bob kb8tq)
Date: Tue, 19 Feb 2019 16:49:58 -0500
Subject: [Milsurplus] [MMRCG] Canadian Marconi CH25 Info Needed
In-Reply-To: <000e01d4c882$0d98d310$28ca7930$@netcom.com>
References: <000001d4c87c$8ea70f40$abf52dc0$@netcom.com>
	<CAFhA9cx+1=Jk9UA79KZ2BKOS5Z=HLq9d-xwVJ=8+P8dJnNgtEA@mail.gmail.com>
	<000e01d4c882$0d98d310$28ca7930$@netcom.com>
Message-ID: <C6326C75-CA9C-4EC8-82C1-416756738894@n1k.org>

Hi

A Heath SB-401 used three 10 ohm resistors on the cathode of each of the output tubes.  I built 
mine ?. errrr ?. a long time ago ?. and don?t recall if they
just how big they were (1/2 W maybe). 

Bob

> On Feb 19, 2019, at 1:36 PM, David Stinson <arc5 at ix.netcom.com> wrote:
> 
> Thank you kindly, Moe.
> Jerry does indeed have  a great site.  While he has some
> useful information, does not have any schematics or manuals.
> TNX OM DE Dave AB5S
>  
> From: Moe
> Subject: Re: [MMRCG] Canadian Marconi CH25 Info Needed
>  
> Here ya go David
>  
> http://www.jproc.ca/marconi/ch25.html <http://www.jproc.ca/marconi/ch25.html>
>  
> Jerry has a great site here.
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

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From arc5 at ix.netcom.com  Tue Feb 19 17:06:50 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Tue, 19 Feb 2019 16:06:50 -0600
Subject: [Milsurplus] TCS Unobtainium, Obtained!
Message-ID: <005801d4c89f$6af4f260$40ded720$@netcom.com>

This lovely TCS-6 had just one part remaining to
get it back in good operating condition, but it
was a "ringer."
The RF Gain control is a 10K pot "with a
difference."
Like many pots it has a switch, but this one
activates at the full clockwise position, where it
activates the AVC for AM operation, rather than
the common ones which operate at full
counter-clockwise.  This thing must be unique to
TCS receivers and I had little hope of finding
one, but had to ask.

Well, Jacques Fortin, VE2JFE, is my hero!  He
found the parts and assembled a replacement pot,
which is now happily living in the TCS-6 receiver.

Thank you so much, Jacques!
Our people are the best.
TNX ES 73 OM DE Dave AB5S


From arc5 at ix.netcom.com  Tue Feb 19 17:10:55 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Tue, 19 Feb 2019 16:10:55 -0600
Subject: [Milsurplus] Canadian Marconi CH25 Manual Found.
Message-ID: <005e01d4c89f$fcf5f600$f6e1e200$@netcom.com>


Bob, W9RAN, came through with a .pdf of the manual
for the CH25.  Awesome bunch of folks we have!
For anyone else interested:
********************

Dave, you're in luck.   Some time ago I rented the
use of a few hard-to-find Canadian Marconi manuals
from Conception RB who was a dealer for them for
some years in Quebec.    WD8INC provided scanning
services, and so now we have that manual in pdf
form for anyone who needs it:

https://www.dropbox.com/s/zwd9swwugqzgs01/Canadian
%20Marconi%20CH25%20HF%20SSB%20Radiotelephone%20Se
rvice%20Manual.pdf?dl=0

I have one but it had some issue and I'd put it on
the "To Be Fixed" 
shelf (a greatly overloaded shelf!) and haven't
gotten back to it after I obtained the manual.
So I'd be interested in whatever you learn about
the set, which was pretty widely used for HF comms
up in the great white nort' eh?

73, Bob W9RAN




From kargo_cult at msn.com  Tue Feb 19 17:48:04 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Tue, 19 Feb 2019 22:48:04 +0000
Subject: [Milsurplus] AVT-112 Ant. Load Coil Box ?
Message-ID: <MWHPR14MB1485D3F071FF7C667F4F541BE47C0@MWHPR14MB1485.namprd14.prod.outlook.com>

I acquired a small box 5 x 3.5 x 3 which is suggested was an antenna load coil for the AVT-112 type transmitter. My manuals are not handy,
so I cannot verify this. Occurs to me it might be for the Motorola Airboy instead. If this is indeed for the RCA radio, I will pass this on for a
very modest cost. It was my intention getting this thing to pass it along.
Photo later, if anyone interested.
-Hue Miller


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From arc5 at ix.netcom.com  Tue Feb 19 20:11:55 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Tue, 19 Feb 2019 19:11:55 -0600
Subject: [Milsurplus] AVT-112 Ant. Load Coil Box ?
In-Reply-To: <MWHPR14MB1485D3F071FF7C667F4F541BE47C0@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB1485D3F071FF7C667F4F541BE47C0@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <001601d4c8b9$45ecaa70$d1c5ff50$@netcom.com>

No Antenna Loading accessory for the AVT-112, at
least not by RCA.

The AVR-15 receiver has an external loading coil
to help the small 

antenna work on the beacon band.  

Is this box grey with holes for tuning coil slugs?

 

From:  Hubert Miller
Subject: [Milsurplus] AVT-112 Ant. Load Coil Box ?

 

I acquired a small box 5 x 3.5 x 3 which is
suggested was an antenna load coil for the AVT-112
type transmitter. My manuals are not handy,

so I cannot verify this. Occurs to me it might be
for the Motorola Airboy instead. If this is indeed
for the RCA radio, I will pass this on for a

very modest cost. It was my intention getting this
thing to pass it along.

Photo later, if anyone interested.

-Hue Miller 

 

 

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From kargo_cult at msn.com  Tue Feb 19 22:35:16 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 20 Feb 2019 03:35:16 +0000
Subject: [Milsurplus] [Glowbugs] German CQ magazine 1949
In-Reply-To: <709678094.2029915.1550626653728@mail.yahoo.com>
References: <709678094.2029915.1550626653728.ref@mail.yahoo.com>
	<709678094.2029915.1550626653728@mail.yahoo.com>
Message-ID: <MWHPR14MB14854410EF425D81F50B3A19E47D0@MWHPR14MB1485.namprd14.prod.outlook.com>

Thanks for your input, which did spur me to have a look at this excellent website article and to peer at the magazine cover photo with my glasses off.
The German "HRO", model KST, was not black.
Also, I mention the website has this error: what they call the Japanese "HRO" is not. The Japanese HRO, "Chi-Ichi" ( I think ), has plug-in coils the same as the HRO,
has a crystal filter, but no meter. How do I know this? I have 2 of them. There was also a "3/4 size" Japanese HRO for mobile troops use. ( Some sources say airborne
troops, but that seems unlikely as hell. )
After squinting at the photograph and looking at the article, and I think the scan of such low res photos always loses something, I came up with this:
It IS a HRO-W, the WW2 Signal Corps receiver.
It has the round meter with bottom plastic area that covers part of the meter glass; has no noise limiter control; all other controls match the HRO-W. So this ham
got it surplus from U.S. military "somehow". He must have had a pretty good job to be able to afford this in the still-ruined German economy, I think.
-Hue

From: n2ey
Sent: Tuesday, February 19, 2019 5:38 PM
Subject: Re: [Glowbugs] German CQ magazine 1949

It should be remembered that the Germans built copies of the HRO during the war, and what appears to be an HRO may actually be a copy.
In addition, the HRO first appeared in 1935, and if the receiver is a pre-war model, was probably acquired before 1939.

http://www.radioblvd.com/National%20HRO.htm

yielded a picture of a German copy being tested alongside a genuine HRO (see attached).

73 de Jim, N2EY


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From kargo_cult at msn.com  Tue Feb 19 22:46:51 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 20 Feb 2019 03:46:51 +0000
Subject: [Milsurplus] [Glowbugs] German CQ magazine 1949
In-Reply-To: <MWHPR14MB14854410EF425D81F50B3A19E47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <709678094.2029915.1550626653728.ref@mail.yahoo.com>
	<709678094.2029915.1550626653728@mail.yahoo.com>
	<MWHPR14MB14854410EF425D81F50B3A19E47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <MWHPR14MB14853D7554D4301FD16E57CBE47D0@MWHPR14MB1485.namprd14.prod.outlook.com>

Oops?slightly more complicated?.
squinting again at the magazine photo, I note:
nameplate is more square and less elongated than the military HRO-W
STANDBY and PHASING controls do not have chrome ring,
so, not WW2 U.S.
But?.the meter style, with the plastic frame cutting straight across the bottom fraction of the meter face?.is WW2  HRO-W.
I would have to guess?.late pre-war production ?
-Hue
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From kargo_cult at msn.com  Tue Feb 19 23:38:18 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 20 Feb 2019 04:38:18 +0000
Subject: [Milsurplus] BC-326A switchbox
Message-ID: <MWHPR14MB14858518FE923665168A0D5CE47D0@MWHPR14MB1485.namprd14.prod.outlook.com>

I have a BC-326A  ( yes, stamped exactly so, not BC-326-A available for mailing cost.
However, I expect there are VERY few readers with the exact receiver tuning head to use this.
-Hue
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From brunneraa1p at comcast.net  Wed Feb 20 02:46:17 2019
From: brunneraa1p at comcast.net (RICHARD BRUNNER)
Date: Wed, 20 Feb 2019 02:46:17 -0500 (EST)
Subject: [Milsurplus] [Glowbugs] German CQ magazine 1949
In-Reply-To: <MWHPR14MB14854410EF425D81F50B3A19E47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <709678094.2029915.1550626653728.ref@mail.yahoo.com>
	<709678094.2029915.1550626653728@mail.yahoo.com>
	<MWHPR14MB14854410EF425D81F50B3A19E47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <261077999.72408.1550648777998@connect.xfinity.com>

Yes, the Germans copied the HRO, and, I read, sourced the tuning capacitor and dial through Spain.  Any confirmation out there?

Richard, AA1P

> On February 19, 2019 at 10:35 PM Hubert Miller <kargo_cult at msn.com> wrote:
> 
> 
>     Thanks for your input, which did spur me to have a look at this excellent website article and to peer at the magazine cover photo with my glasses off.
>     The German "HRO", model KST, was not black.
> 
>     Also, I mention the website has this error: what they call the Japanese "HRO" is not. The Japanese HRO, "Chi-Ichi" ( I think ), has plug-in coils the same as the HRO,
> 
>     has a crystal filter, but no meter. How do I know this? I have 2 of them. There was also a "3/4 size" Japanese HRO for mobile troops use. ( Some sources say airborne
> 
>     troops, but that seems unlikely as hell. )
> 
>     After squinting at the photograph and looking at the article, and I think the scan of such low res photos always loses something, I came up with this:
> 
>     It IS a HRO-W, the WW2 Signal Corps receiver.
> 
>     It has the round meter with bottom plastic area that covers part of the meter glass; has no noise limiter control; all other controls match the HRO-W. So this ham
> 
>     got it surplus from U.S. military "somehow". He must have had a pretty good job to be able to afford this in the still-ruined German economy, I think.
> 
>     -Hue
> 
>      
> 
>         From: n2ey
> 
>         Sent: Tuesday, February 19, 2019 5:38 PM
>         Subject: Re: [Glowbugs] German CQ magazine 1949
> 
>          
> 
>         It should be remembered that the Germans built copies of the HRO during the war, and what appears to be an HRO may actually be a copy.
> 
>         In addition, the HRO first appeared in 1935, and if the receiver is a pre-war model, was probably acquired before 1939.
> 
>          
> 
>         http://www.radioblvd.com/National%20HRO.htm
> 
>          
> 
>         yielded a picture of a German copy being tested alongside a genuine HRO (see attached).
> 
>          
> 
>         73 de Jim, N2EY
> 
>          
> 
>          
> 


 

> 
>      
> 
>     --
>     --
>      
> 
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From kargo_cult at msn.com  Wed Feb 20 03:05:52 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 20 Feb 2019 08:05:52 +0000
Subject: [Milsurplus] [Glowbugs] German CQ magazine 1949
In-Reply-To: <261077999.72408.1550648777998@connect.xfinity.com>
References: <709678094.2029915.1550626653728.ref@mail.yahoo.com>
	<709678094.2029915.1550626653728@mail.yahoo.com>
	<MWHPR14MB14854410EF425D81F50B3A19E47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
	<261077999.72408.1550648777998@connect.xfinity.com>
Message-ID: <MWHPR14MB148500231E99CFA8AB247A9EE47D0@MWHPR14MB1485.namprd14.prod.outlook.com>

>Yes, the Germans copied the HRO, and, I read, sourced the tuning capacitor and dial through Spain.  Any confirmation out there?

Richard, AA1P
This is stated in Fritz Trenkle's book in the discussion on communications receivers.
These books were I believe, published around 1970 something and by Telefunken, if I recall.
The importation of the parts thru neutral Portugal ended of course, when U.S. entered WW2 and no more National Radio exports.
-Hue
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From aaf-radio-1 at aafradio.org  Wed Feb 20 07:43:42 2019
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Wed, 20 Feb 2019 07:43:42 -0500
Subject: [Milsurplus] BC-326A switchbox
In-Reply-To: <MWHPR14MB14858518FE923665168A0D5CE47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB14858518FE923665168A0D5CE47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <912de0a0-bc0c-e056-e5a8-e3289d26e09c@aafradio.org>

Just so's others know what you are talking about, Hue.? The BC-326 
lowers aircraft voltage for the 3 volt M-185 tuning dial light that 
mounts on a standard MC-125-A tuning head for the SCR-183/283 radio sets:


On 2/19/2019 11:38 PM, Hubert Miller wrote:
>
> I have a BC-326A ?( yes, stamped exactly so, not BC-326-A available 
> for mailing cost.
>
> However, I expect there are VERY few readers with the exact receiver 
> tuning head to use this.
>
> -Hue
>

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From arc5 at ix.netcom.com  Wed Feb 20 12:18:10 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Wed, 20 Feb 2019 11:18:10 -0600
Subject: [Milsurplus] BC-326A switchbox
In-Reply-To: <912de0a0-bc0c-e056-e5a8-e3289d26e09c@aafradio.org>
References: <MWHPR14MB14858518FE923665168A0D5CE47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
	<912de0a0-bc0c-e056-e5a8-e3289d26e09c@aafradio.org>
Message-ID: <001f01d4c940$41318000$c3948000$@netcom.com>

Thanks to the generous help of Mr. Mike Hanz, 

here is the BC-326 with its companions:

 

 

 

From: Michael Hanz
Subject: Re: [Milsurplus] BC-326A switchbox

 

Just so's others know what you are talking about,
Hue.  The BC-326 lowers aircraft voltage for the 3
volt M-185 tuning dial light that mounts on a
standard MC-125-A tuning head for the SCR-183/283
radio sets:



 

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From kb1fqg at yahoo.com  Wed Feb 20 13:24:28 2019
From: kb1fqg at yahoo.com (John Flood)
Date: Wed, 20 Feb 2019 18:24:28 +0000 (UTC)
Subject: [Milsurplus] CU-872A/U antenna coupler FS near Boston
References: <943106671.2431940.1550687068980.ref@mail.yahoo.com>
Message-ID: <943106671.2431940.1550687068980@mail.yahoo.com>

Greetings,
This is working, some "test" readings are a bit on the low side so perhaps some of the 6922 tubes are getting tired.? There is some glue residue below the normal data tag most likely from some other data tag that was mounted there.? Looking for a local sale in the Metrowest or North Shore Boston (This of course means that the first reply will come from Alaska!).? I'm not really interested in shipping this or dealing with Paypal any more in MA.? Any interest?? I could bring it to the Lewiston ME, Nashua, NH, or Framingham, MA fleas.? Nearfest as well but I hope it finds a home sooner than May!
John Flood N1JAF978-979-2807
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From scr287 at att.net  Wed Feb 20 14:11:05 2019
From: scr287 at att.net (Jack Antonio)
Date: Wed, 20 Feb 2019 14:11:05 -0500
Subject: [Milsurplus] BC-326A switchbox
In-Reply-To: <912de0a0-bc0c-e056-e5a8-e3289d26e09c@aafradio.org>
References: <MWHPR14MB14858518FE923665168A0D5CE47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
	<912de0a0-bc0c-e056-e5a8-e3289d26e09c@aafradio.org>
Message-ID: <df0845e8-f697-00dc-e5dc-a77ae238453f@att.net>



On 2/20/2019 7:43 AM, Michael Hanz wrote:
> Just so's others know what you are talking about, Hue.??? The BC-326 
> lowers aircraft voltage for the 3 volt M-185 tuning dial light that 
> mounts on a standard MC-125-A tuning head for the SCR-183/283 radio sets:


Just curious,

but based on the wording of Hue's original post, is there some
difference between the Mike's BC-326 and Hue's BC-326A?

