Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 202
RADIO MEASUREMENTS. 191 tion coil fitted with a vibrator, S-1 a spark discharge gap of simple design con-nected in series with the aerial A-1. L is the inductance coil of the wavemeter; Cthe variable condenser; D a crystal rectifier, and P the head telephone. When the induction coil is set in… … Fig. 212—Showing How an Aerial May Be Set IntoExcitation by Buzzer. 4 V LCand a corresponding wave motion is prop-agated through space. Now if the coil of the wavemeter Lbears the correct inductive relation to theaerial wire, preferably placed near to theearth lead, oscillations of maximum…
Telegraph, Wireless
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