The 6V6 family of beam tetrodes came in many constructions and were very popular as the final audio stage of broadcast receivers. The original 6V6 was an American metal can valve from the mid 1930s. Brimar introduced this glass tubular Type in 1938.

We have another example of the Brimar 6V6GT from when manufacture was sent abroad.

The valves were capable of push pull use but the normal environment was as a single end output stage.

The wide glass tube envelope is 28  mm in diameter and, excluding the IO base pins, is 70 mm tall.

References: Datasheet, ¹⁰⁴⁰ & ¹⁰⁴³. Type 6V6GT was first introduced^¶ in 1937.

 
Pin Connections

IO	1	2	3	4	5	6	7	8
	m	h	a	g2	g1	nc	h	k

 
Absolute Maximum Operating Conditions^¶

Beam Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	6.3	0.45	315	225	-13	34	2.2	77K	3.75	5.5W	12%

Thanks to Frank Philipse for supplying the above PDF datasheet

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