SOME APPLICATIONS OF TYPE "J" CARRIER SYSTEM 357 



line bays. The stubs from the cable terminals at the top of the line 

 bays are carried overhead to splices on the wall. A ceiling height of 

 13 feet is maintained above the equipment but reduced along the pitch 

 of the roof to 11 feet 8 inches at the side walls. 



For all huts except that at Austin, three adjacent bays of racks are 

 needed. With these along one side wall of the hut, the opposite side is 

 available for splicing the entrance cable. At Austin an ultimate of 





Fig. 12 — Unattended repeater station. 



nine racks, for filters in both directions of transmission, led to the use of 

 racks along opposite sides of the hut with a splicing pit under the floor 

 made accessible by trap doors in the floor between the lines of racks. 

 In this case, the cable terminals are installed at the bottom of the racks 

 with their stubs dropped directly through the floor slab into the 

 splicing pit. The racks in the hut are seven feet high and a ceiling 

 height of eight feet is used. Figures 12, 13, 14, and 15 are pictures of a 

 typical repeater station, typical filter hut, and the special hut at 

 Austin. 



