[Milsurplus] Progrock 2

[Ray Fantini]

Progrock two looks like it may be the answer to the PRC-74 question. Using three or four progrocks can build up a bank of outputs to replace all the crystals in each crystal pack. Being each stick has three outputs you can stack them and replace all the rocks that are so prone of dying or drifting off frequency in that radio. Only issue is if there unterminated outputs would cause interference but being all that mixing garbage takes place outside the Ham bands don't think it would be a problem. The goal would be a PRC-74 that no longer needs the stupid calibration function and that works on all the channels. 

Ray F/KA3EKH





-----Original Message-----
From: mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> On Behalf Of Anthony Clare
Sent: Monday, September 30, 2024 11:01 AM
To: wa6bbq at sdf.org; Rob Flory <farmer.rob.flory at gmail.com>
Cc: mrca <mrca at mailman.qth.net>; milsurplus <milsurplus at mailman.qth.net>
Subject: Re: [MRCA] QRP Military Radio Magic




Jason,

The ProgRock is not my creation. The ProgRock is a device made by QRP Labs as a programmable crystal replacement. You should check out the QRP Labs site.
They have a number of interesting products.

I did a conversion on two TRC-77As, one of which Rob is currently using. I have also successfully used the ProgRock in a PRC-71 HF transceiver and in a
SEM-52 portable.

I created a document that details how I performed the conversion to the TRC-77. I plan to push that out to the group very soon.

n3kcb