Antique radios, Old Time Radios
S12
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Country:
Great Britain (UK)
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| Identical to |
S12
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| First Source
(s) |
Aug.1938 : Wireless World (The), London (WW, 79)
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| Base |
SPECIAL TUBEBASE in general (Codex=sp)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.05 Ampere / Direct / Battery = |
| Description |
Miniature tube first made in 1938. For use in hearing aids and small portable radios.
Osram data gives If=60mA. Midget 4 pin base. Va<100, Vs<30. Gm=0.7mA/V at the maximum HT values with Ia=2.5mA, Is=0.4mA at -Vg=0.
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Dimensions (WHD)
incl. pins / tip |
x x 18 mm / x x 0.71 inch |
| Information source |
The Saga of Marconi Osram Valve p. 249, 250 & 338
History of the British Radio Valve to 1940 p. 140 & 205
- - Manufacturers Literature
Taschenbuch zum Röhren-Codex 1948/49
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S12: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20
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S12: MARCONI RECEIVING VALVES, LONDON, 1938
Jose Casas-Avalos
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| Data Compliance |
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