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VT31

Sensibly equivalent to:
ATS250 CV1031 CV1357 SG250
    
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The VT31 RAF Valve Transmittingm is a directly heated tetrode the commercial type is ESG250. The picture shows that the screen grid helix extends well beyond the cylindrical anode. The control grid can be seen in the picture within the g2 helix. The anode is is not painted black or finned for heat transfer and the anode dissipation is 250 Watts.
See also VT31 and for more details see CV1031.
The balloon envelope is 152 mm in diameter and is 368 mm tall.
References: Data-sheet & 3002.

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
ra
μ
11.0
4.0
2,000
500
62,000
125
PDF scanned from an original document held by the museum
Updated September 10, 2020.
shape:balloon construction:pinch type:tetrode age:1930.1940 base: pin:
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