There have been several references, in recent postings, to the need for double-shielded coaxial cable when hooking up components within a repeater cabinet. Although RG-142/U is widely used by repeater builders, perhaps a better choice for some applications is RG-400/U. At first glance, RG-142/U and RG-400/U appear identical, with see-through brown jackets, but there is a significant difference:
RG-142/U has a solid steel center conductor that is silver plated. RG-400/U has a stranded copper center conductor, with each strand being silver plated. Both types of cable have double, silver-plated copper braided shields, and a Teflon dielectric. Both types have similar RF characteristics. Because of its flexibility, RG-400/U is better suited for bench test leads or to connect any repeater component that is mounted on a movable panel or on the inside of the cabinet door. When flexed repeatedly, the steel center conductor of RG-142/U can fracture and become a noise generator. 73, Eric Lemmon WB6FLY Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
