The CV188 voltage stabiliser was designed for accurate regulation. It has a B4 base but the envelope is small and compact. The striking voltage is 140, and once ionisation has occurred the tube can regulate the 100 Volt output to 2 Volts for currents of between 1 and 8 mA. This high stability low current device would be useful for stabilising supplies to oscillators or as a reference voltage in valve voltage stabilisers.
The EEVC logo of the English Electric Valve Company.
The dome with central electrode fixed to the top mica. The CV specification demands that the neon discharge be visible from through the dome so that the CV188 can act as an indicator as well as a voltage stabiliser.
The pinch end with the central electrode passing through the lower mica disc.
The plain card box has a paper label on one side and an identifying paper strip sealing the top of the carton.
The wide glass tube envelope is 29 mm in diameter and, excluding the B4 base pins, is 68 mm tall.