COAXIAL AND BALANCED TRANSMISSION LINES 



301 



of a source of high-frequency voltage impressed on a divided circuit. 

 In one branch is a series resistance of 70 ohms connected to the 70-ohm 

 side of the transformer. The output of the transformer is connected 



80 



70 



60 



u 50 



CD 



(n 40 



O 



_j 



z 

 o 



30 



20 



10 



r jT 

 \ lo 



58 59 



60 



61 62 63 64 65 66 



FREQUENCY IN MEGACYCLES 



67 



68 



69 



70 



Fig. IS^Measured insertion loss of filter used on Green Harbor-Provincetown 



radio link. 



to a 17.5 ohm resistance and a high-impedance voltmeter is connected 

 across it. The other branch contains a 52.5-ohm and a 17.5-ohm 

 resistance in series, with a high-impedance voltmeter shunted across 

 the 17.5 ohms. If the transformer were a perfect transformer, the 



