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ID = 38130
Great Britain (UK)
Brand: Marconi's Wireless Telegraph Co. Ltd.
Tube type:  Half-Wave Rectifier, gasfilled 
Identical to E2542
Similar Tubes
Normally replaceable-slightly different:
  CV2399 ; GXU3
Successor Tubes CV2399  

Base Edison giant, E40 = 40 mm-Goliat Top contact with a cap.
Filament Vf 4 Volts / If 11 Ampere / Direct
Description Va <13 kV peak, Ia <6A peak, 1.25A mean. 
Dimensions (WHD)
incl. pins / tip
60 x 240 x mm / 2.36 x 9.45 x inch
Information source Universal Vade-Mecum, Electron Valves and Semiconductor Devices   group 63
-- Original-techn. papers.   

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