Vintage p bass pickups re-polarization

Discussion in 'Pickups & Electronics [BG]' started by geddy402, Feb 21, 2014.


  1. geddy402

    geddy402

    Joined:
    Jul 20, 2012
    So I was looking at a vintage p bass and the seller said the d string is a little weak. Guess he took it to a pickup guy and said the polarization was reversed or something on that part of the pick up. Does this process change anything to how the bass sounds or change anything else to the tone of the bass? I'm not to familiar with this process or how a pickup can become reverse polarized. Is this a signal for more problems down the road? Thanks for the help!
  2. geddy402

    geddy402

    Joined:
    Jul 20, 2012
    Here's what I know...

    It was a polepiece magnet that has reversed polarity...3 have north/ south polarity and 1 has south / north polarity...the entire pickup will be recharged for correct polarity
  3. uOpt

    uOpt Supporting Member

    Joined:
    Jul 21, 2008
    Location:
    Boston, MA, USA
    Complete reversal on one rod from age sounds unlikely.
  4. geddy402

    geddy402

    Joined:
    Jul 20, 2012
    Yeah I thought it sounded weird.
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  6. P Town

    P Town Guest

    Joined:
    Dec 7, 2011
    Simple test: Use a magnetic compass to verify the polarity.
    Even a cheap toy compass, (you could even make one if you are handy).
    Know any boy scouts?
  7. geddy402

    geddy402

    Joined:
    Jul 20, 2012
    I don't have the bas...info is of the seller.
  8. GlennW

    GlennW Supporting Member

    Joined:
    Sep 6, 2006
    That won't work with just one magnet on a P bass coil because there are three onther magnets affecting the compass.

    If you had one alnico rod, or a HB bar magnet, you could move it close to the rods in the coil one at a time to determine if one was a different polarity from the rest.
  9. geddy402

    geddy402

    Joined:
    Jul 20, 2012
    So you guys think one pole can get reversed?
  10. knarleybass

    knarleybass Supporting Member

    Joined:
    Apr 6, 2005
    Location:
    Tustin, CA
    Disclosures:
    Owner of Ulyate Instruments
    yes, alnico magnets can be re "charged" and the polarity can be changed. I can do it for you
  11. geddy402

    geddy402

    Joined:
    Jul 20, 2012
    Does it effect pickup output or tone?

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