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Need Help Reading a Schematic
codefox1
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Posts: 2,128
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#6

08-18-2013, 10:57 AM
Yes, the chassis should actually be at a positive voltage with respect to the center tap of the high voltage winding, and there is a resistor and an electrolytic capacitor with it's + side connected to the chassis to make it so. The principal purpose is to produce a negative bias voltage source for the output amplifier circuit. If this part is missing, bad or mis-wired, you're going to have hum for sure.
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Messages In This Thread
Need Help Reading a Schematic - by Jamie - 08-17-2013, 07:25 AM
RE: Need Help Reading a Schematic - by Jamie - 08-17-2013, 11:00 PM
RE: Need Help Reading a Schematic - by morzh - 08-17-2013, 11:14 PM
RE: Need Help Reading a Schematic - by Jamie - 08-17-2013, 11:24 PM
RE: Need Help Reading a Schematic - by codefox1 - 08-18-2013, 10:57 AM
RE: Need Help Reading a Schematic - by morzh - 08-18-2013, 11:05 AM
RE: Need Help Reading a Schematic - by Jamie - 08-18-2013, 12:13 PM
RE: Need Help Reading a Schematic - by Jamie - 08-18-2013, 06:53 PM
RE: Need Help Reading a Schematic - by morzh - 08-18-2013, 08:21 PM
RE: Need Help Reading a Schematic - by Arran - 08-18-2013, 10:16 PM
RE: Need Help Reading a Schematic - by Jamie - 08-19-2013, 08:18 AM



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  1. The PHILCO Phorum
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