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CV820Sensibly equivalent¶ to:
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The CV820 is a battery output pentode identical to the 3S4 and both Type designations appear on the glass.The KB/D identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the D identifies the maker as Mullard Radio Valve Co., Mitcham.
The anode conceals the inner structure but the twin single strand filaments and their tension springs can be seen at the top.The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 46 mm tall.Reference: Data-sheet. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |  f | a | g1 | g2 | hct,g3 | a | f+ |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | Pout | D | 
| 1.4 | 0.1 | 90 | 67.5 | -7 | 7.4 | 1.4 | 0.1M | 1.58 | 0.27 | 12% |
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Updated October 25, 2024.
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