Voltage Table for Models 188, 260, 469, 469D, 469Q, 480, 558, 558D, 558Q, 612, 627, 812
Turn silencing adjustment full clockwise, tonebeam adjustment full counter-clockwise, range switch at local.
All plate, screen and grid measurements are made from cathode in heater-type tubes and from -F in plate-filament-type tubes.
Line voltage = 110 volts. Total "B" voltage on "Q" sets at time of test = 170 volts