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.
I'm wondering if anyone can tell me how to calculate the output impedance of a pentode cathode follower? Would it just be the reciprocal of the transconductance in parallel with the cathode resistance? Thanks!