Members Guitin Better Posted December 26, 2006 Members Share Posted December 26, 2006 Santa brought me a new SX bass for Christmas. It's a P/J style and when I open the J pickup tone pot at all I got this horrific buzz. It stops when I tough anything metal on the bass (strings, knobs, bridge etc.). I think it's a grounding problem . . . anybody agree or disagree or have another idea?? Link to comment Share on other sites More sharing options...
Members bassplayinguy Posted December 26, 2006 Members Share Posted December 26, 2006 that is the nature of the beast when you buy a P/J combo, the single coil has nothing to cancel out the 60 cycle hum with (if you had a J/J bass youd get the same noise if the pickups were not at the same volume but it will be cancelled out if they are at the same volume) You can either try Shielding your pickup and control cavity better, or replace it with a humucking jazz (P pickups are humbuckers by deisgn so they dont hum like the single coil jazz does) Link to comment Share on other sites More sharing options...
Members i_wanna_les_paul Posted December 26, 2006 Members Share Posted December 26, 2006 That sounds like a grounding issue from what I can remember. 60-cycle hum is always present, even when you touch the strings. Here, there's a grounding issue and when you touch the strings, you're providing a good ground so it quits. Someone more helpful should be along shortly. Dustin Link to comment Share on other sites More sharing options...
Members Fireball_73 Posted December 26, 2006 Members Share Posted December 26, 2006 I had that issue with my BC Rich when I played it through an 800W ampeg stack at a rehersal studio once. Never happened again... but I have never used that amp again. Link to comment Share on other sites More sharing options...
Members Guitin Better Posted December 27, 2006 Author Members Share Posted December 27, 2006 Thanks for the posts guys. Anyone else want to weigh in? Link to comment Share on other sites More sharing options...
Members bassman1956 Posted December 27, 2006 Members Share Posted December 27, 2006 Yup. 60Hz buzz. I have an active Iby PJ bass, the J starts buzzing any time I drop the P volume less than about half the J volume. Some people have luck cutting it down if they really do a very particular job at shielding the electronics cavity and the pickup cavity. If you go through that effort, make it as good as possible, and make sure you ground the shielding. And in a spider pattern, with no loops. Link to comment Share on other sites More sharing options...
Members Guitin Better Posted December 27, 2006 Author Members Share Posted December 27, 2006 I'm pretty shure this is NOT a 60 cycle hum. The frequency seems much higher. Link to comment Share on other sites More sharing options...
Members Guitin Better Posted December 27, 2006 Author Members Share Posted December 27, 2006 I don't think this matters, but I'm playing through an electric guitar amp, not a bass amp. Does this matter?? Link to comment Share on other sites More sharing options...
Members BEAD Posted December 27, 2006 Members Share Posted December 27, 2006 Originally posted by Guitin Better I don't think this matters, but I'm playing through an electric guitar amp, not a bass amp. Does this matter?? No, I don't think that should be an issue really, although an amp voiced for guitar might make the buzz more noticable. Be sure not to play though guitar speakers though, you'll probably fry them! Link to comment Share on other sites More sharing options...
Members Guitin Better Posted December 27, 2006 Author Members Share Posted December 27, 2006 Well . . . the amp in question is a combo amp so I guess I am using guitar speakers. What's the problem in doing that? (I'm playing at low volume just practicing at home) Link to comment Share on other sites More sharing options...
Members BEAD Posted December 27, 2006 Members Share Posted December 27, 2006 Originally posted by Guitin Better Well . . . the amp in question is a combo amp so I guess I am using guitar speakers. What's the problem in doing that? (I'm playing at low volume just practicing at home) Guitar speakers just aren't really designed to have to handle a bass signal. Even at volumes you may consider safe you may very well cook your guitar speakers. Link to comment Share on other sites More sharing options...
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