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Philco 91 code 225
Radioroslyn
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#2

01-09-2020, 09:20 PM
It would appear that it's used to decouple the audio signal out of the bias voltage going to the control grids of the 42's. That this point there is little voltage there like -20v. You could use a small electrolytic cap a few mfds @35 or 50v but be sure to connect the + side to the chassis and the - to the BC resistor.

OBTW Welcome!
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
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Messages In This Thread
Philco 91 code 225 - by Tom45acp - 01-09-2020, 07:49 PM
RE: Philco 91 code 225 - by Radioroslyn - 01-09-2020, 09:20 PM
RE: Philco 91 code 225 - by Tom45acp - 01-10-2020, 08:06 AM



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