CV850 @ The Valve Museum

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CV850

Sensibly equivalent^¶ to:

5654 6AK5 731A CV4010 EF95

Extras ▼

Philips The Hampshire Collection Other CV850 exhibits

The CV850 is a low noise RF voltage amplifying pentode, designed to operate at VHF.

The KB/DQ identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the DQ identifies the maker as Philips SpA, Milan, Italy.

See also 6AK5 the prototype for more details.

The thin glass tube envelope is 17 mm in diameter and excluding the B7G base pins measures 36 mm tall.

References: Data-sheet & ¹⁰⁴⁰. Type CV850 was first introduced in 1952. See also 1952 adverts.

Pin Connections

B7G	1	2	3	4	5	6	7
	g1	k	h	h	a	g2	k

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.175	180	120	-2	7.2	2.4	0.7M	5.1

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated October 27, 2025.

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