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VT-31

Sensibly equivalent to:
31 CV1031 ESG250 SG250 VT31
    
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This valve is labelled VT-31 as an American service code. The commercial Type is 31. Our guess is mid 1930s for its design date. The output is probably in the low HF region.
See also VT-31 and CV1031 for details.
The balloon envelope is 152 mm in diameter and is 381 mm tall.
References: 3002 & Wireless World.

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
11.25
8.0
5,000
Updated January 25, 2013.
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