i built this amp a while ago and all the voltages checked out, i had 215 volts B+ but now the voltage has bumped up to 250 for some reason and i cant determine why that is. i guess there isnt enough voltage drop across R1 so that means that the tube isnt pulling up enough current, im not sure where to go from here. maybe i can just increase the value of R1 but that doesnt really solve the mystery...
any ideas?
thanks
any ideas?
thanks