Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 163
al circuit includes a short wave variable condenser which in the 180°position short circuits itself automatically by means of special contacts fitted tothe movable and stationary plates. The secondary coil divided into 10 groups 152 PRACTICAL WIRELESS TELEGRAPHY. is fitted with an end-turn switch… … AERIAL
Telegraph, Wireless
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