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UBF11

Country:  Europe      Brand:  Common type Europe 
  Developer:  Telefunken Deutschland (TFK) 
  Tube type:  Double Diode-Pentode   RF/IF-Stage   Controlling (mu) 
Tube ID = 703
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Identical to UBF11
Similar Tubes Other shape (e.g. bulb type):
 UBF11g
Heater different:
 VBF11
Other base:
 UBF171
First Series   Jul.1939 Tube leaflet collection E.Erb Analysis by original leaflets (V7, T8)
First Source (s) 23.Jul.1939 : Funkschau (FS) 1939 #30
Successor Tubes 1948 UBF80   UAF42   UBF15   UBF171  
Base German Steel Y8A, 1938 (Codex=Rh)
Was used by Radio/TV-reception etc.
Filament Vf 20 Volts / If: 0.1 Ampere / -: Indirect / -: Series, AC/DC /
Tube prices 2 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  ubf11.gif
  Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus
ubf_tf_r.jpg
collection JR
Jacob Roschy
 
Variants
ubf11.gif
JK Prüfkarte Röhrenprüfgerät W 18N
Jörg Kulbe
 
ubf11_techdat01.png
SEL Handbuch 1964
Peter Hoddow
Usage in Models (calculation each 25th of the month)   8= 1939? ; 49= 1939 ; 2= 1940?? ; 13= 1940? ; 29= 1940 ; 1= 1941?? ; 1= 1941? ; 32= 1941 ; 2= 1942? ; 23= 1942 ; 5= 1943? ; 3= 1943 ; 1= 1944?? ; 1= 1944? ; 6= 1944 ; 1= 1945?? ; 4= 1945 ; 1= 1946?? ; 14= 1946 ; 1= 1947?? ; 1= 1947? ; 54= 1947 ; 6= 1948? ; 56= 1948 ; 1= 1949?? ; 7= 1949? ; 82= 1949 ; 2= 1950?? ; 3= 1950? ; 78= 1950 ; 4= 1951? ; 15= 1951 ; 2= 1952?? ; 1= 1952? ; 7= 1952 ; 1= 1953? ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   540

  Variants


o
UBF11*DDR-glass

Glass- version of the former GDR w/ horizontal structure

28.Feb.2009 Jacob Roschy
UBF11*Telefunken-glass

UBF11 glass version by Telefunken after 1945 with vertical electrode structure w/out suffix G in the designation

28.Feb.2009 Jacob Roschy
MS
Martin Steyer
No further Information for

UBF11    

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