Stewart-Warner 301-A circuit diagram

Plate supply plug (#67398) must be connected to some source of filtered D.C. at a potential of 180 to 280 volts. Recommended voltage is 250. The Ground Post of the converter is the negative return and must be connected to the negative side of the external plate supply. The table below gives plate voltages at both tubes for three different plate supply voltages.

Plate Supply Voltage	'24 Plate	'27 Plate
180	26	70
250	34	93
280	37	102