[Amps] Acceptable ripple on high voltage plate power supply...

[Lukasz]

I'm not sure these IMD measurement can be compared between different
setups. I measured the same thing using a tinysa spectrum analyser and I
got completely different numbers (30dB instead of 26dB).

I think if we use exact same equipment ,same tone frequencies, same sweep
time and all the settings then yes, some comparisons can be made, but it's
not like measuring voltage where you can expect two meters to agree with
each other...

Łukasz - SP4IT