Fender Deluxe Reverb 65, swapped 6v6 and rectifier tube by mistake

[sanmol]

Hi, on a working Fender Deluxe Reverb I managed to put rectifier and 6v6 tubes in the wrong sockets. Now there is only a low frequency hum. I changed all the tubes, still the same hum.
Would be greatful if anybody have som tip regarding fix.

[MWJB]

The amp makes music with the new tubes, just the hum is the problem? Check the 2x100ohm resistors that form the virtual centre tap from the heater windings to ground, you may have burned one up?

[Don Moose]

Also check the screen resistor for that 6V6 socket.

[sanmol]

Hi, thanks for the suggestions. My description of the problem was not accurate. The symptom was a loud low frequenzy hum when switched from standby to on. Since this is a "close to mint" old amplifier I tried to troubleshoot without to much desoldering/damage. It turned out to be a bad capacitor located close to the power lamp, 50mf/50v. Hopefully I'll be more careful next time I change tubes..........

[Amp Kat]

That's very strange that it blew the bias cap but I guess I've seen stranger.