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7F7

Information - Help 
ID = 3144
       
Country:
United States of America (USA)
Brand:
Tube type:  Double Triode   Audio Frequency 
Identical to 7F7 = VT-189 = CV893
Similar Tubes
Heater different:
  14F7
Other base:
  6SL7GT
First Source (s)
12.Jun.1939 : Electron Tube Registration List
Predecessor Tubes 6SL7GT  
Successor Tubes 12AX7  
Base Loctal-8, B8G (Sylvania, 1938) (Codex=W)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Tube prices 3 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
7f7.png
7F7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Anonymous 10 Collector
342.png 7F7: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
Just Qvigstad 		7f7_techdat01.png
7F7: Sylvania Technical Manual
Peter Hoddow
More ...
Usage in Models 1= 1940?? ; 1= 1940? ; 2= 1940 ; 9= 1941 ; 2= 1942? ; 8= 1942 ; 2= 1945? ; 1= 1945 ; 2= 1946?? ; 2= 1946? ; 10= 1946 ; 3= 1947?? ; 4= 1947? ; 4= 1947 ; 5= 1948?? ; 9= 1948? ; 10= 1948 ; 4= 1949?? ; 10= 1949? ; 22= 1949 ; 10= 1950?? ; 9= 1950? ; 2= 1950 ; 4= 1951?? ; 12= 1951? ; 2= 1951 ; 4= 1952?? ; 2= 1952? ; 4= 1952 ; 5= 1953?? ; 2= 1955?? ; 1= 1956 ; 1= 1960?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):169

Collection of

Collection of a member from D
Michael Gnaedig-Fischer (MEX)
Emilio Ciardiello (I)
Michael Niermann (D)
Stig Comstedt (S)
Christophe Faure (F)
Aldo Patriarca (CH)
David Erali (USA)
Tomasz Szczesniak (PL)
Peter Pfeiffer (D)
 
westinghouse_7f7_front.jpg

7F7
 
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