FLEXIBLE REPEATER MANUFACTURE 



129 



J FMAMJJASONDJFMAMJJASONO 

 1954 1955 



JFMAMJJASOND 

 1956 



Fig. 8 — Inductor yield. 



methaciylate parts, and handling those inductors having long delicate 

 leads, were the most troublesome items on this apparatus. Fig. 8 shows 

 manufacturing yield for inductors. 



Networks combined several codes of component apparatus, such as 

 a mica and a paper capacitor, resistor and an inductor. Six networks 

 were used in each repeater unit consisting of two interstage networks, 

 an input, an output, and two beta networks. They demanded a most 

 delicate wiring job in that stranded gold-plated copper wires had to be 

 joined in a small pocket in methyl methacrylate, where a minimum 

 amount of heat can be applied; otherwise the methacrylate is affected. 

 After soldering, a minimum amount of movement of the stranded wire 

 was permitted, inasmuch as the soldered gold-plated copper wire be- 

 comes quite brittle. 



Repeater Units, are wired assemblies consisting of seventeen sections 

 in which there are six networks, three electron tubes, one gas tube, one 

 crystal, three high voltage capacitors, one dessicator and two terminal 

 sections. The successive build-up of these materials left little chance to 

 make a repair because a splice in a lead was not permissible. It is during 

 this assembly stage that a repeater received its individual identitj^ be- 



