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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58
WIRELESS TELEGRAPHY
small cup. A flat brass point mounted on the end of an
adjustable thumbscrew is brought to bear on the silicon.
Other mineral detectors of value are the Pyron, molyb-
enite and galena.
The carborundum detector is a form of crystal rectifier
Fig. 71.—Silicon detector.
consisting of a fragment of carborundum held between
two carbon blocks.
The electrolytic detector consists of a very fine platinum
wire (.001-.0003 of an inch in diameter) clipping into a
small cup of dilute nitric acid. A large platinum electrode
Fig. 72.—Electrolytic detector.
is sealed in the bottom of the cup so as to make an elec-
trical connection with the liquid. This form of detector
is exceedingly sensitive, probably more so than any other.
The electrolytic detector requires a battery. When a slight
current passes through the circuit, very minute bubbles are