[quote name='Billy Apple' timestamp='1381263996' post='2236784']
The amp spent the today in the factory. Matamp could not really pin point the crack I could hear, and they thought the humming noise from the transformer nothing to be concerned about. They replaced the power switch and re-soldered a few bits and pieces they thought looked dry. It was only pushing 160 watts and seeing as the power valves are knocking on 3 years there was talk of replacing them. But, each power valve was tested individually and found to be OK. The drop in power was traced to a duff pre-amp valve which was replaced. The power is back up and I've been saved a new quartet of KT88's for the time being.
Anyway, I'm collecting from my mates on Thursday, and hopefully that's it for the time being.
[/quote]
they only do about 156watts anyway