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AF3

Sensibly equivalent to:
CV2833
    
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The AF3 is a variable-mu RF pentode. Operation under AGC control would have been in RF or IF amplifier service in superhet receivers.
This AF3 from Valvo has a bright external gold metallic paint finish. The Ct8 base was much more popular in continental Europe than in the UK. The colour and the base suggest a 1930s design.
The classic envelope is 41 mm in diameter and, excluding the Ct8 base pins, is 103 mm tall.
References: Datasheet.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
4.0
0.65
250
100
-3
8.0
2.6
1.2M
1.8
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December31, 2012.
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