My interpretation of the piece about the Marshall schematic for my amp (TSL100) is the measurement is 90 Mv through two tubes, or 45 Mv per tube, and then you repeat the process from the other pin to get the measurement for the second pair. Does this seem reasonable to those that understand this sort of thing?


(oops I was on page 1 of the thread and didn't see the other responses when I posted this seems you reached the same conclusion)