Radios antiguas y Radios de Colección
WR2
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País:
Gran Bretaña (GB)
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| Idéntica a |
WR2
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| Válvulas similares |
Other characteristic (electr. data):
WR1
Heater different:
W2_Cossor
Otra base:
WR2_UV
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| Primera serie |
May.1925
Saga of the Vacuum Tube, Tyne page 375, 376
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| Fuente principal
(es) |
1925 : British Radio Valves - The Vintage Years: 1904-1925 p.49
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Usada en |
Radio/TV-reception etc. |
| Filamento |
Vf 1.8 Volt / If 0.3 Ampere / Direct / Battery = |
| Descripción |
Corresponds to W2. An 8 ohm series resistor allowed to operate from 4 to 6 volt supply; if shortened by a thumbscrew the tube could be used with 2 volt L.T.
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| Literatura |
Saga of the Vacuum Tube, Tyne 1925 Brown Brothers Catalog 217
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Just Qvigstad
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WR2: Banneitz, TB der drahtl. Teleph. 1927
Anónimo 15 Coleccionista
Mas ...
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