• 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.

UL P/P KT88 Class A


2009-10-26 1:43 pm
As a curiosity, since Marshall used the U/L operation to get 200W from 4 KT88's running in push-pull in its famous Major amp, I just wonder how much power can be squeezed out of two of them operating in class A in U/L mode. I'm thinking (and maybe with little acknowledgement of the tubes needing to "rest" once in a while...) that if you can get nominally the rated dissipation of plate and screen as your output power for class AB operation, it shouldn't be impossible to get half that for class A? And, if not, how close can you get before the onset of cut-off or grid loading?