12A6 @ The Valve Museum

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12A6

Sensibly equivalent^¶ to:

12A6Y CV525 VT-134

Extras ▼

Ferranti Valves from Mark Cunliffe Other 12A6 exhibits

The 12A6 was designed for use as a single end audio output stage for radio receivers. The Ferranti details give a cathode resistor of 375 Ω and a load resistance of 7,500 Ω. The original design was American.

The reverse of the envelope is plain.

The thin metal tube envelope is 25 mm in diameter and, excluding the IO base pins, is 67 mm tall.

References: Data-sheet, Data & ¹⁰⁴⁰ Type 12A6 was first introduced in 1942. See also 1942 adverts.

Pin Connections

IO	1	2	3	4	5	6	7	8
	m	h	a	g2	g1	nc	h	k

Absolute Maximum Operating Conditions^¶

Beam Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout
	12.6	0.15	250	250	-12.5	30	3.5	70k	3.0	2.4

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated January 20, 2023.

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