3S4 @ The Valve Museum

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3S4

Sensibly equivalent^¶ to:

1P10 CV484 CV820 DL92 N17

See also:

CV484 short entry - The 'Rambler' Portable Superhet

Extras ▼

Tungsram G8LSD Valve Collection Other 3S4 exhibits

The 3S4 is an audio output pentode valve designed for battery portable broadcast radio receivers. The output power is very small so either a high efficiency loud speaker would be used or headphones. The design dates to the late 1940's.

The thin glass tube envelope is 18 mm in diameter and excluding the B7G base pins it is 43 mm tall.

References: Data-sheet, ¹⁰⁴⁰ & ¹⁰⁴³. Type 3S4 was first introduced in 1941. See also 1941 adverts.

Pin Connections

B7G	1	2	3	4	5	6	7
	f	a	g1	g2	hct,g3	a	f+

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	1.4	0.1	90	67.5	-7	7.4	1.4	0.1M	1.58	0.27	12%

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated March 12, 2022.

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