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Model 90 Cathedral stopped receiving
morzh
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Posts: 15,811
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City: Jackson, NJ
#33

09-08-2020, 03:28 PM
These are trimmer capacitors. The mica is the insulator between the two plates. The capacitance is changed through tightening/loosening of the nut that gets the plates closer/further from each other thus changing the capacitance.
The capacitance is small and is used to trim the band limits to be exactly where they are wanted after they are roughly adjusted.
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RE: Model 90 Cathedral stopped receiving - by morzh - 09-08-2020, 03:28 PM



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