"Gareth Magennis" wrote in message
...
Hi,
what is the purpose of the reverse biased diodes on the OPT/Cathodes as in
this Fender circuit?
http://www.schematicheaven.com/fende...er_60_rack.pdf
I need to replace a faulty one and am having difficulty sourcing the part
Fender use (R3000). Does this need to be a specific type of diode or can
I make up the 3kV diode required using standard 1Kv rectifier types?
Thanks,
Gareth.
Thanks for all the information and added confidence.
(Incidentally, I had measured some good R3000's from another amp which
showed a higher than single PN junction Vf - Phil has given the reason why).
Cheers,
Gareth.