If you Run a 300 watt repeater you do not need a duplexer. You Build the system with a Master site with the 300 watt transmitter in that rack you place several UHF link receivers and a voting system. then place Receivers all over the place Linked back to the master site. with a Duplexer I would Not go more than 100 watts...
repeater system --- Ron Wright <[EMAIL PROTECTED]> wrote: > Kevin, > > The one issue here is the balance of repeater to > user. A user using an HT at 5 watts even with an > outside or mobile antenna can be helped with a > repeater receiver pre-amp that would otherwise > extend receive range beyond a 50 W mobile, but allow > a low power station access. > > The repeater can make up for less desirable user > rigs. Most repeaters must deal with many > configurations of stations. > > The initial comments dealt with running high power, > 300 W, on a repeater with 50 W users. Here as you > said can help this user and balance the repeater > tx/rx coverage. > > 73, ron, n9ee/r > > > > > > >From: Kevin Custer <[EMAIL PROTECTED]> > >Date: 2008/04/15 Tue AM 07:09:24 CDT > >To: [email protected] > >Subject: Re: [Repeater-Builder] How much power > should you run through a 350 W duplexer? > > > > >Ron Wright wrote: When running only 4 cavities > this often happens even with 100 W better commercial > rigs. Running higher power does not make the > repeater hear better, often hear less, and if you > have users running typical 50W rigs why would one > need 350 W? > >It isn't impossible to have a well designed > repeater with a good preampthat has a 6 to 10 dB of > advantage over a mobile radio in a > mobileenvironment, especially on 220. Most would > agree that the 'commercialstandard' of .35 uV > sensitivity and 50 or 100 watts of power from > arepeater is balanced to most mobile situations > running similar power,and having similar receiver > sensitivity. Now, add a good preamp(something that > gives a real 6 to 10 dB of receiver sensitivity) to > awell designed repeater system and you have the need > to run 200 to 400watts to regain being balanced. > > > >A well designed repeater system will allow the > desired system powerlevel to be run without > desensing the receiver, and would hopefullyhave a > few dB of additional isolation for times that upset > the systemlike when the repeater antenna ices over. > > > >Kevin Custer > > > > > > > > > > > Ron Wright, N9EE > 727-376-6575 > MICRO COMPUTER CONCEPTS > Owner 146.64 repeater Tampa Bay, FL > No tone, all are welcome. > > > > ------------------------------------ > > > > Yahoo! Groups Links > > (Yahoo! ID required) > > mailto:[EMAIL PROTECTED] > > > ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
