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Philco 84 Restore
markmokris
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Posts: 109
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Joined: Mar 2015
City: Ann Arbor, Michigan
#1

07-31-2015, 10:09 AM
I am just finishing up a restore of a Philco 84 cathedral.  I had to rewind the primaries on the antenna and oscillator coils.  I replaced all the capacitors. I also replaced all the dogbone resistors. I have adjusted the regeneration control, and peaked the IF capacitors.  It is playing with pretty good volume with only an 8 ft. piece of antenna wire.

I need to still make the 2 meg ohm resistor change from the service tip in the IF transformer to see if it plays even better.

Question...I noticed that someone had removed the "gimmick" capacitor (#3) so I replaced it.  It seemed to make no difference.  What exactly is the capacitor doing?  Coupling a little extra signal from the antenna to the oscillator?

Why would it seem to not be needed?

   

Thanks,

Mark K8KZ
(This post was last modified: 07-31-2015, 10:09 AM by markmokris.)
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Philco 84 Restore - by markmokris - 07-31-2015, 10:09 AM
RE: Philco 84 Restore - by GarySP - 08-01-2015, 07:46 PM



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