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.
Hi everyone, just before i get my boards made for my amplifier, i just want to confirm that it is ok to connect pin 9 (shield) to ground on the ECC88 tube, when the heaters are ran off 6VDC, with pin 5 hot and pin 4 grounded.