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 am building my third srpp ecc82 and I think I build it with with one channel sharing both tubes. I think it must be a advantage that you can replace only one tube and you do not need matched pairs of tubes? A