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.
Am I correct in assuming is you use a CCS on the cathode instead of a resistor and you don't bypass it you would get no output because there is no current path for the A/C signal?