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R81_USA

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ID = 20110
       
Country:
United States of America (USA)
Brand:
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to R81_USA = AC81 = G81 = UX281 = CX381
Similar Tubes
Normally replaceable-slightly different:
  1562_UX4-pin ; 281 ; 81 ; R281
Other base:
  1562
First Source (s)
1928 : Saga of the Vacuum Tube, Tyne p.344

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 7.5 Volts / If 1.25 Ampere / Direct / Specified voltage AC/DC
Description

Tube also made by the National Radio Tube co of San Francisco.

 
Dimensions (WHD)
incl. pins / tip
x 145 x 62 mm / x 5.71 x 2.44 inch
Weight 63 g / 2.22 oz
Information source -- Collector info (Sammler)   
Philips Bulletin   Philips Radiolamp equivalents R1164, p. 10
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren

r81_usa_so.png R81_USA: ARRL Handbook 1972
Anonymous 10 Collector


Just Qvigstad

Collection of

 
ceco_r81.jpg

R81_USA
 

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