The 6V6 family of beam tetrodes came in many constructions and were very popular as the final audio stage of broadcast receivers. We have an American rugged metal valve produced in the 1930s and several glass versions.

The GTY version looks identical to the GT version and differs in the material used for the base.

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.

 
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