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12B7

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ID = 4034
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Raytheon Mfg. Co.; Cambridge, MA 
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 12B7 = 14A7/12B7 = 14A7
Similar Tubes
Normally replaceable-slightly different:
  12B7ML
First Source (s)
12.Jun.1939 : Electron Tube Registration List 192

Base Loctal-8, B8G (Sylvania, 1938) (Codex=W)
Filament Vf 12.6 Volts / If 0.15 Ampere / Indirect / Specified voltage AND current AC/DC
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

358_9.png 12B7: Telefunken Werkstattbuch
Wolfgang Bauer

More ...

Just Qvigstad
Usage in Models 1= 1924? ; 7= 1939 ; 4= 1940 ; 16= 1941 ; 19= 1942 ; 4= 1946? ; 13= 1946 ; 3= 1947 ; 5= 1948 ; 2= 1949?? ; 1= 1951??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):75

Collection of

 
silvertone_12b7_front.jpg

12B7
 

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