I am new to this forum and have to say I love it already!! I currently have a Fender Hot Rod Deville (4x10) that has an issue with the channel switch/relay chattering.. I have no clue as to why it's doing this.. Also, at the bias test point there is no mV reading.. I have tried a new set of tubes and even a second set of tubes.. Still no reading.. I have knowledge of electronics and even have performed some pretty cool MODs to these style amps but this one has me operationally stumped... Please help!!
Oh and by the way I replaced the power tube sockets as well with new belton brand sockets, the plate resistors have been replaced, electrolytic caps have been replaced, tone stack caps have been replaced, all solder joints on both boards have been reflowed and have been verified to have no cracks under a magnifying glass, relay switch has been replaced with no effect, input jacks have been replaced with switchcraft jacks.....
