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225A

Information - Help 
ID = 75132
       
Country:
United States of America (USA)
Brand: Sonatron Tube Company; Chicago and New York
Tube type:  Triode, vacuum 
  Ca. 1925 up to 1945 rare.
Identical to 225A = 401_McCullough

Base UX-Base (4 Pins (2 thick, USA 1924, UX) 2 Top contacts
Was used by Radio/TV-reception etc.
Filament Vf 3 Volts / If 1 Ampere / Indirect / Parallel / series AC/DC
Literature - - Manufacturers Literature   
 
sonatron_225a_sidepin_tube1_small.jpg
225A: Collection of Chris Benson
Chris Benson

 
usa_401_kellogg_sockel_1~~1.png
225A: O.F.
Otto Frosinn

 
sonatron_225a.gif
225A: own collection
Peter den Boer



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