The principles underlying radio communication (1922)
United States. National Bureau of Standards, Ould, Richard Sheldon, 1889-, United States. Army. Signal Corps · Washington, Govt. Print. Off. · leaf 504
ely modulated—that is, theamplitude of the oscillations is periodically reduced to zero. If it is possible to secure alternating current of an easilyaudible frequency, such as 800 cycles, this type of transmitteris an excellent substitute for the more elaborate electron tubetone transmitters whose… … FlG.ZQZ, A Circuit for a Tube TransmitterSupplied with Alternating Plate Voltaqe Fig. 283, except that with high radio frequencies there will beconsiderably more oscillations per train than could be con-veniently drawn. The voltage of the plate supply is also shownon this diagram. It is evident…
Telegraph, Wireless · Radio
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