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.
To be more precise, the Pd at no-signal condition in typical zero bias PP-circuit is alraedy some 5.5 W/plate. Plate voltage = 300 V, plate current ~17 mA.
