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.
Has anyone used this board and or concept in a ST70 and if so what were the results? I have a pair of 70s modified with soundvalves board and hexfreds etc. They sound nice driving a pair of Spendor 3/5a and Entec sub.