Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

184 FREQUENCY MODULATION, Volume Iseries-inductance elements each have a reactance equal in value to R.In a previous analysis of this circuit, 3(1) /i and I 2were equal in magnitude.(2) I x leads I 2 by ninety degrees.it was shown that(3) The input impedance of the total circuit is a pure resistanceof R ohms.The first condition, equality of the two currents, is evident from aninspection of Figure 4(c). A vector diagram of the currents and thedriving voltage is shown in Figure 4(d), and helps to show the quadraturerelation as well as the fact that the input impedance isresistance.a pureA complete single layer of a turnstile combination is shown inFigure 5. Here the East and North radiators are fed from one con-