P Bass HUM @ high tone setting
Happy Thanksgiving weekend to everybody. I've learned a LOT on these forums and I'm seeking to learn a little bit more.
2004 MIM P Bass w/ SD SPB-3. Just changed the stock bridge out for a Babicz. I have a Babicz on my Jazz and like it a lot (incredible sustain, great tone and adjustments are easy and precise).
I never noticed it before, but with tone knob fully in 'treble' position, I get a hum. Did I fail to make sure the new bridge was grounded? Well, I put alligator clip jumpers from string to string, then took the last jumper to ground (jack nut). No change. I measured resistance from each string to jack nut - got 0.1 to 0.2 ohms. I'm grounded!
I've had the bass about a week. Haven't opened up the wiring cavity.
The hum disappears when I grab a metal knob (tone or volume), also when I mute all strings with my left hand. Interesting note - muting one string with my left hand removes far more hum than muting one string with my right hand near the bridge. This probably doesn't mean anything.
I didn't notice this until I changed the bridge, but then I don't turn the tone knob more than half way up from the low side anyway.
Before I open the wiring up, I thought I'd give you all a chance.
Last edited by frits51 : 11-24-2012 at 08:25 AM.