-S80 



BELL SYSTEM TECHNICAL JOURNAL 



60 8Q 



KILOCYCLES 



Fig. 11 — Impedances of open-wire pairs of different types. 



12-inch spaced side circuit on an Alternate Arm line. This par- 

 ticular circuit was one intended for use at frequencies not above 10 

 kilocycles. In striking contrast Curve B shows the comparatively 

 smooth impedance of an 8-inch spaced non-phantomed pair on a 

 new line transposed in accordance with the J-3 system. 



