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7W7 Info
Country:  United States of America (USA)      Brand:  Common type USA 
  Tube type:  PENTODE   RF/IF-Stage 
Tube ID = 3958
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Identical to 7W7
Similar Tubes 7V7 (different connections)   6AB7 (other base and data slightly different)  
First Source (s) 07.Nov.1941 : Electron Tube Registration List
Predecessor Tubes 6AB7  
Successor Tubes 6AU7   6CB6  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=Wk)
Was used by Radio/TV-reception etc.
Filament -: Indirect / -: Parallel, (AC/DC) / If: 0.45 Ampere / Vf 6.3 Volts /
Tube prices 0 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  7w7.gif
  Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
373.png
Telefunken Werkstattbuch
Wolfgang Bauer

 
7w7_techdat01.png
Sylvania Technical Manual
Peter Hoddow

Usage in Models   5= 1946? ; 11= 1946 ; 11= 1947? ; 3= 1947 ; 9= 1948 ;
Number of Models with this tube   39
No further Information for

7W7    

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