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.
Just received two RCA 2a3's and a mullard GZ37 one of the 2a3's has some silver flecks on the getter side one's base is slight movement and all three have light scratches on their envolopes am I expecting too much.
Nigel
It's a good idea when buying valves to have the project built and working so that you can try out new valves immediately. The vendor won't have any sympathy if it should turn out in six months that one of the valves isn't right...