VMP4G @ The Valve Museum

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VMP4G

Sensibly equivalent^¶ to:

CV1169 CV3785 CV3786 NR45

See also:

CV1169 short entry - VMP4G and W31 Advert

Extras ▼

Osram Valves from Claude Jackson Other VMP4G exhibits

The VMP4G is a screened variable &MU; RF amplifier pentode for use in broadcast superhet receivers.

The VMP4 and VMP4K were introduced in 1933/4. This improved version the VMP4G was introduced in 1935 as a glass enveloped version when the Catkin valves were phased out.

The Osram brand printed on the metal screening paint. The connection to the cathode pin can be seen in the circle above the base.

The classic envelope is 45 mm in diameter, and excluding the B7 base pins is 119 mm tall.

References: Data-sheet & ¹⁰⁴³. Type VMP4G was first introduced in 1935. See also 1935 adverts.

Pin Connections

B7	1	2	3	4	5	6	7	tc
	m	g1	g3	h	h	k	g2	a

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	4.0	1.0	250	100	-2	8.0	5.0	2.7

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated August 26, 2022.

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