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CV858

Sensibly equivalent to:
6J6 CV4031 ECC91
    
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The CV858 is the UK service designation for the 6J6. This miniature double triode was used for VHF signal amplification.
The construction has a common flattened tube cathode, with the control grids either side. The anodes are U channel sections either side of the central cathode. At first sight the valve appears to be a single device.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins is 46 mm tall.
References: Datasheet & 1040. Type CV858 was first introduced in 1956.

 

Pin Connections
B7G
1
2
3
4
5
6
7
a(2)
a(1)
h
h
g(1)
g(2)
k

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.45
100
-0.85
8.5
7100
5.3
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 08, 2013.
shape:thin.glass.tube construction:all.glass type:double.triode age:1950.1960 base:b7g heater:6.3v pins:7 pin:1.a(2) pin:2.a(1) pin:3.h pin:4.h pin:5.g(1) pin:6.g(2) pin:7.k
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