CV131 @ The Valve Museum

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CV131

Sensibly equivalent^¶ to:

9D6 CV4015 EF92 V884 W77

Extras ▼

Brimar Donation from Jeremy Harmer Other CV131 exhibits

The CV131 is a general purpose amplifying pentode. The commercial equivalents are: W77, 9D6 and the EF92. The M8161 is a special quality version.

The W77 identification.

The main Brimar identification and Made in England.

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

References: Data-sheet & ¹⁰⁴⁰.

Pin Connections

B7G	1	2	3	4	5	6	7
	g1	k	h	h	a	g3	g2

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	150	-0.65	8	2	0.5M	2.5

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated May 26, 2025.

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