Jack Antonio
WA7DIA

From aaf-radio-1 at aafradio.org  Wed Feb 20 14:16:40 2019
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Wed, 20 Feb 2019 14:16:40 -0500
Subject: [Milsurplus] BC-326A switchbox
In-Reply-To: <df0845e8-f697-00dc-e5dc-a77ae238453f@att.net>
References: <MWHPR14MB14858518FE923665168A0D5CE47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
	<912de0a0-bc0c-e056-e5a8-e3289d26e09c@aafradio.org>
	<df0845e8-f697-00dc-e5dc-a77ae238453f@att.net>
Message-ID: <74fabed4-2ff7-421e-fc3a-9edb58a50320@aafradio.org>

Only the series resistor inside.? The BC-326A model is for 28vdc, the 
BC-326 is for 14vdc.

 ?- Mike? KC4TOS

On 2/20/2019 2:11 PM, Jack Antonio wrote:

> On 2/20/2019 7:43 AM, Michael Hanz wrote:
>> Just so's others know what you are talking about, Hue.??? The BC-326 
>> lowers aircraft voltage for the 3 volt M-185 tuning dial light that 
>> mounts on a standard MC-125-A tuning head for the SCR-183/283 radio 
>> sets:
>
> Just curious,
>
> but based on the wording of Hue's original post, is there some
> difference between the Mike's BC-326 and Hue's BC-326A?
>
> Jack Antonio WA7DIA


From arc5 at ix.netcom.com  Wed Feb 20 14:34:06 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Wed, 20 Feb 2019 13:34:06 -0600
Subject: [Milsurplus] HC6/U Crystals Needed
Message-ID: <001001d4c953$3ec6c6f0$bc5454d0$@netcom.com>

Seeking these HC6U crystals.  Smaller wire leads
OK.
Can't use FT-243 or larger for this app:

3435  3541  4345  4451  6705  6835  7615  7745

TNX OM ES 73 DE Dave AB5S



From w2hx at w2hx.com  Wed Feb 20 14:53:07 2019
From: w2hx at w2hx.com (W2HX)
Date: Wed, 20 Feb 2019 19:53:07 +0000
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near
	Boston
In-Reply-To: <943106671.2431940.1550687068980@mail.yahoo.com>
References: <943106671.2431940.1550687068980.ref@mail.yahoo.com>,
	<943106671.2431940.1550687068980@mail.yahoo.com>
Message-ID: <1550692386950.11606@w2hx.com>

John et al., 

This is an interesting multicoupler. One interesting thing I've wondered about...It has a 70 ohm antenna matching input impedance. And i always wondered if the antenna connector was a 75 ohm N connector or the standard 50 ohm. (The difference is that the male center pin is thicker on the 50 ohm version, and will damage a 75 ohm female part)
Just something to look out for.

Wikipedia has a nice photo of both impedances and genders.

73 Eugene W2HX

________________________________________
From: boatanchors-bounces at mailman.qth.net <boatanchors-bounces at mailman.qth.net> on behalf of John Flood via Boatanchors <boatanchors at mailman.qth.net>
Sent: Wednesday, February 20, 2019 1:24 PM
To: MilSurplus QSLNet; r-390 at mailman.qth.net; BOATANCHORS2 LIST
Subject: [Boatanchors] CU-872A/U antenna coupler FS near Boston

Greetings,
This is working, some "test" readings are a bit on the low side so perhaps some of the 6922 tubes are getting tired.  There is some glue residue below the normal data tag most likely from some other data tag that was mounted there.  Looking for a local sale in the Metrowest or North Shore Boston (This of course means that the first reply will come from Alaska!).  I'm not really interested in shipping this or dealing with Paypal any more in MA.  Any interest?  I could bring it to the Lewiston ME, Nashua, NH, or Framingham, MA fleas.  Nearfest as well but I hope it finds a home sooner than May!
John Flood N1JAF978-979-2807
______________________________________________________________
Boatanchors mailing list
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Help: http://mailman.qth.net/mmfaq.htm
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Please help support this email list: http://www.qsl.net/donate.html
Message delivered to w2hx at w2hx.com

From wa5cab at cs.com  Wed Feb 20 15:37:02 2019
From: wa5cab at cs.com (Robert Downs)
Date: Wed, 20 Feb 2019 14:37:02 -0600
Subject: [Milsurplus] BC-326A switchbox
In-Reply-To: <74fabed4-2ff7-421e-fc3a-9edb58a50320@aafradio.org>
References: <MWHPR14MB14858518FE923665168A0D5CE47D0@MWHPR14MB1485.namprd14.prod.outlook.com>	<912de0a0-bc0c-e056-e5a8-e3289d26e09c@aafradio.org>	<df0845e8-f697-00dc-e5dc-a77ae238453f@att.net>
	<74fabed4-2ff7-421e-fc3a-9edb58a50320@aafradio.org>
Message-ID: <009401d4c95c$09939c70$1cbad550$@com>

I assumed that the reason Hue wrote his post as he did (repeating BC-326A
without the second hyphen) is that the vendor made an error in the
nomenclature.  According to the Signal Corps's nomenclature standards, it
should have been BC-326-A.  The AN system, on the other hand, calls for no
character between the last digit of the nomenclature and any suffix letter.
So R-23A/ARC-5 is correct.

I have a batch of NOS generator legs that are all stamped LG-2A instead of
LG-2-A.  Plus to compound the error, although the LG-2-A were supposed to be
made of aluminum, these got made out of steel just like the original LG-2's.
So if you were someone sending a shipment of legs somewhere, you wouldn't
know which weight to use.  I always thought this was the reason that most
aluminum ones are marked LG-2-B, to correct the error.  Later. All of the
steel LG-2A's got marked for MAAP (giveaway).

Robert Downs


-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Michael Hanz
Sent: Wednesday, February 20, 2019 13:17
To: Jack Antonio; milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] BC-326A switchbox

Only the series resistor inside.? The BC-326A model is for 28vdc, the 
BC-326 is for 14vdc.

 ?- Mike? KC4TOS

On 2/20/2019 2:11 PM, Jack Antonio wrote:

> On 2/20/2019 7:43 AM, Michael Hanz wrote:
>> Just so's others know what you are talking about, Hue.??? The BC-326 
>> lowers aircraft voltage for the 3 volt M-185 tuning dial light that 
>> mounts on a standard MC-125-A tuning head for the SCR-183/283 radio 
>> sets:
>
> Just curious,
>
> but based on the wording of Hue's original post, is there some
> difference between the Mike's BC-326 and Hue's BC-326A?
>
> Jack Antonio WA7DIA

______________________________________________________________
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From kargo_cult at msn.com  Wed Feb 20 16:09:04 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 20 Feb 2019 21:09:04 +0000
Subject: [Milsurplus] Some more of the surplus story
Message-ID: <MWHPR14MB14854CD1276601DE4BEA7CB7E47D0@MWHPR14MB1485.namprd14.prod.outlook.com>

>From 'Air Classics' magazine, U.S.A., March 1992, some more of "the surplus story" :

"After VE Day...5000 planes were sent back to the U.S. to be redeployed to the Pacific....The plan was to recondition each plane....but the war ended on VJ Day and they were diverted
to storage depots. 
"In March 1946 there were still some 16,000 aircraft overseas. More than 9000 were flown back to the United States....much of the remainder was either salvaged or scrapped. Scrap
metal was returned to the U.S. as ships' ballast to conserve costs.....
"The Office of Foreign Liquidation offered $40 million worth of salable aircraft to the European market. At the same time, non-salable combat planes of the AAF 'were being demolished'....
"Naturally, there was criticism overseas as well as in this country...Pandit Jawaharial Nehru * was particularly incensed...and stated in May 1946, 'This is sheer vandalism...In a world, and in India especially, suffering a terrible lack of consumer goods, to destroy what can be used appears almost criminal.'  Of course, he was speaking of more than aviation material....
"It had been determined earlier that it was more expensive to dismantle a plane for parts than to melt it down for salvage....After the engines, propellers, armament,  instruments, and radios,
etc ** were removed, each plane was cut into small pieces that could be pushed into a large furnace.
"Once the possibility of smashing and burning had been demonstrated, arrangements were made for bids on a total of 20,690 aircraft at five WAA fields....Although the primary purpose
at this time was storage...salvage process became a model demonstration for Congress and the press. New Consolidated B-32 Dominators from the factory at Fort Worth were flown to 
Walnut Ridge and were reported to be broken up and melted down.
"....the Washington office ordered the 2.5 to 3 million gallons of gasoline in the planes to be sold separately....After considerable discussion....reversed the decision.
"...this was an important factor in large purchases. When Paul Mantz *** and associates bought 475 planes...in Feb. 1946, the remaining fuel paid for half their cost...."

*Nehru, not Gandhi as I had stated in a previous post. 
** radios removed but shock mountings and control boxes mostly left to be demolished, unfortunately !
***Paul Mantz flew with Amelia Earhart on some jaunts but quit before the ill-fated globe circumnavigation. 

via: Hubert Miller 


From kargo_cult at msn.com  Wed Feb 20 16:35:14 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Wed, 20 Feb 2019 21:35:14 +0000
Subject: [Milsurplus] Ham ads DL - CQ 1949
In-Reply-To: <D483812B-CAB2-4C2D-924B-8776508D1B48@n1k.org>
References: <MWHPR14MB14857764BDD0054D2F08A1D8E4630@MWHPR14MB1485.namprd14.prod.outlook.com>
	<D483812B-CAB2-4C2D-924B-8776508D1B48@n1k.org>
Message-ID: <MWHPR14MB148569633205B0E6243E3B27E47D0@MWHPR14MB1485.namprd14.prod.outlook.com>

Yes. Interesting comments.
I read that in Europe, once the front had passed, and immediate great danger had receded, civilians turned out in force to strip vehicles of whatever they could remove.
With all the junk, like disabled vehicles lying around, "dumpster diving" was probably pretty easy. But as you say, how to get it home ? And the lower your rank, the more
difficult.
I have also been interested in how equipment found its way to the civilian market. 
Some of it was "leakage"; stuff somehow "leaked out" from the military; somehow "written off" or "expended in use". Sometimes this was all for the good, as when maybe
for example, some manuals were kept by an administrator for his own collection rather than being destroyed when obsoleted.
I recall about a decade ago on Ebay was a GRC-9 set; the seller said something like, his brother had gotten it from the National Guard. No, not "bid on" or "MARS program".
I also back during the "gas emergency" of around 1976, I heard talk of National Guard gasoline ending up in Guard members' own cars.
I do NOT mean by this to deprecate our fine military, which in many ways is the pillar of American values, just to mention some problems. 
-Hue 

>Subject: Re: [Milsurplus] Ham ads DL - CQ 1949

HI

To whatever extent surplus radio gear showed up here in the US, it also showed up?
a *lot* in places like Europe. It was already over there lying around :) ?The cost of?
packing it back up and hauling it home ?.. yikes ?.. Even more so when ?new in the
box? equivalents were sitting in warehouses ?back home?.?

Just how any of it went from ?government property? to ?in my basement? always is an?
interesting sort of question. One would guess that dumpster diving was one of many?
ways it happened ?.?

Bob



From navy.radio at gmail.com  Wed Feb 20 17:00:45 2019
From: navy.radio at gmail.com (Nick England)
Date: Wed, 20 Feb 2019 17:00:45 -0500
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near
	Boston
In-Reply-To: <1550692386950.11606@w2hx.com>
References: <943106671.2431940.1550687068980.ref@mail.yahoo.com>
	<943106671.2431940.1550687068980@mail.yahoo.com>
	<1550692386950.11606@w2hx.com>
Message-ID: <CAB55hNf-C7OmO95DT36r=Z=C1C4tuJt1UyZxNEJkH+R1A7xmCQ@mail.gmail.com>

The parts list says it has UG-58A/U connectors. Everything I can find says
that is a 50 ohm connector.
I think all the military type N listings are 50 ohm.
Nick England K4NYW
www.navy-radio.com


On Wed, Feb 20, 2019 at 2:56 PM W2HX <w2hx at w2hx.com> wrote:

> John et al.,
>
> This is an interesting multicoupler. One interesting thing I've wondered
> about...It has a 70 ohm antenna matching input impedance. And i always
> wondered if the antenna connector was a 75 ohm N connector or the standard
> 50 ohm. (The difference is that the male center pin is thicker on the 50
> ohm version, and will damage a 75 ohm female part)
> Just something to look out for.
>
> Wikipedia has a nice photo of both impedances and genders.
>
> 73 Eugene W2HX
>
> ________________________________________
> From: boatanchors-bounces at mailman.qth.net <
> boatanchors-bounces at mailman.qth.net> on behalf of John Flood via
> Boatanchors <boatanchors at mailman.qth.net>
> Sent: Wednesday, February 20, 2019 1:24 PM
> To: MilSurplus QSLNet; r-390 at mailman.qth.net; BOATANCHORS2 LIST
> Subject: [Boatanchors] CU-872A/U antenna coupler FS near Boston
>
> Greetings,
> This is working, some "test" readings are a bit on the low side so perhaps
> some of the 6922 tubes are getting tired.  There is some glue residue below
> the normal data tag most likely from some other data tag that was mounted
> there.  Looking for a local sale in the Metrowest or North Shore Boston
> (This of course means that the first reply will come from Alaska!).  I'm
> not really interested in shipping this or dealing with Paypal any more in
> MA.  Any interest?  I could bring it to the Lewiston ME, Nashua, NH, or
> Framingham, MA fleas.  Nearfest as well but I hope it finds a home sooner
> than May!
> John Flood N1JAF978-979-2807
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Gary Harmon, K5JWK
> ** For Assistance: gharmon at idworld.net **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w2hx at w2hx.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
>
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>
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From w2hx at w2hx.com  Wed Feb 20 18:50:41 2019
From: w2hx at w2hx.com (W2HX)
Date: Wed, 20 Feb 2019 23:50:41 +0000
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near
 Boston
Message-ID: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>

Probably the gain in the unit compensated for any losses due to impedance mismatch

Sent from Nine<http://www.9folders.com/>
________________________________
From: Nick England <navy.radio at gmail.com>
Sent: Wednesday, February 20, 2019 5:00 PM
To: W2HX
Cc: MilSurplus QSLNet; r-390 at mailman.qth.net; John Flood
Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston

The parts list says it has UG-58A/U connectors. Everything I can find says that is a 50 ohm connector.
I think all the military type N listings are 50 ohm.
Nick England K4NYW
www.navy-radio.com<http://www.navy-radio.com>


On Wed, Feb 20, 2019 at 2:56 PM W2HX <w2hx at w2hx.com<mailto:w2hx at w2hx.com>> wrote:
John et al.,

This is an interesting multicoupler. One interesting thing I've wondered about...It has a 70 ohm antenna matching input impedance. And i always wondered if the antenna connector was a 75 ohm N connector or the standard 50 ohm. (The difference is that the male center pin is thicker on the 50 ohm version, and will damage a 75 ohm female part)
Just something to look out for.

