KENNELLY. — EQUIVALENT CIRCUITS OF COMPOSITE LINES. 61 



receiving apparatus is short-circuited. For example, in the case of 

 Figure 4, if we short circuit the receiver Z r the receiving-end impe- 

 dance of each line is 6,736.96/156° 51' 15" ohms. With the receiver 

 7i r inserted, the receiving-end impedance is considerably changed, and 

 this is the condition met with in practice. By applying half the im- 



.+ + ,+■ 

 ^mnm — 



0,= 2 



\=. 1000' 



BJC 





Z. =.2000" 



: loo" i'a 



e l = 2 



BC 



a = t-5" DiEft^ 



3^ = »ooo* 



z t = aooo" z^zsoo" 



— rr- — ;F 



'o-9nst)cio; 



O-W9JT6XI0V. 



G G G' 



Figure 10. Three-section composite line with a terminal impedance load. 



pedance of the receiver as a terminal load to the line, the architrave 

 of the new equivalent l~l gives the receiving-end impedance with the 

 receiver included. If this is the result sought, it becomes unnecessary 

 to compute the values of the leaks of this l~l . 



Equivalent n . First Method. 



Figure 10 represents the three-section composite line of Figure 8, 

 with a terminal impedance of 100 ohms applied at A. To compute 



