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250k or 500k pots for a jazz bass?

Discussion in 'Pickups & Electronics [BG]' started by maturanesa, Dec 21, 2010.


  1. maturanesa

    maturanesa

    Joined:
    Feb 6, 2010
    Location:
    Buenos Aires, Argentina
    I checked out today the resistence of mi Fender MIM pots and they read 115k !!!!!!!

    I can´t believe how Fender can be so cheap and cheat the costumers in that way...

    Now i got to buy some new pots but i dont have any experience replacing them, i always played with the pots that every bass come with..
     
  2. bobalu

    bobalu

    Joined:
    Oct 1, 2004
    Location:
    above the 49th
    A Jazz Bass will use 250K pots. Keep in mind that potentiometers are variable resistors (changing as you turn it). Make sure you have the pot wide open when you test it.
     
  3. maturanesa

    maturanesa

    Joined:
    Feb 6, 2010
    Location:
    Buenos Aires, Argentina
    Both pots goes from 0 (min) to 115 k (max)
     
  4. walterw

    walterw Supportive Fender Gold Supporting Member

    Joined:
    Feb 20, 2009
    are they still wired up in the bass? if so, that's what you'll get, as the two 250k pots are in parallel, and will nominally net you about 125k.
     
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  6. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    +1.

    It sounds like you probably measured the resistance with the bass still wired up.
     
  7. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    I would bet money that Fender does not manufacture pots.

    Also, how is it cheating the customer to use a different pot value?:confused:
     
  8. walterw

    walterw Supportive Fender Gold Supporting Member

    Joined:
    Feb 20, 2009
    right, when you buy pots you don't pay per ohm :p
     
  9. levis76

    levis76

    Joined:
    Apr 14, 2007
    Location:
    48313
    Yeah, I usually pay by the ounce for my pots. :D
     
  10. Richard G

    Richard G

    Joined:
    Jun 16, 2009
    POT??..call the fuzz....
     
  11. Craig_S

    Craig_S Banned

    Joined:
    Oct 15, 2008
    Location:
    Metro Detroit
    ugh...
     
  12. 80'sRocker

    80'sRocker

    Joined:
    May 15, 2010
    Location:
    Saratoga Springs, NY
    I'm wondering the same question so this thread will help me too. Thanks
     
  13. acebase62

    acebase62 Supporting Member

    Joined:
    Jun 29, 2010
    I use 500k volume pots in my Warmoth JJ.

    It has Seymour Duncan Hot Stack pickups, and I prefer the 500k with them.

    FWIW, I also use a Fender TBX tone control.
     
  14. Ric5

    Ric5 Supporting Member

    Joined:
    Jan 29, 2008
    Location:
    Colorado
    I never like a passive jazz or p-bass. I end up putting in a 3 or 4 band preamp. But if Was to wire a jazz or pj or p-bass I would use 250k ohm volume pots. And for the tone pots either 250, 330 or 500k ohm pots. The lower the number the warmer and darker the bass will sound. The higher the number the brighter it will sound.
     
  15. madmatt

    madmatt

    Joined:
    Apr 28, 2009
    I use 500K, one per pickup.
     
  16. maturanesa

    maturanesa

    Joined:
    Feb 6, 2010
    Location:
    Buenos Aires, Argentina

    The pickups wasnt wired to the pots at that moment.
    I was getting some unbalance between neck and bridge pickup, so, when i check the resistance for eah other, bridge pup reads 1.3k more (both pups wired to the pots)
    So, i check the pups resistance not wired and there was not such difference.
    That make me think in a cheap pot issue... or not?

    the result was:

    Neck pup wired to the pot= 8.3k not wired = 9.6k
    Bridge pup wired= 9.4 not wired= 10.2
     
  17. BuffaloBass

    BuffaloBass Supporting Member

    Joined:
    Aug 17, 2005
    Location:
    conditional upon harmonic Hz
    maturanesa might have measured these wired in. BTW, I thought rule of thumb was 250K passive , 500K active.
     
  18. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    That's normal. The bridge pickup should have more wire than the neck, and thus, it's resistance to a direct current is greater.


    Those measurements mean absolutely nothing. They are not relevant to determining anything.

    If you want to figure out what parallel resistances should be, however, remember the formula R[SUB]Total[/SUB]= 1/([1/R[SUB]1[/SUB]]+[1/R[SUB]2[/SUB]]+...[1/R[SUB]n[/SUB]])
     
  19. maturanesa

    maturanesa

    Joined:
    Feb 6, 2010
    Location:
    Buenos Aires, Argentina

    thanx!! So, it seems like the the luthier winded to balance but he go just too much with the difference. I got to order a hotter neck
     
  20. wshines1892

    wshines1892

    Joined:
    Nov 19, 2009
    Location:
    Louisville, KY
    I fancy 250k myself, but to each their own.
     
  21. Shoewreck

    Shoewreck

    Joined:
    Jan 6, 2007
    Location:
    Saint Petersbourg, Russia
    Have you noticed the screws around pickups? Thye're not only supposed to keep pickups in their places, but also to adjust their height when needed. Raise neck pickup a bit and you will notice a better balance.
     

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