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Model 57 Doesn't Match Schematic
Chuck Schwark
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#2

11-07-2012, 02:27 PM
That dual section electrolytic has the (-) sides common.
Also, I don't know if the common is also the can.

If it is, then there should be a cardboard sleeve on the lower end of the can insulating it from the chassis. You can see from the schematic that the (-) sides are NOT going to ground, but thru resistor 32.

Check the (-) lug/wire for continuity to the can to determine if someone left the sleeve off, which would cause no audio output tube grid bias, messing up audio.

http://philcoradio.com/tech/images/57.jpg
(Annotated schematic from Ron's site here.)

Chuck
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Messages In This Thread
Model 57 Doesn't Match Schematic - by Pepperoni - 11-07-2012, 12:50 PM
RE: Model 57 Doesn't Match Schematic - by Chuck Schwark - 11-07-2012, 02:27 PM



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