Sensibly equivalent¶ to:
6922 CV10320 Cca
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. This frame-grid double triode was not designed for operation such that it would be at cut-off for long periods of time. The Mullard advert in 1957 introducing the E88CC gives the application areas as computing, switching and scaling.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 45 mm tall.
References: Datasheet & 1040. Type E88CC was first introduced in 1958.
Absolute Maximum Operating Conditions¶
Updated October 15, 2016. shape:thin.glass.tube construction:all.glass type:double.triode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.a(2) pin:2.g1(2) pin:3.k(2) pin:4.h pin:5.h pin:6.a(1) pin:7.g1(1) pin:8.k(1) pin:9.s