THE OPERATION OF VACUUM TUBES 



33 



By means of an harmonic analysis of this wave for tlie numerical values 

 indicated in Fig. 4B, the coefficients were found to be approximately 

 as follows: 



h = 0.96, h = 0.543, h = 0.140, U= - 0.07, /., = - 0.105, 



/s = - 0.043. 



The voltage produced across the output circuit by the wave, to, 

 then will be the sum of the voltages produced by each one of the com- 



2.25 



2.00 

 1.75 



1.50 



liJ 1.25 



5 1.00 



0.75 



0.25 



1.25 



5 0.25 



0.25 



60 



120 



ISO 240 



DEGREES 



300 



360 



Fig. 4 — A. Pulsating plate current wave, iy. B. Alternating component of plate 



current, io. 



