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X66

Sensibly equivalent to:
CV1099 CV3828 VR99
    
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The X66 is a selected X65 and also known as CV1099. It is a triode hexode mixer or frequency changer.
The internal coating obscures most of the internal structure.
The control grid is wound on copper supports and connects to the top cap.
The classic envelope is 38 mm in diameter, and excluding the base pins is 99 mm tall.
References: 1043. Type X66 was first introduced in 1940.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
m
h
a
g2,g4
g1(t),g3
a(t)
h
k
g1

 

Absolute Maximum Operating Conditions
Hexode
Vh
Ah
Va
Vs
Vg
mAa
ra
gm
6.3
0.3
250
100
-3
1.75
2.5M
0.225

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
100
4.75
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated May 18, 2014.
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