Have run this amp off & on far 10 plus years. The other nite it started to chatter when i would key. Was going to clean the relays, but only way you can that is remove the relay. You can turn the variable a little bit it will work okok, then do it again.
Just asking about possible problems before i pull the relays out. Wondering about the 2.2K resister soldered across the legs of the variable? Jim/238