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EF6

Sensibly equivalent to:
MEF6 TEF6 VEF6
    
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The EF6 pentode was designed for radio receivers, where it would be used for RF and IF amplification. The later EF8 was a variable μ type for automatic gain control in IF stages.
The classic envelope is 29 mm in diameter and, excluding the Ct8 base pins, is 81 mm tall.
References: Datasheet & 1043. Type EF6 was first introduced in 1938.

 

Pin Connections
Ct8
1
2
3
4
5
6
7
8
tc
h
m
a
g2
-
g3
k
h
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.2
250
100
-2
3
1
1.75M
2.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 22, 2013.
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