The principles underlying radio communication (1922)
United States. National Bureau of Standards, Ould, Richard Sheldon, 1889-, United States. Army. Signal Corps · Washington, Govt. Print. Off. · leaf 441
liconusually have sensitive spots all over their surface, which varycomparatively little in sensitivity. A sensitive spot on agalena crystal may entirely lose its sensitivity if acted uponby an unusually strong signal, caused, for instance, by strongstatic. When this occurs it is necessary to move… … Fig. 245.—One method of mounting crystal detectors. For some purposes it is desirable to have a permanent con-tact detector which will not require any readjustment oJ thecontact at all. There are several ways in which such de-tectors may be constructed, but in general they are found tobe much less…
Telegraph, Wireless · Radio
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