[Milsurplus] Milsurplus Mystery Raytheon AN/PRC-xxx

[Brooke]

Hi Nick:

It's interesting that they used a Frequency Electronics Inc (FEI) ovenized 1 MHz crystal oscillator.  These have 
excellent specs.

-- 
Have Fun,

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

-------- Original Message --------
> Date: 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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