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Old 18th Apr 2019, 4:19 pm   #111
Mike. Watterson
Heptode
 
Join Date: Dec 2014
Location: Limerick, Ireland.
Posts: 901
Default Re: Ferguson 382U Firefly not playing ball

As a last resort I use alcohol on VERY fine wet&dry folded to be exactly the right width.

Once I used a sharp blade to cut off a "lip" caused by something had bashed the edge of the capacitor plate.

Never take a tuning cap apart.

Also never get oil or WD40 etc between the vanes as it dramatically changes the capacitance, so careful oiling bearings. WD40 and switch cleaners remove lubrication. I'd not use "switch cleaner" on a tuner either, some don't evaporate completely, neither does WD40. You can use alcohol (at a pinch, Boots Surgical spirit) to rinse off Oil, WD40 or grease that has got into the vanes. A light bulb and battery or DVM in beeper mode. you do often need to disconnect the stationary connection as it might be "earthed" via a coil or aerial loop. Usually the rotary part is earthed.
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