Microwave Sharp R520LK, diode T3509-6D, after looking around for replacement, think this is a 300mA, 9KV diode, and is no longer available from Sharp. Not electronic savy enough to know what can be used as replacement. Local appliance part store has "universal diode", but they could not tell me it's rating or anything about it, so looked some more and found several 12KV, 300mA diodes listed. Can these be used as replacement? Ran test on magnitron, transformer, capacitor and diode was only thing that was way out of whack. When turned on everything seemed to be working, but was making really loud humming and zero heat. This happened all at once, worked fine and next time it didn't. Replaced one of the door safety switches on this unit about 2 years ago, but other than that has worked fine for about 7 years. Advice and source for replacement diode would be highly appreciated
Enli.
Enli.