The 6SJ7 is a high gain screened pentode and dates from the mid 1930s. It is a sharp cut-off type and is specified for RF or AF use.

The thin metal tube envelope is 25 mm in diameter and excluding the IO base pins, is 50 mm tall.

 
Pin Connections

IO	1	2	3	4	5	6	7	8
	m	h	g3	g1	k	g2	h	a

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	100	-3	3	0.8	1M	1.65

Thanks to Frank Philipse for supplying the above datasheet

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This exhibit was last updated on 18 December 2008 {find valves by name}