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Discussion in 'Pickups & Electronics [BG]' started by dremy2006, Mar 8, 2013.

  1. Good morning, I have 18 volts in my bass and my batteries are going dead quick. what can be some of my problems? trouble shoot

  2. Maz


    Jan 9, 2011
    Let's start with the obvious: are you leaving the jack plugged in when you're not playing?
  3. This happened to me once. Did a search on here and found that I wired my jack wrong. It played alright, but the way it was wired, it was always on. I think it was the ground and the 9 volt power supply leads were switched. You may want to look at that too.
  4. khutch

    khutch Praise Harp

    Aug 20, 2011
    suburban Chicago
    You would need to tell us what bass and preamp you have. Some preamps draw a lot of current, some draw very little, so some basses will drain batteries rapidly and there is nothing to troubleshoot because that is just how they are. On the other hand as Maz says if you want to prevent rapid battery drainage you must unplug the bass when not using it. All active basses go through batteries much more rapidly if you leave them plugged in all the time.

  5. mystic38


    Dec 4, 2012
    Mystic CT
    define "quick"..

    150hrs is not uncommon for a pre-amp spec, which is less than a week if you leave it plugged in...or 6 months if you play an hour a day.
  6. Nope..
  7. About 24 hours in a month.... 6 hours in a week...I've change the batteries out 4 times since mid December of last year...
  8. It's a custom made bass with bartolini preamp
  9. mystic38


    Dec 4, 2012
    Mystic CT
    So, assuming you unplug your bass when you dont play, then it is most likely that it is wired incorrectly..

    I cannot imagine any preamp lasting only 24hrs total run time.
  10. khutch

    khutch Praise Harp

    Aug 20, 2011
    suburban Chicago
    I don't see any current information on their website and I don't have one. Probably someone here knows what they typically draw. A 9v battery has about 600mAhr capacity so it would have to pull 25mA to eat a battery in 24 hours.

  11. SGD Lutherie

    SGD Lutherie Banned Commercial User

    Aug 21, 2008
    Bloomfield, NJ
    Owner, SGD Music Products
    Another problem I have seen is the jack getting twisted and then having the (-) wire from the battery touch shielding paint or foil. That left the battery on all the time, even with the jack removed.

    Something is surely mis-wired or shorted in that bass.

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