A1834 @ The Valve Museum

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A1834

Sensibly equivalent^¶ to:

6AS7G CV2523

See also:

GEC Series Stabiliser Valves Advert

Extras ▼

Marconi The Hampshire Collection

The A1834 is the M-OV Type designation for the 6AS7G series stabiliser double triode.

The AC anode resistance is very low at 280 Ω and the mutual conductance is considerable at 7.5 mA/V.

The above advert dates to 1958. The 6AS7G probably dates to 1950.

Each anode is a pair of finned flat based U channels either side of the cathode assembly.

The MWT brand sticker on this M-OV valve.

A closer view of one triode showing the anode at either side of the cathode and grid. The wire at the top joins the two anode halves.

Here the control grids can be seen to be wider than the anode channels.

The classic envelope is 50 mm in diameter and, excluding the IO base pins, is 108 mm tall.

References: Data-sheet & ⁴⁰⁴⁰.

Pin Connections

IO	1	2	3	4	5	6	7
	g1(2)	a(2)	k(2)	g1(1)	a(1)	k(1)	h

Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	2.5	135	-31.5	125	280	7.5

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated March 23, 2024.

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