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Jazz Bass Grounding/Wiring Problems

Discussion in 'Pickups & Electronics [BG]' started by Think deep, Nov 15, 2012.

  1. Think deep

    Think deep

    Jun 27, 2012
    Okay, I realize there are a hundred threads on this already but I feel as if I've read them all and still can't figure out my problem! I have a used Fender Fretless Jazz Bass MIM that I put Fender N3 Jazz Bass PUPs in. I shielded it with the Stewmac paint, put in some cavity grounds, brass cavity shielding plates, have checked and tried to establish a better ground underneath the bridge with the bare wires, have reconfigured and wired as many different ways as possible and still have a crazy hum. My P-Bass MIA 2011 does not have this problem in the same room on the same amp with the same cables. I read a thread where a guy said he got his bass dead quite with the brass cavity shielding plates from mikecd1,
    Having already had this problem on my modded Jazz bass I opted to install a brass cavity ground plate I bought from darren riley (he stocks ALL Fender parts and ships same day priority). One solder connection to the cavity ground and the plate underneath the rear J pickup was installed. My bass is dead quiet and I am enjoying it for the first time. If your Jazz bass still has some hum after shielding I would suggest a brass cavity grounding plate under both pickups. You might accomplish the same thing by grounding the pole pieces with a strip of copper and a wire to the cavity ground..."

    Here is the link to that thread.http://www.talkbass.com/forum/f38/american-deluxe-jazz-pbass-ground-hum-noise-problem-solved-802153/

    My question being (and I hate to sound electronics illiterate) but what are the "pole pieces" he is talking about? And if someone has had this problem and solved it could you post pictures? Thanks!
  2. SGD Lutherie

    SGD Lutherie Banned Commercial User

    Aug 21, 2008
    Bloomfield, NJ
    Owner, SGD Music Products
    How did you wire up the N3s? Which wire went to hot and which to ground?

    Also, did you run a ground wire to the shielding paint?