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ID = 13861
United States of America (USA)
Brand: Cunningham Inc., E.T.; Harrison (NJ)
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Triode, vacuum   Universal 
Identical to C11 = WD11 = SLD11 = M11 = 11
Similar Tubes
Other base:
  12 ; CX12 ; WX12
Successor Tubes C12_Triode  

Base WD-base (Codex=Bw)
Was used by Radio/TV-reception etc.
Filament Vf 1.1 Volts / If 0.25 Ampere / Direct / Battery =

This tube had 5 production varants including the original T10 bulb. Later variants had the T8 bulb.

Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   The Cunningham Radio Tubes Manual C-10 1932

C11: KoBi
Konrad Birkner † 12.08.2014

wd11sockelbild_1.png C11: KoBi
Konrad Birkner † 12.08.2014

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Just Qvigstad
C11: Vintage Electronic catalog
Geri Meier

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Collection of



Forum contributions about this tube
Threads: 1 | Posts: 4
Hits: 2956     Replies: 3
C11 (C11)
Daniel Consales
  1 Daten aus "The Cunningham Radio Tubes Manual C-10 1932:

direkt geheizt (DC)
Uh = 1,1V
Ih = 0,25A
Ua = 90V
Ia = 2,5mA
Ug1 = -4,5V
"AC Plate resistance" = 15500 Ohm
"Conductance" = 425 mhos
V = 6,6
Konrad Birkner † 12.08.2014
  2 C11 ist Cunninghams Name für die WD11. Leider ist auf unserem Röhrenblatt die falsche Sockelschaltung! Ausserdem im Text oben ebenfalls der 2dick/2dünn angegeben. Bitte Bilder vergleichen: 
Daniel Consales
  3 S. hier:

Daniel Consales

Konrad Birkner † 12.08.2014
  4 Des Rätsels Lösung:

C11   = WD11;  4 Stift, 1 dick
C12   = WD12;  4 Stifte kurz, UV-Sockel
CX12 = WX12;  4 Stifte lang, 2 dick, UX-Sockel

elektrisch sind sie alle weitgehend gleich. Kein Wunder, denn sie wurden (per Abkommen Cunningham/RCA) gemeinsam gefertigt.

End of forum contributions about this tube

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