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.
Diodes will make ugly waves on the heater wiring. Why pay $1 more to make worse power than a resistor? Is your brain-power to calculate a resistor so precious?
