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The CV1076 is the UK procurement code for the commercial DA41. Our other CV1076 has a carbon anode but this has a metal anode.

It is a magnificent audio triode that was designed so that in class B a pair would deliver 175 Watts at 5% distortion. The anode dissipation is 40 Watts.

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 reverse shows that this is a production DA41.

The side view showing the ceramic insulators and mica disc at the top.

The lower ceramic insulator, metal anode and grid winding.

The classic envelope is 51 mm in diameter and, excluding the UX4 base pins, is 137 mm tall.

References: Data-sheet, ¹⁰⁴⁰ & ¹⁰⁴³. Type CV1076 was first introduced in 1939. See also 1939 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.