xi:in\)NKS ioxi.iixixa nro la-.icr.ixci-.s .w 



In Fin- '>i is shown the iniiHiLuue lorus for tlie p.irtiiuhir network 

 niven on the diagram. The lirile is marked in terms of Zj. From 

 it, certain properties of .V nuiy lie read at onee: the resistance com- 

 ponent. R. \aries between 2('>() and 7")() ohms, and the reactance 



Fig. 3b — Components of Impedance in Fig. 3 when Z% is Doubly-Resonant 



component, X, is not greater than 245 ohms nor less than —245 ohms, 

 attaining these values when Z2 is +510/ and —510/, respectively. 



When the variation of the reactance Zz with frequency is known 

 the variation of R and X with frequency may be found by using the 

 scale on the circle. For a particular reactance network, the scale may 

 be marked directly in terms of frequency, or if it is desired to compare 

 the behavior of R andjA' when different reactance networks are sub- 



