u/Better_Han_Solo

well nothing extraordinary has been done here.

any other mods are related to the preamp/phase inverter

1. plate voltage from pin3 to ground is 501.5
2. bias voltage from pin5 to ground is negative 47.9 when standby on and 46.8 when standby off
3. screen voltage from pin4 to ground is 502V

I will take out poweramp pcb to see what is going it, but it already had traces of burn under those 700ohms screen grid resistors. That's why I changed them for 1k

+ I added electrical fan but I just took wires from F1, add additional full wave rectifier to power the fan and it's working so that is not this

Recapped whole amp and modded to handle el34. Somewhere I must have fucked something up. all 4 tubes. it's 6505+.