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7F8

Information - Help 
ID = 3558
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Double Triode   VHF 
Identical to 7F8 = CV2968
Similar Tubes
Other class quality (otherwise equal):
  7F8W
Heater different:
  14F8
First Source (s)
31.Jul.1944 : Electron Tube Registration List
Successor Tubes 12AT7   6169  
Base Loctal-8, B8G (Sylvania, 1938) (Codex=Ue)
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC
Tube prices 2 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  7f8.png
  7F8: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
 
7f8kl_1.jpg
7F8: J.B.
Jürgen Bauch
 
580.png
7F8: Telefunken Werkstattbuch
Wolfgang Bauer
 
7f8_techdat01.png
7F8: Sylvania Technical Manual
Peter Hoddow

from Just Qvigstad
Usage in Models 1= 1945 ; 18= 1946 ; 1= 1947?? ; 10= 1947? ; 38= 1947 ; 3= 1948?? ; 10= 1948? ; 68= 1948 ; 4= 1949?? ; 8= 1949? ; 25= 1949 ; 10= 1950?? ; 7= 1950? ; 3= 1950 ; 3= 1951?? ; 3= 1951? ; 7= 1951 ; 8= 1952?? ; 2= 1952? ; 5= 1953?? ; 1= 1954 ; 1= 1955 ; 2= 1965
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):238
Collection of Christian Schaufelberger (CH)
Collection of Aldo Patriarca (CH)
Collection of Jürgen Bauch (D)
Collection of Danko Tkalec (HR)
Collection of a member from FIN
Collection of Tomasz Szczesniak (PL)
Collection of Stig Comstedt (S)
Collection of Michael Gnaedig-Fischer (MEX)
Collection of David Erali (USA)
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