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281

Information - Help 
ID = 7454
       
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 281 = 1562_UX4-pin = AC81 = UX281 = PR281 = X281 = T-81 = G81 = NX-281 = RYB281 = PA281 = MX281 = TC281 = TX181 = SLX281 = C-281 = SX-281
Similar Tubes
Normally replaceable-slightly different:
  R81_USA
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 1.25 Ampere / Direct / Parallel, (AC/DC)
Description

Max. Plate Voltage: 750 V
Max. Plate Current: 110 mA

 
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
281001.jpg
281: Sammlung GJ
Anonymous 544 Collector

 
s_211_g_2.gif
281: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe

 

from Just Qvigstad

Usage in Models 1= 1927 ; 2= 1928? ; 16= 1928 ; 1= 1929?? ; 3= 1929? ; 18= 1929 ; 4= 1930?? ; 3= 1930? ; 9= 1930 ; 2= 1931?? ; 1= 1931? ; 3= 1931 ; 4= 1932 ; 1= 1935?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):68

Collection of a member from D

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