Wikipedia has a nice photo of both impedances and genders.

73 Eugene W2HX

________________________________________
From: boatanchors-bounces at mailman.qth.net<mailto:boatanchors-bounces at mailman.qth.net> <boatanchors-bounces at mailman.qth.net<mailto:boatanchors-bounces at mailman.qth.net>> on behalf of John Flood via Boatanchors <boatanchors at mailman.qth.net<mailto:boatanchors at mailman.qth.net>>
Sent: Wednesday, February 20, 2019 1:24 PM
To: MilSurplus QSLNet; r-390 at mailman.qth.net<mailto:r-390 at mailman.qth.net>; BOATANCHORS2 LIST
Subject: [Boatanchors] CU-872A/U antenna coupler FS near Boston

Greetings,
This is working, some "test" readings are a bit on the low side so perhaps some of the 6922 tubes are getting tired.  There is some glue residue below the normal data tag most likely from some other data tag that was mounted there.  Looking for a local sale in the Metrowest or North Shore Boston (This of course means that the first reply will come from Alaska!).  I'm not really interested in shipping this or dealing with Paypal any more in MA.  Any interest?  I could bring it to the Lewiston ME, Nashua, NH, or Framingham, MA fleas.  Nearfest as well but I hope it finds a home sooner than May!
John Flood N1JAF978-979-2807
______________________________________________________________
Boatanchors mailing list
Home: http://mailman.qth.net/mailman/listinfo/boatanchors
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Boatanchors at mailman.qth.net<mailto:Boatanchors at mailman.qth.net>

List Administrator: Gary Harmon, K5JWK
** For Assistance: gharmon at idworld.net<mailto:gharmon at idworld.net> **


This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to w2hx at w2hx.com<mailto:w2hx at w2hx.com>
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From kb8tq at n1k.org  Wed Feb 20 19:04:27 2019
From: kb8tq at n1k.org (Bob kb8tq)
Date: Wed, 20 Feb 2019 19:04:27 -0500
Subject: [Milsurplus] Ham ads DL - CQ 1949
In-Reply-To: <MWHPR14MB148569633205B0E6243E3B27E47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB14857764BDD0054D2F08A1D8E4630@MWHPR14MB1485.namprd14.prod.outlook.com>
	<D483812B-CAB2-4C2D-924B-8776508D1B48@n1k.org>
	<MWHPR14MB148569633205B0E6243E3B27E47D0@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <673785E4-E3BA-422F-B8C5-A52C99C6F661@n1k.org>

Hi

The same process you describe on the planes also applied to other categories 
of ?stuff?. An HRO from 1938 likely was not on the list of things to hang onto. It
also may have been non-functional when checked over. Off it goes into the pile 
to be turned into frying pans. Somehow somewhere along the route to the smelter 
it gets diverted  ?.. It may have been the way the haulers got paid. 

Bob

> On Feb 20, 2019, at 4:35 PM, Hubert Miller <Kargo_cult at msn.com> wrote:
> 
> Yes. Interesting comments.
> I read that in Europe, once the front had passed, and immediate great danger had receded, civilians turned out in force to strip vehicles of whatever they could remove.
> With all the junk, like disabled vehicles lying around, "dumpster diving" was probably pretty easy. But as you say, how to get it home ? And the lower your rank, the more
> difficult.
> I have also been interested in how equipment found its way to the civilian market. 
> Some of it was "leakage"; stuff somehow "leaked out" from the military; somehow "written off" or "expended in use". Sometimes this was all for the good, as when maybe
> for example, some manuals were kept by an administrator for his own collection rather than being destroyed when obsoleted.
> I recall about a decade ago on Ebay was a GRC-9 set; the seller said something like, his brother had gotten it from the National Guard. No, not "bid on" or "MARS program".
> I also back during the "gas emergency" of around 1976, I heard talk of National Guard gasoline ending up in Guard members' own cars.
> I do NOT mean by this to deprecate our fine military, which in many ways is the pillar of American values, just to mention some problems. 
> -Hue 
> 
>> Subject: Re: [Milsurplus] Ham ads DL - CQ 1949
> 
> HI
> 
> To whatever extent surplus radio gear showed up here in the US, it also showed up 
> a *lot* in places like Europe. It was already over there lying around :)  The cost of 
> packing it back up and hauling it home ?.. yikes ?.. Even more so when ?new in the
> box? equivalents were sitting in warehouses ?back home?. 
> 
> Just how any of it went from ?government property? to ?in my basement? always is an 
> interesting sort of question. One would guess that dumpster diving was one of many 
> ways it happened ?. 
> 
> Bob
> 
> 
> ______________________________________________________________
> 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 frledda at att.net  Wed Feb 20 19:08:48 2019
From: frledda at att.net (Francesco Ledda)
Date: Wed, 20 Feb 2019 18:08:48 -0600
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near
	Boston
In-Reply-To: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>
References: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>
Message-ID: <A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>

Also, the CU-1099/FRR is 70 ohm. It was used with receivers with Z 50 ohm.  Wonder why....

Sent from my iPad

> On Feb 20, 2019, at 17:50, W2HX <w2hx at w2hx.com> wrote:
> 
> Probably the gain in the unit compensated for any losses due to impedance mismatch
> 
> Sent from Nine
> From: Nick England <navy.radio at gmail.com>
> Sent: Wednesday, February 20, 2019 5:00 PM
> To: W2HX
> Cc: MilSurplus QSLNet; r-390 at mailman.qth.net; John Flood
> Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston
> 
> The parts list says it has UG-58A/U connectors. Everything I can find says that is a 50 ohm connector.
> I think all the military type N listings are 50 ohm.
> Nick England K4NYW
> www.navy-radio.com
> 
> 
>> On Wed, Feb 20, 2019 at 2:56 PM W2HX <w2hx at w2hx.com> wrote:
>> John et al., 
>> 
>> This is an interesting multicoupler. One interesting thing I've wondered about...It has a 70 ohm antenna matching input impedance. And i always wondered if the antenna connector was a 75 ohm N connector or the standard 50 ohm. (The difference is that the male center pin is thicker on the 50 ohm version, and will damage a 75 ohm female part)
>> Just something to look out for.
>> 
>> Wikipedia has a nice photo of both impedances and genders.
>> 
>> 73 Eugene W2HX
>> 
>> ________________________________________
>> From: boatanchors-bounces at mailman.qth.net <boatanchors-bounces at mailman.qth.net> on behalf of John Flood via Boatanchors <boatanchors at mailman.qth.net>
>> Sent: Wednesday, February 20, 2019 1:24 PM
>> To: MilSurplus QSLNet; r-390 at mailman.qth.net; BOATANCHORS2 LIST
>> Subject: [Boatanchors] CU-872A/U antenna coupler FS near Boston
>> 
>> Greetings,
>> This is working, some "test" readings are a bit on the low side so perhaps some of the 6922 tubes are getting tired.  There is some glue residue below the normal data tag most likely from some other data tag that was mounted there.  Looking for a local sale in the Metrowest or North Shore Boston (This of course means that the first reply will come from Alaska!).  I'm not really interested in shipping this or dealing with Paypal any more in MA.  Any interest?  I could bring it to the Lewiston ME, Nashua, NH, or Framingham, MA fleas.  Nearfest as well but I hope it finds a home sooner than May!
>> John Flood N1JAF978-979-2807
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>> 
>> List Administrator: Gary Harmon, K5JWK
>> ** For Assistance: gharmon at idworld.net **
>> 
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to w2hx at w2hx.com
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> 
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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From w2hx at w2hx.com  Wed Feb 20 19:25:19 2019
From: w2hx at w2hx.com (W2HX)
Date: Thu, 21 Feb 2019 00:25:19 +0000
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near
 Boston
In-Reply-To: <A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>
References: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>,
	<A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>
Message-ID: <7217bc59-930c-43a7-a435-2d45256312cd@w2hx.com>

I think it was more common on the antenna transmission line and transmitter rather than at the receiver. TMC had lots of 70 ohm stuff in their transmitters.

Sent from Nine<http://www.9folders.com/>
________________________________
From: Francesco Ledda <frledda at att.net>
Sent: Wednesday, February 20, 2019 7:08 PM
To: W2HX
Cc: Nick England; John Flood; r-390 at mailman.qth.net; MilSurplus QSLNet
Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston

Also, the CU-1099/FRR is 70 ohm. It was used with receivers with Z 50 ohm.  Wonder why....

Sent from my iPad

On Feb 20, 2019, at 17:50, W2HX <w2hx at w2hx.com<mailto:w2hx at w2hx.com>> wrote:

Probably the gain in the unit compensated for any losses due to impedance mismatch

Sent from Nine<http://www.9folders.com/>
________________________________
From: Nick England <navy.radio at gmail.com<mailto:navy.radio at gmail.com>>
Sent: Wednesday, February 20, 2019 5:00 PM
To: W2HX
Cc: MilSurplus QSLNet; r-390 at mailman.qth.net<mailto:r-390 at mailman.qth.net>; John Flood
Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston

The parts list says it has UG-58A/U connectors. Everything I can find says that is a 50 ohm connector.
I think all the military type N listings are 50 ohm.
Nick England K4NYW
www.navy-radio.com<http://www.navy-radio.com>


On Wed, Feb 20, 2019 at 2:56 PM W2HX <w2hx at w2hx.com<mailto:w2hx at w2hx.com>> wrote:
John et al.,

This is an interesting multicoupler. One interesting thing I've wondered about...It has a 70 ohm antenna matching input impedance. And i always wondered if the antenna connector was a 75 ohm N connector or the standard 50 ohm. (The difference is that the male center pin is thicker on the 50 ohm version, and will damage a 75 ohm female part)
Just something to look out for.

Wikipedia has a nice photo of both impedances and genders.

73 Eugene W2HX

________________________________________
From: boatanchors-bounces at mailman.qth.net<mailto:boatanchors-bounces at mailman.qth.net> <boatanchors-bounces at mailman.qth.net<mailto:boatanchors-bounces at mailman.qth.net>> on behalf of John Flood via Boatanchors <boatanchors at mailman.qth.net<mailto:boatanchors at mailman.qth.net>>
Sent: Wednesday, February 20, 2019 1:24 PM
To: MilSurplus QSLNet; r-390 at mailman.qth.net<mailto:r-390 at mailman.qth.net>; BOATANCHORS2 LIST
Subject: [Boatanchors] CU-872A/U antenna coupler FS near Boston

Greetings,
This is working, some "test" readings are a bit on the low side so perhaps some of the 6922 tubes are getting tired.  There is some glue residue below the normal data tag most likely from some other data tag that was mounted there.  Looking for a local sale in the Metrowest or North Shore Boston (This of course means that the first reply will come from Alaska!).  I'm not really interested in shipping this or dealing with Paypal any more in MA.  Any interest?  I could bring it to the Lewiston ME, Nashua, NH, or Framingham, MA fleas.  Nearfest as well but I hope it finds a home sooner than May!
John Flood N1JAF978-979-2807
______________________________________________________________
Boatanchors mailing list
Home: http://mailman.qth.net/mailman/listinfo/boatanchors
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Boatanchors at mailman.qth.net<mailto:Boatanchors at mailman.qth.net>

List Administrator: Gary Harmon, K5JWK
** For Assistance: gharmon at idworld.net<mailto:gharmon at idworld.net> **


This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to w2hx at w2hx.com<mailto:w2hx at w2hx.com>
______________________________________________________________
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From antqradio at sbcglobal.net  Wed Feb 20 23:52:56 2019
From: antqradio at sbcglobal.net (Jim Whartenby)
Date: Thu, 21 Feb 2019 04:52:56 +0000 (UTC)
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS
	near	Boston
In-Reply-To: <A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>
References: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>
	<A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>
Message-ID: <1953615704.2749940.1550724776302@mail.yahoo.com>

Frank asked: "Wonder why?"
Most likely since at HF, the impedance mismatch is pretty much insignificant, especially if one considers the length of the coax run from antenna to RX.??https://www.pasternack.com/images/ProductPDF/RG8A-U.pdf?So about 1 dB loss at 30 mc per 100 feet or 0.2 db loss at 1 mc per 100 feet.
From:?http://wc7i.com/Vertical%20Antenna%20Conclusions.htm
Z of a vertical antenna is about 36 ohms, Z of horizontal antenna is about 72 ohms, both give a 1.4:1 VSWR.? The VSWR from mating a 50 to 75 ohm coax is 1.5:1? In all of the above cases, the load mismatch attenuation is under 0.2 dB
Comparing UHF connectors to most modern connectors is also interesting.? I myself wonder why the the UHF connector is still used?See:?https://www.hamradio.me/connectors/uhf-connector-test-results.html?for connector comparisons from SMA to UHF.Regards,Jim
I wonder why people argue over the 10% of their differences and ignore the 90% they agree on? 

    On Wednesday, February 20, 2019, 6:09:03 PM CST, Francesco Ledda <frledda at att.net> wrote:  
 
 Also, the CU-1099/FRR is 70 ohm. It was used with receivers with Z 50 ohm. ?Wonder why....

Sent from my iPad
On Feb 20, 2019, at 17:50, W2HX <w2hx at w2hx.com> wrote:



Probably the gain in the unit compensated for any losses due to impedance mismatch

Sent from Nine
From: Nick England <navy.radio at gmail.com>
Sent: Wednesday, February 20, 2019 5:00 PM
To: W2HX
Cc: MilSurplus QSLNet; r-390 at mailman.qth.net; John Flood
Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston

The parts list says it has UG-58A/U connectors. Everything I can find says that is a 50 ohm connector.I think all the military type N listings are 50 ohm.
Nick England K4NYW
www.navy-radio.com


On Wed, Feb 20, 2019 at 2:56 PM W2HX <w2hx at w2hx.com> wrote:

John et al., 

This is an interesting multicoupler. One interesting thing I've wondered about...It has a 70 ohm antenna matching input impedance. And i always wondered if the antenna connector was a 75 ohm N connector or the standard 50 ohm. (The difference is that the male center pin is thicker on the 50 ohm version, and will damage a 75 ohm female part)
Just something to look out for.

Wikipedia has a nice photo of both impedances and genders.

73 Eugene W2HX

________________________________________
From: boatanchors-bounces at mailman.qth.net <boatanchors-bounces at mailman.qth.net> on behalf of John Flood via Boatanchors <boatanchors at mailman.qth.net>
Sent: Wednesday, February 20, 2019 1:24 PM
To: MilSurplus QSLNet; r-390 at mailman.qth.net; BOATANCHORS2 LIST
Subject: [Boatanchors] CU-872A/U antenna coupler FS near Boston

Greetings,
This is working, some "test" readings are a bit on the low side so perhaps some of the 6922 tubes are getting tired.? There is some glue residue below the normal data tag most likely from some other data tag that was mounted there.? Looking for a local sale in the Metrowest or North Shore Boston (This of course means that the first reply will come from Alaska!).? I'm not really interested in shipping this or dealing with Paypal any more in MA.? Any interest?? I could bring it to the Lewiston ME, Nashua, NH, or Framingham, MA fleas.? Nearfest as well but I hope it finds a home sooner than May!
John Flood N1JAF978-979-2807
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From wa5cab at cs.com  Thu Feb 21 01:26:15 2019
From: wa5cab at cs.com (Robert Downs)
Date: Thu, 21 Feb 2019 00:26:15 -0600
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler
	FS	near	Boston
In-Reply-To: <1953615704.2749940.1550724776302@mail.yahoo.com>
References: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>	<A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>
	<1953615704.2749940.1550724776302@mail.yahoo.com>
Message-ID: <015201d4c9ae$59676db0$0c364910$@com>

As for why UHF connectors are still used, I can think of several reasons:

 

1.       They are cheaper than Type N.

2.       They are more rugged than Type N.

3.       They are easier for unskilled labor to assemble well enough that they will work.

4.       There is a huge installed base.

 

Robert Downs

 

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Jim Whartenby
Sent: Wednesday, February 20, 2019 22:53
To: Francesco Ledda
Cc: MilSurplus QSLNet
Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston

 

Comparing UHF connectors to most modern connectors is also interesting.  I myself wonder why the the UHF connector is still used?

