Return loss of No. 19-H-174-63 phantoms exceeded by various 

 percentages of circuits at 1000 cycles 



Smooth curve — theoretical 

 25-H-l 74-63 phantoms Pittsburgh to IJgonier 

 H 21-11-174-63 phantoms Ligonicr to Pittsburgh 



60 



55 



50 



45 



if) 

 8 30 



25 



10 20 30 40 50 60 70 80 90 (00 

 Percent of Circuits 

 Fig. 13 



kiturn loss of No. 19-H-l 74-63 phantoms exceeded by various 

 percentages of circuits at 2000 cycles 



Smooth curve — theoretical 

 25-H-174-63 phantoms Pittsburgh to Ligonier 

 r»1 21-H-174-63 phantoms Ligonier to Pittsburgh 



60 



55 



50 



D 40 



g 30 



g 25 



>S» 



"^-^ ^' a^ 



10 20 30 40 50 60 70 80 90 100 

 Percent of Circuits 

 Fig. 14 



