Valve datasheets often give one to few suggested sets of operating parameters for a valve in one several modes, and designers are left to sort of interpolate or extrapolate to their own set of parameters, eg loaded power supply voltage.
This article is a walk through and comparison of RF Power Amplifier Tube Performance Computer applied to the subject scenario.
Let’s extract from the Mullard datasheet.
We will use the Va=3kV scenario for this comparison. Continue reading Mullard QY4-400 (4-400) x 2 Class C AM plate and screen