Antique radios, Old Time Radios
QP240
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Country:
Europe
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Brand:
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| Tube type: |
Double Pentode Power/Output |
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| Identical to |
QP240
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| First year |
Sep.1934
Wireless World (The), London (WW, 79)
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| First Source
(s) |
22.Nov.1935 : Wireless World (The), London (WW, 79)
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| Base |
B9 British 9-Pin (Codex=Yx)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.4 Ampere / Direct / Battery = |
| Description |
Hivac and Mazda are known manufacturers.
Va=Vg2 <150; gm=4mA/V @ Ia=Vg2=100, Vg1=0.
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| Information source |
History of the British Radio Valve to 1940 p. 146 & 188
- - Manufacturers Literature
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Babani, International Radio Tube Encyclopaedia
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QP240: own collection
Peter den Boer
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Just Qvigstad
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QP240: own collection
Peter den Boer
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):10
Collection of
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