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7W7

Information - Help 
ID = 3958
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 7W7 = 1282 = CV902
Similar Tubes
Different connections:
  7V7
Other base and data slightly different:
  6AB7
First Source (s)
07.Nov.1941 : Electron Tube Registration List
Predecessor Tubes 6AB7  
Successor Tubes 6AU7   6CB6   14W7  

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

  7w7.png
  7W7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
 
7w7nationalunion_klein.jpg
7W7
Geri Meier

 
373.png
7W7: Telefunken Werkstattbuch
Wolfgang Bauer

 
7w7_techdat01.png
7W7: Sylvania Technical Manual
Peter Hoddow


Usage in Models 4= 1946? ; 11= 1946 ; 8= 1947? ; 13= 1947 ; 2= 1948? ; 11= 1948 ; 1= 1950?? ; 2= 1950?
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):52

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