6/30L2 @ The Valve Museum

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6/30L2

Sensibly equivalent^¶ to:

6GA8 B729 ECC804

See also:

Valves and their Habits - Locked-Seam Cathodes

Extras ▼

Zaerix The Hampshire Collection Other 6/30L2 exhibits

The reseller Zaerix has both the Mazda 6/30L2 Type designation and the Mullard ECC804 on the envelope.

The design is a general purpose double triode with a screen between the sections. The main application is in television receivers.

The ECC804 Type designation.

Both triodes have stitched anodes and copper grid supports. The heater wire has been coiled prior to applying the insulation.

The triodes are side by side with the screen shaped for maximum isolation.

The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 48 mm tall.

References: Data-sheet & ¹⁰⁴⁰ Type 6/30L2 was first introduced in 1958. See also 1958 adverts.

Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	a(2)	g1(2)	k(2)	h	h	a(1)	g1(1)	k(1)	s

Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.3	200	-7.7	10.0	5.3k	3.4

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated March 10, 2026.

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