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7G7

Information - Help 
ID = 3717
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 7G7 = 1232 = 7G7/1232
Similar Tubes
Normally replaceable-slightly different:
  7AG7
Heater different:
  7L7
First Source (s)
30.Jan.1940 : Electron Tube Registration List
Successor Tubes 6AU6  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=W)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.45 Ampere / Indirect / Parallel, (AC/DC)
Description Sharp-cutoff television pentode, similar to 7L7 except for heater current. 
Tube prices 3 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
Tube Lore (I)
  7g7.png
  7G7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
 
7g7~~2.jpg
7G7: 1940
Tor Steinnes

 
358_3.png
7G7: Telefunken Werkstattbuch
Wolfgang Bauer

 
7g7_techdat01.png
7G7: Sylvania Technical Manual
Peter Hoddow


from Just Qvigstad

Usage in Models 2= 1940 ; 1= 1941 ; 4= 1942 ; 5= 1947?? ; 7= 1948??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):19


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