Antique radios, Old Time Radios
U18
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Country:
Great Britain (UK)
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| Identical to |
U18
= NU12
= 45IU
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| First Source
(s) |
Sep.1936 : Wireless World (The), London (WW, 79) p273
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Successor Tubes
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U18/20
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 3.75 Ampere / Direct |
| Description |
Manufacturer's data (1938) states heater 3.75A.
Va <500 rms. Ia <250mA mean.
1958 GEC data states Heater current 2.8A approximately.
(Price 1.1EUR in 1938)
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| Information source |
The Saga of Marconi Osram Valve p. 330
- - Manufacturers Literature
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
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U18: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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U18: MARCONI RECEIVING VALVES, LONDON, 1938
Jose Casas-Avalos
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
Collection of
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