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'm wondering if anyone might have Volumes 1 and 2 of the Audio League Report (1954) edited by Julian Hirsch which they might be willing to part with or have scanned?