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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68
WIRELESS TELEGRAPHY
In the sliding plate type of variable condenser the plates
are either square or rectangular in shape and move back
Fig. 84.—Sliding plate variable condenser.
and forth in grooves cut in a hardwood frame as shown in
the illustration.
Variable condensers are used for tuning and adjusting
Fig. 85.—Diagram showing arrangement of rotary variable con-
denser in receiving circuit.
the receiving circuit in the same way that a tuning coil
is employed, namely to increase or decrease the electrical
length of the circuit so that it will respond to different