Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 107
35 fe … C-J Pig. 110—Diagram Showing Changes Necessary to shift from 600 meter to 300 meter Wave. 96. The Standard Waves of Commercial Wireless Telegraphy.^-The rulesof the International Radio-Telegraphic Convention require the use of two stand-ard waves for the dispatch of commercial wireless traffic,…
Telegraph, Wireless
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