Mullard describe the EF94 as an RF pentode, suggesting use up to 50 MHz.

The thin glass tube envelope is 17 mm in diameter and excluding the B7G base pins, is 47 mm tall.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.3	250	150	-1	10.6	4.3	1.0M	5.2

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 11 July 2007 {find valves by name}