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ID = 3746
United States of America (USA)
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 7V7 = 1231
Similar Tubes
Different connections:
Other base and data slightly different:
First Source (s)
21.Jan.1941 : Electron Tube Registration List
Predecessor Tubes 6AB7   1231  
Successor Tubes 6AU6  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=W)
Filament Vf 6.3 Volts / If 0.45 Ampere / Indirect / Specified voltage AC/DC
Description Power/video amplifier, sharp-cutoff pentode. Gm 5.8mSm, 4W. Actually it has four grids, G2 and G3 being parallel connected as screen. 
Tube prices 4 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  7V7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Anonymous 10 Collector
7V7: From own collection
David Erali

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7V7: Telefunken Werkstattbuch
Wolfgang Bauer

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7V7: Sylvania Technical Manual
Peter Hoddow

from Just Qvigstad

Usage in Models 5= 1941? ; 25= 1941 ; 3= 1942 ; 1= 1946??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):34

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