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 don't know if this is the right place for such an announcement,but for the interested ones I'd want to let you know that TubeCAD proggie is available on the eMule network (it's packed as a .rar file).
Cheers,