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A question for the fx building/modding folks

Discussion in 'Effects [BG]' started by Kano2864212, Jul 22, 2009.

  1. Kano2864212


    Feb 24, 2008
    Worcester, MA
  2. bongomania

    bongomania Supporting Member Commercial User

    Oct 17, 2005
    PDX, OR
    owner, OVNIFX and OVNILabs
    The jack has three connector tabs in back. One is for - and the other two are for +. The two + are connected by a switch inside the jack, so when you plug a power supply plug into the jack it "breaks" the connection between them. The idea is that the + from the battery normally passes through there, but the connection to the battery is cut off when you plug in the adapter. So solder the - tab to the common ground inside the pedal, and solder one of the + tabs to the battery's + wire, and wire the other + tab to the point on the circuitboard where the battery's + wire used to connect.

    I always get confused about which + tab is which, so use a multimeter to figure that part out. :)
  3. Hookus


    Oct 2, 2005
    Austin, TX
    Same here.:rollno: