At 4/11/2008 13:43, you wrote: > > > which will provide the necessary isolation although there > > is a large segment of the forum participants that feel that > > untinned double shielded cable is vulnerable to low level noise > >....not the untinned part... the part with dissimilar shield >materials is the problem generator. In short vulnerable no, >possible PIM generator yes. > >You're preaching to the choir. I think untinned double shielded >copper is very adequate to duplexer connections. But there are >contributors aboard who feel that silver plated shields are a better >choice.
I don't think the duplexer interconnect cables are all that critical until you get to the antenna T interconnects. Everything behind that is partially filtered already. However, the cables on the T & everything hanging on the antenna port should be either solid (hardline) or silver-plated braid shielding. I've actually had plain copper-braided RG-214 coax on the antenna port of a UHF duplexer cause desense; had to replace it with silver-plated RG-214 to eliminate it. Bob NO6B
