Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 221
1.35, then K = 0.84.b(o) Example 1.—Assume a coil of 10 turns with mean diameter of 18 inches, and overalllength including the insulation (if any) of 12.5 inches. The inductance is calculated as follows:n = 10 turns;b = 31.75 centimeters;a = 22.9 centimeters;2a 18 — = — =1.44 and from Fig. 230 K =… … OB 4 PRACTICAL RADIO MEASUREMENTS. 211 (6) Example 2.—Calculate the inductance of a coil three inches in diameter, 8 inches inlength, wound closely with No. 26 double silk-covered wire. From the table on page 213 thediameter of No. 26 D. S. C. wire is .02014 inches, hence, 8 n = ■ = 397 turns;…
Telegraph, Wireless
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