• 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.


Hi Group,

Excuse me if I repeat, but all my current thoughts are dictated by the content of the following site. OK - its Japanese - Altavista assists - but this guy substantiates his progressive evolution of a thought upon a design with graphs and measurements - scroll down to the 300B.....

ps - if you have any 2SA1967 thewn let me know....