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63SPTSensibly equivalent¶ to:See also:
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The 63SPT was A C Cossor's type designation number for the EF50s that it made and this example is a UK product and features black paint on the aluminium can.We also have a 63SPT made in the US for Cossor.The valve was so important during WWII that several manufacturers were involved although the design was a breakthrough for Philips in The Netherlands.
The plain aluminium screening can.The wide metal tube envelope is 34 mm in diameter and, excluding the B9A base pins, is 59 mm tall.References: Data-sheet & 1043. Type 63SPT was first introduced in 1938. See also 1938 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |  h | g2 | a | g3 | s | k | g1 | s | h |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | 
| 6.3 | 0.3 | 250 | 250 | -2 | 10 | 3 | 1.0M | 6.5 |
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Updated September 28, 2018.
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