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ID = 12468
United States of America (USA)
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Transmitting Tetrode, air cooled   Power/Output 
Identical to 865 = UX865 = E765 = 565
Similar Tubes
Normally replaceable-slightly different:
  38165 ; CV2676 ; VT-55

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Br) Top contact with a cap.
Was used by Transmittertube (Radio)
Filament Vf 7.5 Volts / If 2 Ampere / Direct / Specified voltage AC/DC
Description Work started on development of this tube at the GE laboratories in the Fall of 1927 and it was assigned the type number (UX865) in November 1928. It was released to the public in March 1929. ST-16 bulb. Thoriated tungsten filament. Gm 0.75 mS, 15W anode dissipation, 15MHz.
GE, RCA, Westinghouse known sources. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
Tube Lore (I)   
- - Manufacturers Literature
Christian Schaufelberger

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865: ARRL Handbook 1972
Michael Schlör

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865: RCA de forest amateur 1934
Miguel Angel Trujillo-Rodriguez

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