10-30-2012, 10:03 AM
Sounds like you over-sprayed and contaminated the trimmers or left behind too much coating on the plates on the tuning gang with residue - some cleaners leave behind a de-oxidizing oily compound, mainly usefull in switch contacts, but bad for a tuning cap or trimmer.
A non-residue cleaner is what you need that totally evaporates - many "tuner cleaners" leave behind lube compounds.
This residue changes the capacitance of the trimmers (or tuning sections) on the gang, throwing the alignment way off.
You'll have to carefully open the trimmers and clean the micas sheets and plates and re-align the set, it sounds like.
Chuck
A non-residue cleaner is what you need that totally evaporates - many "tuner cleaners" leave behind lube compounds.
This residue changes the capacitance of the trimmers (or tuning sections) on the gang, throwing the alignment way off.
You'll have to carefully open the trimmers and clean the micas sheets and plates and re-align the set, it sounds like.
Chuck
Chuck Schwark,
The Philco Repair Bench
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