02-12-2006, 11:53 AM
Changing that 330K resistor is good obviously.
One note: The electrolytic cap part 59 n the schematic is DRAWN WRONG.
The POSITIVE end should be grounded and the NEGATIVE side to the HV centertap line.
This is the negative bias filter cap. Be sure you installed your new one correctly. If you followed the schematic, it's in backwards. This will definately upset the grid bias on the 1st. audio and the audio output tubes.
Bwsure that metal-clad power resistor, part 58, is good or replaced. They can open or short to the chassis. This style of resistor is called a "Candohm." It's mounted in the corner of the chassis next to power transformer and the line filter bakelite block.
One note: The electrolytic cap part 59 n the schematic is DRAWN WRONG.
The POSITIVE end should be grounded and the NEGATIVE side to the HV centertap line.
This is the negative bias filter cap. Be sure you installed your new one correctly. If you followed the schematic, it's in backwards. This will definately upset the grid bias on the 1st. audio and the audio output tubes.
Bwsure that metal-clad power resistor, part 58, is good or replaced. They can open or short to the chassis. This style of resistor is called a "Candohm." It's mounted in the corner of the chassis next to power transformer and the line filter bakelite block.
Chuck Schwark,
The Philco Repair Bench
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http://www.philcorepairbench.com
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