Wireless Telegraphy and Telephony
Forfatter: Alfred P. Morgan
År: 1917
Forlag: The Norman W. Henley Publishing Company
Sted: New York
Udgave: Third Edition, Fully Illustrated
Sider: 33
UDK: 621.396.1 Mor
A practical Treatise on Wireless Telegraphy and Telephony, giving Complete and Detailed Explanations of the Theory and Practice of Modern Radio Apparatus and its Present Day Applications, together with a chapter on the possibilities of its Future Development
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42
WIRELESS TELEGRAPHY
frequency oscillations. Inductance is the property of an
electric circuit by virtue of which lines of force are
developed around it. The helix furnishes the inductance
in the circuit or at least the greater part. Connections are
established to the turns of the helix by means of clips
which snap on and off the wires.
Fig. 51.—Circuit showing tuned transmitting system employing close
coupled helix.
The spark gap is the medium for discharging the aerial
and condenser and setting up the oscillations. It usually
consists of a pair of electrodes supported by suitable stand-