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CV4014

Sensibly equivalent to:
6064 A3064 M8083
See also:
EF91 - not the valve that won the war - GEC CV4005 U78, CV4014 Z77 & CV4062 N78 Advert
    
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The CV4014 is a UK service designation for the civilian A3064 or M8083 or 6064 (as this valve is also marked), this in turn is a special quality version of the EF91 CV138. The M8083 has a more rugged build than the EF91 and was designed for operation in areas of vibration especially aircraft.
The CV4014 has the distinctive blue band of the Mullard / Philips production. This example has two silvery stripes to prevent release of gas from the glass and matches the M-OV style.
The glass protection hides the inner structure.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 46 mm tall.
References: Data-sheet & 1040. Type CV4014 was first introduced in 1953.

 

Pin Connections
B7G
1
2
3
4
5
6
7
g1
k
h
h
a
g3
g2

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.3
250
250
-2
10
2.5
1M
7.6
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated June 09, 2014.
shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b7g heater:6.3v pins:7 pin:1.g1 pin:2.k pin:3.h pin:4.h pin:5.a pin:6.g3 pin:7.g2
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