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 447
to groups ofperhaps 10 turns each. To cover 100 turns of coil, for example,one switch used for coarse adjustment would have 9 points of10 turns each and a zero point, making 10 points in all, and theunits switch w^ould also have 9 points and a zero point. Thenany number of primary turns from 0 to… … Fig. 249.—Receiving transformer. Other arrangements can be used. In the receiving transformershown in Fig. 249 one primary switch has 34 turns betweenpoints, and the other switch has 2 turns between points. Thesecondary switch adjusts by groups of turns; fine tuning isaccomplished by a variable…
Telegraph, Wireless · Radio
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