Thank you for your response , we tried everything swap cables , even set it up with other speakers and amp, same problem ,even changed the tubes.. I was told there are many relays in unit . hard to fix.
Audio valve preamp
Does anyone know a tech that has knowledge of this preamp ,it has a dual chassis, the sound on the right channel is weak ,replaced tubes ,I had someone look at it ,put found no problem. There is no schematic for this preamp. I’m on Long Island I would be thankful if anyone can help me find a good tech...