VT-112 @ The Valve Museum

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VT-112

Sensibly equivalent^¶ to:

1852 6AC7

See also:

Metal Striptease

Extras ▼

RCA The Signals Museum - RAF Henlow.

The VT-112 (commercially the 6AC7) pentode was designed for high gain amplification. It has a sharp cut-off (unsuitable for domestic radios with AVC) the intended application is as an IF or video amplifier for wide-band receivers, e.g. radars.

The RCA design of metal valves was pinch-less and had very short lead-outs that were well shielded from each other by the metal envelope.

Compared to the EF50, it consumed 50% more heater power but provided 50% more gm as a result.

It was used in enormous numbers in American WWII equipment.

See also 6AJ7 that has identical characteristics.

The RCA Logo.

The thin metal tube envelope is 25 mm in diameter and excluding the IO base pins, is 51 mm tall.

References: Data-sheet & ¹⁰⁴⁰.

Pin Connections

IO	1	2	3	4	5	6	7	8
	m	h	g3	g1	k	g2	7	a

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	rk	ra	gm
	6.3	0.45	300	150	-2	10	2.5	160	1M	9

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated September 05, 2024.

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