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Modified 54C - Oscillator Issue
MrFixr55
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Posts: 935
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City: Greenlawn State, Province, Country: NY
#6

11-21-2021, 04:12 PM
Hi Ron, 

If I am reading the schematic right (And that may be an issue, as I am fighting either a bug or the effects of the COVID  Vax Booster), it appears that you eliminated the cathode bias resistor. (Maybe resistance really is futile?? Icon_wink )  Try  putting it back in.  Both units use a voltage divider in the B- Return to create an ersatz "C-" supply, but there is more resistance in the 38-18 than the 54. 

Hope this helps.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
Best Regards, 

MrFixr55
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Messages In This Thread
Modified 54C - Oscillator Issue - by Ron Ramirez - 11-20-2021, 10:59 PM
RE: Modified 54C - Oscillator Issue - by OZ4 - 11-21-2021, 12:12 PM
RE: Modified 54C - Oscillator Issue - by OZ4 - 11-21-2021, 12:26 PM
RE: Modified 54C - Oscillator Issue - by MrFixr55 - 11-21-2021, 04:12 PM
RE: Modified 54C - Oscillator Issue - by morzh - 11-21-2021, 05:10 PM



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  1. The PHILCO Phorum
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