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3B24Sensibly equivalent¶ to:732A CV709 CV812
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The 3B24 is a high voltage half wave rectifier.Scott Johnson identified this valve that we previously could only see as a 3B2. He writes: it is a common HT rectifier used in Radar sets in the 1940s and 1950s. We also have the variant 3B24W and 3B24WA.![](../pics/aaa0029a.jpg)
The cylindrical anode is taken to the top cap. The helical filament is visible in the picture and the top connection to the filament is via a central support rod. A third element is visible with a short stub of wire. It is not possible to identify if this third mounting rod housed a second filament or a control grid. The filament continuity is good.The wide glass tube envelope is 38 mm in diameter and, excluding the base pins, is 101 mm tall.References: Data-sheet & Scott Johnson. |
Pin Connections
| 1 | 2 | 3 | 4 | tc | ![](../static/key.gif) f(tap) | f | nc | f | a |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | mAa | ![](../static/pdflogo.gif)
| 5.0 | 3.0 | 60 |
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Updated January 04, 2022.
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