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.
6135 (or GL6135) is a ruggedized single pin triode with 7-pin base and mu of ~21. Power handling is an impressive 3.5 watts. Peak impact acceleration 600 G's