| : : :Hi Bill, : :Well, That fixed it! I decided to go ahead and rebuild the can so I stopped on my way home at the local electronics surplus place & got all 4 caps for a grand total of 87 cents. Pulled the can & disassembled it, removed the mica disc & used a dremel to trim the pads so they didn't touch any more, put it all back together & soldered on the new caps. Cover on, back in the radio & now it works, no more static & tunes in lots of stations! Now it's time for a recap & alignment. There seems to be some distortion in the audio on FM that's not there in AM but hopefully an alignment will help that. : :Thanks so much, I couldn't have fixed it without your help, Mark ::::: ::Hi Mark, :: This is classic Silver Mica Disease. You may be able to avoid rebuiding the discriminator, though. :: The leakage seems to be between pins 3 and 5 of L15. The capacitor going between pins 4 and 5 is a 15 pF capacitor, eventhopugh it is not shown on the schematic. :: Try this. Disconnect all leads to pin 4 of the discriminator and rebuild the circuit with a new 15 pF capacitor under the tube. Your voltages may come into line and FM may come back. :: Even if you wind up having to rebuild the discriminator, you will need to do the 15 pF replacement out of the can. :: By the way. The capacitor on the primary of the discriminator is 24 pF the two on the secondary are 68 pF. :: ::Best Regards, :: ::Bill Grimm Hi Mark, Best Regards, Bill |
| Zenith T825: No FM, just static | |
 Mark Johansson | |
  {:o)<= | |
| Edd | |
| Thomas Dermody | |
| Bill G. | |
| mark Johansson | |
| Bill G. | |
| Mark Johansson | |
| Bill G. | |
| Mark Johansson | |
 Bill G. | |
| Thomas Dermody | |
| Al R. | |
| Bill G. | |
| Al |
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