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4006

Information - Help 
ID = 50139
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Transmitter Triode, liquid-cooling 
  Ca. 1925 up to 1945 rare.
Identical to 4006
Similar Tubes
Normally replaceable-slightly different:
  4220B

Base SPECIAL TUBEBASE in general
Filament Vf 19 Volts / If 49 Ampere / Direct
Dimensions (WHD)
incl. pins / tip
87 x 492 x mm / 3.43 x 19.37 x inch
Information source - - Manufacturers Literature   not dated
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40061.png
4006: own collection
Peter den Boer

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