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Practical wireless telegraphy; a complete text book for students of radio communication (1917)

Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 232

An illustration from Practical wireless telegraphy; a complete text book for students of radio communication, 1917, leaf 232 — 3 TURNS COpPLING COUPLING • 8 INCHtSOR If SRADUkTEOSCALE GIVE RE(iOK\ thus: coupling SCALE 14 … =^6 2 TURNSCOUNTING FROMOUTSIDE

Telegraph, Wireless

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