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WR21A

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ID = 27341
       
Country:
United States of America (USA)
Brand: Westinghouse El. & Mfg. Co. - see also Canadian W.
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Triode, vacuum   Universal 
  <1925 very rare. ***
Identical to WR21A = WR21
Similar Tubes
Normally replaceable-slightly different:
  WR21D
First Source (s)
1920 : Antique Radio Classified L.A.Peckham, 1991
1922 : Saga of the Vacuum Tube, Tyne page 310+312
Production stop Sep.1922

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.8 Ampere / Direct / Battery =
Description

Aeriola WR21A. 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 when the Westinghouse company bought Moorhead Laboratories inventory in 1920

 
Text in other languages (may differ)

b4_1~~76.png WR21A: Fin Stewart
Fin Stewart


Just Qvigstad
Usage in Models 2= 1921

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2

Collection of

 
wr21_1.jpg

 

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