Antique radios, Old Time Radios
X31
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Country:
Great Britain (UK)
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| Identical to |
X31
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| First Source
(s) |
1935 : History of the British Radio Valve to 1940 p. 148 & 199
22.Nov.1935 : Wireless World (The), London (WW, 79)
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| Base |
British-7-Pin, old (M7A)
Top contact with a cap.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 13 Volts / If 0.3 Ampere / Indirect / Specified current AC/DC ~ = (Series working) |
| Information source |
The Saga of Marconi Osram Valve p. 336
Babani, International Radio Tube Encyclopaedia p. 166 & 167
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
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Just Qvigstad
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X31: My schematic collection.
Pier Antonio Aluffi
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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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