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BELL SYSTEM TECHNICAL JOURNAL 



46. Phase Relations. Typical phase relations between the various 

 currents and voltages in the oscillating circuit are illustrated by the 

 oscillograms in Fig. 55. Note that the oscillation current I , and 

 also E p and E g show practically sinusoidal variations. Such variations 



Plate Voltage 



Grid Voltage 



Plate Current 



Grid Current 



Oscillating Current 



Plate Current 



Fig. 55 



will be found over very wide ranges of adjustment. Although I p does 

 not show a sinusoidal variation, the fundamental component (whose 

 frequency is the same as that of I ) is relatively much larger than 

 the higher components. 



Note that the variations of E p and E g are practically 180 out of 

 phase, and also that E p and the fundamental of I p are 180 out of 



