Characteristics of certain voltage-regulator tubes

A quantitative presentation is made of the data from a large number of tests on three types of gaseous voltage-regulator tubes, VR75, VR105, and VR150, from several manufacturers. The effect of several factors, such as time and temperature, on the voltage stability has been investigated, and an equivalent circuit of the tube was experimentally determined. These results are especially applicable where the VR tubes are used as a source of reference voltage, such as in a degenerative electronic voltage stabilizer.