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CMG25

Sensibly equivalent to:
CV242 CV1472 GS18
    
Extras ▼

 

The CMG25 is a gas filled photocell. The commercial Type CMG25 is identical to the CV specification and both designations appear on the glass.
The photo cathode is caesium on silver and the tested working voltage is 95 Volts.
The anode is a wire ring.
The anode with the photo-cathode behind.
The photo-cathode is deposited on a thin sheet that is bent at 90 degrees. The cathode support does not pass along the whole length of the cathode.
Thanks to Rod Hawkins
The wide glass tube envelope is 25 mm in diameter and, excluding the B4 base pins, is 77 mm tall.
Reference: Data-sheet. Type CMG25 was first introduced in 1952.

 

Pin Connections
B4
1
2
3
4
a
k
-
-

 

Absolute Maximum Operating Conditions
Light Control
Va
80-110
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated May 12, 2021.
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