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Super Lead 1959 Clone Hum

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  • Super Lead 1959 Clone Hum

    Voltages are correct, and everything is working normally on this new build, except there is a low (but annoying) 60Hz hum when the Presence control is turned up...with the Presence turne to zero, there is no hum. Turning it up increase the volume of the hum.

    Pulled V1 and V2 one at a time....hum persists. Pulled V3 and the hum disappears.

    So far I have only moved the wires on V3 around a bit, as well as the wires on both ends of the NFB resistor...no change in the hum.

    Any ideas what I should look at next? Thanks for your help!

  • #2
    Sounds like a gounding issue.

    Where is the presence pot grounded?

    Comment


    • #3
      to the bus wire along the back of the pots

      Comment


      • #4
        right on, jpf! bad solder connection at presence pot ground lug...thanks a million!

        Comment

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