From: Jim <[EMAIL PROTECTED]>: > >Gene Colson wrote: > > > And I am going to once again proclaim that with proper connectors, LMR 400 > > is as good as it gets.No more noisy that RG213. I am using it on 900 , 440 > > and VHF duplexers and assure you , there are no problems, > > Gene W7UVH > > > >Of course not-RG213 is unsuitable for duplex as well, as it is NOT >double shielded!!!
Actually, I've found that what is most important in braided-shield coax used in duplex service (between duplexer & antenna) is not whether it's single or double-shielded, but whether it's silver-plated. If moisture gets to the copper braid, it can generate a lot of noise; the silver braid seems to be more immune to this. As it turns out, most double-shielded coax is silver-plated while single-shielded silver-plated coax is rare, so there is a strong perceived correlation between the amount of shielding & susceptibility to desense for this reason. Bob NO6B Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
