File:EB1911 Telegraph - antenna direct-coupled to closed oscillatory circuit.jpg

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Description
English: The antenna are direct-coupled to the closed oscillatory circuit in the manner suggested by F. Braun, A. Slaby and O. Lodge. In this case a closed condenser circuit is formed with a battery of Leyden jars, an inductance coil and a spark gap, and oscillations are excited in it by discharges created across the spark gap by an induction coil or transformer. One end of the inductance coil is connected to the earth, and some other point on the closed condenser circuit to an antenna of appropriate length. When oscillations are created in the closed circuit syntonic oscillations are created in the antenna and electric waves radiated from it.
Date published 1911
Source Encyclopædia Britannica (11th ed.), v. 26, 1911, “Telegraph,” p. 534, Fig. 41.
Author John Ambrose Fleming (section author)
Permission
(Reusing this file)
Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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current15:54, 16 March 2016Thumbnail for version as of 15:54, 16 March 2016836 × 297 (33 KB)Library Guy{{Information |Description ={{en|1=The antenna are direct-coupled to the closed oscillatory circuit in the manner suggested by F. Braun, A. Slaby and O. Lodge. In this case a closed condenser circuit is formed with a battery of Leyden jars, an induc...