[MRCA] [Milsurplus] [MMRCG] Mystery Raytheon AN/PRC-xxx

Tue Jul 22 18:54:12 EDT 2025

Speaking of PRC-70, I have three of them and some NOS boards. I also have
two power amps for them. I do not know if the amps ever went into
production, but Jane's does show it. 73 - Mike 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

908-902-3831

From: milsurplus-bounces at mailman.qth.net
<milsurplus-bounces at mailman.qth.net> On Behalf Of Ray Fantini via Milsurplus
Sent: Tuesday, July 22, 2025 4:27 PM
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Subject: Re: [Milsurplus] [MMRCG] Mystery Raytheon AN/PRC-xxx

looks like a Raytheon attempt to produce a AN/PRC-104, The AN/PRC-70 about
the same but that goes way back and the 74 before that. Harris, Collins and
Sunair produced a bunch of stuff around the same time but don't think any of
that ever caught on like the PRC-104 did.

Speaking of the PRC-70, is it just me or has anyone else noticed how much
they dropped in value? Everyone now want the "Cool" new Harris sets that
don't work?

Ray F/KA3EKH

  _____  

From: MMRCG at groups.io <mailto:MMRCG at groups.io>  <MMRCG at groups.io
<mailto:MMRCG at groups.io> > on behalf of Nick K4NYW via groups.io
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Sent: Tuesday, July 22, 2025 3:29 PM
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<mailto:MMRCG at groups.io> >; mrca at mailman.qth.net
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Subject: [MMRCG] Mystery Raytheon AN/PRC-xxx 

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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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