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ID = 5817
United States of America (USA)
Developer: Amperex; New York 
Tube type:  Half-Wave Mercury-Vapor Rectifier   Power-supply 
Identical to 575A = VT-187 = F575A = WL-575A
Similar Tubes
Normally replaceable-slightly different:
  5Q105 ; 875A
Multiple differences or of other kind:

Base Jumbo 4-pin bayonet (1918) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 5 Volts / If 10 Ampere / Direct

15 KV PIV, 2.5 A average, 10 A peak, 10 V typical voltage drop.

Glass bulb evolved from early spherical shape to stepped tubular.

Dimensions (WHD)
incl. pins / tip
x 250 x 90 mm / x 9.84 x 3.54 inch
Information source Essential Characteristics, GE 1973   
Tube Lore (II)   p. 154
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49

575a_so.png 575A: ARRL Handbook 1972
Anonymous 10 Collector

Just Qvigstad
575A: RCA Transmitting Tubes TT-5
Emilio Ciardiello

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