Generation I board:
(Fig 11)
The Generation I board does NOT have the 24V bias point for the 100K resistor. In these amplifiers the 100K 2-
watt resistor goes from anyplace on the filament system to chassis ground.
Gen II board:
Look for the small capacitor near dual relays (Fig. 12) and remove it, if installed. The string of 6 large forward
connected rectifier diodes add about 4 volts of bias.
