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Dex440

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ID = 28507
       
Country:
Great Britain (UK)
Brand: Economic Electric, London
Tube type:  Triode, vacuum   Universal 
Identical to Dex440
First year 1926 Saga of the Vacuumtube, Tyne Seite 388
First Source (s)
1925 : British Radio Valves - The Vintage Years, Thrower p.50

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Vf 4 Volts / If 0.4 Ampere / Direct / Battery =
Description

General name "Dextraudion".

 
Text in other languages (may differ)
 
b4_triode~~5.png
Dex440: Fin Stewart
Fin Stewart

 

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