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.
the August edition of Audioxpress www.audioxpress.com didn't contain the PBasic "code" for the MCUTracer. If you are interested email me at jack@tech-diy.com