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CV807Sensibly equivalent¶ to:3A4 CV2390 DL93 E1485
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The CV807 miniature output pentode is specified for both audio and transmitter use. The CV807 is the same as the commercial 3A4 and the envelope has both Type designations. For a small dry battery valve 1.2 Watts output in the HF range would be quite an achievement. Clandestine radio springs to mind.The KB/D identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the D identifies the maker as Mullard Radio Valve Co., Mitcham.The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 44 mm tall.References: Data-sheet & 1040. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |  f- | a | g2 | g1 | fct | a | f+ |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | Pout | D |
| 1.4 | 0.2 | 150 | 90 | -8.4 | 13.3 | 2.2 | 100,000 | 1.9 | 0.7 | 6% |
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Updated October 25, 2024.
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