910 THE BELL SYSTEM TECHNICAL JOURNAL, JULY 1953 



50 



30 



o 10 



z 



z 



-20 



-30 



300 



200 O 



aOI 0.02 0.05 0.1 0.2 0.5 1.0 2 5 10 20 50 100 200 



FREQUENCY IN MEGACYCLES PER SECOND 



Fig. 16 — T4, return ratio of lower triode. 



0.35 



0.30 



0.25 



S0.20 



UJ 

 Q 



2 0.15 



«0 



^ 0.10 



tc 

 o 



z 



- 0.05 



z 

 < 



-0.05 



0.2 0.3 0.4 0.6 0.8 1.0 2 3 4 5 6 8 10 



FREQUENCY IN MEGACYCLES PER SECOND 



Fig. 17 — Mu beta efFect, amplifier gain change for a one db decrease in each 

 transconductance. 



