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Phun with a 57
Mondial
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Posts: 1,114
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#2

04-18-2013, 01:18 PM
Yes, I would try changing the 77 mixer/osc tube first. The autodyne converter is sometimes finicky as to tubes. The other thing you might check is the 77's cathode resistor (#8 on schematic) which should be 8K. If this resistor has drifted up in value, it can cause intermittent oscillation, especially at the higher freqs.
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Messages In This Thread
Phun with a 57 - by BrendaAnnD - 04-18-2013, 08:49 AM
RE: Phun with a 57 - by Mondial - 04-18-2013, 01:18 PM
RE: Phun with a 57 - by Ron Ramirez - 04-18-2013, 03:56 PM
RE: Phun with a 57 - by 7estatdef - 04-18-2013, 05:31 PM
RE: Phun with a 57 - by BrendaAnnD - 04-19-2013, 11:27 AM



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