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481

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ID = 7470
       
Country:
United States of America (USA)
Brand:
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  High-vacuum Rectifier   Power-supply 
  Ca. 1925 up to 1945 very rare. ***
Identical to 481 = D1/2 = GSX-281 = ER81 = ER281 = RE-2 = 181_Arcturus = PR281 = G81 = AC281 = PA281 = MX281 = TX181 = SLX281 = C-281 = 81 = UX281 = CX381
Similar Tubes
Normally replaceable-slightly different:
  G-81
First Source (s)
Aug.1930 : Philips Bulletin R1164, p. 33
Successor Tubes SLX281  
Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo)
Was used by Radio/TV-reception etc.
Filament Vf 7.5 Volts / If 1.2 Ampere / Direct
Information source Taschenbuch zum Röhren-Codex 1948/49   
70 Years of Radiotubes and V.   Page 166
424_2~~3.png 481: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		481.png
481: own collection
Peter den Boer
Usage in Models 1= 1931
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of

Robert Gillespie (USA)
Collection of a member from D
 
20200525_161903.jpg

481
 
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