12CA5 @ The Valve Museum

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12CA5

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RCA G8LSD Valve Collection

RCA describe the 12CA5 as being designed for operation on a series heater string. The warm-up time for this AF output pentode is given as 11 seconds.The 6AC5 is electrically identical but has a 6.3 Volt heater.

The thin glass tube envelope is 17 mm in diameter, and excluding the B7G base pins is 58 mm tall.

References: Data-sheetn & ³⁰⁰². Type 12CA5 was first introduced in 1955. See also 1955 adverts.

Pin Connections

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

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pdiss	Pout	D
	12.6	0.6	130	130	-1	32.0	-	16,000	8.1	5W	1.1W	5%

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated February 07, 2013.

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