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Practical Antenna Handbook
www.apparentlyapparel.comPractical Antenna Handbook Fourth Edition Joseph J. Carr McGraw-Hill New York Chicago San Francisco Lisbon London Madrid Mexico City Milan New Delhi San Juan Seoul ... All radio prior to about 1916 was carried on via telegraphy (i.e., the on-off keying of a radio signal in the Morse code). But in 1916 some more magic happened.