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My 1st tube amp: transformer buzz audible 15 feet?

I recently purchased my first tube integrated amplifier from a local shop. I continue to have problems with a buzz coming from the transformer, which I can easily hear while 15 feet away. Is this normal? Do I have a defective unit?

So far, the transformer cover has been tighten by the shop, and I plugged it into a variac to bring the voltage down from the 120-122 volts coming from my outlets.

After two weeks, I find the buzz unacceptable. Any ideas?
jackpage
birdies
85 posts
 
Jaybo is correct.
ahendler
416 posts
 
If this is a new unit and the shop is local tell them you want a replacement. You should not hear any buzz coming from the transformer. Do try a cheater plug which will lift the ground
Also you could bring the unit to the dealer, hook it up and see if it buzzes. If it does demand a new unit
Alan
mechans
3,048 posts
 
Jaybo is correct times 3.
You don't have to suffer in this hobby.
In fact it should be outlawed.
Nervosa maybe nothing worse.
roscoeiii's avatar
roscoeiii
1,155 posts
 
It could be that you have DC on the line. I had this problem in my last apartment with my FirstWatt F1. There are two devices you can get to solve the problem (if it is in fact DC on the line!): the PS Audio Humbuster and the CI Audio XDC-2. Both are sold with 30 day money back guarantees, so if they don't fix the problem you are only out shipping costs. Both companies often have these as B stock as well.

May be that this isn't your problem, but solved my chassis hum problem pronto. One way to tell if DC might be the problem: was there an hum when plugged in at the audio shop you bought it from?
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