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CV437

Sensibly equivalent to:
KT67 VX3050
    
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The CV437 is a high slope tetrode with a mutual conductance of 13.0 mA/V. The CV specification was issued by the GPO and they were used for telephone repeaters.
The prototype was the KT67. With the KT prefix this was a beam tetrode and the beam plates are visible.
The GEC paper label.
The B9G base.
The wide glass tube envelope is 40 mm in diameter, and excluding the B9G base pins is 81 mm tall.
Reference: Datasheet.

 

Pin Connections
B9G
1
2
3
4
5
6
7
8
9
h
g2
a
-
s
k
g1
s
h

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
6.3
1.27
600
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated May 16, 2019.
type:beam.tetrode age:1950.1960 base:b9g heater:6.3v pins:9 pin:1.h pin:2.g2 pin:3.a pin:4.- pin:5.s pin:6.k pin:7.g1 pin:8.s pin:9.h
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