The 6SN7W is an American glass tubular version of the mid 1930s metal double triode valve.

The W designation is probably a special quality version of the GT variant.

The construction uses a glass pinch and although two separate electrode structures are visible through the envelope, the cathodes are internally joined together.

Designed for audio applications the shared cathode would make phase splitters a natural choice of application.

The wide glass tube envelope is 28 mm in diameter and excluding the IO base pin length, stands 68 mm high.

 
Pin Connections

IO	1	2	3	4	5	6	7	8
	nc	h	a(2)	g(2)	g	a	h	k

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.8	250	-0	3	7.7k	1.6

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 04 July 2007 {find valves by name}