The MVSG from Cossor has a mirror finish inside the envelope from the magnesium gettering. Externally the envelope is covered with a metallic paint to add to overall screening.Introduced in 1932, Cossor in 1935 describe the MVSG as a special variable-mu screened grid valve. The special feature being the control of volume by altering the grid bias. It is clear that variable-mu technology was still relatively novel.The balloon envelope is 42 mm in diameter and, excluding the B5 base pins, is 120 mm tall.References: Data-sheet & 1043. Type MVSG was first introduced in 1932. See also 1932 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | tc | g2 | g1 | h | h | k | a |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm |
| 4.0 | 1.0 | 200 | 80 | -1.5 | 7.5 | 0.75 | 0.2M | 2.5 |
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Updated March 20, 2023.
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