The CV4030 (commercially the G75/3G) is a gas filled voltage stabiliser with a working voltage of 75 Volts. It is fitted with flying leads for wiring permanently into a circuit.
The base with foam protection ring. Location pip on the right of the skirt and spigot with locking depression .
The STC logo and commercial Type designation.
The wide glass tube envelope is 28 mm in diameter, and excluding the base wires is 65 mm tall.
Reference: Data-sheet. Type CV4030 was first introduced in 1958. See also1958 adverts.