See: https://www.hamradio.me/connectors/uhf-connector-test-results.html for connector comparisons from SMA to UHF.

Regards,

Jim

 

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From frledda at att.net  Thu Feb 21 10:56:26 2019
From: frledda at att.net (Francesco Ledda)
Date: Thu, 21 Feb 2019 09:56:26 -0600
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler
	FS	near	Boston
In-Reply-To: <1953615704.2749940.1550724776302@mail.yahoo.com>
References: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>	<A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>
	<1953615704.2749940.1550724776302@mail.yahoo.com>
Message-ID: <004a01d4c9fe$01127510$03375f30$@att.net>

I understand the mismatch and its engineering implications.

 

My question is why would anybody design mismatch in the system.  Most transmitters used an antenna coupler anyway.

 

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Jim Whartenby
Sent: Wednesday, February 20, 2019 10:53 PM
To: Francesco Ledda <frledda at att.net>
Cc: MilSurplus QSLNet <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston

 

Frank asked: "Wonder why?"

 

Most likely since at HF, the impedance mismatch is pretty much insignificant, especially if one considers the length of the coax run from antenna to RX.  https://www.pasternack.com/images/ProductPDF/RG8A-U.pdf 

So about 1 dB loss at 30 mc per 100 feet or 0.2 db loss at 1 mc per 100 feet.

 

From: http://wc7i.com/Vertical%20Antenna%20Conclusions.htm

 

Z of a vertical antenna is about 36 ohms, Z of horizontal antenna is about 72 ohms, both give a 1.4:1 VSWR.  The VSWR from mating a 50 to 75 ohm coax is 1.5:1  In all of the above cases, the load mismatch attenuation is under 0.2 dB

 

Comparing UHF connectors to most modern connectors is also interesting.  I myself wonder why the the UHF connector is still used?

See: https://www.hamradio.me/connectors/uhf-connector-test-results.html for connector comparisons from SMA to UHF.

Regards,

Jim

 

I wonder why people argue over the 10% of their differences and ignore the 90% they agree on?

 

 

On Wednesday, February 20, 2019, 6:09:03 PM CST, Francesco Ledda <frledda at att.net <mailto:frledda at att.net> > wrote: 

 

 

Also, the CU-1099/FRR is 70 ohm. It was used with receivers with Z 50 ohm.  Wonder why....

Sent from my iPad


On Feb 20, 2019, at 17:50, W2HX <w2hx at w2hx.com <mailto:w2hx at w2hx.com> > wrote:

Probably the gain in the unit compensated for any losses due to impedance mismatch

 

Sent from  <http://www.9folders.com/> Nine

  _____  

From: Nick England <navy.radio at gmail.com <mailto:navy.radio at gmail.com> >
Sent: Wednesday, February 20, 2019 5:00 PM
To: W2HX
Cc: MilSurplus QSLNet; r-390 at mailman.qth.net <mailto:r-390 at mailman.qth.net> ; John Flood
Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston

 

The parts list says it has UG-58A/U connectors. Everything I can find says that is a 50 ohm connector.

I think all the military type N listings are 50 ohm.

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

 

 

On Wed, Feb 20, 2019 at 2:56 PM W2HX <w2hx at w2hxcom <mailto:w2hx at w2hx.com> > wrote:

John et al., 

This is an interesting multicoupler. One interesting thing I've wondered about...It has a 70 ohm antenna matching input impedance. And i always wondered if the antenna connector was a 75 ohm N connector or the standard 50 ohm (The difference is that the male center pin is thicker on the 50 ohm version, and will damage a 75 ohm female part)
Just something to look out for.

Wikipedia has a nice photo of both impedances and genders.

73 Eugene W2HX

________________________________________
From: boatanchors-bounces at mailman.qth.net <mailto:boatanchors-bounces at mailman.qth.net>  <boatanchors-bounces at mailman.qth.net <mailto:boatanchors-bounces at mailman.qth.net> > on behalf of John Flood via Boatanchors <boatanchors at mailman.qth.net <mailto:boatanchors at mailman.qth.net> >
Sent: Wednesday, February 20, 2019 1:24 PM
To: MilSurplus QSLNet; r-390 at mailman.qth.net <mailto:r-390 at mailman.qth.net> ; BOATANCHORS2 LIST
Subject: [Boatanchors] CU-872A/U antenna coupler FS near Boston

Greetings,
This is working, some "test" readings are a bit on the low side so perhaps some of the 6922 tubes are getting tired.  There is some glue residue below the normal data tag most likely from some other data tag that was mounted there.  Looking for a local sale in the Metrowest or North Shore Boston (This of course means that the first reply will come from Alaska!).  I'm not really interested in shipping this or dealing with Paypal any more in MA.  Any interest?  I could bring it to the Lewiston ME, Nashua, NH, or Framingham, MA fleas.  Nearfest as well but I hope it finds a home sooner than May!
John Flood N1JAF978-979-2807
______________________________________________________________
Boatanchors mailing list
Home: http://mailman.qth.net/mailman/listinfo/boatanchors
Help: http://mailman.qth.net/mmfaq.htm
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List Administrator: Gary Harmon, K5JWK
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From kb2vtl at gmail.com  Thu Feb 21 11:04:23 2019
From: kb2vtl at gmail.com (Peter Gottlieb)
Date: Thu, 21 Feb 2019 11:04:23 -0500
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS	near
	Boston
In-Reply-To: <004a01d4c9fe$01127510$03375f30$@att.net>
References: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>
	<A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>
	<1953615704.2749940.1550724776302@mail.yahoo.com>
	<004a01d4c9fe$01127510$03375f30$@att.net>
Message-ID: <7038904E-18A1-4B2F-AA89-43A3F4B1A592@gmail.com>

Multi couplers are for receivers, and isn?t the optimum coax impedance around 70 ohms for signal loss?  The optimum for power transmission is closer to 50 ohms IIRC. These were made some time ago, perhaps before 50 ohms was settled on as the standard for radio gear except CATV systems. Just trying to think out loud why those things were 70 ohms. 


Peter

> On Feb 21, 2019, at 10:56 AM, Francesco Ledda <frledda at att.net> wrote:
> 
> I understand the mismatch and its engineering implications.
>  
> My question is why would anybody design mismatch in the system.  Most transmitters used an antenna coupler anyway.
>  
> From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Jim Whartenby
> Sent: Wednesday, February 20, 2019 10:53 PM
> To: Francesco Ledda <frledda at att.net>
> Cc: MilSurplus QSLNet <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston
>  
> Frank asked: "Wonder why?"
>  
> Most likely since at HF, the impedance mismatch is pretty much insignificant, especially if one considers the length of the coax run from antenna to RX.  https://www.pasternack.com/images/ProductPDF/RG8A-U.pdf 
> So about 1 dB loss at 30 mc per 100 feet or 0.2 db loss at 1 mc per 100 feet.
>  
> From: http://wc7i.com/Vertical%20Antenna%20Conclusions.htm
>  
> Z of a vertical antenna is about 36 ohms, Z of horizontal antenna is about 72 ohms, both give a 1.4:1 VSWR.  The VSWR from mating a 50 to 75 ohm coax is 1.5:1  In all of the above cases, the load mismatch attenuation is under 0.2 dB
>  
> Comparing UHF connectors to most modern connectors is also interesting.  I myself wonder why the the UHF connector is still used?
> See: https://www.hamradio.me/connectors/uhf-connector-test-results.html for connector comparisons from SMA to UHF.
> Regards,
> Jim
>  
> I wonder why people argue over the 10% of their differences and ignore the 90% they agree on?
>  
>  
> On Wednesday, February 20, 2019, 6:09:03 PM CST, Francesco Ledda <frledda at att.net> wrote:
>  
>  
> Also, the CU-1099/FRR is 70 ohm. It was used with receivers with Z 50 ohm.  Wonder why....
> 
> Sent from my iPad
> 
> On Feb 20, 2019, at 17:50, W2HX <w2hx at w2hx.com> wrote:
> 
> Probably the gain in the unit compensated for any losses due to impedance mismatch
>  
> Sent from Nine
> From: Nick England <navy.radio at gmail.com>
> Sent: Wednesday, February 20, 2019 5:00 PM
> To: W2HX
> Cc: MilSurplus QSLNet; r-390 at mailman.qth.net; John Flood
> Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston
>  
> The parts list says it has UG-58A/U connectors. Everything I can find says that is a 50 ohm connector.
> I think all the military type N listings are 50 ohm.
> Nick England K4NYW
> www.navy-radio.com
>  
>  
> On Wed, Feb 20, 2019 at 2:56 PM W2HX <w2hx at w2hxcom> wrote:
> John et al., 
> 
> This is an interesting multicoupler. One interesting thing I've wondered about...It has a 70 ohm antenna matching input impedance. And i always wondered if the antenna connector was a 75 ohm N connector or the standard 50 ohm (The difference is that the male center pin is thicker on the 50 ohm version, and will damage a 75 ohm female part)
> Just something to look out for.
> 
> Wikipedia has a nice photo of both impedances and genders.
> 
> 73 Eugene W2HX
> 
> ________________________________________
> From: boatanchors-bounces at mailman.qth.net <boatanchors-bounces at mailman.qth.net> on behalf of John Flood via Boatanchors <boatanchors at mailman.qth.net>
> Sent: Wednesday, February 20, 2019 1:24 PM
> To: MilSurplus QSLNet; r-390 at mailman.qth.net; BOATANCHORS2 LIST
> Subject: [Boatanchors] CU-872A/U antenna coupler FS near Boston
> 
> Greetings,
> This is working, some "test" readings are a bit on the low side so perhaps some of the 6922 tubes are getting tired.  There is some glue residue below the normal data tag most likely from some other data tag that was mounted there.  Looking for a local sale in the Metrowest or North Shore Boston (This of course means that the first reply will come from Alaska!).  I'm not really interested in shipping this or dealing with Paypal any more in MA.  Any interest?  I could bring it to the Lewiston ME, Nashua, NH, or Framingham, MA fleas.  Nearfest as well but I hope it finds a home sooner than May!
> John Flood N1JAF978-979-2807
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
> 
> List Administrator: Gary Harmon, K5JWK
> ** For Assistance: gharmon at idworld.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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> ______________________________________________________________
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From frledda at att.net  Thu Feb 21 11:55:23 2019
From: frledda at att.net (Francesco Ledda)
Date: Thu, 21 Feb 2019 10:55:23 -0600
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler
	FS	near	Boston
In-Reply-To: <7038904E-18A1-4B2F-AA89-43A3F4B1A592@gmail.com>
References: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>	<A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>	<1953615704.2749940.1550724776302@mail.yahoo.com>	<004a01d4c9fe$01127510$03375f30$@att.net>
	<7038904E-18A1-4B2F-AA89-43A3F4B1A592@gmail.com>
Message-ID: <007101d4ca06$3d519bc0$b7f4d340$@att.net>

Of course, the transmitter has its own tunable coupler, and all the TX couplers I have seen tune  the antenna to 50 ohm.

 

It may be that older ships had 70 ohm transmission lines and they stick with 70 ohm for historical reason.  

 

In the 80s, I know that many NATO ships mostly used high temperature Teflon insulated RG-115, and it was 50 ohm.

 

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Peter Gottlieb
Sent: Thursday, February 21, 2019 10:04 AM
To: Francesco Ledda <frledda at att.net>
Cc: MilSurplus QSLNet <milsurplus at mailman.qth.net>; Jim Whartenby <antqradio at sbcglobal.net>
Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston

 

Multi couplers are for receivers, and isn?t the optimum coax impedance around 70 ohms for signal loss?  The optimum for power transmission is closer to 50 ohms IIRC. These were made some time ago, perhaps before 50 ohms was settled on as the standard for radio gear except CATV systems. Just trying to think out loud why those things were 70 ohms. 

 

Peter


On Feb 21, 2019, at 10:56 AM, Francesco Ledda <frledda at att.net <mailto:frledda at att.net> > wrote:

I understand the mismatch and its engineering implications.

 

My question is why would anybody design mismatch in the system.  Most transmitters used an antenna coupler anyway.

 

From: milsurplus-bounces at mailmanqth.net <mailto:milsurplus-bounces at mailman.qth.net>  <milsurplus-bounces at mailman.qth.net <mailto:milsurplus-bounces at mailman.qth.net> > On Behalf Of Jim Whartenby
Sent: Wednesday, February 20, 2019 10:53 PM
To: Francesco Ledda <frledda at att.net <mailto:frledda at att.net> >
Cc: MilSurplus QSLNet <milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net> >
Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston

 

Frank asked: "Wonder why?"

 

Most likely since at HF, the impedance mismatch is pretty much insignificant, especially if one considers the length of the coax run from antenna to RX.  https://www.pasternack.com/images/ProductPDF/RG8A-U.pdf 

So about 1 dB loss at 30 mc per 100 feet or 0.2 db loss at 1 mc per 100 feet.

 

From: http://wc7i.com/Vertical%20Antenna%20Conclusions.htm

 

Z of a vertical antenna is about 36 ohms, Z of horizontal antenna is about 72 ohms, both give a 1.4:1 VSWR.  The VSWR from mating a 50 to 75 ohm coax is 1.5:1  In all of the above cases, the load mismatch attenuation is under 0.2 dB

 

Comparing UHF connectors to most modern connectors is also interesting.  I myself wonder why the the UHF connector is still used?

See: https://www.hamradio.me/connectors/uhf-connector-test-results.html for connector comparisons from SMA to UHF.

Regards,

Jim

 

I wonder why people argue over the 10% of their differences and ignore the 90% they agree on?

 

 

On Wednesday, February 20, 2019, 6:09:03 PM CST, Francesco Ledda <frledda at att.net <mailto:frledda at att.net> > wrote: 

 

 

Also, the CU-1099/FRR is 70 ohm. It was used with receivers with Z 50 ohm.  Wonder why....

Sent from my iPad


On Feb 20, 2019, at 17:50, W2HX <w2hx at w2hx.com <mailto:w2hx at w2hx.com> > wrote:

Probably the gain in the unit compensated for any losses due to impedance mismatch

 

Sent from  <http://www.9folderscom/> Nine


  _____  


From: Nick England <navy.radio at gmail.com <mailto:navy.radio at gmail.com> >
Sent: Wednesday, February 20, 2019 5:00 PM
To: W2HX
Cc: MilSurplus QSLNet; r-390 at mailman.qth.net <mailto:r-390 at mailman.qth.net> ; John Flood
Subject: Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near Boston

 

The parts list says it has UG-58A/U connectors. Everything I can find says that is a 50 ohm connector.

I think all the military type N listings are 50 ohm.

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

 

 

On Wed, Feb 20, 2019 at 2:56 PM W2HX <w2hx at w2hxcom <mailto:w2hx at w2hx.com> > wrote:

John et al., 

This is an interesting multicoupler. One interesting thing I've wondered about...It has a 70 ohm antenna matching input impedance. And i always wondered if the antenna connector was a 75 ohm N connector or the standard 50 ohm (The difference is that the male center pin is thicker on the 50 ohm version, and will damage a 75 ohm female part)
Just something to look out for.

