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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
Subject: [Milsurplus] ERMAG
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
Subject: [Milsurplus] Mystery Raytheon AN/PRC-xxx
Message-ID:
<CAB55hNe=eED=zooVt73Sr2qB_nLp=3J9QHvndeX39aRqj-8PwQ@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.
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
Subject: Re: [Milsurplus] Mystery Raytheon AN/PRC-xxx
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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.
>
> 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
>
> ______________________________________________________________
> Milsurplus mailing list
>
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