Gee a light bulb just came on above my head, the factory settings Ceej posted are the total for all tubes in the amp, not one tube or one pair but (TSL100) 4 tubes, 4-EL34's at 90mv cathode& 1 ohm resistor method, = 22.5 ma plate current per tube, a typically conservative factory setting that makes for long tube life, I'm a Dufuss, I'm a Dufuss, I'm a Dufuss.................................