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Philco 42-327 Code 122 High B+ Voltages
NV3G
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Posts: 74
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Joined: May 2008
City: Shinnston, West Virginia State, Province, Country: USA
#1

01-27-2010, 11:48 AM
I am helping a friend with his Philco 42-327 code 122. He has changed the filter capacitors and all of the paper capacitors. I am using the negative side of the electrolytic capacitors for the voltage measurements. At the cathode, pin 7 of the 35Z3 rectifier I measure 120 volts and 126.4 volts with 2 different meters. The voltage should be 108 volts DC. I am receiving no stations. The local oscillator grid, pin 4 of the 14AF7 measures -4.3 volts. When I inject the 455 KHz IF frequency into the set, I get an oscillation riding on the signal instead of a clear 455 kHz IF frequency sound. All suggestions are appreciated. Thank you.

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Philco 42-327 Code 122 High B+ Voltages - by NV3G - 01-27-2010, 11:48 AM



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