Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 230
udibility meter. —H *Curve A, Fig. 239, shows the signal audibility throughout the 24 hours of the day from Ketchikanto Astoria. Curve _S shows the intensity of atmospheric electricity. It is interesting to note the distinctrise in both the signal and static intensity near to midnight and the… … i^QO 500 400 fiOO 900 500 600 70Q WAVE LENGTH IN METERSFig. 240—Curves Showing the Effect on the Radiated Wave By Progressive Reduction of the Coupling at the Oscillation Transformer. 182. Tight and Loose Coupling.—The adjustment of the coupling ofan oscillation transformer is important because if…
Telegraph, Wireless
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