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ID = 17471
United States of America (USA)
Tube type:  Half-Wave Mercury-Vapor Rectifier   Power-supply 
Identical to 875 = 875_Versch = 575_DeForest = TL15
Similar Tubes
Normally replaceable-slightly different:
  975A ; CV644
Successor Tubes 875A   F375A   VT-187  

Base Jumbo 4-pin bayonet Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 5 Volts / If 12.5 Ampere / Direct

Mercury rectifier, tubular bulb with cap and suoer-jumbo base (A4-29).

  • 15 kV PIV
  • 1.5 A average, 2.5 A peak plate current.

Common rectifier in US, intended for the power supply of 5 kW transmitters.

Superseded by 875A with thoriated-tungsten filament.


Dimensions (WHD)
incl. pins / tip
x 274 x 97 mm / x 10.79 x 3.82 inch
Information source Taschenbuch zum Röhren-Codex 1948/49   
Tube Lore (I)   
875: Electronics, April 1932
Achim Dassow

875: Manufacturer's Literature
Emilio Ciardiello


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