Please help disconnect extra PA board

Discussion in 'Let's Talk Vintage' started by janalex, Jan 13, 2022 at 7:17 PM.

  1. janalex

    janalex Member

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    What’s the simplest way to disconnect the extra board in a super PA to remove the extra load?
     
  2. Matthews Guitars

    Matthews Guitars Well-Known Member

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    Just disconnect the unwanted stages. Disconnect the plate resistor supplies on the stages you want to disconnect, and disconnect the input leads to the grids.
     
  3. william vogel

    william vogel Well-Known Member Gold Supporting Member

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  4. neikeel

    neikeel Well-Known Member

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    Simplest way is leave tube, leave plate resistor feed etc.
    Just disconnect the green grid wire that brings feed in from the PA board.
    On one amp there was already a hole in the back so I put a switch in so you could bring it in and out.
     
    Bill T and Seanxk like this.
  5. Seanxk

    Seanxk Well-Known Member

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    I've done the same with my 50W PA, I also kept the Valve in situ, but I blew the heater circuit in the Valve so it doesn't use the valuable heater AC in the amp.
     

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