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Old 04-08-2015, 12:58 AM
Electronic M's Avatar
Electronic M Electronic M is offline
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Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 15,463
Here is a 'cover all your bases' suggestion: if you have a 9-pin 'socket-saver/extender' plug it in to the chroma osc. tube socket and see if you have continuity between it and the solder terminals of the socket. Every so often the metal in a socket contact will break in a spot that is hard or impossible to see.

Also if there is a shield on that tube try removing the shield, and seeing if there is an effect on trying to adjust the osc. I've got a CTC-15 that don't won't chroma synch and don't want to oscillate if the osc. shield is on and grounded...So I just removed the shield as a quick fix.
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