Hoffman adjustable fixed bias mod question

[frankeg]

Hello all, Hope everyone had a great Holiday! I'm installing the Hoffman bias adjust mod on a 67 Princeton Reverb and was wondering if I should replace the original diode as well or wire a new one in parallel with the old just to keep it around. I don't think they make them anymore. Any suggestions? Thanks, frank

[Raybob]

If it's a '67, I'd leave the original in if it works. Don't put two together parallel. If one fails and lets current flow backwards, the other one won't do any good to stop it.

[Amp Kat]

Why replace it if it works. It's not like it's going to go bad because it's old and you'll have the original part for authenic.

[frankeg]

It's staying. Thanks guys.