Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 199
G, and will be dissipated into the ground. This method pro-tects signals to a certain degree from interception or interference, and further-more, by employing a number of differently constituted receiving circuit, eachcapable of responding only to waves of certain lengths, they may be connectedto a… … ,|.J-l Vbattery Fig. 3,127.—The Fessenden tuned system. There are many variations of this system. In thecase# illustrated, the transmitting system comprises the antenna consisting of 15 or 20vertical wires, the induction coil C, the spark gap G, the key K, for throwing the aerialwire in and out of…
Electrical engineering
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