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  • piezo bridge ground

    hello.

    new here with a ground wire question. can’t seem to find the right answer/wiring diagram or anything other than suggestions on better piezo systems/comments on why i should get different duncans, why do i want two volumes, why no tone knobs… - etc.
    any help would be greatly appreciated.

    i’m installing a cheap/quick kaish piezo tune-o-matic bridge with volume (and POSSIBLY a tone knob) alongside a duncan str-1 (neck)/duncan pegasus (bridge) combo. the duncans will be set-up with a three-way toggle between them, one volume for each and no tone knobs. the switch will be solely for selecting between the duncans as the kaish and the duncans combo will have SEPARATE output jacks since i don’t plan on “blending” them onboard. the kaish itself has a braided shield wrapped around a signal wire and nothing else.

    my question is: do i still need to (if so how do i) get the existing ground wire from the tailpiece to both systems? could i just sort of daisy chain the ground wire from the tailpiece to the kaish vol/tone pot and onto the duncan vol/tone pot? i’ve seen the same installation done with the same basic set-up except it was for a STEREO jack with a switch to blend the two systems.

  • #2
    just did that with the same bridge myself last weekend
    the braided shield is the ground and that tiny conductor in the center is the signal

    I put a 100k linear pot on mine for a volume
    ground is the outside of the pot>#3 outside leg of the pot>to the sleeve or center conductor of the jack
    signal wire from pick goes to center leg (2) of pot
    tip of Jack (dont solder to the actual tip but o the tab on the base) to (1) of the pot

    on the pot
    holding the pot with the bottom facing you and the legs oriented towards you
    count from left to right
    (3) on the right------Ground
    (2) in the center----signal from Kaish Pickup
    (1) on the left--------signal from Jack

    EDIT:
    I moved them around hold your pot up to the screen with the bottom facing you
    and it will line up


    on the jack
    the tip is the outside leg to the tip of that arm that sticks over the top (signal goes here
    the sleeve is the the barrel of the jack ( ground goes here )


    seriously the back of the pot has to get seriously hot to form a puddle of solder
    I didnt do that on mine
    just to the outside (#3) leg works

    you can wire straight to the jack if you want
    but it is super loud and spikey
    you will want a volume control or it will howl in front of an amp

    I wired a single jack with two volumes just as described about

    the jack has two wires off the tip
    and two wires off the sleeve
    one to each pot as described

    this makes the two pots independent
    rolling one off doesnt short out both pots like Most LPs do

    anything else you need?


    ehdwuld
    A Ficus
    Last edited by ehdwuld; 09-14-2021, 04:00 PM.
    EHD
    Just here surfing Guitar Pron
    RG2EX1 w/ SD hot-rodded pickups / RG4EXFM1 w/ Carvin S22j/b + FVN middle
    SR500 / Martin 000CE-1/Epiphone Hummingbird
    Epiphone Florentine with OEM Probuckers
    Ehdwuld branded Blue semi hollow custom with JB/Jazz
    Reptile Green Gibson Custom Studio / Aqua Dean Shire semi hollow with piezo
    Carvin Belair / Laney GC80A Acoustic Amp (a gift from Guitar Player Mag)
    GNX3000 (yea I'm a modeler)

    Comment


    • #3
      Originally posted by ehdwuld View Post
      just did that with the same bridge myself last weekend
      the braided shield is the ground and that tiny conductor in the center is the signal

      I put a 100k linear pot on mine for a volume
      ground is the outside of the pot>#3 outside leg of the pot>to the sleeve or center conductor of the jack
      signal wire from pick goes to center leg (2) of pot
      tip of Jack (dont solder to the actual tip but o the tab on the base) to (1) of the pot

      on the pot
      holding the pot with the bottom facing you and the legs oriented towards you
      count from left to right
      (3) on the right------Ground
      (2) in the center----signal from Kaish Pickup
      (1) on the left--------signal from Jack

      EDIT:
      I moved them around hold your pot up to the screen with the bottom facing you
      and it will line up


      on the jack
      the tip is the outside leg to the tip of that arm that sticks over the top (signal goes here
      the sleeve is the the barrel of the jack ( ground goes here )


      seriously the back of the pot has to get seriously hot to form a puddle of solder
      I didnt do that on mine
      just to the outside (#3) leg works

      you can wire straight to the jack if you want
      but it is super loud and spikey
      you will want a volume control or it will howl in front of an amp

      I wired a single jack with two volumes just as described about

      the jack has two wires off the tip
      and two wires off the sleeve
      one to each pot as described

      this makes the two pots independent
      rolling one off doesnt short out both pots like Most LPs do

      anything else you need?


      oh, man - i feel bad that you went into such detail, tho i do appreciate it.
      all of that work is done - i was concerned with the ground wire from the stop-tail to the pot that is normally present on tune-o-matics. i wasn‘t sure if connecting it the way i described (chained between the piezo pot and one of the two duncan pots) would just cause more hum than it killed, or if it even needed to be connected to both. i assumed so because of the two completely separate control set-ups/jacks.

      Comment


      • #4
        No it doesn't
        EHD
        Just here surfing Guitar Pron
        RG2EX1 w/ SD hot-rodded pickups / RG4EXFM1 w/ Carvin S22j/b + FVN middle
        SR500 / Martin 000CE-1/Epiphone Hummingbird
        Epiphone Florentine with OEM Probuckers
        Ehdwuld branded Blue semi hollow custom with JB/Jazz
        Reptile Green Gibson Custom Studio / Aqua Dean Shire semi hollow with piezo
        Carvin Belair / Laney GC80A Acoustic Amp (a gift from Guitar Player Mag)
        GNX3000 (yea I'm a modeler)

        Comment

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