The CV284 is a voltage stabiliser producing an output voltage of 75 Volts.
The data-sheet describes pin 4 as either connected to the anode or to a priming anode. The latter is provided when the circuit design involves connection the CV284 to a permanent heavy load shunting the stabiliser. In any case pin 4 should be connected to the other anode pins via a 15 kΩ resistor.
The KB/QG identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the QG identifies the maker as English Electric Valve Co., location not known.
The inner coating masks the electrodes to prevent light activation any current.
The EE logo but the only location is England. The cathode is a half cylinder with a rod anode at the centre. Pins 4 to 7 are all connected to the anode. There is no priming anode in this exhibit.
The thin glass tube envelope is 18 mm in diameter, and excluding the B7G base pins is 46 mm tall.
Reference: Data-sheet. Type CV284 was first introduced in 1954. See also1954 adverts.
