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31 Info
Country:  United States of America (USA)      Brand:  Common type USA 
  Tube type:  Triode, vacuum   Power/Output 
Tube ID = 3650
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Identical to 31 = CX331 = 231 = RCA231
Similar Tubes VT-31 (can normally be replaced - small diff'ce)   FP60 (can normally be replaced - small diff'ce)  
First Series   1930 Radios von gestern
First Source (s) Sep.1930 : -- Collector info (Sammler)

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo)
Was used by Radio/TV-reception etc.
Filament -: Direct / -: Battery = / If: 0.13 Ampere / Vf 2 Volts /
Description First USA 2V battery type output tube. 
Tube prices 0 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
70 Years of Radiotubes and V.
Saga of the Vacuumtube, Tyne

  31.png
  Internet
Miguel Angel Trujillo-Rodriguez
rca31.jpg
RCA Radiotron USA
Jose Vigil

 
171_13.png
Telefunken Werkstattbuch
Wolfgang Bauer

 
31_techdat01.png
Sylvania Technical Manual
Peter Hoddow

Usage in Models   2= 1930?? ; 1= 1930? ; 7= 1930 ; 1= 1931?? ; 5= 1931? ; 15= 1931 ; 7= 1932? ; 7= 1932 ; 4= 1933 ; 1= 1934?? ; 3= 1934 ; 3= 1935 ; 1= 1939 ;
Number of Models with this tube   57
No further Information for

31    

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05DecX