Home Forums GuitarPCB Build Support Sunn Model T: Switch Issue (Solved) Reply To: Sunn Model T: Switch Issue (Solved)


Your measurements are correct.  Take a look at the schematic and you will note that the Drain for Q4 is connected directly to the +9V supply.

The reason your BOTH switch position isn’t working is because you have the switch wired incorrectly.  Consult the build documents for 2 different possible switch wiring guides.  This depends on the brand of switch you have.