Tube Amp Archive

Thanks a lot for the comments.
Makes sense that it could be the design of the pcb.

Hi all. Looking for some sage advise if possible. I was looking at my old dead amp, its an Ashdown(before they became Hayden)Peacemaker 60 to see if the schematic differs from the pcb. It does. The four preamp valve heaters run off a 12.5 volt regulated supply. On the pcb valves 1 and 2 Pins 4 are 1...