I just bought a Jap '69 reissue Mustang, my first guitar with single coils. I like the tone, but the 60 cycle hum is very annoying! I looked under the control plate, and there is what appears to be black shielding paint. However, there is no ground wire connected to this shielding. Furthermore, there is no ground wire soldered from the body of the pots to the output jack. Is this normal for a Mustang?
I really want to do all that I can to kill the hum, but I'm not exactly sure what I should do. Would copper shielding tape in the cavities and proper grounding get rid of all, or most of the hum? Would different pots or some kind of shielded wiring make an improvement? I know it's not the amp, because when both pickups are on together, the hum disappears. But I'd really like to have the option of using the pickups individually without the hiss.
Both of my other guitars are Gibsons sporting powerful humbuckers, so I'd rather keep single coil pickups in this one. I really want an authentic single coil sound (well, authentic minus the hum!), so I'm reluctant to put in singles with dummy coils like the Lace or Fender Noiseless, because I've heard that the tone is not exactly the same with these (although I haven't actually heard these types of pickups in person, so I could be mistaken on this.)
Any advice?