This VR150/30 was made by GE Canada. It is a cold cathode voltage regulator and exhibits a near constant voltage drop for currents within the range 5 mA to 40 mA. The voltage is 150 plus or minus 5.5 Volts.
The typical construction of a mica disc closed cathode cylinder with a central rod anode.
The pinch and connections.
The classic envelope is 38 mm in diameter and, excluding the IO base pins, is 86 mm tall.
References: Data-sheet, 1040 & 3002. Type VR150/30 was first introduced in 1939. See also1939 adverts.
