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I'm at a complete loss Squire P-bass buzz!!!!

Discussion in 'Pickups & Electronics [BG]' started by rkingly, Apr 28, 2009.


  1. rkingly

    rkingly "Playing Reverend Basses on a Regular Basis"

    Sep 8, 2007
    Virginia
    Endorsing Artist: Reverend Guitars
    Hi folks,
    I gave a squire P-bass ( Vintage modified wht/black ) to a student &
    decided to swap out both pots & jack. I switched everything & sent him
    home w/it. Brings it back the next week w/broken wire from jack.
    opened her up & re-wired jack & tightened up the whole jack.
    Brings it back the next week w/ a buzz. I opened her up & could not
    find any loose or broken connections. I bought new pots & jack, wire
    & a tone cap, proceeded to wire the whole thing from scratch, BUZZ
    I followed on-line basic p-bass wiring & I'm about to lose my mind &
    possibly smash the friggin thing & give him another beater bass to learn with.
    AAAAAAHHHHRRRRGGGG!!!!!!

    I've wired bass's before with little to no problems & I don't want to
    take her to a shop.
    Anyone with a similar experience out there? Or any words of wisdom?
     
  2. 60bass

    60bass Supporting Member

    Apr 24, 2005
    Charlotte, NC
    Hi

    Maybe I missed it but I don't see a black ground wire between the volume and tone pots? You should still get ground to the pots through the foil but that might not be enough to get a solid connection.

    Black wire from PU should ground to the volume pot and a black wire then to the tone pot and then to the jack. I run my bridge ground wire to the input jack as well.

    White goes from PU to outer lug of volume pot then to one of the outer lugs of tone pot. Then another white from the center lug of volume pot to the input jack, and solder remaining lug of volume pot to ground. That part looks OK but I would replace that black wire you have on the center wiper of the volume pot in there to the correct white so you can see the signal path.

    I would also add in a solder lug screwed into the cavity sheilding and connect a ground fron there to the volume pot like the newer Fender's have.

    I've also sen just a small bit of solder run off get inside a pot and cause buzzing. Just to be safe, spray some contact cleaner in there while you have it open.

    If it still buzzes, I might suspect the PU then.
     
  3. msiner

    msiner

    Sep 2, 2008
    Tucson, AZ
    I'm not an expert, but this is what I noticed first. Right now the bridge and pickup are "grounded" together and the tone pot goes to the jack's ground, but they are not connected. I think there should be a wire from the volume pot case to the tone pot case.
     
  4. 60bass

    60bass Supporting Member

    Apr 24, 2005
    Charlotte, NC
    Yep, the OP needs to "complete" that ground connection so there is a common path to ground for every connection.

    Fender's are almost a "ground loop" the way they wire them. A Strat is really a mess of grounds and IMO can benefit from a good shielding job and star grounding. A P on the other hand is pretty simple wiring and is usually OK provided you hook all the grounds together.

    Keep Low :bassist:
     
  5. rkingly

    rkingly "Playing Reverend Basses on a Regular Basis"

    Sep 8, 2007
    Virginia
    Endorsing Artist: Reverend Guitars
    Thank you for the reply, I'll follow the advice tomorrow.
    I needed that advice, Thought I had it, but what you're
    saying makes sense.
     
  6. 60bass

    60bass Supporting Member

    Apr 24, 2005
    Charlotte, NC
    It should work if you add that wire. Go to mrgearhead.com
    And get the schematic for the USA Am standard P and wire it just
    like that. It shows the ground lug to the cavity if you want to add one
    in.
     
  7. rkingly

    rkingly "Playing Reverend Basses on a Regular Basis"

    Sep 8, 2007
    Virginia
    Endorsing Artist: Reverend Guitars
    FYI Completed the ground circuit to the tone knob & for good measure grounded the whole set -up to ground screw thingy.

    No Buzz!!

    Thanks for the help!
     

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