Use to have SuperStation Masters with Rx at 450' and 150 watts Tx at 240' many years ago on this tower before it got moved. Had no desense and very good coverage. Will be running WP-641 split. Just wondering about the Rx Tx vertical separation. Would Rx at 450' and Tx at 375' be without desense with the split duplexers?
--- In Repeater-Builder@yahoogroups.com, "Jeff DePolo" <j...@...> wrote: > > > > Have chance to install a DB 224 at 450' and another one > > anywhere below it. Using LDF6 on both runs. RF solid state > > 110 watts out. Wanting to know the pros or cons of running > > both antenna close together for more height with duplexer or > > spacing antennas for isolation without duplexer? > > All other things being equal, I'd take split antennas over duplexing any > day. But I'd never connect a transmitter (or a receiver for that matter) > directly to an antenna without proper filtering. So if you're asking if > it's "OK" to just connect the transmitter and receiver to separate antennas > and let 'er rip, my answer would be no, don't do that. > > Assuming you already have a suitable duplexer, split it in half (remove the > antenna tee), and use it as two separate filters to connect to the two > separate antennas. Space the antennas some nominal amount (greater spacing > = more isolation, but also more disparity between Tx and Rx coverage), and > you'll do quite well and have far fewer issues and sources of aggrevation in > the long run as compared to duplexing on a common antenna. > > --- Jeff WN3A >
