Earthing problem? Yes, that could be it. So Bert, go dig a hole in your garden and bury it.

I always loved the Euro terms instead of the US. Positive earth, negative earth......The first is a hill and the second a hole? Seriously, sometimes the Euro stuff is much more descriptive. Spring dampener is far more accurate than shock absorber.

Anyway, nice find on the amp Bert.

Spaw