@faustuss You seem to be making it my fault about something you claim is universal with all tube amp manufacturers. I've simply corrected erroneous statements in your posts. That is not a reflection on who you are FWIW, or what I think of you. Its simply a matter of getting things straight.
You didn't explain what was meant by an OTL driving resistors. Atma-Sphere is the oldest OTL manufacturer in the world; no-one has ever made a comment like that to me so it piqued my curiosity.
Its a simple fact that if one is measuring an amplifier and their AC line has insufficient current then there will be a Voltage drop which should be corrected if one wants to make accurate measurements. A typical home AC line is 15 Amps. If you are measuring an amplifier that really should be plenty of current for all but the very largest of amps made. Our MA-3 makes 500 Watts and is able to run on a 15 Amp line; a 1000 Watt solid state amp could too so I really do not understand what your beef is. At any rate anyone doing such tests should have access to a variac. Its a basic sort of thing when doing test and measurement.

