832 



BELL SYSTEM TECHNICAL JOURNAL 



12 



< 10 



=? 6 



O 2 



0.5 1.0 1.5 2.0 2.5 3.0 



PLATE CURRENT 



SCREEN CURRENT 



0.5 I.O 1.5 2.0 2.5 3.0 0.5 1.0 1.5 2.0 2.5 3.0 



PLATE POTENTIAL IN KILOVOLTS 



Fig. 11 — Characteristics of the 426XQ vacuum tube. 



