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The CV4028 gas discharge voltage stabiliser is the UK Government procurement specification version of the commercial 0B2WA B7G voltage stabiliser.

The regulation of this tube was 3 Volts for currents of between 5 and 30 mA. The CV4028/0B2WA is a special quality version of the commercial 0B2 and the regulation is tighter at 3 volts. The CV1833 is the CV version of the 0B2.

The striking voltage for the 0B2WA is 133 Volts.

The outer cathode cylinder with a central anode rod.

The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 45 mm tall.

Reference: Data-sheet. Type CV4028 was first introduced in 1955. See also 1955 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.