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BELL SYSTEM TECHNICAL JOURNAL 



A three-inch length of No. 18 wire was inserted as shown in the lower 

 picture of Fig. 5 and " Experimental Curve 2 " resulted. This reduced 

 the irregularities in the input impedance to about half, so another three 



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 FREQUENCY IN MEGACYCLES 



Fig. 6 — Lower. Experimental input impedance characteristics of 300 ohm line 

 with terminations shown in Fig. 5. Upper. Input impedance characteristics of 

 50-meter 600 : 300 ohm line of No. 6 conductors. 



inches were inserted, resulting in "Experimental Curve 3." Here the 

 maxima and minima are displaced, indicating that the effect of the 

 stray capacitance has been reduced to the same order of magnitude as 

 that due to the deviation of the resistance from the desired value. This 



