A, variable output, 300 dc maximum, high-voltage power supply built for charging electroscopes. Output is via a 4-pin connector on the front panel. No circuit diagram is available but it is believed, based on the electroscope designs, that two of the output pins also served to provide low-voltage power to the light bulbs used to illuminate the quartz fibers in the electroscope. The supply stands 18 cm tall and was built by the “Canadian Signals Research & Development Est.” in March 1947. It is assumed they were contracted by NRC, who made the electroscopes. This unit, a TYPE 44-i-D, bears the Serial number of 6.
