It pops the fuse occasionally. I put a brand new rectifier tube and power tubes in. Any other ideas why?It does fine for a whole gig then out of the blue at home it blows a fuse. It calls for a 125V 2 amp. I’m running a 250V 2 amp in it now. It’s working fine. But has it has me concerned it will blow at a gig. Any suggestions at what I might look at inside? Could it be a cap? I notice a slight hum at idle.