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BELL SYSTEM TECHNICAL JOURNAL 



400 

 RESISTANCE 



Fig. 3 — Graphical design of two-terminal balancing network for spiral four cable. 



Table II 

 Spiral Four Cable— 1320 Foot Spacing — 6 Milhenry Loading — Full Section Termination 



* 120 sections terminated in 450 ohms. 



and that of R^ is small at high frequencies. In this case the two functions 

 may be thought of as virtually independent. 



Table II gives the theoretical impedance of this facility and the computed 



