There's should be more in your question. Are they going to be tower mounted where they will be directly above and below the other. That's very important. If so I'd say at least 70'-100' of vertical separation but if your not running hardline with no filtering whatsoever you will still likely have problems with desense just through the coax feedlines.
If the separation isn't exactly vertical say on two towers on a site. Even with one antenna at 50' and the other is at 200' the towers would need to be hundreds, maybe thousands of feet separation. A pair of simple pass cans could give you what you need for isolation. No UHF Moto cube cans lying around??? Also you can try more of a split just for testing. 435rx 449tx say. Ross kc7rjk -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Steve Sent: Wednesday, June 02, 2010 2:30 PM To: [email protected] Subject: [Repeater-Builder] Antenna Separation UHF Low Power I am looking at putting together a 5w uhf repeater using 2 uhf m200s and a Rick we have on hand. We want to do coverage tests prior to investing in a duplexer, how far apart do we need to place our antennas?
