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The EF95/6AK5 is an amplifier pentode that is physically small and the electrode assembly is no more than a 10 mm cube. The use of this device lay in low noise RF amplification at VHF.

The American Type designation 6AK5 was the industry standard name and here Mullard acknowledge this by the use of both the American and Philips-Mullard European Type designations on the glass.

See also 5654 special quality version of the 6AK5.

Within the box shaped anode can be seen the grid structure. The fine pitch control grid can be seen through the notch at the top of the anode.

The anode is flat in this elevation. The heater is a single wire in a single hairpin shape.

The thin glass tube envelope is 18 mm in diameter and excluding the B7G base pins, is 38 mm tall.

References: Data-sheet & ¹⁰⁴⁰. Type 6AK5 was first introduced in 1942. See also 1942 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.