Radios antiguas y Radios de Colección
WR21
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País:
Estados Unidos
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| Idéntica a |
WR21
= WR21A
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| Válvulas similares |
Other characteristic (electr. data):
WR21D
Differences not known by us:
WR11
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| Primera serie |
Feb.1922
Radio Manufacturers of the 1920's, Vol. 3 page 9
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| Fuente principal
(es) |
1920 : Antique Radio Classified L.A.Peckham, 1991
1922 : Saga of the Vacuum Tube, Tyne page 310+312
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| Fin producción |
Sep.1922 |
| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Usada en |
Radio/TV-reception etc. |
| Filamento |
Vf 4 Volt / If 0.8 Ampere / Direct / Battery = |
| Descripción |
Aeriotron WR21. Initially for the Westinghouse DR (1921), later for the Aeriola Grand receiver of July 1922. The only known Radiola Grand can be seen in the Ford Museum (Douglas). The manufacturing of this tube was discontinued already in September 1922. Needs a ballast tube WB800. Two versions existed: The WR21A (for Amplifier) clear glass tip, and the WR21D (for Detector) with green lacquer tip.
This tube is fitted with a base made by the Shaw Insulator Company and was surplus stock acquired when the Westinghouse company bought the Moorhead inventory in 1920
Texto en otros idiomas
puede diferir
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| Precios de válvulas |
6 Precios de válvulas (visible
solo para miembros)
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| Literatura |
-- Collector info (Sammler)
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WR21: Fin Stewart
Fin Stewart
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Just Qvigstad
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Número de
modelos en Radiomuseum.org con esta
válvula:1
Colección personal de
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