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Purdue and Pittsburgh
The TurboElectric Drive
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100 kilohertz alternating current Amateur Radio Fessenden American Institute antenna apparendy arc oscillator became Bermuda Board on Submarine Brant Rock Canada Canadian circuit Cobb Island combustion cylinder commercial continuous wave copper tube direct current earphones Edison Electric Company Electric Signaling Company Electrical Engineering Electrical Review Electrical World Electrician entrepreneurs equipment Fessenden's patents Figure George Elliott gready Helen Fessenden's heterodyne principle individuals Institute of Electrical Insulation interest intermediate frequency internal combustion engine invention inventor kilohertz laboratory London manufacture Marconi Company National Electric Signaling North Carolina operation oscillating arc period pistons Pittsburgh possible Radio Fessenden Society range received signal rectifier Reginald Fessenden Research Council Scodand Sept setdement solenoids sonic staff Submarine Devices Submarine Signal Company superheterodyne superheterodyne system technical telephone tests transadantic transmission Trenholme Trott U. S. Navy undersea vacuum tube versions Weather Bureau Westinghouse Wireless Telegraphy Wolcott World and Engineer York