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Gibson Grabber electronics question

Discussion in 'Pickups & Electronics [BG]' started by Shinbone, Jun 19, 2019.

  1. Jun 19, 2019 #1
    Shinbone

    Shinbone

    Dec 21, 2006
    Fleming Island, FL
    Hi. It's my first time posting in this forum, so I hope this is the right place. Anyway, I need some help from those in the know. I'm trying to bring a 76 Gibson Grabber back to life. The pots are shot, the jack is bad, but the pickup seems ok. I've replaced the pots (250k audio taper) and the jack, reused the original capacitor. The bass has good output now but my problem is that there is very little range in the volume control. When I turn the knob it seems like it just goes from full volume to off. I'm certain that everything is wired correctly. Is this common behavior for this model or did I use the wrong type of pots or something? Could a bad tone cap cause this? Any help would be greatly appreciated. Thanks.
     
  2. Jun 19, 2019 #2
    bholder

    bholder Affable Sociopath Gold Supporting Member Supporting Member

    Sep 2, 2001
    Vestal, NY
    Received a gift from Sire* (see sig)
    Wrong type of pot, most likely. You want audio taper not linear (I believe).
     
  3. Jun 19, 2019 #3
    Beej

    Beej

    Feb 10, 2007
    Vancouver Island
  4. Jun 19, 2019 #4
    Clark Dark

    Clark Dark

    Mar 3, 2005
    earth
    You want Linear taper on your volume pots, Audio taper on your tone pots.
     
    bholder likes this.
  5. Jun 19, 2019 #5
    Shinbone

    Shinbone

    Dec 21, 2006
    Fleming Island, FL
    Thanks. I will try a linear taper.
     
  6. Jun 19, 2019 #6
    sikamikanico

    sikamikanico

    Mar 17, 2004
    Where do you experience the volume drop, the first part of the turn, or the last part of the turn?

    If the first part of the turn (where 9 or 8 is much quieter than 10), you may have a very steep log/audio taper. I guess it could be due to low tolerances, or just the nature of that particular pot. So you'd want a different audio pot, or a liner pot (many prefer linear pots for volume). Or, I wonder - is it possible you wired it wrong?

    If you have little change in volume for most of the turn, than all of it goes at the end, that sounds like a linear pot. You'd want audio/log pots. But you said you got audio pots... Double check the markings?