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Philco 80 oscillator
Radioroslyn
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Posts: 7,300
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#10

10-18-2011, 05:26 PM
Oh this is a very easy problem to solve. Just replace the 1 percent! A couple of things come to mind. In the center of the tuning condenser there's a brass strip that is the ground connection the the rotor. Use a little bit of Deoxit on it to insure a good connection at the rotor. Make sure the ground connections to the chassis are good. The rivet by the IF transformer and the 36 tube may be an issue. Run a separate ground wire.Same for pin 4 of the detector tube. Clean the screw that is the ground for the IF transformer that goes though the Bakelite cap. Take a working set and take a listen for the local oscillator on it 470kc above the dial setting of the model 80. Does it jump around as you tune it?
Terry
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
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Messages In This Thread
Philco 80 oscillator - by johnfin - 10-12-2011, 01:02 PM
Re: Philco 80 oscillator - by johnfin - 10-12-2011, 04:27 PM
Re: Philco 80 oscillator - by 7estatdef - 10-12-2011, 05:51 PM
Re: Philco 80 oscillator - by johnfin - 10-12-2011, 07:53 PM
Re: Philco 80 oscillator - by 7estatdef - 10-12-2011, 08:44 PM
Re: Philco 80 oscillator - by johnfin - 10-13-2011, 08:22 AM
Re: Philco 80 oscillator - by johnfin - 10-13-2011, 08:23 AM
Re: Philco 80 oscillator - by 7estatdef - 10-13-2011, 05:51 PM
Philco the squirrel - by johnfin - 10-17-2011, 10:02 PM
Re: Philco 80 oscillator - by 7estatdef - 10-18-2011, 05:26 PM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration