6Q7G @ The Valve Museum

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6Q7G

Sensibly equivalent^¶ to:

CV587 DH63 NR68 POVT194

See also:

The 'Magic Three' Valves - CV587 short entry

Extras ▼

Unknown Valves from Claude Jackson Other 6Q7G exhibits

The 6Q7G is a double diode triode and was designed for receiver audio use.

The diodes would be for signal and AGC rectification and the triode would act as AGC amplifier or first audio amplifier.

This exhibit is unmarked and identified by comparison with other Double Diode Triodes until a precise match was found.

The shielding box round the diode anodes sits below the triode.

A closer view.

The classic envelope is 38 mm in diameter and, excluding the IO base pins, is 100 mm tall.

References: Data-sheet, ¹⁰⁴⁰ & ¹⁰⁴³. Type 6Q7G was first introduced in 1936. See also 1936 adverts.

Pin Connections

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	a(d2)	a(d1)	nc	h	k	g1

Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.3	250	-3	1	58k	1.2

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated February 17, 2024.

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