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.
Wondering if the 6N1P is equivalent to the 6N7 and the ECC31.
Looking at a tube linstage with 2 6N1P and wondering what alternative tubes can be tried (other than 6922/E88CC with reduce heater current)