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7K7

Country:  United States of America (USA)      Brand:  Common type USA tube/semicond. 
  Tube type:  Double Diode-Triode   Detector 
Tube ID = 2995
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Identical to 7K7 = CV896
Similar Tubes Other base:
 6AQ7GT
First Source (s) 15.Aug.1941 : Electron Tube Registration List
Base Loctal-8, B8G (Sylvania, 1938) (Codex=Ve)
Filament Vf 6.3 Volts / If: 0.3 Ampere / -: Indirect / -: Parallel / series AC/DC /
Description The construction of the 7K7 is based on the twin triode 7F7, whereby the second triode unit is altered into a double diode by using the two grid rods as diode anodes, (without grid windings), and the anode cylinder acts only as shield. 
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Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  7k7.png
  7K7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
7k7_284r.jpg
7K7: Collection JR
Jacob Roschy
 
333.png
7K7: Telefunken Werkstattbuch
Wolfgang Bauer
 
7k7_techdat01.png
7K7: Sylvania Technical Manual
Peter Hoddow
Usage in Models   1= 1938 ; 5= 1941 ; 2= 1942? ; 2= 1942 ; 1= 1946 ; 2= 1948 ; 1= 1949 ; 1= 1950?? ; 4= 1950 ; 1= 1952??
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   20
7K7*Box
    
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