Single Coil Noise!

Discussion in 'Pickups & Electronics [BG]' started by Stan_da_man, Jun 16, 2020.

  1. Stan_da_man


    Aug 29, 2006
    Yes, yet another thread.

    Jazz bass. Entwistle Neodymium single coil pickups. CTS 250k pots, Switchcraft Jack Socket, .047uF PolyDrop cap.

    Very loud and powerful. Also a bit noisy. No grounding issues - touching the string or bridge and dead silence. I let go and glorious 60 cycle hum starts.

    Shielding can only do so much. Do you guys just live with it?
    Killed_by_Death likes this.
  2. Arie X

    Arie X

    Oct 19, 2015
    without any hum cancellation via an opposing coil, it's what single coils do. a gate might help -a little.
    bassdude51 and Reedt2000 like this.
  3. Slater

    Slater Leave that thing alone.

    Apr 17, 2000
    The Great Lakes State
    Yup. You get really good at rolling the volume down when you’re not playing. ;)
    MonetBass and Reedt2000 like this.
  4. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    The good news is that if it's silent from touching the strings, proper shielding will help a lot!
  5. sikamikanico


    Mar 17, 2004
    Dummy coil! Active or passive bass? My sense is that for active basses, adding a small dummy coil with lots of turns can work well (kills hum, doesn’t change the tone).

    On a passive bass, such a dummy coil would change the sound. The solution is to wind a large coil (large in diameter) but with fewer turns. It kills hum and minimally changes the sound. Commercially available from Suhr (possibly others), but seems easy to make on your own. The only problem is finding a place for it - it has to be on the same plane (and ideally close to) the pickups. Under the pickguard seems the simplest... Or in a back routed cavity (a large control cavity could work).
  6. Don't wave your hands in the air like you just don't care.

    Word up :thumbsup:
    DiabolusInMusic likes this.
  7. DiabolusInMusic

    DiabolusInMusic Functionless Art is Merely Tolerated Vandalism

    Your issue stops when you touch the strings/bridge/metal - your getting RF interference and your bass requires shielding.

    60hz (single coil noise) would persist when you touch the strings/bridge. It would only lessen when you balance the pickups.
    kodiakblair likes this.
  8. bassdude51

    bassdude51 "You never even called me by my name." Supporting Member

    Nov 1, 2008
    Central Ohio
    Rotate your body and bass until the 60 cycle noise stops. Then freeze! Stay there! Don't move!
    Nashrakh likes this.
  9. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    Stan_da_man and Geri O like this.