REFLEX OSCILLATORS 



531 



amplitude will decrease and finally go to zero when the end of the — Ye 

 line touches the V curve. If the — Ye line is rotated back, a similar phe- 

 nomenon is observed. This behavior and the resulting electronic tuning 

 characteristic are illustrated in Figs. 47 and 48. Such electronic tuning 



Mr=I 00 



Ml=1 



Ms=200 



m 0.25 



O.a.-^ 0.50 0.75 I.OO 1.25 1.50 1.75 2.00 



CONDUCTANCE, G 



Fig. 45. — Susceptance vs conductance for the same resonators as of Fig. 43 coupled 

 by a one-half wave line. The dash line indicates two other crossings of the susceptance 

 axis, at frequencies ±4% from the resonant frequency of the resonators. 



characteristics are frequently observed when a reflex oscillator is coupled 

 tightly to a resonant load. 



C. Effect of Short Mismatched Lines on Electronic Tuning 



In the foregoing, the effect of long mismatched lines in producing addi- 

 tional multiplewesonant frequencies and possible modiness in operation has 



