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VT31Sensibly equivalent¶ to:ATS250 CV1031 SG250
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This valve is labelled VT-31 as an American service code but was made as a UK VT31. The Mullard commercial equivalent is the SG250.The American VT-31 (commercial Type 31) is a triode on a UX4 base - quite different.Our guess is mid 1930s for its design date. The output is probably in the low HF region. See also VT31 and CV1031 for details.The American VT-31 (commercial Type 31) is a triode on a UX4 base - quite different.The balloon envelope is 152 mm in diameter and is 381 mm tall.References: Data-sheet, 4043 & Wireless World. |
Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | 
| 11.25 | 8.0 | 5,000 |
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PDF scanned from an original document held by the museum |
Updated September 10, 2020.
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