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ID = 28844
United States of America (USA)
Brand: General Electric Co. (GE); Bridgeport CT, Syracuse NY
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
  Late but no serial production. For instance only development samples. *****
Identical to UV213
Similar Tubes
Other base and data slightly different:
First year Dec.1923 Saga of the Vacuum Tube, Tyne page 324
Successor Tubes UX213  

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 2 Ampere / Direct / Parallel, (AC/DC)

Work started on this tube at the GE laboratories in the Fall of 1923 and the tube was announced in the summer of 1924. It was released to the public in September 1925 and first advertised in Radio News in the October 1925 issue. Renamed for final base into UX213 and subsequently discontinued with the development of the UX280 tube in 1927.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 137 x 54 mm / x 5.39 x 2.13 inch
Weight 59 g / 2.08 oz
UV213: Fin Stewart
Fin Stewart


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