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.
Sometimes I am confused that some tube amp designers are based on Scientific method that the specs of 300B tube are the same so they said don't get rid off for expensive produce. However, a lot of people can tell the different.
