diode ID

jeanmarie

AK Subscriber
Subscriber
I have two different diodes in a tube amp. One is marked Semicon S 327, and the other is marked SM 334 si What can I use to replace these with?
 
what amp and what are they doing. Most B+ diodes can be subbed with a 1N4007 or UF4007. Bias supply or something with higher current could need a bit more stout of a diode.
 
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