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K50NSensibly equivalent¶ to:
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The K50N is a Mullard PM12M suppleid to Ever Ready. It is an variable μ RF tetrode known at the time as a screened grid valve because the screen grid took the form of an enclosing cage.![](../pics/abo0079a.jpg)
The reverse is plain metalising paint.The balloon envelope is 42 mm in diameter, and excluding the B4 base pins is 106 mm tall.References: Data-sheet & 1043 Type K50N was first introduced in 1937. See also 1937 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | tc | ![](../static/key.gif) g2 | g1 | f | f | a |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | ![](../static/pdflogo.gif)
| 2.0 | 0.3 | 150 | 90 | -0/7 | 2.5 | 0.5 | 0.23M | 1.4 |
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Thanks to Andy Cowley for supplying the above PDF datasheet. |
Updated November 27, 2014.
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