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ES9

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ID = 27662
       
Country:
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Transmitting Triode, air cooled   Power/Output 
  <1925 rare.
Identical to ES9

Base Edison giant, E40 = 40 mm-Goliat
Filament
Description 250W RF output 
Information source - - -   
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