. Practical wireless telegraphy; a complete text book for students of radio communication . operatorat a given receiving station adjuststhe position of the sliding contacton the potentiometer for maximumsignals, he adjusts the flow of cur-rent through the crystal and headtelephone to correspond to thecritical point on the characteristiccurve, or, in other words, to thatpoint on the curve where the super-position of a slight antenna E. upon the local E. M. F. causes arelatively large change in thestrength of the local battery cur-rent. And it also follows that thesteeper the characteristic
. Practical wireless telegraphy; a complete text book for students of radio communication . operatorat a given receiving station adjuststhe position of the sliding contacton the potentiometer for maximumsignals, he adjusts the flow of cur-rent through the crystal and headtelephone to correspond to thecritical point on the characteristiccurve, or, in other words, to thatpoint on the curve where the super-position of a slight antenna E. upon the local E. M. F. causes arelatively large change in thestrength of the local battery cur-rent. And it also follows that thesteeper the characteristic curve ofa given crystal, the greater will bethe change of current for a givenimpressed alternating voltage. Inother words, the crystal with asteep curve will give the loudestsignals and is said to be more sen-sitive to incoming oscillations. 132. Adjustment of CrystalDetectors.—No specific rule for lo-cating the sensitive spot on a crystalrectifier can be laid down; in fact, thepressure and position of the opposingcontact for maximum signals can onlybe dete;-mined by experiment. Car-. CAR60RUNDUM/CRYSTAL STEtL CONTACT POINT Fig. 158—Carborundum Detector Complete. 140 PRACTICAL WIRELESS TELEGRAPHY.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