Wikipedia has a nice photo of both impedances and genders.

73 Eugene W2HX

________________________________________
From: boatanchors-bounces at mailman.qth.net <mailto:boatanchors-bounces at mailman.qth.net>  <boatanchors-bounces at mailman.qth.net <mailto:boatanchors-bounces at mailman.qth.net> > on behalf of John Flood via Boatanchors <boatanchors at mailman.qth.net <mailto:boatanchors at mailman.qth.net> >
Sent: Wednesday, February 20, 2019 1:24 PM
To: MilSurplus QSLNet; r-390 at mailman.qth.net; BOATANCHORS2 LIST
Subject: [Boatanchors] CU-872A/U antenna coupler FS near Boston

Greetings,
This is working, some "test" readings are a bit on the low side so perhaps some of the 6922 tubes are getting tired.  There is some glue residue below the normal data tag most likely from some other data tag that was mounted there.  Looking for a local sale in the Metrowest or North Shore Boston (This of course means that the first reply will come from Alaska!).  I'm not really interested in shipping this or dealing with Paypal any more in MA.  Any interest?  I could bring it to the Lewiston ME, Nashua, NH, or Framingham, MA fleas.  Nearfest as well but I hope it finds a home sooner than May!
John Flood N1JAF978-979-2807
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List Administrator: Gary Harmon, K5JWK
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Please help support this email list: http://www.qsl.net/donate.html

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From antqradio at sbcglobal.net  Thu Feb 21 14:20:23 2019
From: antqradio at sbcglobal.net (Jim Whartenby)
Date: Thu, 21 Feb 2019 19:20:23 +0000 (UTC)
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler
	FS	near	Boston
In-Reply-To: <007101d4ca06$3d519bc0$b7f4d340$@att.net>
References: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>
	<A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>
	<1953615704.2749940.1550724776302@mail.yahoo.com>
	<004a01d4c9fe$01127510$03375f30$@att.net>
	<7038904E-18A1-4B2F-AA89-43A3F4B1A592@gmail.com>
	<007101d4ca06$3d519bc0$b7f4d340$@att.net>
Message-ID: <1177114022.3154747.1550776823253@mail.yahoo.com>

Blame Bell Labs for the coax impedance compromise.??See:?https://www.belden.com/blog/broadcast/50-Ohms-The-Forgotten-Impedance
Best impedance for power transmission: 30 ohms
Best impedance to withstand high voltage: 60 ohmsBest impedance for lowest loss: 75 ohmsThe BTL compromise impedance considering all of the above: 50 ohms
As already mentioned:Impedance of a vertical antenna is about 36 ohmsImpedance of horizontal antenna is about 72 ohmsHum, a two to one difference in impedance between these two antennas.....
Mismatch loss between 36 ohms and 50 ohms: 0.177 dB with a VSWR of 1.389 : 1Mismatch loss between 36 ohms and 75 ohms: 0.572 dB with a VSWR of 2.083 : 1Mismatch loss between 50 ohms and 75 ohms: 0.177 dB with a VSWR of 1.50 : 1Mismatch loss between 72 ohms and 75 ohms: 0.002 dB with a VSWR of 1.042 : 1So the compromise impedance holds for either a vertical or horizontal antenna impedance and a 50 ohm transmission line.? Depending on frequency and cable length, RG-8 attenuation loss could easily mask the mismatch losses of the above.

Can't calculate the Mismatch Loss and VSWR for the UHF connector since the impedance of the connector is not controlled; it could be anything.? Which makes the initial mismatch loss concern between 75 and 50 ohm cables connecting to the CU-872A/U antenna coupler meaningless if UHF connectors are used.?
BTW, the eBay price of UHF and N connectors is $2 v $4.44, not all that much of a difference IMHO.
Regards,Jim







  
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From ark at ar88.net  Thu Feb 21 17:32:44 2019
From: ark at ar88.net (Al Klase)
Date: Thu, 21 Feb 2019 17:32:44 -0500
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near
 Boston
In-Reply-To: <1177114022.3154747.1550776823253@mail.yahoo.com>
References: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>
	<A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>
	<1953615704.2749940.1550724776302@mail.yahoo.com>
	<004a01d4c9fe$01127510$03375f30$@att.net>
	<7038904E-18A1-4B2F-AA89-43A3F4B1A592@gmail.com>
	<007101d4ca06$3d519bc0$b7f4d340$@att.net>
	<1177114022.3154747.1550776823253@mail.yahoo.com>
Message-ID: <0b2b584c-df98-fb96-cc6b-45985d71dca7@ar88.net>

Receiver impedance matching, especially at HF and below, is a lot like 
horseshoes and handgrenades;? All you have to do is come close!

My two cents,
Al

On 2/21/2019 2:20 PM, Jim Whartenby wrote:
> Blame Bell Labs for the coax impedance compromise.
> See: https://www.belden.com/blog/broadcast/50-Ohms-The-Forgotten-Impedance
>
> Best impedance for power transmission: 30 ohms
> Best impedance to withstand high voltage: 60 ohms
> Best impedance for lowest loss: 75 ohms
> The BTL compromise impedance considering all of the above: 50 ohms
>
> As already mentioned:
> Impedance of a vertical antenna is about 36 ohms
> Impedance of horizontal antenna is about 72 ohms
> Hum, a two to one difference in impedance between these two antennas.....
>
> Mismatch loss between 36 ohms and 50 ohms: 0.177 dB with a VSWR of 
> 1.389 : 1
> Mismatch loss between 36 ohms and 75 ohms: 0.572 dB with a VSWR of 
> 2.083 : 1
> Mismatch loss between 50 ohms and 75 ohms: 0.177 dB with a VSWR of 
> 1.50 : 1
> Mismatch loss between 72 ohms and 75 ohms: 0.002 dB with a VSWR of 
> 1.042 : 1
> So the compromise impedance holds for either a vertical or horizontal 
> antenna impedance and a 50 ohm transmission line. Depending on 
> frequency and cable length, RG-8 attenuation loss could easily mask 
> the mismatch losses of the above.
>
> Can't calculate the Mismatch Loss and VSWR for the UHF connector since 
> the impedance of the connector is not controlled; it could be 
> anything.? Which makes the initial mismatch loss concern between 75 
> and 50 ohm cables connecting to the CU-872A/U antenna coupler 
> meaningless if UHF connectors are used.
>
> BTW, the eBay price of UHF and N connectors is $2 v $4.44, not all 
> that much of a difference IMHO.
>
> Regards,
> Jim
>
>
>
> ______________________________________________________________
> 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

-- 
Al Klase ? N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/

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From kargo_cult at msn.com  Thu Feb 21 20:15:48 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Fri, 22 Feb 2019 01:15:48 +0000
Subject: [Milsurplus] Army radio sets 1931
Message-ID: <MWHPR14MB1485D4FD64C00C46058B0CACE47F0@MWHPR14MB1485.namprd14.prod.outlook.com>

"Army Extension Courses No. 97, Field Artillery Signal Communication, Technical Communication", gives one view of Army radio in 1931.
I found this interesting:
The SCR-77B  range given as 5 miles; status = in service
SCR-131, 161 later loop sets, range given as 15 miles, status = in development
SCR-171 same appearance as loop sets but uses "L" wire antenna, range 15 miles.

The latter 2 sets used, per text, in Field Artillery only; first two, both F.A. and infantry at regiment and battalion level.
-Hue
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From kargo_cult at msn.com  Fri Feb 22 00:36:11 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Fri, 22 Feb 2019 05:36:11 +0000
Subject: [Milsurplus] R-1051 starter ?
Message-ID: <MWHPR14MB148583EB92FCAB2EFF9A7764E47F0@MWHPR14MB1485.namprd14.prod.outlook.com>

I received this note from Mark Dinsmore, a fellow member of the NWVRS antique radio collector club in Portland, OR.
My own interest is pretty much WW2. I never cared for the R-1051's tuning system either. Maybe there is someone
closer to his city or really, anywhere, who can get him started on these ?
He is: Mark Dinsmore   <markdinsmore  at gmail .com>

>Hey Hue,

Are you into military communications gear? Some navy gear came my way the other day, a R-1051B/URR and a R-1051G/URR receivers along with a T-827H/URT exciter.

I wonder if you have or know anyone who is interested in these things and would be a good ?elmer? or may have a collection of donor modules and parts.

I think it might be fun to get these going again, if it can be done within reason.

Mark
Sent from my iPhone


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From wa5cab at cs.com  Fri Feb 22 02:05:14 2019
From: wa5cab at cs.com (Robert Downs)
Date: Fri, 22 Feb 2019 01:05:14 -0600
Subject: [Milsurplus] R-1051 starter ?
In-Reply-To: <MWHPR14MB148583EB92FCAB2EFF9A7764E47F0@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB148583EB92FCAB2EFF9A7764E47F0@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <00e201d4ca7c$f6067200$e2135600$@com>

I rather like the R-1051 family.  Unfortunately, I?m some 2000 miles away.  But unfortunately also, he used one of those words (within reason) that for most collectors these days, whether of radios, machine tools, or just about anything else, is really a synonym for ?dirt cheap?.

 

Robert Downs

 

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Hubert Miller
Sent: Thursday, February 21, 2019 23:36
To: milsurplus at qth.net; armyradios at yahoogroups.com
Subject: [Milsurplus] R-1051 starter ?

 

I received this note from Mark Dinsmore, a fellow member of the NWVRS antique radio collector club in Portland, OR. 

My own interest is pretty much WW2. I never cared for the R-1051's tuning system either. Maybe there is someone 

closer to his city or really, anywhere, who can get him started on these ? 

He is: Mark Dinsmore   <markdinsmore  at gmail .com>

 

>Hey Hue,

 

Are you into military communications gear? Some navy gear came my way the other day, a R-1051B/URR and a R-1051G/URR receivers along with a T-827H/URT exciter. 

 

I wonder if you have or know anyone who is interested in these things and would be a good ?elmer? or may have a collection of donor modules and parts. 

 

I think it might be fun to get these going again, if it can be done within reason. 

 

Mark

Sent from my iPhone

 

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From kb8tq at n1k.org  Fri Feb 22 08:23:37 2019
From: kb8tq at n1k.org (Bob kb8tq)
Date: Fri, 22 Feb 2019 08:23:37 -0500
Subject: [Milsurplus] R-1051 starter ?
In-Reply-To: <00e201d4ca7c$f6067200$e2135600$@com>
References: <MWHPR14MB148583EB92FCAB2EFF9A7764E47F0@MWHPR14MB1485.namprd14.prod.outlook.com>
	<00e201d4ca7c$f6067200$e2135600$@com>
Message-ID: <CFE4151D-A245-42D7-AD57-3CAF96FDCFB5@n1k.org>

Hi

There?s also the basic problem that the 1051 series is quite a step up in complexity from the WWII stuff most of us 
have worked on. Getting up to speed on all the various versions and the degree to which parts can or can?t be 
swapped is challenging. Depending on what he has and how badly it has been worked over in the past the process
could be pretty simple, but more likely will be both expensive and time consuming. 

I happen to like the 1051?s, but have tried to keep things focused on a very narrow sub group within that tribe ?.

Bob

> On Feb 22, 2019, at 2:05 AM, Robert Downs via Milsurplus <milsurplus at mailman.qth.net> wrote:
> 
> I rather like the R-1051 family.  Unfortunately, I?m some 2000 miles away.  But unfortunately also, he used one of those words (within reason) that for most collectors these days, whether of radios, machine tools, or just about anything else, is really a synonym for ?dirt cheap?.
>  
> Robert Downs
>  
> From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Hubert Miller
> Sent: Thursday, February 21, 2019 23:36
> To: milsurplus at qth.net; armyradios at yahoogroups.com
> Subject: [Milsurplus] R-1051 starter ?
>  
> I received this note from Mark Dinsmore, a fellow member of the NWVRS antique radio collector club in Portland, OR.
> My own interest is pretty much WW2. I never cared for the R-1051's tuning system either. Maybe there is someone
> closer to his city or really, anywhere, who can get him started on these ?
> He is: Mark Dinsmore   <markdinsmore  at gmail .com>
>  
> >Hey Hue,
>  
> Are you into military communications gear? Some navy gear came my way the other day, a R-1051B/URR and a R-1051G/URR receivers along with a T-827H/URT exciter. 
>  
> I wonder if you have or know anyone who is interested in these things and would be a good ?elmer? or may have a collection of donor modules and parts. 
>  
> I think it might be fun to get these going again, if it can be done within reason. 
>  
> Mark
> 
> Sent from my iPhone
>  
> 
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

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From rpmeadow at bellsouth.net  Fri Feb 22 16:34:59 2019
From: rpmeadow at bellsouth.net (Robert P. Meadows)
Date: Fri, 22 Feb 2019 16:34:59 -0500
Subject: [Milsurplus] R-1051 starter ?
In-Reply-To: <00e201d4ca7c$f6067200$e2135600$@com>
References: <MWHPR14MB148583EB92FCAB2EFF9A7764E47F0@MWHPR14MB1485.namprd14.prod.outlook.com>
	<00e201d4ca7c$f6067200$e2135600$@com>
Message-ID: <084d01d4caf6$7789c470$669d4d50$@bellsouth.net>

Robert, and all,

I have four of the wonderful R1051xx radios that I have grown tired of.  Replacing them with RBB/RBC and FRR59/WRR59s.

They need a home.  All work to some extent, but, I haven?t the patience to pursue.

Bob

904 264 2946

 

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Robert Downs via Milsurplus
Sent: Friday, February 22, 2019 2:05 AM
To: milsurplus at qth.net; armyradios at yahoogroups.com
Subject: Re: [Milsurplus] R-1051 starter ?

 

I rather like the R-1051 family.  Unfortunately, I?m some 2000 miles away.  But unfortunately also, he used one of those words (within reason) that for most collectors these days, whether of radios, machine tools, or just about anything else, is really a synonym for ?dirt cheap?.

 

Robert Downs

 

From: milsurplus-bounces at mailman.qth.net <mailto:milsurplus-bounces at mailman.qth.net>  [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Hubert Miller
Sent: Thursday, February 21, 2019 23:36
To: milsurplus at qth.net <mailto:milsurplus at qth.net> ; armyradios at yahoogroups.com <mailto:armyradios at yahoogroups.com> 
Subject: [Milsurplus] R-1051 starter ?

 

I received this note from Mark Dinsmore, a fellow member of the NWVRS antique radio collector club in Portland, OR. 

My own interest is pretty much WW2. I never cared for the R-1051's tuning system either. Maybe there is someone 

closer to his city or really, anywhere, who can get him started on these ? 

He is: Mark Dinsmore   <markdinsmore  at gmail .com>

 

>Hey Hue,

 

Are you into military communications gear? Some navy gear came my way the other day, a R-1051B/URR and a R-1051G/URR receivers along with a T-827H/URT exciter. 

 

I wonder if you have or know anyone who is interested in these things and would be a good ?elmer? or may have a collection of donor modules and parts. 

 

I think it might be fun to get these going again, if it can be done within reason. 

