The Decibel DB-4076 series is rated for 250 watts. This is the model that came from the factory in my Mastr II 100 watt UHF repeater. They made it in 2 versions, 3 cans and 4 cans, the 5 MHz split units using 2 TX and one RX, and the 3 MHz split units using 2 and 2. I find good sensitivity even on a dummy load with mine at 100 watts. But with 200 watts, I might get some desense that I don't get now. On VHF, you need even steeper skirts if running a lower split like the 600 Khz used on 2 meters. There it is even more of a case of more power on TX is not always better. In fact, for units that are at a nice high elevation with a very good radiation pattern, one can use quite a bit less power I know one repeater owner that ran his 2 meter Mastr II on the exciter alone for a while. And at about 200 Milliwatts, give or take, there was very little difference noticed. Some didn't notice at all. The design of the duplexer can make a tremendous amount of difference, plus you want the antenna system to have as good a match as possible. Also making sure the duplexer is tuned and tweaked for best results. YMMV
Wayne WA2YNE On Mon, 14 Apr 2008 15:47:37 -0500, Ron Wright <[EMAIL PROTECTED]> wrote: > Mel, > > Depends mostly on what duplexer you have. Many base type duplexer's > will handle 350 W, but at that level of TX power the duplexer might not > do enough for the receiver and cause desense. > > 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. Guess the DX and some users could hear > better. Users in noisy locations would be helped. > > 73, ron, n9ee/r > > -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
