I had my recently built ST35 amp packed in foam and well protected for a move to a new apartment. It had been working very well before the move with no apparent problems.
So last night I unpacked it and fired it up and immediately hear a buzzing sound coming from the power transformer. Not real loud but if no music is playing it's definitely loud enough to draw attention to it.
Any thoughts on what could be happening here? It was purchased several months ago from dynakitparts.com. I haven't measured anything yet but as far as I can tell the amp still works fine. I even tried swapping power cords but with no change.