578 



BELL SYSTEM TECHNICAL JOURNAL 



not occur. Pictures of the figures obtained on the Huorescent screen 

 were taken witli an orchnary camera with from one to three-minute 

 exposures. On most oi the pictures the horizontal and vertical axes 

 were also recorded on the screen. 



The circuits of the amplifiers dealt with and the results of the 

 analyses are graphically presented in the following figures. Amplifier 



WLT3,G[ /PATIO 

 I : U Z. 



j/v^P ruse 



ro^ 3Sa vO£.TS 



use 



o/^/ T 



FOe 130 vol rs 



use AA>IO — 



OMI T 



n3o<' Of tisoy 



Fig. 2 — Amplifier No. 1 



IN POT TI?AtiS 



VOLTACe /SAT70 



I Z74^ 



TYPC 3 



VACUOM Tt/Bi: 



S AMf; Fl/S£. 



Output t/?amj 



VOLTAGE ^ATTO 



4 • / 



SS AMf Ft/S£ 



9-^:9 



>2 *: ~ 3SOV 



Fig. 3 — Amplifier No. 2 



