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.
That simple Sinclair-Peterson based full triode and GNFB free OTL amp. have potential to sonically outperform many of the finest SET amps , specially in the case when is paired with appropriate higher Z loudspeaker .