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IF oscillation in Philco 38-12
cwc
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City: Pine Island, MN
#11

12-29-2015, 11:49 AM
(12-28-2015, 11:16 PM)Radioroslyn Wrote:  Hi Charlie,
I'd keep an eye on the voltage on the second grid of he 6A8 (osc plate) to make sure it's not changing much. A volt or is fine 20 or 30 not so good.
Also if you have a 110mmf mica (6) I'd swap it with the one that is in there.
I see there are a few ground connections if they are done with rivets they are suspect.

Merry Christmas!
Terry

Thanks.  I'll look at those things.  

Unless I'm missing something (always a possibility) maybe I can just monitor the B+ supply and look for a change there since there is just 3.5 ohms between the supply and the 2nd grid??
Charlie
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Messages In This Thread
IF oscillation in Philco 38-12 - by cwc - 11-12-2015, 10:55 AM
RE: IF oscillation in Philco 38-12 - by cwc - 11-13-2015, 10:27 AM
RE: IF oscillation in Philco 38-12 - by David - 11-12-2015, 09:15 PM
RE: IF oscillation in Philco 38-12 - by cwc - 11-13-2015, 10:29 AM
RE: IF oscillation in Philco 38-12 - by cwc - 11-19-2015, 12:06 AM
RE: New problem in Philco 38-12 - by cwc - 12-28-2015, 11:01 PM
RE: IF oscillation in Philco 38-12 - by cwc - 12-29-2015, 11:49 AM



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