Hi Richard,

One channel is good, the other has a problem.

I have not had much time to look at it, however I feel it is unlikely that a short circuit on the transformer is unlikely. It seems to be a problem after the amp has been turned on for a couple of minutes.

I owned a lot of these amplifiers a few years ago; I picked up a couple faulty off Ebay. They had both been modified to work in Bridge mode. both not working.

The first one was an easy fix, one of the 3020's was faulty. the second amp has a different fault.. I am confident I will fix it but a daigram will be helpful.

Best regards,

Nick