Master Volume ideas...

[bren-hur]

Right... heres one for yous... probably totally unneccesary...

switchable pre-PI/post-PI MV!!

using a 4PDT switch and a dual gang 1M pot... I happen to have both on hand..

[shredhead]

After doin' the grounded power cord mod to any amp, remove the polarity switch and use the hole for a MV. Works every time.

[MWJB]

+1 for Alex's switched pot idea, I have used this on the Trainwreck type 4, SPST on the ground connection, when switched off & set CCW, it's totally out of the circuit.