Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 177
inner and outer balls are generally wound with No. 24 B. and S. wire if connected in the antenna circuit and with No. 32 B. and S. wire, if connected in series with the secondary or detector circuit. Although the variometer is a very useful instrument for tuning the re-ceiver, it possesses the… … Fig. 193—The Tuning Variometer Complete. *See paragraph 30; also fig. 18.tSee section H appendix. RECEIVING CIRCUITS, DETECTORS, TUNING APPARATUS. 167
Telegraph, Wireless
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