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CV21Sensibly equivalent¶ to:
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The CV21 (commercially the VP41) is a variable-mu RF amplifier pentode from Mazda on the MO base that Mazda called the British Octal. Although released in 1938 Mazda were still advertising it in 1948 when the world was moving to smaller all glass valves.
The reverse is plain screening paint.The classic envelope is 32 mm in diameter and, excluding the MO base pins, is 91 mm tall.References: Data-sheet, 1040 & 1043. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | tc |  h | k | a | g2 | g3 | m | nc | h | g1 |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | 
| 4.0 | 0.65 | 250 | 200 | -2.7 | 7.7 | 2.0 | 1.3M | 2.0 |
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Updated May 30, 2025.
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