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ID = 28582
United States of America (USA)
Brand: DeForest-Tubes
Developer: DeForest-Tubes 
Tube type:  Transmitting Triode, air cooled   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to H_DeForest
Similar Tubes
Multiple differences or of other kind:
First year 1926 Saga of the Vacuum Tube, Tyne page 301, 303, 304, 329

Base Wires Wires only.
Was used by Transmittertube (Radio)
Filament Vf 10 Volts / If 2.35 Ampere / Direct / Specified voltage AC/DC

150 Watts input. Va = 3ooo Volts. Ia = 50 mA. Unbased, with widely separated leads. For use up to 300 MHz !

Tube prices 1 Tube prices (visible for members only)
Information source Saga of the Vacuum Tube, Tyne   Pages 301, 303, 304 & 329
H_DeForest: RMG
Robert Gillespie

More ...
H_DeForest: QST 9/1926, p. 45
Otto Frosinn

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