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The CV449 is a small, special quality voltage stabiliser. The striking voltage is 115 Volts and the maintaining voltage is 85 Volts. For a tube current variation of 1 mA to 10 mA the voltage regulation is 4 Volts.

This valve would have been used to directly stabilise the voltage for an oscillator or be employed as a voltage reference for a stabilised supply. In the latter case the tube would be operated at constant current.

See Mullard 85A2 for the commercial version.

The KB/G identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the G identifies the maker as Ericsson, Beeston.

The construction is conventional with an outer cathode cylinder and a single wire placed centrally as the anode.

The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 44 mm tall.

References: Data-sheet.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.