GRID CURRENT MODULATION 



127 



ratio of external to total impedance appreciably but the chief defect is 

 in the comparatively low value of this ratio at the higher voice fre- 

 quencies (2.5 to 2.8 K. C), although this type of section is satisfactory 

 over the entire voice frequency range at higher carrier frequencies. 



u < 



u 



I 



2 3 4 5 6 



FREQUENCY IN KILOCYCLES 



Fig. la 



2 3 4 5 6 



FREQUENCY IN KILOCYCLES 



Fig. n 



1.0 



CONFLUENT 



BUILT-OUT 



BAND PASS FILTER 

 CHARACTERISTICS 







FREQUENCY IN KILOCYCLES 



Fig. Ic 



