VR91 @ The Valve Museum

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VR91

Sensibly equivalent^¶ to:

ARP35 CV1091 EF50

See also:

The Famous EF50 of WWII

Extras ▼

Rogers G8LSD Valve Collection Other VR91 exhibits

The WWII EF50 in a plain aluminium screening can and carrying the UK Air Ministry branding. The VR91 is Valve Receiving number 91.

This amplifier pentode was a general workhorse. It was extensively used in radio and radar during WWII.

The pins are equi-spaced around the circumference of the pin circle.

This example was made in Canada by Rogers.

The dimensions are 32 mm in diameter for the body of the screening can, and 60 mm in length, excluding the short B9G pins and the central spigot that locates the pins and covers the evacuation seal.

References: ¹⁰⁴⁰. Type VR91 was first introduced in 1938.

Pin Connections

B9G	1	2	3	4	5	6	7	8	9
	h	g2	a	g3	s	k	g1	s	h

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	250	-2	10	3	1.0M	6.5

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated December03, 2012.

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