This 5642 was made in Holland and is an instrument EHT rectifier. The 5642 is a special quality product introduced in 1953.The spiral coated filament passes centrally within the bright Nickel tube anode. The maximum PIV is 10,000 Volts and the rectified current is 250 μA.![](../pics/aai0185a.jpg)
The second picture shows the relation between the filament and the anode.The thin glass tube envelope is 9 mm in diameter, and excluding the flying leads is 50 mm tall.Reference: Data-sheet. Type 5642 was first introduced in 1953. See also 1953 adverts. |
Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | mAa | ![](../static/pdflogo.gif)
| 1.25 | 0.2 | 3,600 | 0.25 |
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Updated February 21, 2013.
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