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Model 90 Tuning after cleaning tuning capacitor
#26

If the mica insulators for the trimmers are shot, they may be easily replaced.

Get any "blister pack" of stuff from just about any store - you know, the kind of package that is thin clear plastic.

Cut the plastic into rectangular pieces the same size as the mica insulators.

Use an awl with a piece of wood underneath, and carefully punch a hole in the center of each piece of plastic.

Disassemble each trimmer, making sure everything is dry after they are disassembled. (Do this one trimmer at a time, don't disassemble all four at once.) Don't lose any parts!

Install a piece of plastic in place of a mica sheet and reassemble the trimmer. Repeat this for every trimmer.

It will work fine. Icon_smile

I've done this many times on those older Philco 90, 70 and 20 trimmers.

--
Ron Ramirez
Ferdinand IN


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RE: Model 90 Tuning after cleaning tuning capacitor - by Ron Ramirez - 01-28-2016, 08:47 PM



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