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 bought a pair of Amperex C1150/1 tubes and need any information I can get on them, especially filament. It is a beam tetrode with top cap anode connection.