REFLEX OSCILLATORS 



491 



compare the effect of going from zero less to a case in which the less con- 

 ductance is \ of the small signal electronic conductance (Gr = ydT). The 

 table below shows the fraction to which the power cr efficiency, the elec- 





0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 



M _ ^ 



yeQo ye 



Fig. 16. — The effect of resonator loss on electronic tuning in an oscillator adjusted for 

 optimum power output at the center of the electronic tuning range. A parameter pro- 

 portional to electronic tuning is plotted vs the ratio of the resonator loss to small signal 

 electronic admittance. The electronic tuning to extinction is more affected than the 

 electronic tuning to half power as the loss is changed. 



tronic tuning range to extinction, and the electronic tuning range to half 

 power are reduced by this change. 



Power, Efficiency (77) 



.24 



Electronic Tuning to Extinction 



(Aw/a,o)o 



.76 



Electronic Tuning To Half Power 

 (Am/ojo) 1 



From this table it is obvious that efforts to control the electronic tuning by 

 varying the ratio — are of dubious merit. 



