You may take a spectrum analyzer to the site and see what the noise floor is at. Get the spec for the repeater what the isolation needs to be and measure what your antenna is seeing. Look at adding more band pass cavities to the transmit and receive. Look at adding an isolator on the transmitter. These mite be the steps to take before you want to move. Now if there is a site that is quiet and you can get without all the politics I would go for it providing it covers where you need the coverage.
Mike K7PFJ _____ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of John Barrett Sent: Friday, October 03, 2008 12:53 AM To: [email protected] Subject: Re: [Repeater-Builder] Vertex vs. Kenwood my question exactly -- if the new site is quieter and you had the duplexer cranked back (insertion loss increased) to get better isolation, you may may even be able to open it up a little and get some additional receive sensitivity... other than that, why change what works unless there are significant issues with the old gear. I'd be looking at it as a chance to go over the entire system and fix any minor problems like old/stressed coax, oxidized connections, etc.. make sure its going to work trouble free for another 3 years. MCH wrote: > > I'm still trying to comprehend why you would need replacements just > because a site is more quiet. If they work at the crowded site, they > should work fine at the quiet one. > > Joe M. > > [EMAIL PROTECTED] <mailto:scomind%40aol.com> com <mailto:scomind%40aol.com> wrote: > > Hi All, > > > > My club has some 3-year-old VHF and UHF Vertex repeaters at a high-RF > > site. A possible deal would move them to a much quieter site, and if > > that happens we'll need replacements. > > > > Members of this list have consistently shown a preference for Kenwoods, > > and it appears both brands are priced about the same. However, I'm > > concerned that much of what has been posted falls into the true > believer > > category, and this decision must be based on technical data. How about > > it, RF gurus? If you have facts, please spill 'em. > > > > Thanks! > > > > 73, > > Bob, WA9FBO > > > > > > > > ---------------------------------------------------------- > > Looking for simple solutions to your real-life financial challenges? > > Check out WalletPop for the latest news and information, tips and > > calculators > > > <http://pr.atwola. <http://pr.atwola.com/promoclk/100000075x1209382257x1200540686/aol?redir=htt p://www.walletpop.com/?NCID=emlcntuswall00000001> com/promoclk/100000075x1209382257x1200540686/aol?redir=http://www.walletpop. com/?NCID=emlcntuswall00000001 > <http://pr.atwola. <http://pr.atwola.com/promoclk/100000075x1209382257x1200540686/aol?redir=htt p://www.walletpop.com/?NCID=emlcntuswall00000001> com/promoclk/100000075x1209382257x1200540686/aol?redir=http://www.walletpop. com/?NCID=emlcntuswall00000001>>. > > > > > > > > ---------------------------------------------------------- > > > > No virus found in this incoming message. > > Checked by AVG. > > Version: 7.5.526 / Virus Database: 270.7.5/1703 - Release Date: > 10/2/2008 7:46 AM > >
