[trobbins]

RDH4 frequency is 60Hz, not that it makes a significant difference. Also the 50 ohm effective resistance is typically included in the PSUD2 transformer model for clarity, again not that it makes any calculated difference.

Schade curves are imho more of a mathematical approximation, and given the generalised nature of both Schade curves and PSUD2 models, it is well worth noting that calculated values have likely confidence of not much better than 5%. Meaning that any result should really be rounded to about 2 digits and at most 3, and the comparisons are effectively saying the results are the same. And then relating that to an actual measured circuit is also fraught with generalisations, including the distortion of the mains waveform and whether the valve is a good example of a bogey and the metering accuracy.