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
45
The quenched gap consists of a number of disks of brass
about five inches in diameter having thin mica washers set
between and arranged in a pile as in the illustration. The
quenched gap radiates considerably more energy than any
other form of gap and also has the advantage of being
Fig. 56.—Anchor gap.
practically noiseless. The crashing discharge of an ordi-
nary gap produces a very disagreeable penetrating noise
hard to eliminate. In most commercial stations the spark
is muffled to a certain extent by enclosing it in a cylinder
of micanite or some other insulating substance.
Fig. 57.—Wireless key.
The aerial switch is necessary for quickly connecting
the aerial and ground to either the transmitting or receiv-
ing apparatus. Amateurs very often employ a small
“double pole double throw” switch. The switch used in
commercial stations is built in the manner shown in
Fig. 55-