i)i:/..\y EQi'ALi/.Miox or cari<ii:i< ( irciits 



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one of these resistances. Physical resistances are added to compensate for 

 deficiencies in dissipation. The loss of the pad is made large enouj^h to 

 allow for manufacturing deviations. 



The complete schematic is shown in Fig. 14, and the equalizer with the 

 shield removed in Fig. 15. Below the panel in Fig. 15, from left to right 

 are arranged the retardation coil LI, adjusting condensers CI and C4, the 



Fig. 15 — Photograjih of carrier-frequency equalizer. 



cr>'stals Yl to Y4, inclusive, and the repeating coils Tl and T2. The fixed 

 condensers and resistances are mounted above the panel. 



Results 



Curves A and B in l*'ig. 16 show the delay-frequency characteristics of 

 the audio-frequency equalizer and the carrier-frequency equalizer, respec- 

 tively. Curve C shows the equalized delay of one terminal, which is the 

 sum of the delays of the equalizers added to the unequalized delay of Fig. 1 . 



