A quick trace of a NOS Tung-Sol 6GE5 measuring around 113%:
Derived the Spice models using Dekker’s ExtractModel tool. The uTracer has a limit of 200mA so it’s not possible to trace the extended set of curves for this valve. However, this is not a limitation to produce a good model.
Here is the triode matching:
I run a set of curves at various screen voltages from 100V up to 200V at 25V steps to generate the pentode model The saturation effect is visible on higher currents above 140mA as you can see below:
Below is the triode model, you can dow Continue reading “6GE5 Pentode Model”