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A2293

Sensibly equivalent to:
CV4079
See also:
GEC A2293 Advert - Mufax Chart Recorder Maintenance Manual - GEC Series Stabiliser Valves Advert - Small Power Valves
    
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The A2293 triode When fitted with flying leads is called the CV4038.
It is a low impedance triode with an anode dissipation of 15 Watts designed as a series pass element in stabilised power supplies.
The anode with central flange to add additional heat radiating capacity. 15 Watts is a significant dissipation for a small B9A based valve.
The GEC paper brand label.
Few details are obvious when looking through the glass but the copper grid support can be seen.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 62 mm tall.
Reference: Datasheet.

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.95
300
-
120
375
12.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 06, 2019.
shape:thin.glass.tube construction:all.glass type:triode age:1950.1960 base:b9a heater:6.3v pins:9 pin:
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