Basically, this is the inevitable end of most Standby switches in Fender amps and any amp with a similar setup. When I replace them, I put a .1uF/600V cap across the connections...Carlings are narrow. I've been in amps where a previous tech bent the lugs. Not the worst idea.
Merlin, The Valvewizard suggests a resistor across the standby switch terminals to eliminate the pop. It also eliminates the inrush current when you close the switch because it allows a 'trickle charge' of the filter caps. I do it to all my amps with standby switches.
Would the same type of fix apply to an amp with switchable output? My Blackheart amp has popped loudly when switching between 15 and 7 watts since new. It would be nice to put an end to that.
Would the same type of fix apply to an amp with switchable output? My Blackheart amp has popped loudly when switching between 15 and 7 watts since new. It would be nice to put an end to that.
That output level switch is probably a pentode / triode switch similar to this Bassman mod I did to my 5F6A build. It pops too but I don't think there's much you can do to prevent it due to the instantaneous change in power tube screen voltage when the switch is flipped.