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7918A

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ID = 32483
       
Country:
Italy
Brand: Marconi Italiana (Marconifono), Officine / Ufficio Marconi; Genova, Roma
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to 7918A
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Other shape (e.g. bulb type):
  7918

Filament Vf 6.3 Volts / If 88 Ampere / Direct
Description External anode, forced air cooling power triode. Thoriated tungsten direct heating cathode. 4.5KW max anode power dissipation. Intended for industrial applications. The 7218A was similar to the 7918, with a smaller heatsink and reduced power ratings. 
Information source - - Manufacturers Literature   
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7918A: Manufacturer's Literature
Emilio Ciardiello

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