06-11-2016, 01:13 PM
Look at the slope of Ia vs. Va.
But, ra isn't a well-controlled characteristic of a pentode, varying over a 2:1 range. Fortunately, it's so high anyway, that it doesn't matter in practice.
But, ra isn't a well-controlled characteristic of a pentode, varying over a 2:1 range. Fortunately, it's so high anyway, that it doesn't matter in practice.







