I'm going to step away from the direct instrument equipment a bit.
Is there anything else near the amp, cables or plugged into the same outlet? I know I get noise with my laptop power supply if it's too close to signal cables.....and the laptop itself raises havoc with everything. I use the laptop for both pedal programming and recording, so cable routing is quite tricky.
7/29/04 EBMM Sub1 X11376 oil/wax neck, gloss black body, faux binding, HSS w/5 way and silent circuit
keep in mind that you are talking about four pieces of wood two pots one switch a trem along with springs two pickups and some wire.....BP