Please help disconnect extra PA board

[janalex]

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

 

[Matthews Guitars]

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.

 

[william vogel]

Pull the tube.

 

[neikeel]

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]

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.