756 THE BELL SYSTEM TECHNICAL JOURNAL, JULY 1951 



loading coils. The standard potting complements range up to 16 coils oi" 

 terminal units. The loading units are installed at the ends of full-length 



Fig. 30 — Various stages in the assembly of toroidal type carrier loading coils. Several 

 coils mounted in their shielding containers are piled on a bench at right center. On the 

 bench at left center, an assembly of coils is being connected to the stub cable conductors. 

 In diagonal center, a completely assembled and cabled complement of 16 coils is ready 

 for placement in a tall, rectangular shaped, cast iron case. 



terminal loading sections. When short cables have only one loading section, 

 terminal loading units are used at each end. 



Building-Out Condensers: As previously indicated, building-out capaci- 

 tance adjustments are extensively required in the control of local impedance 

 irregularities, especially in the installations of the Type C loading. 



