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ID = 28525
United States of America (USA)
Brand: DeForest-Tubes
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to DR_deForest
First year 1927 ?? Saga of the Vacuum Tube, Tyne Seite 301
First Source (s)
1927 : Saga of the Vacuum Tube, Tyne p.301-304

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Filament Vf 7.5 Volts / If 1.25 Ampere / Direct / Parallel, (AC/DC)

Tube fitted with "Isolantite"ase (a type of ceramic) First made 1927

Information source Saga of the Vacuum Tube, Tyne   p.301-304
-- Collector info (Sammler)   
DR_deForest: Fin Stewart
Fin Stewart


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