I've got an Ampeg SVT 200t amp, owned it for years, and like the sound. It started giving me problems, so I had it repaired/ overall end by the fabulous guys at Surrey amp hospital. Unfortunately it didn't work correctly...took it back ( outside their guarantee ) , and they very kindly gave it a thorough check and found no fault.
The amp plays fine for a few minutes, and then the sound fades away to nothing...then fades back again...this repeats itself. The guys at the amp hospital had it running without any problems running it through one of their cabs. I'm stumped. Is it possible that my cab ( Hartke XL 410) could be the problem?
Any experts out there..please help, I don't want to spend any more money on this amp.