Hi, Jac,
I have one of these and it has one channel that is very weak.
I had it repaired 10 years ago By a gentleman in Toronto who has since passed away. They rebuilt one board completely. I'm thinking that it's the other board that is now failing.
Would you feel capable of repairing this unit or know someone who could?
Rick Yurick
PS the reason I want to continue to use it is because I have a decent pair of headphones which I purchased at the same time as I had the unit rebuilt. My original headphones from 35 years ago died