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CV249Sensibly equivalent¶ to:
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The CV249 (commercially the 3A/107A) is a telephone repeater triode released in 1947 as a replacement valve for use in older equipment. It was not intended for use in new equipment.For more images See 3A/107A.
Side view of the box anode and locating pip for the insertion into the bayonet base.The classic envelope is 44 mm in diameter, and excluding the UX4 base pins is 100 mm tall.Reference: Data-sheet. Type CV249 was first introduced in 1947. See also 1947 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 |  a | g1 | f | f |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vg | mAa | ra | gm | μ | 
| 4.0 | 0.25 | 190 | -8.0 | - | 5,500 | | 7 |
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Updated January 05, 2026.
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