At 5/9/2008 03:42, you wrote: >On Thu, 8 May 2008, Eric Lemmon wrote: > > Most repeater builders will agree that jumpers inside the repeater > > cabinet should always be double-shielded, and that they should be > > either double silver-plated braided shields, or a flexible > > solid-copper shield such as Heli-Flex. Genuine RG-214/U or RG-142/U > > or RG-400/U cable is best, in my opinion. Stay away from > > dissimilar-metal cables like Belden 9913 and others that combine > > copper braided shields with aluminum foil. Avoid using any adapters > > or barrels. If your TX output jack is an N female and your duplexer > > input jack is an SO-239 (UHF), then you should make up a one-piece > > cable with an N male plug on one end and a PL-259 plug on the other > > end. Ideally, these should be crimp-on connectors that are > > silver-plated, with gold or silver plated center pins. The use of > > high-quality cable and connectors inside the cabinet will reduce the > > leakage between TX and RX to a very low level, which *may* marginally > > increase range due to a reduction and possible elimination of desense > > caused by TX signal ingress. > >So RG-142 > RG-213? I've got a six-foot jumper of RG-213, which I can >replace with some RG-142, but the 142 is .25" diameter and the 213 is >.5" diameter.
The RG-213 has copper braid shielding, which will eventually cause desense. Bob NO6B
