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

[Ray Fantini]

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 <MMRCG at groups.io> on behalf of Nick K4NYW via groups.io <navy.radio=gmail.com at groups.io>
Sent: Tuesday, July 22, 2025 3:29 PM
To: MMRCG at groups.io <MMRCG at groups.io>; mrca at mailman.qth.net <mrca at mailman.qth.net>; MRCG-West at groups.io <MRCG-West at groups.io>
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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