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 393
es under 30,000, aneedle gap is fairly satisfactory. The needle gap is somewhatinconvenient because results depend to some extent on thediameter and the sharpness of the needles and because theneedles must be replaced after each discharge. Fig. 214 showsthe maximum values of sparking voltages… … Length of Spark Gap - centimeters also shows for air at atmospheric pressure the maximumvalues of sparking voltages corresponding to various lengths ofgap with terminals consisting of spheres one inch (2.54 cm.) indiameter. The results used in plotting both curves were ob-tained with alternating…
Telegraph, Wireless · Radio
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