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In the U S Navy
Work for Fritz Lowenstein
Rf detector action
5 other sections not shown
Alexanderson alternator amplitude amplitude modulation antenna apparatus audion beat frequency boat claims coil condenser coupling crystal cuit cycles demonstrations described detector developed device disclosed disclosure electric dog electrolytic detectors Espenschied Forest frequeucies G. W. Pierce Gloucester grid Hammond to Miessner Hammond-Purington paper high fre high frequency Huntingburg interference interlinked interrupted invention ion controller ionized John Hays Hammond laboratory later Lee de Forest letter Loftin Lowenstein Miessner modulation multiplex Nikola Tesla notebook oscillator output patent applications patent attorney Pioneer plate circuit Purdue Purington quency radio control Radio Engineers radio frequencies radio receiver receiving circuit rectified relay rf carrier rf-IF-af royalties searchlight selective system signals sketch spark Splitdorf station steering motor stepping switch superheterodyne switch Telefunken telegraphy telephone Tesla testimony tion torpedo torpedo-control transmitter triode tube tuned circuits U.S. Navy U.S. Patent vacuum-tube amplifiers wave trains wire wireless operator wrote York