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ID = 28519
United States of America (USA)
Brand: DeForest-Tubes
Tube type:  Triode, vacuum   Text 
  Ca. 1925 up to 1945 rare.
Identical to DL9_deForest
First year 1927 ?? Saga of the Vacuumtube, Tyne Seite 301

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Transmittertube (Radio)
Filament Vf 7.5 Volts / If 1.6 Ampere / Direct / Battery =

2 watt transmitting tube with plate voltage 500. Fitted with "Isolantite" base (a type of ceramic). The tube had a spherical bulb shape. First made 1927 and discontinued 1928 with the introduction of the RCA UX210 tube.

Dimensions (WHD)
incl. pins / tip
59 x 107 x mm / 2.32 x 4.21 x inch
Literature - - Manufacturers Literature   
-- Collector info (Sammler)   
DL9_deForest: Fin Stewart
Fin Stewart


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