Hi OH right 30w loss is not right. You maybe getting -102db notch but it is the isolation between the tx an rx ports that count, you need better than 80db. I know of some 6mtr repeaters in the UK that use the heliax duplexers and get better than -90db isolation with insertion losses a round 1.5dB. We are limited to 25w erp so usual tx in is about 25w and out of the duplexer around 20w
73 Steve ----- Original Message ----- From: "Tim" <tahr...@swtexas.net> To: <Repeater-Builder@yahoogroups.com> Sent: Sunday, July 25, 2010 10:23 PM Subject: Re: [Repeater-Builder] Re: Repeater receiver testing > Hi Steve, > > Running 80 watts into the duplexer, getting 50 out. > > Getting about 102dB notch out of the duplexers. > > From a previous thread a couple of days ago, the > consensus was that -50 was fine for this receiver. > > I hooked up my IC-706 to the TX port, and even > at 5w, I was getting significant desense. > > Figured I'd try & take one variable on at a time... > RX first. > > The RX was given to me, already crystalled & > 'tuned' up... it was a voting receiver at a multi-site > repeater. Not sure if had any 'special' modifications > done to it! > > Thanks, > > Tim > > > ------------------------------------ > > > > Yahoo! Groups Links > > >
