11-27-2014, 08:29 AM
Good that you sorted it out.
Changing the tubes is always the easiest first thing to try. The problem is, sometimes the new tube can have an issue and hum just as bad as the first one. I once bought several tubes, all the same make and model, the first two that I swapped into V1 hummed just as bad. The third one resolved the issue. Two of the new tubes were bad.
I like to keep what I call a gold set of known good tubes that are only used for testing. It's kind of an extravagance but at least I know that I can count on them.
Changing the tubes is always the easiest first thing to try. The problem is, sometimes the new tube can have an issue and hum just as bad as the first one. I once bought several tubes, all the same make and model, the first two that I swapped into V1 hummed just as bad. The third one resolved the issue. Two of the new tubes were bad.
I like to keep what I call a gold set of known good tubes that are only used for testing. It's kind of an extravagance but at least I know that I can count on them.