Please help disconnect extra PA board

janalex

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

Matthews Guitars

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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.
 

neikeel

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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.
 

Seanxk

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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.

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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