272 THE BELL SYSTEM TECHNICAL JOURNAL, JANUARY 1957 



Stability of, the testing eciuipinents reduced the uccurac.y originally ex- 

 pected, but even so, changes of over 0.1 db were regarded as significant. 



Connection of Repeaters to Cable 



On board the cable ship the cable ends were prepared by making 

 tapered molded joints to 0.310-inch tail cable, sliding the domed ends of 

 the repeater up the cable and forming the armor wires round the ar- 

 mor clamps. The tapered joint included a castellated ferrule on the 

 center conductor, which, operating on the principle of the main gland, 

 acts as a barrier against the possible passage of water down the center 

 conductor into the repeater. The final assembly operation consists of 

 jointing the tail cables, bolting the armor clamps to the repeater 

 housing and screwing on the domed ends. Fig. 12 shows a completed 

 repeater connected to a cable. 



0.6 0.8 1 



4 6 8 10 20 40 60 100 200 



FREQUENCY IN KILOCYCLES PER SECOND 



400 600 1000 



Fig. 16 — Repeater loop loss measured at amplifier input. 



