• 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.

6.3V Rectifier Tube Lit by 5V

amperex

Member
2005-02-20 1:42 pm
MI
My test says wrong..........

The oversized filament in that tube will emit plenty of electrons. On my tube tester with 300 volts and a 100ma load, no dofference from 6.3 to 5 volts. Do expect to derate current to say 80% & expect some lower tube life- no big deal on these cheap tubes.