Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 329
GAP- Fig. 333—Special Emergency Transmitter. 318 PRACTICAL WIRELESS TELEGRAPHY AEMAL TUNINGINDUCTMCE … An induction coil fed with a direct current storage battery can be connected as in Pig.334. In this case the rotary spark gap would not be required. The induction coil wouldgive a clearer spark note than a rotary gap because its current output is considerably less than that of a high voltage…
Telegraph, Wireless
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