The E88CC is a special quality double triode. The transposition of the figures from the end of the type designation to the middle was Mullard's way of denoting a special quality build.

This envelope contains two separate valves with a screen between.

Mullard describe the E88CC as being for use in cascode circuits and as a multivibrator and cathode follower in computers. The special quality in this case referred to its long service life and not, as normal, to its being a ruggised version.

The E88CC and the very similar ECC88 found great use in oscilloscopes of the early 1960s.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 45 mm tall.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	a(2)	g(2)	k(2)	h	h	a(1)	g(1)	k(1)	s

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	gm
	6.3	0.3	90	-1	15	12.5

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 08 June 2007 {find valves by name}