6BE6 @ The Valve Museum

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6BE6

Sensibly equivalent^¶ to:

5750 CV453 EK90 HM04 X727 X77

See also:

Pentagrid Converters - CV453 short entry

Extras ▼

Pinnacle Valves Donated by Bob Hayter (G4OAC) Other 6BE6 exhibits

The 6BE6 is a heptode or pentagrid valve and this exhibit is an import to the UK.

The heptode is classically used as a frequency changer in a superhet receiver. Radio and Television both use the superhet principle. To change frequency the incoming signal is mixed with a local oscillator. The electron stream is effectively switched on and off by the oscillator. In practice the process is one of producing sum and difference frequencies rather than just mixing of two signals.

To prevent the oscillator and the signal interfering in unplanned ways a screening grid keeps the circuits apart.

The notch in the side of the anode reveals the wire grids with the outer suppressor grid being clearly seen.

The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 48 mm tall.

References: Data-sheet & ¹⁰⁴⁰. Type 6BE6 was first introduced in 1950. See also 1950 adverts.

Pin Connections

B7G	1	2	3	4	5	6	7
	g1	k	h	h	a	g2,g4	g3

Absolute Maximum Operating Conditions^¶

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Vosc
	6.3	0.3	250	100	-1.5	3	7.1	1M	0.475	10

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated December14, 2015.

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