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BELL SYSTEM TECHNICAL JOURNAL 



Line G was completely filled with porcelain insulators and line H 

 was a rubber insulated, lead sheathed, cable. The curves of Fig. 3 

 were derived from the difference between the observed and calculated 

 resistance in these two cases. The results so obtained are a fair 

 approximation of the leakage losses. Note that the curves are nearly 

 proportional to the frequency which is to be expected if for a constant 

 voltage the dielectric absorbs a fixed amount of energy each cycle. 



As may be expected the velocity of propagation for both lines G 



1 



•^ 2 



20 



6 6 10 12 14 16 18 20 22 



FREQUENCY-MEGACYCLES 



16 



18 



20 22 



Fig 

 Fig. 1 



O 2 4 6 8 10 12 14 



FREQUENCY-MEGACYCLES 



3 — Derived leakage conductance for the concentric tube lines G and H of 

 Line G was completely filled with porcelain insulators. Line H comprised 



a No. 18 B & S conductor with rubber insulation and lead sheath. 



