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ID = 28965
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Triode, vacuum   Universal 
Identical to 230D
Similar Tubes
Other base and data slightly different:
  UV199 ; UX199
First year 1925 Saga of the Vacuum Tube, Tyne page 295, 297
Successor Tubes D-94230  

Base SPECIAL TUBEBASE in general
Filament Vf 3.3 Volts / If 0.06 Ampere / Direct / Battery =
Description Receiving triode, T8 bulb on four-prong base with locating pin and wired like UX-199. Mu = 8.5, Gm 0.38 to 0.56mS. Grid and filament spring supported by glass bead from top of plate. Developed for Northern Electric as improved UX-199. 
Information source Tube Lore (I)   

uxsockel_11~~54.png 230D: Fin Stewart
Fin Stewart


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