Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 169
Fig. 177—Universal Crystal Receiver (English Marconi Company). 158 PRACTICAL WIRELESS TELEGRAPHY. … Electrolytic B-1, the terminals X and X-1 extending to a small switch alongside the transmitting key.Closing this switch energizes the magnets, which draw the contacts on either side of thecrystal apart, completely disconnecting all attached circuits and thereby protecting the _ detector fom…
Telegraph, Wireless
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
