Didn't you post about this a while back? Anyway, a mobile duplexer should work OK at that power level - one of those 6-cavity flat-pack units, or a 4-cavity TX/RX mobile duplexer.
If you've got any LMR or 9913 type cable in use anywhere in the system, get rid of it and get some heliax and use RG-142 or RG-400 teflon cables for jumpers. Chuck WB2EDV ----- Original Message ----- From: "agrimm0034" <[email protected]> To: <[email protected]> Sent: Saturday, August 01, 2009 1:36 PM Subject: [Repeater-Builder] duplexerhelp or a good recomendation >I am using a UHF GMRS repeater without a duplexer on 40 ft of tower. I use >2 antennas one of a Celwave 6db gain on the top as a tx antenna, and one 15 >ft up off the ground mag mount to use as a rx antenna. The tx radio is a 45 >watt and the rx on the rx radio is .35uv sensitivity. It seems to me that I >don't have enough isolation between the antennas and often have trouble >getting through the repeater. Am I out of my mind to look into getting a >celwave duplexer or is there any other ideas's that would fit my needs? > >
