Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 178
eadjusted by setting the buzzer into action andchanging the position of the opposing contacton the crystal until the loudest signals are ob-tained. The ordinary vibrating buzzer can beput to a variety of uses in radio telegraph systems, such as exciting the circuits of a j- ,■ , wavemeter or… … 194a—3,000-Ohm Head TelephoneReceiver. 168 PRACTICAL WIRELESS TELEGRAPHY. is determined by the product obtained in multiplying the strength of the currentby the number of turns, e. g., the ampere turns determine the magnetizing flux.Hence, if a feeble current only is available, a magnet wound with…
Telegraph, Wireless
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