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ID = 28514
United States of America (USA)
Brand: DeForest-Tubes
Developer: DeForest-Tubes 
Tube type:  Triode, vacuum   RF/IF-Stage 
  Ca. 1925 up to 1945 rare.
Identical to DL2_deForest
Similar Tubes
Other base and data slightly different:
First year 1926 ?? Saga of the Vacuumtube, Tyne Seite 301

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.25 Ampere / Direct / Battery =

Plate voltage 150. First made in 1926 with a black bakelite base. This was changed to "Isolantite" (a type of ceramic) in 1927. Production discontinued 1928.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 107 x 34 mm / x 4.21 x 1.34 inch
Tube prices 5 Tube prices (visible for members only)
Literature Saga of the Vacuumtube, Tyne   Page 301
DL2_deForest: O.F.
Otto Frosinn

DL2_deForest: O.F.
Otto Frosinn


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