1AB6 @ The Valve Museum

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1AB6

Sensibly equivalent^¶ to:

1C3 DK96 DK98 X25

See also:

Pentagrid Converters

Extras ▼

Tungsram G8LSD Valve Collection

The 1AB6 is a heptode mixer for battery superhet receivers.

It is believed that Tungsram of Hungary had connections with the Philips organization. Mullard was a wholly owned Philips company and so it is possible that this valve was actually made at one of the Mullard factories. The 1AB6 is identical to the DK96.

The final series of battery valves were the ones that had the 25 mA oxide coated tungsten filaments.

The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 46 mm tall.

References: Data-sheet & ¹⁰⁴⁰. Type 1AB6 was first introduced in 1955. See also 1955 adverts.

Pin Connections

B7G	1	2	3	4	5	6	7
	f-	a	g2	g1	g4	g3	f+,g5

Absolute Maximum Operating Conditions^¶

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	1.4	0.025	85	68	0	0.6	0.14	0.8M	0.3

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated April 12, 2013.

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