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ID = 5739
United States of America (USA)
Brand: General Electric Co. (GE); Bridgeport CT, Syracuse NY
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Half-Wave Mercury-Vapor Rectifier   Power-supply 
Identical to FG32 = 5558

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Top contact with a cap
Was used by Industrial
Filament Vf 5 Volts / If 4.6 Ampere / Direct
Description This tube is classified as a "Phanotron" by the General Electric Company . It is listed on page 48 of the "Story of Electric Development at the General Electric company". Dated Dec 10th, 1930. The tube is used in applications where rectifications of higher currents at lower frequencies and voltages is desired than is possible with high vacuum tubes. 
Literature Essential Characteristics, GE 1973   
- - Manufacturers Literature   Data sheet ETI147 April 1945
FG32: ARRL Handbook 1972
Michael Schlör


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