 

Mark

Sent from my iPhone

 

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From smithab11 at comcast.net  Sat Feb 23 13:30:32 2019
From: smithab11 at comcast.net (B. Smith)
Date: Sat, 23 Feb 2019 13:30:32 -0500
Subject: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS near
 Boston
In-Reply-To: <007101d4ca06$3d519bc0$b7f4d340$@att.net>
References: <864ea386-22f1-4e50-a84c-1be748facfc5@w2hx.com>
	<A9FD4E8E-08B7-4208-81F3-288CFB919F29@att.net>
	<1953615704.2749940.1550724776302@mail.yahoo.com>
	<004a01d4c9fe$01127510$03375f30$@att.net>
	<7038904E-18A1-4B2F-AA89-43A3F4B1A592@gmail.com>
	<007101d4ca06$3d519bc0$b7f4d340$@att.net>
Message-ID: <0132c01f-0414-d43e-3a4d-11eb2e6ba30f@comcast.net>

 ? Perhaps they used 70 ohms to match a half wavelength doublet antenna.
k4che

On 2/21/2019 11:55 AM, Francesco Ledda wrote:
>
> Of course, the transmitter has its own tunable coupler, and all the TX 
> couplers I have seen tune ?the antenna to 50 ohm.
>
> It may be that older ships had 70 ohm transmission lines and they 
> stick with 70 ohm for historical reason.
>
> In the 80s, I know that many NATO ships mostly used high temperature 
> Teflon insulated RG-115, and it was 50 ohm.
>
> *From:* milsurplus-bounces at mailman.qth.net 
> <milsurplus-bounces at mailman.qth.net> *On Behalf Of *Peter Gottlieb
> *Sent:* Thursday, February 21, 2019 10:04 AM
> *To:* Francesco Ledda <frledda at att.net>
> *Cc:* MilSurplus QSLNet <milsurplus at mailman.qth.net>; Jim Whartenby 
> <antqradio at sbcglobal.net>
> *Subject:* Re: [Milsurplus] [Boatanchors] CU-872A/U antenna coupler FS 
> near Boston
>
> Multi couplers are for receivers, and isn?t the optimum coax impedance 
> around 70 ohms for signal loss? ?The optimum for power transmission is 
> closer to 50 ohms IIRC. These were made some time ago, perhaps before 
> 50 ohms was settled on as the standard for radio gear except CATV 
> systems. Just trying to think out loud why those things were 70 ohms.
>
> Peter
>
>
> On Feb 21, 2019, at 10:56 AM, Francesco Ledda <frledda at att.net 
> <mailto:frledda at att.net>> wrote:
>
>     I understand the mismatch and its engineering implications.
>
>     My question is why would anybody design mismatch in the system.?
>     Most transmitters used an antenna coupler anyway.
>
>     *From:* milsurplus-bounces at mailmanqth.net
>     <mailto:milsurplus-bounces at mailman.qth.net>
>     <milsurplus-bounces at mailman.qth.net
>     <mailto:milsurplus-bounces at mailman.qth.net>> *On Behalf Of *Jim
>     Whartenby
>     *Sent:* Wednesday, February 20, 2019 10:53 PM
>     *To:* Francesco Ledda <frledda at att.net <mailto:frledda at att.net>>
>     *Cc:* MilSurplus QSLNet <milsurplus at mailman.qth.net
>     <mailto:milsurplus at mailman.qth.net>>
>     *Subject:* Re: [Milsurplus] [Boatanchors] CU-872A/U antenna
>     coupler FS near Boston
>
>     Frank asked: "Wonder why?"
>
>     Most likely since at HF, the impedance mismatch is pretty much
>     insignificant, especially if one considers the length of the coax
>     run from antenna to RX.
>     https://www.pasternack.com/images/ProductPDF/RG8A-U.pdf
>
>     So about 1 dB loss at 30 mc per 100 feet or 0.2 db loss at 1 mc
>     per 100 feet.
>
>     From: http://wc7i.com/Vertical%20Antenna%20Conclusions.htm
>
>     Z of a vertical antenna is about 36 ohms, Z of horizontal antenna
>     is about 72 ohms, both give a 1.4:1 VSWR.? The VSWR from mating a
>     50 to 75 ohm coax is 1.5:1? In all of the above cases, the load
>     mismatch attenuation is under 0.2 dB
>
>     Comparing UHF connectors to most modern connectors is also
>     interesting.? I myself wonder why the the UHF connector is still used?
>
>     See:
>     https://www.hamradio.me/connectors/uhf-connector-test-results.html?for
>     connector comparisons from SMA to UHF.
>
>     Regards,
>
>     Jim
>
>     /I wonder why people argue over the 10% of their differences and
>     ignore the 90% they agree on?/
>
>     On Wednesday, February 20, 2019, 6:09:03 PM CST, Francesco Ledda
>     <frledda at att.net <mailto:frledda at att.net>> wrote:
>
>     Also, the CU-1099/FRR is 70 ohm. It was used with receivers with Z
>     50 ohm. ?Wonder why....
>
>     Sent from my iPad
>
>
>     On Feb 20, 2019, at 17:50, W2HX <w2hx at w2hx.com
>     <mailto:w2hx at w2hx.com>> wrote:
>
>     Probably the gain in the unit compensated for any losses due to
>     impedance mismatch
>
>     Sent from Nine <http://www.9folderscom/>
>
>     ------------------------------------------------------------------------
>
>     *From:*Nick England <navy.radio at gmail.com
>     <mailto:navy.radio at gmail.com>>
>     *Sent:* Wednesday, February 20, 2019 5:00 PM
>     *To:* W2HX
>     *Cc:* MilSurplus QSLNet; r-390 at mailman.qth.net
>     <mailto:r-390 at mailman.qth.net>; John Flood
>     *Subject:* Re: [Milsurplus] [Boatanchors] CU-872A/U antenna
>     coupler FS near Boston
>
>     The parts list says it has UG-58A/U connectors. Everything I can
>     find says that is a 50 ohm connector.
>
>     I think all the military type N listings are 50 ohm.
>
>     Nick England K4NYW
>     www.navy-radio.com <http://www.navy-radio.com>
>
>     On Wed, Feb 20, 2019 at 2:56 PM W2HX <w2hx at w2hxcom
>     <mailto:w2hx at w2hx.com>> wrote:
>
>         John et al.,
>
>         This is an interesting multicoupler. One interesting thing
>         I've wondered about...It has a 70 ohm antenna matching input
>         impedance. And i always wondered if the antenna connector was
>         a 75 ohm N connector or the standard 50 ohm (The difference is
>         that the male center pin is thicker on the 50 ohm version, and
>         will damage a 75 ohm female part)
>         Just something to look out for.
>
>         Wikipedia has a nice photo of both impedances and genders.
>
>         73 Eugene W2HX
>
>         ________________________________________
>         From: boatanchors-bounces at mailman.qth.net
>         <mailto:boatanchors-bounces at mailman.qth.net>
>         <boatanchors-bounces at mailman.qth.net
>         <mailto:boatanchors-bounces at mailman.qth.net>> on behalf of
>         John Flood via Boatanchors <boatanchors at mailman.qth.net
>         <mailto:boatanchors at mailman.qth.net>>
>         Sent: Wednesday, February 20, 2019 1:24 PM
>         To: MilSurplus QSLNet; r-390 at mailman.qth.net
>         <mailto:r-390 at mailman.qth.net>; BOATANCHORS2 LIST
>         Subject: [Boatanchors] CU-872A/U antenna coupler FS near Boston
>
>         Greetings,
>         This is working, some "test" readings are a bit on the low
>         side so perhaps some of the 6922 tubes are getting tired.?
>         There is some glue residue below the normal data tag most
>         likely from some other data tag that was mounted there.
>         Looking for a local sale in the Metrowest or North Shore
>         Boston (This of course means that the first reply will come
>         from Alaska!).? I'm not really interested in shipping this or
>         dealing with Paypal any more in MA.? Any interest?? I could
>         bring it to the Lewiston ME, Nashua, NH, or Framingham, MA
>         fleas.? Nearfest as well but I hope it finds a home sooner
>         than May!
>         John Flood N1JAF978-979-2807
>         ______________________________________________________________
>         Boatanchors mailing list
>         Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>         Help: http://mailman.qth.net/mmfaq.htm
>         Post: mailto:Boatanchors at mailman.qth.net
>         <mailto:Boatanchors at mailman.qth.net>
>
>         List Administrator: Gary Harmon, K5JWK
>         ** For Assistance: gharmon at idworld.net
>         <mailto:gharmon at idworld.net> **
>
>
>         This list hosted by: http://www.qsl.net
>         Please help support this email list:
>         http://www.qsl.net/donate.html
>         Message delivered to w2hx at w2hx.com <mailto:w2hx at w2hx.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
>         <mailto:Milsurplus at mailman.qth.net>
>
>         This list hosted by: http://www.qsl.net
>         Please help support this email list:
>         http://www.qsl.net/donate.html
>
>         ______________________________________________________________
>         Milsurplus mailing list
>         Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>         Help: http://mailman.qth.net/mmfaq.htm
>         Post: mailto:Milsurplus at mailman.qth.net
>
>         This list hosted by: http://www.qsl.net
>         Please help support this email list:
>         http://www.qsl.net/donate.html
>
>     ______________________________________________________________
>     Milsurplus mailing list
>     Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>     Help: http://mailman.qth.net/mmfaq.htm
>     Post: mailto:Milsurplus at mailman.qth.net
>     <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
>     <http://mailman.qth.net/mmfaqhtm>
>     Post: mailto:Milsurplus at mailman.qth.net
>
>     This list hosted by: http://www.qsl.net <http://www.qslnet>
>     Please help support this email list: http://www.qsl.net/donate.html
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


From kargo_cult at msn.com  Sun Feb 24 19:56:56 2019
From: kargo_cult at msn.com (Hubert Miller)
Date: Mon, 25 Feb 2019 00:56:56 +0000
Subject: [Milsurplus] Unid Antenna Load Coil light plane
Message-ID: <MWHPR14MB1485BD326287BA70EF87A691E47A0@MWHPR14MB1485.namprd14.prod.outlook.com>

Maybe for Motorola Airboy ?
-H.



Sent from my Verizon, Samsung Galaxy smartphone
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From RAFANTINI at salisbury.edu  Mon Feb 25 11:15:33 2019
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Mon, 25 Feb 2019 16:15:33 +0000
Subject: [Milsurplus] R-390 receivers in NC
Message-ID: <c7d6584b71844e9f9238ae13594ed6ca@EXCHMBX02.salisbury.edu>

This is from over on the AMfone list, though maybe anyone who don't have or wants an R-390A may be interested. I figure about $250.00 is what a working R-390A is worth today. Shipping would be the killer.

http://amfone.net/Amforum/index.php?topic=44666.0

Ray F/KA3EKH
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From mike.tara at att.net  Mon Feb 25 19:24:13 2019
From: mike.tara at att.net (Yahoo! Member Services)
Date: Tue, 26 Feb 2019 00:24:13 +0000 (UTC)
Subject: [Milsurplus] an/grr5 canvas cover number cw 211/u
References: <757471956.3296857.1551140653712.ref@mail.yahoo.com>
Message-ID: <757471956.3296857.1551140653712@mail.yahoo.com>

wanted I canvas cover p/n cw 211/u contact me at? 1-775-825 2605 ?? thanks
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From wa5cab at cs.com  Tue Feb 26 01:47:55 2019
From: wa5cab at cs.com (Robert Downs)
Date: Tue, 26 Feb 2019 00:47:55 -0600
Subject: [Milsurplus] an/grr5 canvas cover number cw 211/u
In-Reply-To: <757471956.3296857.1551140653712@mail.yahoo.com>
References: <757471956.3296857.1551140653712.ref@mail.yahoo.com>
	<757471956.3296857.1551140653712@mail.yahoo.com>
Message-ID: <01ab01d4cd9f$34507810$9cf16830$@com>

For those who don?t recognize what a CW-211/U is or is for, it is the canvas cover for the AN/GRR-5 radio receiver.

 

Robert Downs

 

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Yahoo! Member Services
Sent: Monday, February 25, 2019 18:24
To: milsurplus at mailman.qth.net
Subject: [Milsurplus] an/grr5 canvas cover number cw 211/u

 

wanted I canvas cover p/n cw 211/u contact me at  1-775-825 2605    thanks

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From arc5 at ix.netcom.com  Tue Feb 26 09:14:55 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Tue, 26 Feb 2019 08:14:55 -0600
Subject: [Milsurplus] FMing Prog. Oscillators (was GE Portamobil)
In-Reply-To: <7e2fb964-d552-fec1-a625-fa8f51647d95@comcast.net>
References: <397525627.13131.1551125153234@wamui-jasmine.atl.sa.earthlink.net>
	<ebf87603b2634c8ebc968933267d2241@EXCHMBX02.salisbury.edu>
	<7e2fb964-d552-fec1-a625-fa8f51647d95@comcast.net>
Message-ID: <000301d4cddd$a5f0b870$f1d22950$@netcom.com>

(Copied to other lists for general interest:)

I've been working on a concept.

Can't FM a programmable oscillator, but:
Say you have a rig that requires Fo/18 crystal.
So 146.52 would be 8140 KC.
And you have another crystal laying around, doesn't
matter the freq since we can order any freq prog. osc,
as long as the crystal's a fundamental.
Assume a common Color Burst crystal of 3.5795 Mc.

We order a 4560.5 KC oscillator.
With two transistors and a couple of diodes, 
we can sample mic audio through an adjustable
audio amplifier, then apply it to an oscillator
with the 3579.5 crystal, say in the Emitter lead.  
This crystal oscillator WILL FM at the audio rate.  
Output this and the prog. oscillator to a couple 
of diodes as a non-linear mixer. 
One of the products will 
be 8140 KC, FMing at the audio rate.
Don't need much of the mic audio since we'd
only need to swing the Color crystal about 300 
cycles, since it will be multiplied by 18.

GL OM ES 73 DE Dave AB5S




From gzook at yahoo.com  Tue Feb 26 10:30:36 2019
From: gzook at yahoo.com (Glen Zook)
Date: Tue, 26 Feb 2019 15:30:36 +0000 (UTC)
Subject: [Milsurplus] [Boatanchors] FMing Prog. Oscillators (was GE
	Portamobil)
In-Reply-To: <000301d4cddd$a5f0b870$f1d22950$@netcom.com>
References: <397525627.13131.1551125153234@wamui-jasmine.atl.sa.earthlink.net>
	<ebf87603b2634c8ebc968933267d2241@EXCHMBX02.salisbury.edu>
	<7e2fb964-d552-fec1-a625-fa8f51647d95@comcast.net>
	<000301d4cddd$a5f0b870$f1d22950$@netcom.com>
Message-ID: <1545616178.5844714.1551195036242@mail.yahoo.com>

You can always phase modulate the signal.? Remember, most of the old tube-type "FM" units sold by Motorola, General Electric, etc., were actually phase modulated (PM) instead of being frequency modulated (FM).? Using PM would probably be easier to accomplish than other systems trying to FM the signal.
?Glen, K9STH?
Website: http://k9sth.net

      From: David Stinson <arc5 at ix.netcom.com>
 To: mrca at mailman.qth.net; boatanchors at mailman.qth.net; milsurplus at mailman.qth.net 
 Sent: Tuesday, February 26, 2019 8:15 AM
 Subject: [Boatanchors] FMing Prog. Oscillators (was GE Portamobil)
   
(Copied to other lists for general interest:)

I've been working on a concept.

Can't FM a programmable oscillator, but:
Say you have a rig that requires Fo/18 crystal.
So 146.52 would be 8140 KC.
And you have another crystal laying around, doesn't
matter the freq since we can order any freq prog. osc,
as long as the crystal's a fundamental.
Assume a common Color Burst crystal of 3.5795 Mc.

We order a 4560.5 KC oscillator.
With two transistors and a couple of diodes, 
we can sample mic audio through an adjustable
audio amplifier, then apply it to an oscillator
with the 3579.5 crystal, say in the Emitter lead.? 
This crystal oscillator WILL FM at the audio rate.? 
Output this and the prog. oscillator to a couple 
of diodes as a non-linear mixer. 
One of the products will 
be 8140 KC, FMing at the audio rate.
Don't need much of the mic audio since we'd
only need to swing the Color crystal about 300 
cycles, since it will be multiplied by 18.

