52 



BELL SYSTEM TECHNICAL JOURNAL 



hi 



h 



= instantaneous value of alternating component of plate current 



= instantaneous value of fundamental frequency component of 

 alternating plate current 



= instantaneous value of n^'' harmonic component of alternating 

 plate current 



= peak value of fundamental frequency component of alternating 

 plate current 

 7,^ = peak value of n*'' harmonic component of alternating plate cur- 

 rent 



u = amplification factor of tube = -— ^ 



K = h/I, 



Wq = power output in watts 



Zo = output impedance = Rq, a resistance at fundamental frequency 



Rp = instantaneous internal resistance of the tube 



Tp = differential plate resistance of tube at any point 



ACr 



tp constant 



At, 



eg constant 



