Antique radios, Old Time Radios
WR21D
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Country:
United States of America (USA)
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| Identical to |
WR21D
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| Similar
Tubes |
Normally replaceable-slightly different:
WR21A
Other characteristic (electr. data):
WR21
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| First Source
(s) |
1920 : Antique Radio Classified L.A.Peckham, 1991
1922 : Saga of the Vacuum Tube, Tyne page 310+312
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| Production stop |
Sep.1922 |
| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 0.8 Ampere / Direct / Battery = |
| Description |
Aeriola WR21D. For audion stage. Green lacquer tip.
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.
This tube is fitted with a base made by the Shaw Insulator Company and was surplus stock acquired by the Westinghouse Company when they bought the Moorhead laboratories inventory in 1920.
Text in other
languages (may
differ)
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WR21D: Fin Stewart
Fin Stewart
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Just Qvigstad
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
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