selmer trebble and bass 50r sv crackling sound and treble channel down

[djib bed'o]

Hello everyone,

I am looking for some clues to get that Selmer T & B 50R SV working properly.

For some reasons after I first dismantle the amp and putted back together the clean channel doesn't work any more, valve is fine, wiring is fine... probably an open solder somewhere...

And the main thing is as soon as I switch on the standby the amp starts to crackle, I have been advised to check if there is resistors on the 5th pin of the OT valves and if not to stick in some 1.5k resistors.

do you have any other ideas?

cheers