   
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From wv2zow at gmail.com  Tue Feb 26 10:45:13 2019
From: wv2zow at gmail.com (Michael Clarson)
Date: Tue, 26 Feb 2019 10:45:13 -0500
Subject: [Milsurplus] [Boatanchors] FMing Prog. Oscillators (was GE
	Portamobil)
In-Reply-To: <1545616178.5844714.1551195036242@mail.yahoo.com>
References: <397525627.13131.1551125153234@wamui-jasmine.atl.sa.earthlink.net>
	<ebf87603b2634c8ebc968933267d2241@EXCHMBX02.salisbury.edu>
	<7e2fb964-d552-fec1-a625-fa8f51647d95@comcast.net>
	<000301d4cddd$a5f0b870$f1d22950$@netcom.com>
	<1545616178.5844714.1551195036242@mail.yahoo.com>
Message-ID: <CAFx0t27yZuzyayBQ4n+z7pFVrLSTzZ2o_J7usyx=+mpZwwpCxw@mail.gmail.com>

Dave: Perhaps this will help. Phase modulation looks easier than 2
oscillators. http://www.scomcontrollers.com/downloads/lcphasemod.pdf

Not sure if you can get at any of the circuitry in the programmable
oscillator, but a varicap across the crystal should give you nice FM.  Good
luck. --Mike, WV2ZOW

On Tue, Feb 26, 2019 at 10:30 AM Glen Zook via Boatanchors <
boatanchors at mailman.qth.net> wrote:

> You can always phase modulate the signal.  Remember, most of the old
> tube-type "FM" units sold by Motorola, General Electric, etc., were
> actually phase modulated (PM) instead of being frequency modulated (FM).
> Using PM would probably be easier to accomplish than other systems trying
> to FM the signal.
>  Glen, K9STH
> Website: http://k9sth.net
>
>       From: David Stinson <arc5 at ix.netcom.com>
>  To: mrca at mailman.qth.net; boatanchors at mailman.qth.net;
> milsurplus at mailman.qth.net
>  Sent: Tuesday, February 26, 2019 8:15 AM
>  Subject: [Boatanchors] FMing Prog. Oscillators (was GE Portamobil)
>
> (Copied to other lists for general interest:)
>
> I've been working on a concept.
>
> Can't FM a programmable oscillator, but:
> Say you have a rig that requires Fo/18 crystal.
> So 146.52 would be 8140 KC.
> And you have another crystal laying around, doesn't
> matter the freq since we can order any freq prog. osc,
> as long as the crystal's a fundamental.
> Assume a common Color Burst crystal of 3.5795 Mc.
>
> We order a 4560.5 KC oscillator.
> With two transistors and a couple of diodes,
> we can sample mic audio through an adjustable
> audio amplifier, then apply it to an oscillator
> with the 3579.5 crystal, say in the Emitter lead.
> This crystal oscillator WILL FM at the audio rate.
> Output this and the prog. oscillator to a couple
> of diodes as a non-linear mixer.
> One of the products will
> be 8140 KC, FMing at the audio rate.
> Don't need much of the mic audio since we'd
> only need to swing the Color crystal about 300
> cycles, since it will be multiplied by 18.
>
>
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Gary Harmon, K5JWK
> ** For Assistance: gharmon at idworld.net **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to wv2zow at gmail.com
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From antqradio at sbcglobal.net  Tue Feb 26 14:41:31 2019
From: antqradio at sbcglobal.net (Jim Whartenby)
Date: Tue, 26 Feb 2019 19:41:31 +0000 (UTC)
Subject: [Milsurplus] [MMRCG] R-390 receivers in NC
In-Reply-To: <c7d6584b71844e9f9238ae13594ed6ca@EXCHMBX02.salisbury.edu>
References: <c7d6584b71844e9f9238ae13594ed6ca@EXCHMBX02.salisbury.edu>
Message-ID: <1709799002.5705241.1551210091191@mail.yahoo.com>

Kind of reminds me of the mess that Dan Arney, KN6DI had in the pole barn behind his house in Texas.? Perhaps this is the same bunch of radios???
YouTube video no longer works so I guess that all of the radios are spoken for?Jim

I wonder why people argue over the 10% of their differences and ignore the 90% they agree on? 

    On Monday, February 25, 2019, 10:15:40 AM CST, Ray Fantini <RAFANTINI at salisbury.edu> wrote:  
 
  
This is from over on the AMfone list, though maybe anyone who don?t have or wants an R-390A may be interested. I figure about $250.00 is what a working R-390A is worth today. Shipping would be the killer.
 
 ?
 
http://amfone.net/Amforum/index.php?topic=44666.0
 
 ?
 
Ray F/KA3EKH
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From arc5 at ix.netcom.com  Tue Feb 26 15:41:53 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Tue, 26 Feb 2019 14:41:53 -0600
Subject: [Milsurplus] [MMRCG] R-390 receivers in NC
In-Reply-To: <1709799002.5705241.1551210091191@mail.yahoo.com>
References: <c7d6584b71844e9f9238ae13594ed6ca@EXCHMBX02.salisbury.edu>
	<1709799002.5705241.1551210091191@mail.yahoo.com>
Message-ID: <001201d4ce13$b5776bf0$206643d0$@netcom.com>

 

 

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Jim Whartenby
Subject: Re: [Milsurplus] [MMRCG] R-390 receivers in NC

 

Kind of reminds me of the mess that Dan Arney, KN6DI had in the pole barn behind his house in Texas?
------------

 

Anyone know what happened to that massive pile?  I hope to God it didn?t just go in the dump.

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From Paul.Thekan at cpii.com  Tue Feb 26 15:43:32 2019
From: Paul.Thekan at cpii.com (Thekan, Paul)
Date: Tue, 26 Feb 2019 20:43:32 +0000
Subject: [Milsurplus] [MMRCG] R-390 receivers in NC
In-Reply-To: <001201d4ce13$b5776bf0$206643d0$@netcom.com>
References: <c7d6584b71844e9f9238ae13594ed6ca@EXCHMBX02.salisbury.edu>
	<1709799002.5705241.1551210091191@mail.yahoo.com>
	<001201d4ce13$b5776bf0$206643d0$@netcom.com>
Message-ID: <a9112bb6065d48d99ac18caaa3154e84@Gold.cpii.com>

Someone bought the entire lot?.maybe Fair Radio?

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of David Stinson
Sent: Tuesday, February 26, 2019 12:42 PM
To: 'Jim Whartenby'; 'Mrca Mailing List'; MMRCG at groups.io
Cc: 'Military Surplus Mail List'
Subject: Re: [Milsurplus] [MMRCG] R-390 receivers in NC



From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Jim Whartenby
Subject: Re: [Milsurplus] [MMRCG] R-390 receivers in NC

Kind of reminds me of the mess that Dan Arney, KN6DI had in the pole barn behind his house in Texas?
------------

Anyone know what happened to that massive pile?  I hope to God it didn?t just go in the dump.

_____________________________

This message, including any attachments, may include privileged,
confidential and/or inside information. Any distribution or use of this
communication by anyone other than the intended recipient(s) is strictly
prohibited and may be unlawful.  If you are not the intended recipient,
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From briankn4r at gmail.com  Tue Feb 26 20:59:32 2019
From: briankn4r at gmail.com (Brian Harrison)
Date: Tue, 26 Feb 2019 20:59:32 -0500
Subject: [Milsurplus] R-390/A parts available in Taylor, Missouri
In-Reply-To: <c7d6584b71844e9f9238ae13594ed6ca@EXCHMBX02.salisbury.edu>
References: <c7d6584b71844e9f9238ae13594ed6ca@EXCHMBX02.salisbury.edu>
Message-ID: <F38A54E4-0815-460A-99B6-7EED17EBD6AA@gmail.com>

All,

Steve N4LQ told me tonight that all his R-390/As and parts in Shelby NC are spoken for - so please don?t call or email any longer.

For anyone still wanting parts, please feel free to contact Ken Toliver K0GEI below!

Tnx and all the best,

brian
kn4r

----

         A friend sent your info to me.   I am Ken ( K0GEI ) and still have lots of R-390a parts to get rid of.
         I got rid of the meters long ago, But still have other things to get rid of.
         I am going to be 86 in April and needing to unload my stuff before I go away one day and my dear wife
         won?t know what to do with and then it may end up in the dump. My basement is so full I can 
         hardly get around in it.  Please let me know what you need.         The price is right!
 
         I have been rebuilding and repairing R-390A?s for many years. Now it?s time for me to stop!
 
        Kenneth Toliver ( K0GEI )
        Po Box-71
        Taylor, Missouri. 63471
        573-769-2896
        kmtoliver at marktwain.net <mailto:kmtoliver at marktwain.net>

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From arc5 at ix.netcom.com  Wed Feb 27 07:43:55 2019
From: arc5 at ix.netcom.com (David Stinson)
Date: Wed, 27 Feb 2019 06:43:55 -0600
Subject: [Milsurplus] Unid Antenna Load Coil light plane
In-Reply-To: <MWHPR14MB1485BD326287BA70EF87A691E47A0@MWHPR14MB1485.namprd14.prod.outlook.com>
References: <MWHPR14MB1485BD326287BA70EF87A691E47A0@MWHPR14MB1485.namprd14.prod.outlook.com>
Message-ID: <000301d4ce9a$1a4a0110$4ede0330$@netcom.com>

Have had one of those and it is for sure Motorola.

Can?t remember for exactly which model, but I think it was

the one with the sloped face and the brownish finish.

 

From: Hubert Miller
Subject: [Milsurplus] Unid Antenna Load Coil light plane

 

Maybe for Motorola Airboy ?

-H.

 

 

 

Sent from my Verizon, Samsung Galaxy smartphone

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From RAFANTINI at salisbury.edu  Wed Feb 27 08:28:35 2019
From: RAFANTINI at salisbury.edu (Ray Fantini)
Date: Wed, 27 Feb 2019 13:28:35 +0000
Subject: [Milsurplus] R-390 parts
Message-ID: <20d0e9bc5d154cfda5dd11efeae05af4@EXCHMBX02.salisbury.edu>

Additional information on R-390A parts lot.

Ray F/KA3EKH

Begin forwarded message:

From: Brian Harrison <briankn4r at gmail.com<mailto:briankn4r at gmail.com>>
Subject: R-390/A parts available in Taylor, Missouri
Date: February 26, 2019 at 8:59:32 PM EST
To: milsurplus listserv <milsurplus at mailman.qth.net<mailto:milsurplus at mailman.qth.net>>

All,

Steve N4LQ told me tonight that all his R-390/As and parts in Shelby NC are spoken for - so please don't call or email any longer.

For anyone still wanting parts, please feel free to contact Ken Toliver K0GEI below!

Tnx and all the best,

brian
kn4r

----

         A friend sent your info to me.   I am Ken ( K0GEI ) and still have lots of R-390a parts to get rid of.
         I got rid of the meters long ago, but still have other things to get rid of.
         I am going to be 86 in April and needing to unload my stuff before I go away one day and my dear wife
         Won't know what to do with and then it may end up in the dump. My basement is so full I can
         hardly get around in it.  Please let me know what you need.         The price is right!

         I have been rebuilding and repairing R-390A's for many years. Now it's time for me to stop!

        Kenneth Toliver ( K0GEI )
        Po Box-71
        Taylor, Missouri. 63471
        573-769-2896
        kmtoliver at marktwain.net<mailto:kmtoliver at marktwain.net>



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From w2hx at w2hx.com  Wed Feb 27 21:21:15 2019
From: w2hx at w2hx.com (W2HX)
Date: Thu, 28 Feb 2019 02:21:15 +0000
Subject: [Milsurplus] GP-7 transmitter
Message-ID: <1551320474244.32412@w2hx.com>

I recently ran across a photo of one of these transmitters and it piqued by interest. What are your opinions of this transmitter? How would you compare it to, say, a TCS transmitter or a ATD (disregarding the multi channel capability) or even the BC-375?


I?'ve read it used 800 Hz power? Do hams build their own LV and HV power supplies for this?


Stability? Ease of maintenance? ease of use? fun to use? etc? I am not sure I want to add one to the collection but it really has caught my eye.


73 Eugene W2HX



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From scr287 at att.net  Thu Feb 28 05:32:39 2019
From: scr287 at att.net (Jack Antonio)
Date: Thu, 28 Feb 2019 05:32:39 -0500
Subject: [Milsurplus] GP-7 transmitter
In-Reply-To: <1551320474244.32412@w2hx.com>
References: <1551320474244.32412@w2hx.com>
Message-ID: <e32f7446-66cb-469e-32df-e7d5a2a9fcfe@att.net>



On 2/27/2019 9:21 PM, W2HX wrote:
> I recently ran across a photo of one of these transmitters and it piqued 
> by interest. What are your opinions of this transmitter? How would you 
> compare it to, say, a TCS transmitter or a ATD (disregarding the multi 
> channel capability) or even the BC-375?

If you like operating a BC-375 or ATD, you will feel right at home with
a GP-7. Like the BC-375, the complete set of tuning units will take up
a lot of space. There is no provision on the transmitter for a local
microphone or key, and on/off control, those functions are provided by
the remote control boxes. There are two, the pilots and operators
boxes. The operators box provides the connections for sidetone to
an external receiver. The two boxes together with the transmitter
provide an interphone function. (Think pilot/gunner in an SBD).

At least one of the tubes (801) is an audiophile type tube, the
843 may also be an audiophile tube, as it is a directly
heated triode.

> I?'ve read it used 800 Hz power? Do hams build their own LV and HV power 
> supplies for this?

Providing power is the biggest stumbling block.

Building an external supply would require extensive modification.
High B+ is 2000V, plus multiple low voltage filament sources.

Providing 120V 800cycle takes effort. A rotary inverter takes
a substantial amount of DC power, and is acoustically noisy.

There are static AC power sources that run from 120V 60 cycle, these
are heavy, and can be a bit expensive, even on the used market.
Relatively inexpensive units do show up on eBay, but you have to keep
an eye out for them. In my case, I found a pair, in not quite the best
of shape, and making one good unit out of the two. They came from
Texas, so freight wasn't too bad.

I tried a PE-206 inverter, but it is an 80V unit, and required
a 400 cycle variac to get up to 120. It was OK for phone, but wasn't
capable of running full power CW, and was a bit chirpy due to
voltage regulation.

I was always a dollar short and a day late for a 120V 800 cycle
inverter, so can't comment on how well that works.

Also, there is a motor/generator set out there(not intended specifically
for the GP)that runs from 120V 60cycle, but it is very large and heavy
and probably not too common.

> Stability? Ease of maintenance? ease of use? fun to use??etc? I am not 
> sure I want to add one to the collection but it really has caught my eye.

Again, I rank the GP-7 on a par with the BC-375 as far as usage goes. My
unit has survived all my experiments with powering it, so I have to say
it is reliable. My GP-7 came to me pretty clean, the only issue I had
with the transmitter itself was a bad 803. My ATD, on the other hand,
was a very different story.

One last thing, when looking for GP parts and pieces, there were earlier
versions of the GP, that weren't exactly the same. They use different
tuning units, they look the same but don't interchange. I know the
GP-3 and 4 are different from the GP-6 and 7, but when the
change occurred, I'm not sure.

Anyone have a manual for a GP-3?

