Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 129
Fig. 139—Vertical or Fan Aerial. 118 PRACTICAL WIRELESS TELEGRAPHY. W5ULMQRS … Fig. 140—XTmbrella Type Aerial. mentioned that the natural wave length of a four-wire horizontal aerial with the wires spacedabout IVi feet apart will be approximately 4.4 to 4.8 times the total length of the aerial, that is, the length from the extreme end down tothe apparatus at the station…
Telegraph, Wireless
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