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7J7

Information - Help 
ID = 2729
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Philco, Philadelphia Stg. Batt. Co.; USA 
Tube type:  Triode-Heptode   Frequency converter 
Identical to 7J7 = VT-194 = CV897
Similar Tubes
Heater different:
  14J7
Other base:
  6J8G
First Source (s)
05.Jun.1942 : Electron Tube Registration List 202
12.Jul.1939 : Electron Tube Registration List
Predecessor Tubes 7J7E  
Successor Tubes 7S7  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=Wfo)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC
Description

First registered in 1939 as triode-hexode, was re-registered to Sylvania Hygrade in June 1942, with the addition of a suppressor grid internally connected to cathode.
See also 7J7E.

 
Tube prices 1 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature
  7j7.png
  7J7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
 
7j7_2.jpg
7J7: Sammlung PR
Peter Roggenhofer † 25.4.18

 
415_1.png
7J7: Telefunken Werkstattbuch
Wolfgang Bauer

 
7j7_techdat01.png
7J7: Sylvania Technical Manual
Peter Hoddow


Usage in Models 3= 1939? ; 11= 1939 ; 1= 1940? ; 7= 1940 ; 17= 1941 ; 2= 1942?? ; 1= 1942 ; 1= 1943? ; 2= 1945? ; 1= 1946?? ; 2= 1946? ; 4= 1946 ; 2= 1947 ; 7= 1948?? ; 5= 1948 ; 1= 1949? ; 1= 1949

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):68


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