Jack Antonio
WA7DIA

From aaf-radio-1 at aafradio.org  Thu Feb 28 10:36:06 2019
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Thu, 28 Feb 2019 10:36:06 -0500
Subject: [Milsurplus] GP-7 transmitter
In-Reply-To: <e32f7446-66cb-469e-32df-e7d5a2a9fcfe@att.net>
References: <1551320474244.32412@w2hx.com>
	<e32f7446-66cb-469e-32df-e7d5a2a9fcfe@att.net>
Message-ID: <97936686-6c54-05c6-4bdf-2e0703a6e2b0@aafradio.org>

That's an excellent rundown, Jack.? I would only add that there is a 
pesky little 800~ centrifugal fan under that chassis to cool the 803 
that has to be considered when deciding to use something other than an 
800Hz 115vac supply.? As you know, despite the weight (and an 800-1 
inverter isn't exactly lightweight), I like the Behlman laboratory AC 
supplies for this and the GO transmitter.? They are quiet and reliable.? 
The older ones with analog meters can occasionally be found reasonably 
with a patient search, and Behlman is pretty good about emailing pdf 
manuals for the older equipment, or they were the last time I called them.

- Mike? KC4TOS

On 2/28/2019 5:32 AM, Jack Antonio wrote:

> On 2/27/2019 9:21 PM, W2HX wrote:
>> I recently ran across a photo of one of these transmitters and it 
>> piqued by interest. What are your opinions of this transmitter? How 
>> would you compare it to, say, a TCS transmitter or a ATD 
>> (disregarding the multi channel capability) or even the BC-375?
>
> If you like operating a BC-375 or ATD, you will feel right at home with
> a GP-7. Like the BC-375, the complete set of tuning units will take up
> a lot of space. There is no provision on the transmitter for a local
> microphone or key, and on/off control, those functions are provided by
> the remote control boxes. There are two, the pilots and operators
> boxes. The operators box provides the connections for sidetone to
> an external receiver. The two boxes together with the transmitter
> provide an interphone function. (Think pilot/gunner in an SBD).
>
> At least one of the tubes (801) is an audiophile type tube, the
> 843 may also be an audiophile tube, as it is a directly
> heated triode.
>
>> I?'ve read it used 800 Hz power? Do hams build their own LV and HV 
>> power supplies for this?
>
> Providing power is the biggest stumbling block.
>
> Building an external supply would require extensive modification.
> High B+ is 2000V, plus multiple low voltage filament sources.
>
> Providing 120V 800cycle takes effort. A rotary inverter takes
> a substantial amount of DC power, and is acoustically noisy.
>
> There are static AC power sources that run from 120V 60 cycle, these
> are heavy, and can be a bit expensive, even on the used market.
> Relatively inexpensive units do show up on eBay, but you have to keep
> an eye out for them. In my case, I found a pair, in not quite the best
> of shape, and making one good unit out of the two. They came from
> Texas, so freight wasn't too bad.
>
> I tried a PE-206 inverter, but it is an 80V unit, and required
> a 400 cycle variac to get up to 120. It was OK for phone, but wasn't
> capable of running full power CW, and was a bit chirpy due to
> voltage regulation.
>
> I was always a dollar short and a day late for a 120V 800 cycle
> inverter, so can't comment on how well that works.
>
> Also, there is a motor/generator set out there(not intended specifically
> for the GP)that runs from 120V 60cycle, but it is very large and heavy
> and probably not too common.
>
>> Stability? Ease of maintenance? ease of use? fun to use??etc? I am 
>> not sure I want to add one to the collection but it really has caught 
>> my eye.
>
> Again, I rank the GP-7 on a par with the BC-375 as far as usage goes. My
> unit has survived all my experiments with powering it, so I have to say
> it is reliable. My GP-7 came to me pretty clean, the only issue I had
> with the transmitter itself was a bad 803. My ATD, on the other hand,
> was a very different story.
>
> One last thing, when looking for GP parts and pieces, there were earlier
> versions of the GP, that weren't exactly the same. They use different
> tuning units, they look the same but don't interchange. I know the
> GP-3 and 4 are different from the GP-6 and 7, but when the
> change occurred, I'm not sure.
>
> Anyone have a manual for a GP-3?
>
> Jack Antonio
> WA7DIA
> ______________________________________________________________
> 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

-- 
Michael Hanz - KC4TOS


From w2hx at w2hx.com  Thu Feb 28 10:48:28 2019
From: w2hx at w2hx.com (W2HX)
Date: Thu, 28 Feb 2019 15:48:28 +0000
Subject: [Milsurplus] GP-7 transmitter
In-Reply-To: <97936686-6c54-05c6-4bdf-2e0703a6e2b0@aafradio.org>
References: <1551320474244.32412@w2hx.com>
	<e32f7446-66cb-469e-32df-e7d5a2a9fcfe@att.net>,
	<97936686-6c54-05c6-4bdf-2e0703a6e2b0@aafradio.org>
Message-ID: <1551368908023.88867@w2hx.com>

Silly question on my part. Other than a fan that might be expecting AC, the filaments and B+ are DC, right? So why not create an outboard power supply to generate 2000 VDC and whatever else it needs? Sure there will be some iron and rectifiers and big caps, but isnt that doable? Or is that just as much, or more, work than finding a source of 800 Hz? (maybe that is the best answer afterall).

I've also seen some Elgar AC supplies, some have variable oscillators. I don't know if these can go up to 800 Hz or max out at 400 Hz, I'd have to look into it further.

Anyone know how many watts need to be supplied by such a supply?

thanks all,
73 Eugene W2HX

________________________________________
From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> on behalf of Michael Hanz <aaf-radio-1 at aafradio.org>
Sent: Thursday, February 28, 2019 10:36 AM
To: Jack Antonio; milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] GP-7 transmitter

That's an excellent rundown, Jack.  I would only add that there is a
pesky little 800~ centrifugal fan under that chassis to cool the 803
that has to be considered when deciding to use something other than an
800Hz 115vac supply.  As you know, despite the weight (and an 800-1
inverter isn't exactly lightweight), I like the Behlman laboratory AC
supplies for this and the GO transmitter.  They are quiet and reliable.
The older ones with analog meters can occasionally be found reasonably
with a patient search, and Behlman is pretty good about emailing pdf
manuals for the older equipment, or they were the last time I called them.

- Mike  KC4TOS

On 2/28/2019 5:32 AM, Jack Antonio wrote:

> On 2/27/2019 9:21 PM, W2HX wrote:
>> I recently ran across a photo of one of these transmitters and it
>> piqued by interest. What are your opinions of this transmitter? How
>> would you compare it to, say, a TCS transmitter or a ATD
>> (disregarding the multi channel capability) or even the BC-375?
>
> If you like operating a BC-375 or ATD, you will feel right at home with
> a GP-7. Like the BC-375, the complete set of tuning units will take up
> a lot of space. There is no provision on the transmitter for a local
> microphone or key, and on/off control, those functions are provided by
> the remote control boxes. There are two, the pilots and operators
> boxes. The operators box provides the connections for sidetone to
> an external receiver. The two boxes together with the transmitter
> provide an interphone function. (Think pilot/gunner in an SBD).
>
> At least one of the tubes (801) is an audiophile type tube, the
> 843 may also be an audiophile tube, as it is a directly
> heated triode.
>
>> I?'ve read it used 800 Hz power? Do hams build their own LV and HV
>> power supplies for this?
>
> Providing power is the biggest stumbling block.
>
> Building an external supply would require extensive modification.
> High B+ is 2000V, plus multiple low voltage filament sources.
>
> Providing 120V 800cycle takes effort. A rotary inverter takes
> a substantial amount of DC power, and is acoustically noisy.
>
> There are static AC power sources that run from 120V 60 cycle, these
> are heavy, and can be a bit expensive, even on the used market.
> Relatively inexpensive units do show up on eBay, but you have to keep
> an eye out for them. In my case, I found a pair, in not quite the best
> of shape, and making one good unit out of the two. They came from
> Texas, so freight wasn't too bad.
>
> I tried a PE-206 inverter, but it is an 80V unit, and required
> a 400 cycle variac to get up to 120. It was OK for phone, but wasn't
> capable of running full power CW, and was a bit chirpy due to
> voltage regulation.
>
> I was always a dollar short and a day late for a 120V 800 cycle
> inverter, so can't comment on how well that works.
>
> Also, there is a motor/generator set out there(not intended specifically
> for the GP)that runs from 120V 60cycle, but it is very large and heavy
> and probably not too common.
>
>> Stability? Ease of maintenance? ease of use? fun to use? etc? I am
>> not sure I want to add one to the collection but it really has caught
>> my eye.
>
> Again, I rank the GP-7 on a par with the BC-375 as far as usage goes. My
> unit has survived all my experiments with powering it, so I have to say
> it is reliable. My GP-7 came to me pretty clean, the only issue I had
> with the transmitter itself was a bad 803. My ATD, on the other hand,
> was a very different story.
>
> One last thing, when looking for GP parts and pieces, there were earlier
> versions of the GP, that weren't exactly the same. They use different
> tuning units, they look the same but don't interchange. I know the
> GP-3 and 4 are different from the GP-6 and 7, but when the
> change occurred, I'm not sure.
>
> Anyone have a manual for a GP-3?
>
> Jack Antonio
> WA7DIA
> ______________________________________________________________
> 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

--
Michael Hanz - KC4TOS

______________________________________________________________
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 farmer.rob.flory at gmail.com  Thu Feb 28 10:58:49 2019
From: farmer.rob.flory at gmail.com (Rob Flory)
Date: Thu, 28 Feb 2019 10:58:49 -0500
Subject: [Milsurplus] GP-7 Transmitter Supply
Message-ID: <CAFcNxxVRVKzVgb_tUGndu2Gh9siYLA_MppXqbvcsR9Vh4XxbwA@mail.gmail.com>

Mike, Eugene et al,

Do you know if the GP-7 uses primary keying like the TBW?

That works OK with an 800cycle supply because of the small filters, but
makes life difficult if trying to power it with an outboard 60-cycle
supply.

RF
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From aaf-radio-1 at aafradio.org  Thu Feb 28 11:52:06 2019
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Thu, 28 Feb 2019 11:52:06 -0500
Subject: [Milsurplus] GP-7 Transmitter Supply
In-Reply-To: <CAFcNxxVRVKzVgb_tUGndu2Gh9siYLA_MppXqbvcsR9Vh4XxbwA@mail.gmail.com>
References: <CAFcNxxVRVKzVgb_tUGndu2Gh9siYLA_MppXqbvcsR9Vh4XxbwA@mail.gmail.com>
Message-ID: <97b92a17-a4bf-b38e-be43-86cde7c95d9e@aafradio.org>

It does, Rob - K-101E switches the HV transformer primary.? That's 
another reason for going to the trouble of figuring out how to provide 
an 800Hz supply.

 ?- Mike

On 2/28/2019 10:58 AM, Rob Flory wrote:
> Mike, Eugene et al,
>
> Do you know if the GP-7 uses primary keying like the TBW?
>
> That works OK with an 800cycle supply because of the small filters, 
> but makes life difficult if trying to power it with an outboard 
> 60-cycle supply.
>
> RF


From scr287 at att.net  Thu Feb 28 12:27:46 2019
From: scr287 at att.net (Jack Antonio)
Date: Thu, 28 Feb 2019 12:27:46 -0500
Subject: [Milsurplus] GP-7 transmitter
In-Reply-To: <1551368908023.88867@w2hx.com>
References: <1551320474244.32412@w2hx.com>
	<e32f7446-66cb-469e-32df-e7d5a2a9fcfe@att.net>
	<97936686-6c54-05c6-4bdf-2e0703a6e2b0@aafradio.org>
	<1551368908023.88867@w2hx.com>
Message-ID: <40a6dbed-2e5a-69cd-9c1d-6359a861659b@att.net>



On 2/28/2019 10:48 AM, W2HX wrote:
> Silly question on my part. Other than a fan that might be expecting AC, the filaments and B+ are DC, right?
Not so silly.  The filaments are all AC driven. There is a transformer
in the unit with 5 secondaries, just for tube filaments. The B+ supplies
are DC, there is a 5Z3 and a pair of 1616 rectifiers.

I forgot about the fan, probably shouldn't rely on my memory at 4AM. As 
Mike says, it is an AC fan.

> So why not create an outboard power supply to generate 2000 VDC and >whatever else it needs? 

I have heard of this being done, but since the GP transmitter power
supplies are internal, the voltages are not brought out to a connector,
so getting from outside to inside will be an issue. Also, it will need
to supply 5 different filament voltages.

Rob asked about keying, the keying relay itself is DC operated,
jumperable to either 14 or 28V. However the keying relay does key the
primary AC to the high voltage transformer.

>Anyone know how many watts need to be supplied by such a supply?

The tag on the transmitter says it requires 8A of 120V. Somewhere
I've seen a tabulation of the AC power required for the various
modes, voice, and 1/4, 1/2 and Full CW, but I can't find it
right now. I believe the 8A is for full power CW.


Jack Antonio
WA7DIA

From w2hx at w2hx.com  Thu Feb 28 14:31:51 2019
From: w2hx at w2hx.com (W2HX)
Date: Thu, 28 Feb 2019 19:31:51 +0000
Subject: [Milsurplus] GP-7 transmitter
In-Reply-To: <40a6dbed-2e5a-69cd-9c1d-6359a861659b@att.net>
References: <1551320474244.32412@w2hx.com>
	<e32f7446-66cb-469e-32df-e7d5a2a9fcfe@att.net>
	<97936686-6c54-05c6-4bdf-2e0703a6e2b0@aafradio.org>
	<1551368908023.88867@w2hx.com>,
	<40a6dbed-2e5a-69cd-9c1d-6359a861659b@att.net>
Message-ID: <1551382311556.17823@w2hx.com>

5 different filament voltages?! wow. Surprising they couldn't have found tubes that shared more of a common voltage. Would have saved some transformer hardware. Ok, so if I really want one of these, I'll have to find an 800 Hz supply. hmmm

thanks
Eugene

________________________________________
From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> on behalf of Jack Antonio <scr287 at att.net>
Sent: Thursday, February 28, 2019 12:27 PM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] GP-7 transmitter

On 2/28/2019 10:48 AM, W2HX wrote:
> Silly question on my part. Other than a fan that might be expecting AC, the filaments and B+ are DC, right?
Not so silly.  The filaments are all AC driven. There is a transformer
in the unit with 5 secondaries, just for tube filaments. The B+ supplies
are DC, there is a 5Z3 and a pair of 1616 rectifiers.

I forgot about the fan, probably shouldn't rely on my memory at 4AM. As
Mike says, it is an AC fan.

> So why not create an outboard power supply to generate 2000 VDC and >whatever else it needs?

I have heard of this being done, but since the GP transmitter power
supplies are internal, the voltages are not brought out to a connector,
so getting from outside to inside will be an issue. Also, it will need
to supply 5 different filament voltages.

Rob asked about keying, the keying relay itself is DC operated,
jumperable to either 14 or 28V. However the keying relay does key the
primary AC to the high voltage transformer.

>Anyone know how many watts need to be supplied by such a supply?

The tag on the transmitter says it requires 8A of 120V. Somewhere
I've seen a tabulation of the AC power required for the various
modes, voice, and 1/4, 1/2 and Full CW, but I can't find it
right now. I believe the 8A is for full power CW.


Jack Antonio
WA7DIA
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From kk5f at earthlink.net  Thu Feb 28 16:21:21 2019
From: kk5f at earthlink.net (Mike Morrow)
Date: Thu, 28 Feb 2019 15:21:21 -0600 (GMT-06:00)
Subject: [Milsurplus] GP-7 transmitter
Message-ID: <1871097211.11154.1551388881912@wamui-gaston.atl.sa.earthlink.net>

Eugene wrote:

> Ok, so if I really want one of these, I'll have to find an 800 Hz
> supply.

Plus, you will need the RU-18 or RU-19 two-receiver system that almost always accompanied a GP-7.  With one of the two receivers, you'll need a ZB-2 or ZB-3 VHF homing adapter.  Don't forget the ABK-* Mark III IFF transponder.  :-)

Mike / KK5F

