[Milsurplus] Milsurplus Digest, Vol 255, AN/PRC. Xx

Mike Christie mzfb at aol.com
Tue Jul 22 16:41:26 EDT 2025 

 That is AN/PRC 47 i have just put three back to operational status. I use these when I was over in Vietnam.  These are a bear to work on and they need to be converted for Amateur use they are upper sideband.MikeW1ZFB
    On Tuesday, July 22, 2025 at 04:17:01 PM EDT, <milsurplus-request at mailman.qth.net> wrote:   

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Today's Topics:

  1. ERMAG (Ron.K3PID)
  2. Mystery Raytheon AN/PRC-xxx (Nick England)
  3. Re: Mystery Raytheon AN/PRC-xxx (Brenda Gentry)


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Message: 1
Date: Tue, 22 Jul 2025 14:27:07 -0500
From: "Ron.K3PID" <ron.k3pid at sbcglobal.net>
To: boatanchors at mailman.qth.net, amradio at mailman.qth.net,
    milsurplus at mailman.qth.net
Subject: [Milsurplus] ERMAG
Message-ID: <1UkPJoOG10.2AVzBXjxhzd at zeus>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

Just received the July-August issue of Electric Radio Magazine! Another FB 
issue by Ray Osterwald, N?DMS!  If you aren't a subscriber you REALLY should give it a try! 
 
 
Ron K3PID
 
 
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Message: 2
Date: Tue, 22 Jul 2025 16:09:19 -0400
From: Nick England <navy.radio at gmail.com>
To: "milsurplus at mailman.qth.net" <milsurplus at mailman.qth.net>
Subject: [Milsurplus] Mystery Raytheon AN/PRC-xxx
Message-ID:
    <CAB55hNe=eED=zooVt73Sr2qB_nLp=3J9QHvndeX39aRqj-8PwQ at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

 Whazzit?
2-11 mc AM/SSB/CW transceiver, 1965 vintage?, 12v battery
Transistor, Synthesized, 1 kc increments (1 mc master oscillator)
455kc Collins filters. Lots of double-balanced mixers.
Raytheon logo on one circuit board but not elsewhere.
https://photos.app.goo.gl/6GmGTnuy9mByHDBi7

Some of the photos are just from trying to use the camera as a magnifying
glass.
It looks like the front panel ought to fold down, but connections to the
LOAD control prevent that - I'm still trying to figure out how to get
deeper and trace some connections.

I couldn't remove the cover atop the slug-tuned coils - I lifted and peeked
and it looks like the 1mc bandswitch. I can't figure out that nearby module
coupled to it by the chain and with leads from the LOAD switch.
Handset connector is MC10-14-6PN - a second connector was pulled and
extender wires added.
A cable/BNC connector has been added which runs back to the 455kc IF module.
The antenna connection has been bodged up a bit. The battery connector was
replaced by a 3-wire terminal strip.

The 2N1899 output transistor is rated 125w dissipation.

It looks like there may be an internal switching p/s module (left rear of
chassis)?

Please email info or leads
Thanks
Nick England K4NYW
www.navy-radio.com
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Message: 3
Date: Tue, 22 Jul 2025 16:16:28 -0400
From: Brenda Gentry <ka2ivy at verizon.net>
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Mystery Raytheon AN/PRC-xxx
Message-ID: <fe2f9797-6467-ca3c-f689-425686bb991e at verizon.net>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

Could it have been a competitor to the PRC-74?

 ?? B. Gentry, KA2IVY

On 7/22/25 4:09 PM, Nick England wrote:
> Whazzit?
> 2-11 mc AM/SSB/CW transceiver, 1965 vintage?, 12v battery
> Transistor, Synthesized, 1 kc increments (1 mc master oscillator)
> 455kc Collins filters. Lots of double-balanced mixers.
> Raytheon logo on one circuit board but not elsewhere.
> https://photos.app.goo.gl/6GmGTnuy9mByHDBi7
>
> Some of the photos are just from trying to use the camera as a 
> magnifying glass.
> It looks like the front panel ought to fold down, but connections to 
> the LOAD control prevent that - I'm still trying to figure out how to 
> get deeper and trace some connections.
>
> I couldn't remove the cover atop the slug-tuned coils - I lifted and 
> peeked and it looks like the 1mc bandswitch. I can't figure out that 
> nearby module coupled to it by the chain and with leads from the LOAD 
> switch.
> Handset connector is MC10-14-6PN - a second connector was pulled and 
> extender wires added.
> A cable/BNC connector has been added which runs back to the 455kc IF 
> module.
> The antenna connection has been bodged up a bit. The battery connector 
> was replaced by a 3-wire terminal strip.
>
> The 2N1899 output transistor is rated 125w dissipation.
>
> It looks like there may be an internal switching p/s module (left rear 
> of chassis)?
>
> Please email info or leads
> Thanks
> Nick England K4NYW
> www.navy-radio.com <http://www.navy-radio.com>
>
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End of Milsurplus Digest, Vol 255, Issue 41
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