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CV2174

Sensibly equivalent to:
1267 G240/2D
    
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The CV2174 is the UK Government procurement designation for the STC G240/2D cold cathode Thyratron. The main anode electrode can be seen shielded in a glass rod. The cathode is the domed electrode above the pinch and coaxially within the cathode is a smaller annular electrode just outside the glass shielding rod. This is the trigger and only a small gap exists between it and the cathode. When conducting the voltage drop across the valve is 90 Volts. The discharge is initiated by a voltage on the trigger electrode.
The wide glass tube envelope is 27 mm in diameter, and excluding the IO base pins, is 73 mm tall.
Reference: Datasheet. Type CV2174 was first introduced in 1958.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
Base Shell
-
a
-
tr
ic
ic
k

 

Absolute Maximum Operating Conditions
Thyratron
Va
mAa
240
50
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 12, 2013.
shape:wide.glass.tube construction:pinch type:thyratron age:1950.1960 base:io pins:8 pin:1.base shell pin:2.- pin:3.a pin:4.- pin:5.tr pin:6.ic pin:7.ic pin:8.k
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