1S4 @ The Valve Museum

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1S4

Sensibly equivalent^¶ to:

CV783 DL91

See also:

Brimar 1R5, 1S4, 1S5, 3S4, 1T4 & 3V4 Advert - CV783 short entry

Extras ▼

Unknown G8LSD Valve Collection

The 1S4 is a dry battery audio output valve that is identical to the CV783.

The thin glass tube envelope is 17 mm in diameter, and excluding the base pins is 45 mm tall.

References: Data-sheet, ³⁰⁰² & ¹⁰⁴³. Type 1S4 was first introduced in 1940. See also 1940 adverts.

Pin Connections

B7G	1	2	3	4	5	6	7
	f-	a	g1	g2	f-	a	f+

Absolute Maximum Operating Conditions^¶

Beam Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	rl	Pout	D
	1.4	0.1	90	67.5	-7.0	7.4	1.4	0.1M	1.575	8,000	0.27W	12%

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated April 06, 2015.

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