. The principles underlying radio communication . jLL*. Fiq. 237 4* ± X ■$■ Inductively eout>l*i or very short w*v«8 rent are filled in, and the cumulative effect of a wave group isstrengthened. In practice the telephone cord, containing as itdoes two conductors separated by dielectric, forms a condenserwhich in some cases is sufficient so that an added fixed con-denser gives no improvement. The connection in Fig. 236 is similar in its action to thedirect coupled arrangement of Fig. 235. In either case, onaccount of the coupling between the primary and secondarycoils, there are reactions of
. The principles underlying radio communication . jLL*. Fiq. 237 4* ± X ■$■ Inductively eout>l*i or very short w*v«8 rent are filled in, and the cumulative effect of a wave group isstrengthened. In practice the telephone cord, containing as itdoes two conductors separated by dielectric, forms a condenserwhich in some cases is sufficient so that an added fixed con-denser gives no improvement. The connection in Fig. 236 is similar in its action to thedirect coupled arrangement of Fig. 235. In either case, onaccount of the coupling between the primary and secondarycoils, there are reactions of each coil upon the other, with con-sequent double oscillations when the coils are near Section 165. If the coupling is tight and the resistancehigh, sharp tuning becomes impossible. It is found, however,that if the coupling is not too tight and the resistance of the cir- RECEIVING CIRCUITS. 425 cuits is low, extremely sharp tuning is obtained. The antennais tuned to th
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherwashi, bookyear1922
