Schecter JD Electrical Hum Active EMG Pickups

Discussion in 'Basses [BG]' started by Clark Westfield, Apr 7, 2014.


  1. Clark Westfield

    Clark Westfield Floyd Pepper is my mentor! Supporting Member

    Joined:
    Jan 30, 2012
    Location:
    Central Jersey
    I have a JD Deservio signature model with an electrical hum when playing, almost Jazz bass like.

    The bass has EMG 35hz humbuckers from the factory.

    Does shielding or lack of shielding effect active (18v) pick-ups?

    It happens in all knob positions.
     
  2. Thornton Davis

    Thornton Davis Supporting Member

    Joined:
    Dec 11, 1999
    Location:
    GTA
    Probably more of a grounding issue than shielding.

    TD
     
  3. Clark Westfield

    Clark Westfield Floyd Pepper is my mentor! Supporting Member

    Joined:
    Jan 30, 2012
    Location:
    Central Jersey
    So what is the resolution for a grounding issue.

    What should I look for?

    Ground under the bridge?

    Grounding in my house?
     
  4. Bobster

    Bobster

    Joined:
    Mar 27, 2006
    Location:
    Austin, TX
    35HZs are passive pickups. http://www.emgpickups.com/bass/extended-series/4-string/35hz.html

    I would check shielding (does it start or stop when you touch the bridge or strings) (is it worse around computers or in certain rooms?)

    Do you have good grounds?

    Is it louder when the treble is turned up?

    Is it the same with different amps?

    Best of luck

    Bob
     
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  6. Clark Westfield

    Clark Westfield Floyd Pepper is my mentor! Supporting Member

    Joined:
    Jan 30, 2012
    Location:
    Central Jersey
    It does not change like a Jazz bass when you touch the strings.

    It does not change with tone or volume knobs.

    I have not looked at the electronics yet. Is there a grounding lug inside the cavity? Is there a ground wire under the bridge like a Jazz?
     
  7. Bobster

    Bobster

    Joined:
    Mar 27, 2006
    Location:
    Austin, TX
    Don't have the same bass as you, but on my EMG basses, yes there is a grounding wire under the bridge.

    Try it in a different room. You may be getting some RF from a computer/fluorescent light, etc. If that's the case, shield more.

    Bob
     
  8. Clark Westfield

    Clark Westfield Floyd Pepper is my mentor! Supporting Member

    Joined:
    Jan 30, 2012
    Location:
    Central Jersey
    I apologize about my previous facts, the noise does change with the tone knob. Only the tone knob.
     
  9. Bobster

    Bobster

    Joined:
    Mar 27, 2006
    Location:
    Austin, TX
    It's very likely preamp noise and/or shielding. I recommend shielding foil or paint. But it may take replacing the preamp to truly get rid of the noise.
     

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