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Pls check this for me: Series/parallel dpdt and star grounding

Discussion in 'Pickups & Electronics [BG]' started by sheepdog, Apr 28, 2004.


  1. sheepdog

    sheepdog

    Feb 20, 2003
    Birmingham, AL
    okay, just to make sure I have it right....


    for pots (when viewed from the bottom of the pot): left to right 1 (left), 2(middle), 3(right)

    for the dpdt:

    AB
    CD
    EF

    use of "->" means a wire soldered between the two points.

    ____________________________________________________

    hot from neck pickup to neck volume, lug 2
    ground from neck pickup to dpdt, lug C

    hot from bridge pickup to dpdt, lug D
    ground from bridge pickup to star ground

    dpdt C -> dpdt B
    dpdt E to star ground
    dpdt F to bridge vol pot, lug 2

    neck vol pot, lug 1 -> neck vol pot, lug 1 -> tone pot, lug 2

    tone pot, lug 3 -> .05mf cap -> star ground

    bridge ground wire -> star ground

    star ground -> ground on jack


    Does this sound correct. This is complex for me, so it might be wrong.
     
  2. geshel

    geshel

    Oct 2, 2001
    Seattle
    Some corrections / additions:

    hot from neck pickup to neck volume, lug 2
    ground from neck pickup to dpdt, lug C

    hot from bridge pickup to dpdt, lug D
    ground from bridge pickup to star ground

    dpdt C -> dpdt B
    dpdt E to star ground
    dpdt F to bridge vol pot, lug 2

    neck vol pot, lug 1 -> bridge vol pot, lug 1 -> tone pot, lug 2

    tone pot, lug 3 -> .05mf cap -> star ground

    neck vol pot, lug 3 -> star ground
    bridge vol pot, lug 3 -> star ground

    bridge ground wire -> star ground

    star ground -> ground on jack
     
  3. sheepdog

    sheepdog

    Feb 20, 2003
    Birmingham, AL
    Thanks, those were careless errors on my part. They were drawn on my schematic.

    So this should work? If I am grounding the pots and the shielding (on the bottom of the control cavity cover) to a single point, shouldn't I isolate the pots from the shielding somehow?
     
  4. geshel

    geshel

    Oct 2, 2001
    Seattle
    AFAIK that looks good.

    I don't know why you'd need to isolate the pots from the shielding. I don't think a real "star ground" is necessary. If the entire control cavity is shielded, ground loops aren't really a problem.