The E90CC is a special quality double triode from Mullard. This valve is interesting from the fact that no attempt has been made to separate the two sections on the base pin out. This suggests a low frequency application possibly for multivibrator service in computer circuits. Sadly we have not found any evidence as to the design use as yet. Mullard just refer to it as an industrial double triode.

The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 60 mm tall.

 
Pin Connections

B7G	1	2	3	4	5	6	7
	a(2)	a(1)	h	h	g1(1)	g1(2)	k

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.4	100	-2.1	8.5	4,500	6.0

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 10 June 2007 {find valves by name}