The tone pot on my Charvel has a really obnoxious issue with the tone pot. When you touch it or turn it something comes ungrounded or otherwise creates this awful buzzing sound. Solder joints are good, so did I cook the pot or capacitor? This is driving me mad as I can't use the tone control reliably without having to stop and tap it a few times to get the buzzing to stop.
Sounds like a bad pot. I would just replace the pot and capacitor, takes care of the problem every time.
I Japanese Fenders
MIJ '86 Strat, MIJ '95 Foto Flame Tele, Jackson JSX-94
Schecter C-1 Classic 3TSB, Takamine EG544SC-4C
Warwick Corvette Fretless MIJ '89 P-Bass Lyte
Fender Geddy Lee Sig Bass, Ibanez DTT700 Destroyer