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The CV753 is a miniature diode on a B7G base and features a 1.4 Volt indirectly heated cathode. The prototype was the 1A3 and both Type designations appear on the glass.

The diode: the insulated heater is a single vertical strand within the cathode cylinder. The anode has side fins to anchor the anode and to provide heat dissipation. The working area is small.

The KB/D identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the D identifies the maker as Mullard Radio Valve Co., Mitcham.

The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.

Reference: Data-sheet. Type CV753 was first introduced in 1943. See also 1943 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.