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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WIRELESS TELEGRAPHY
63
ranged that connection can be macle almost instantly to
any desirable turn of wire. The tuning coil is connected
to the aerial and receiving apparatus in the manner illus-
Fig. 78.—Tuning coil of the double slide type.
trated in Fig. 79. By moving the sliders back and forth
the wave length of the system may be added to or detracted
from and any desired “tune" quickly reached so that it is
Fig. 79.—Diagram showing fixed condenser in circuit.
possible to listen to any station desirable and exclude the
others. The cylinder over which the wire is wound
usually consists of a thick cardboard tube treated so as