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Help with Preamp for Yamaha TRB6

Discussion in 'Pickups & Electronics [BG]' started by rybass309, May 24, 2011.

  1. rybass309


    Feb 11, 2011
  2. Musiclogic

    Musiclogic Commercial User

    Aug 6, 2005
    Southwest Michigan
    Owner/Builder: HJC Customs USA, The Cool Lute, C G O
    I am pretty sure you can use any aftermarket pre, as I think the TRB split coils are passive, and just the pre is the active part.
  3. rybass309


    Feb 11, 2011
    I think you are right. Thanks for the help.
  4. ex-tension


    Jun 11, 2009
    The fried part of the original pre is most probably the opamp. You don't need to buy and change all the parts. Try to replace the opamp with a new one and see if it revives the pre. It's gonna be cheap to try.
  5. rybass309


    Feb 11, 2011
    It's not completely dead. The bass pot had snapped off before I purchased it and replaced with a non-yamaha pot that didn't fit correctly through the body so the threads were not exposed to lock it to the body. Well it went in a case, a little pressure and snap goes the pot. I ordered a new pot from yammy, soldered it to the board and now it has gone haywire. When turning the bass pot from full back to mid point, I get a high pitch squeal.

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