If one of the tubes are not within it's spec, the amp will see it within 1/60 of a cycle and continue to try and correct it within every 1/60 of a cycle while limiting current to the tube, which turns the LED red, if you turn the amp off and then on again and the problem is gone for awhile, that could mean the tube warmed up and is now operating within it's specs.
So as Oneprof suggested, please swap the tubes from one channel to another and see what happens, I suggest only doing the outputs firsts and try it that way for a while and see what happens.
It would also help to know the age of the amp.
Please feel free to e-mail me.
Allan
So as Oneprof suggested, please swap the tubes from one channel to another and see what happens, I suggest only doing the outputs firsts and try it that way for a while and see what happens.
It would also help to know the age of the amp.
Please feel free to e-mail me.
Allan