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BELL SYSTEM TECHNICAL JOURNAL 



connected in parallel through the demountable brushes, and a wire 

 which is behind the brush support, to the output of one of the antenna 

 branch amplifiers. The corresponding stator plates of the condensers 

 in a vertical row are connected together with coaxial wiring and to 

 the four terminals of an artificial quarter- wave transmission line, which 



Fig. 6 — View of second row of bays showing phase shifter drive system (left). 



