N_Cook wrote:
Normal channel missing just mV of output, same with footswitch
supposed operation, lead ch is fine.
Seems to be a rare beast, any pointers to a schematic ?
Uses 4x rc4558 opamps ,2x SJ3692 in PA, seems to use an opamp and FET
for gating on and off "normal" gain channel. Swapped out the 4558s, as
socketed, no change.
Thought found prob on underside , one pot pin had never been soldered,
just touching contact and some ring crack failures or dodgey looking
at pots, but that was just the general crackly performance, clean ch
still absent.
o/p of one opamp is high, same with swapped version, goes to gate of
the FET, which will be the next thing to investigate, if no schematic
found. When last powered I did not think to see if the footswitch
action gated the opamp o/p. Any other ideas?


Send an email to Peavy at or and
ask if they can send you a schematic for your amp. They're usually quick to
respond. Give all the nameplate numbers on the amp to get the correct
schematic. They are (in)famous for making engineering changes to them and
not changing the model or Rev level.
Dave M