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CV1578

Sensibly equivalent to:
CV1091 EF50
    
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The CV1578 is an HF pentode and the prototype was the EF50 from Mullard. The old RAF service code is VR91A. The EF50 was designed for working at around 45 MHz and the CV1578 requires a maximum operating frequency of 125 MHz.
Reference: Datasheet.

 

Pin Connections
B9G
1
2
3
4
5
6
7
8
9
h
g2
a
g3
s
k
g1
s
h

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.3
300
300
-2
10
3
1.0M
6.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 24, 2017.
shape:wide.glass.tube construction:all.glass type:pentode age:1930.1940 base:b9g heater:6.3v pins:9 pin:1.h pin:2.g2 pin:3.a pin:4.g3 pin:5.s pin:6.k pin:7.g1 pin:8.s pin:9.h
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