WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
I have a similar problem, I got only 18v on anode of v5, is this normal? From the schematic, R20 is draining some of the voltage. With the v5 pulled, I got 60v after R18. Can any body help?