490 



BELL SYSTEM TECHNICAL JOURNAL 



The quantity 



(Aoj/coo) I 



has a maximum value at Gc/yc = .433(X = 2.40), which is the condition 

 for maximum power output when tlie resonator loss is zero. 



In Fig. 11 we have a plot of Gc/jc vs. GR/je for optimum loading (that 

 is loading to give maximum power for A0 = 0). This, combined with the 



0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 



M _ Go_ 



yeQL ye 



Fig. 15. — A parameter proportional to electronic tuning range vs the ratio of total 

 circuit conductance and small signal electronic admittance. The electronic tuning 

 to extinction (Aco/a)o)o is more affected by loading than the electronic tuning to half power 

 points (Aaj/wo)f . 



curves of Fig. 15, enables us to draw curves in the case of optimum leading 

 for electronic tuning as a function of the resonator loss. Such curves are 

 shown in Fig. 16. 



From Fig. 16 we see thai with optimum loading it takes very large reso- 

 nator losses to affect the electronic tuning range to half power very much, 

 and that the electronic tuning range to extinction is considerably more 

 affected by resonator losses. Turning back to Fig. 7, we see that power is 

 affected even more profoundly by resonator losses. It is interesting to 



