mcandrewsoun
Well-known member
I currently have one on my bench. I replaced two drive transistors, and the associated power resistors. I also did the cap kit and reflowed several joints on the board. What generally causes the driver transistors to blow? Now, I need to test it.. There is a 3 pin input... Looking at the way its connected, and the fact that it blows a gfci when I turn on my variac...Does this use balanced power? If so.. I have no way to test this.