A Simple, Valve Curve Plotter

[Radio Fixer]

AVO Mk1 and 11 (and beyond) use all AC waveforms. But to verify the tester is working properly (and various fudge factors are correct) a "Standard Valve" is recommended to be tested occasionally. This is a valve that is measured on DC supplies (apart from the heater unless you have a handy and trustworthy low voltage bench supply) for emission and Gm: I have made a few.

Gary