242 BELL SYSTEM TECHNICAL JOURNAL 



which, using equation (21), becomes 



Zc = jXo + I -r 



\lJ Foe 



1 



1 , .^ w — coo 



^ +72 



Mo Wo . 



= Rc+ JXc 



(40) 



The experimental data may be given in terms of the values of Re and Xc 

 plotted as functions of u as shown in Fig. 34. The value of Xq is deter- 



o 



Fig. 34. — A plot of the resistive and reactive components of the impedance Zc — Re + 

 jXc, looking into a non-oscillating magnetron through its output circuit [terminals CD of 

 Fig. 31 (a)]. Note the symmetry of the reactance about the point (oio , Xo) determining 

 the value of Xo , the loop reactance. 



mined by the fact that the reactance cur\'e is antisymmetric about the 

 point (A'o , Wo). When .Yo has been determined one may determine the ad- 

 mittance, r77 , at the terminals of the ideal transformer of Fig. 31 (b). 



In terms of the circuit parameters this admittance is 



1 

 Zc — jXo 



(^)Svo.+i2r.(0"^ 



Wo 



Wo 



(41) 



