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.
Good news. I had a brief message from Mr. Duttman. Eli said his “health could be better”, but that he was basically taking some time off, and hoped to return “in the not too distant future” to participate selectively.