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.
hey-Hey!!!,
Never seen such a thing. You could come close to 6BX7 with a pair of 7C5( loctal analog of 6V6, wired triode ). IMO, the 7C5 pair would be the preferred sol'n.
cheers,
Douglas