[MRCA] GRC-106 test fixture

W2HX w2hx at w2hx.com
Thu Jun 18 13:15:39 EDT 2020


Very nice, Ray! BTW a GRC-106 cable and assembly test set was on ebay around November of last year. This was the link to it, but ebay has since purged the details. You may be able to find some details/picture maybe on worthpoint or picclick or whatever. But it looked like a full set of jigs etc.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F133254078740 (this link no longer works, but putting it in for reference)

Eugene


From: MMRCG at groups.io <MMRCG at groups.io> On Behalf Of Ray Fantini
Sent: Thursday, June 18, 2020 11:31 AM
To: mrca at mailman.qth.net; MMRCG <MMRCG at groups.io>
Subject: [MMRCG] GRC-106 test fixture


Thought would send a picture of the latest project, been taking a real beating on the 1A3 reference oscillators in the GRC-106. After spending way too much time trying to work on them with a maze of clip leads and stuff connected to them decided to build a reference oscillator test jig. By gutting the connector from a dead 662 chassis and using a old Bud Box that was part of some strange test harness built a box that the reference oscillator plugs into that allows full access to the entire assembly for troubleshooting and alignment. Now all I have to do is try to figure out why the dam things have a hard time starting, sounds crazy but now that I have full access going to go back to the book and try a full alignment and see if that makes any difference.

The manual refers to some form of test assembly RF Simulator SM-442/GRC that allows you to operate the reference oscillator and the rest of the synthesizer assembles external of the radio but imagine the chance of finding that's right up there with finding Hens teeth. Has anyone ever seen one of these test assemblies?




Ray F/KA3EKH

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