The 9D6 miniature variable μ pentode was designed to operate at HF. This suggests radio frequency amplifiers as well as intermediate frequency amplifiers.

The thin glass tube envelope is 18 mm in diameter and excluding the B7G base pins, is 43 mm long.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	150	-0.65	8	2	0.5M	2.5

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 05 July 2007 {find valves by name}