The CV5844 (commercially the SC2/3000) is a corona discharge shunt voltage stabiliser for use at EHT voltages and very small currents. The above advert gives the operating details for the range.
Construction is of an outer cylinder with an inner central wire. The gas filling is hydrogen. This device operates at 3,000 Volts and a current of 1 mA nominal and 1.7 mA max.
The use for such shunt stabilisers is for EHT supplies for devices such as CRT's, Geiger-Muller tubes and photomultipliers.
The KB/Z identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the Z identifies the maker as MO Valve Company, Hammersmith.
The GEC logo indicates an M-OV product for the professional market.
The cathode connection to pins 1 and 6. Note the ceramic insulators - for EHT voltages.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 71 mm tall.
