No schematic available that I could find, unfortunately. Found the pinout of this particular transistors here: http://www.theremin.us/144/142transistors.htm
I made some notes when testing the transistors with the diode test function on my dmm. They all tested the same:
source to drain - .133v (both directions)
source to gate - .733v (no reading with leads reversed)
gate to drain - .733v (no reading with leads reversed)
Something concerns me, and I'm not sure if it's related to the problem, but the amp uses a Mallory can type capacitor with the values, (2x) 20uf, 450v, (2x) 100uf, 50v. The cap is getting extremely hot. At least as hot as the 6L6, which are running with nearly 500v on the plate. I have these values on hand so recapping will not be a problem, but wondering if these things could be related.
I made some notes when testing the transistors with the diode test function on my dmm. They all tested the same:
source to drain - .133v (both directions)
source to gate - .733v (no reading with leads reversed)
gate to drain - .733v (no reading with leads reversed)
Something concerns me, and I'm not sure if it's related to the problem, but the amp uses a Mallory can type capacitor with the values, (2x) 20uf, 450v, (2x) 100uf, 50v. The cap is getting extremely hot. At least as hot as the 6L6, which are running with nearly 500v on the plate. I have these values on hand so recapping will not be a problem, but wondering if these things could be related.