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.
By the way, what are these 4 little plastic things called, that are used in each corner to fasten the plexiglas top plate to the chassis? And where can I get them. I have lost all 4.