Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 178
Fig. 193—The Tuning Variometer Complete. *See paragraph 30; also fig. 18.tSee section H appendix. RECEIVING CIRCUITS, DETECTORS, TUNING APPARATUS. 167 … pie tuning coil of the same value of inductance, would obviously possess lessresistance. 149. Buzzer Excitation Systems.—If any part of an active vibrating buzzer(energized by a battery) is placed in inductive relation to either the open or closedcircuits of a receiving set, the fluctuations of the…
Telegraph, Wireless
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