Re: FM tuning drift - any ideas?
Just a shot in the dark here but does tapping the tuner cause a drift? if so are there any spring metal earths on the shaft inside the tuner? I say this because they used to be a nightmare in early TV UHF tuners we used to unsolder them clean them and refit, they remained a problem until varicaps came in then we had problems with the 30 volt stabilizers drifting.
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