W727 @ The Valve Museum

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W727

Sensibly equivalent^¶ to:

6BA6 CV454 EF93

See also:

Osram Valves and GEC Tubes Advert

Extras ▼

GEC Valves Donated by Bob Hayter (G4OAC)

The W727 is a variable μ pentode for use at HF. Most often as an IF amplifier in superhet receivers. This GEC exhibit is also marked with the alternative Type designation of 6BA6. The 1954 data-sheet states that the W727 is the commercial equivalent of CV454.

The GEC label.

The thin glass tube envelope is 18 mm in diameter and excluding the B7G base pins, is 47 mm long.

References: Data-sheet & ¹⁰⁴⁰. Type W727 was first introduced in 1954. See also 1954 adverts.

Pin Connections

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

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	gm
	6.3	0.3	250	100	-1	11	4.4

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated September 06, 2019.

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