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ID = 50156
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Half-Wave Rectifier, inert gas filled   Power-supply 
Identical to CV1836 = 4B26 = 289A

Base Edison giant, E40 = 40 mm-Goliat Top contact with a cap.
Was used by Military and/or Government
Filament Vf 2.2 Volts / If 18 Ampere / Direct
Description Tungar rectifier for battery chargers. Pear shaped bulb on Mogul screw base. 375V PIV, 6A.
GE, Hytron, RCA, Westinghouse and WE some of the manufacturers. 
Information source -- Original-techn. papers.   
Emilio Ciardiello

CV1836: Manufacturer's Literature
Emilio Ciardiello

from Just Qvigstad

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