6BQ5 @ The Valve Museum

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6BQ5

Sensibly equivalent^¶ to:

6P15 CV2975 EL84 N709

See also:

A Small High Quality Amplifier

Extras ▼

Cossor The Hampshire Collection Other 6BQ5 exhibits

The 6BQ5 is another designation for the Mullard designed output pentode EL84.

The discolouration inside the glass speaks of a hard service life.

The stitched anode and within are the three wire grids.

The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 70 mm tall.

References: Data-sheet, ³⁰⁰² & ¹⁰⁴⁰. Type 6BQ5 was first introduced in 1953. See also 1953 adverts.

Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	ic	g1	k,g3	h	h	ic	a	ic	g2

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm	Pout	Pdiss
	6.3	0.76	250	250	-7.3	48	5.5	6.7	2.2	12W

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated October 07, 2025.

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