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X24

Sensibly equivalent to:
220TH CV1082 CV3819
    
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The X24, is a triode heptode mixer / local oscillator for use as a frequency changer in superhet receivers.
The reverse carries the Marconi name and the metalising connection.
The thin glass tube envelope is 42 mm in diameter, and excluding the B7 base pins is 104 mm tall.
Reference: Datasheet. Type X24 was first introduced in 1939.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
a(t)
g1(t)
g2
f
f
m
a
g1

 

Absolute Maximum Operating Conditions
Heptode
Vh
Ah
Va
Vs
Vg
mAs
mAa
gm
2.0
0.2
150
60
-1.5
1.7
0.7
0.25

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
100
2.1
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated August 24, 2018.
shape:classic construction:pinch type:triode.heptode age:1930.1940 base:b7 heater:2.0v pins:7 pin:1.a(t) pin:2.g1(t) pin:3.g2 pin:4.f pin:5.f pin:6.m pin:7.a pin:tc.g1
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