Diodes on Cathode?
"robert casey"
Looks like the circuit is expecting the diode to start conducting when the
voltage gets higher than the 3KV,
** If the R3000 diode (string) ever conducts in the reverse direction -
that is the end of the diode.
It is NOT a damn zener - you clot - the voltage limiting effect works by
transformer action.
BTW:
There are in fact several ways in that Fender amp the R3000s CAN cop more
than 3 kV in reverse, both at the same time.
Then it is kaput for one of them.
See if you can figure even one of them out.
......... Phil
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