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CV818Sensibly equivalent¶ to:
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The CV818 is a miniature dry battery output pentode. The commercial N18 is identical and both Types appear on the glass.The CV818 was specified for portable radio receiver use. The output of 270 mW maximum would only drive a small efficient loudspeaker, not hi-fi.The KB/Z identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the Z identifies the maker as MO Valve Company, Hammersmith.
The commercial N18 designation. Two tensioning springs can be seen at the top with two filament strands passing through the grids. The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.References: Data-sheet, 3002 & 1040. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |  f- | a | g1 | g2 | fct,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 | 90 | -4.5 | 9.5 | 2.1 | 100,000 | 2.15 | 0.27 | 7% |
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Updated October 25, 2024.
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