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X31Sensibly equivalent¶ to:CV3821See also:
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This X31 is a metallised triode hexode frequency changer. The X31 was designed with a heater for universal mains (AC/DC sets) whereas the X41 was the same valve but designed for AC mains receivers.The X31 designation was later re-used for a miniature valve. in this exhibit the printing has all but been lost from the metallising and it was difficult to identify it without strong light and a glass.The classic envelope is 42 mm in diameter and, excluding the B7 base pins, is 117 mm tall.References: Data-sheet & 1043. Type X31 was first introduced in 1935. See also 1935 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | tc | a(t) | g1(t),g3 | g2,g4 | h | h | m,k | a | g1 |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | gm |
| 13.0 | 0.3 | 250 | 80 | -1.5 | 0.55 |
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Absolute Maximum Operating Conditions¶
| Va |
| 150 |
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Updated August 29, 2018.
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