The VR17 was specified by the Air Ministry for the RAF. It is a directly heated battery triode and came in a Cossor box.The filament rating suggests a thoriated tungsten dull-emitter valve.The gettering completely covers the envelope, however, under strong light the shadow of the anode can be seen. The anode is a vertical rectangular box.![](../pics/acl0342a.jpg)
The Crown and AM of the UK Air Ministry. The wide glass tube envelope is 29 mm in diameter and, excluding the B4 base pins, is 78 mm tall.Reference: 3002. Type VR17 was first introduced in 1925. See also 1925 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | ![](../static/key.gif) a | g1 | f | f |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | ![](../static/key.gif)
| 2.0 | 0.67 |
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Updated May 16, 2021.
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