I have a set of Western Electric 300B tubes in my VAC 30/30 and there is no hum. I have the ground connection lifted on the power cord with a cheater to minimize hum but that was not tube dependent. I would suspect a bad tube. Does it hum in both channels or just one? For what you must have spent on the WE tubes, I would go back to the dealer and get some help.
Advise On Tubes For Vac 30/30
I recently purchased a quad set of western electric tubes to replace the stock golden dragons After installing the westerns got a excessive amount of humming Reinstalled stock tubes and hum was gone Has anybody ever had the same problem and if so how did you correct it Any suggestions on another tube manufactuer Thanks