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ID = 15260
United States of America (USA)
Developer: Triad Television & Mfg. Co.; Pawtucket, RI 
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to 6D5MG
Similar Tubes
Other shape (e.g. bulb type):
  6D5 ; 6D5G
First Source (s)
08.Jul.1935 : Electron Tube Registration List 34

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=U)
Filament Vf 6.3 Volts / If 0.65 Ampere / Indirect / Parallel, (AC/DC)
Description Glass bulb inside a metal envelope.
According to Lud Sibley, the 6D5 was announced in its variants, metal or G, but never produced in quantity.
1935 and later, as any octal-based tube. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
Tube Lore (I)   
6D5MG: Joe Reda collection
Joe Reda

6D5MG: Manufacturer's Literature
Emilio Ciardiello


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