Hi, We screwed the sections together with sheet metal screws before putting up on the tower.
73 John, W3ML --- In Repeater-Builder@yahoogroups.com, "WA3GIN" <wa3...@...> wrote: > > Hi, > > First thing. Remove the preamp. Those things are only useful after you have > a tight working system. Otherwise they can pick noise and that is all you'll > hear. To get started, start simple. > > Be sure the antenna is tight. We use the G7 and found one that came loss at > the place where the sections screw together the symtom is crackly noise on > all signals. Probably won't see it on SWR meter. > > Good Luck, > dave > > > ----- Original Message ----- > From: jmp46534 > To: Repeater-Builder@yahoogroups.com > Sent: Sunday, September 06, 2009 2:36 PM > Subject: [Repeater-Builder] De-sense question > > > Hi, > > I have read the large majority of messages on here and the Repeater > builders site, and I am still lost. > This is the first time I have worked with a repeater in my 30 year ham > career and am learning something new everyday.. > > We installed a GE Mastr II running into pre-amp, a BandPass and then a 6 > can duplexer. The antenna is Hustler G7-144 and 1/2in hardline up 65 feet. > > The duplexer was set up with service monitor at the test site prior to > installing it here. > > When I go above 10 watts out all we hear from the users is a lot noise and > very little voice. As the power goes higher (when radio heats up) the noise > gets so bad that we can not make out a thing the people are saying. > > The SWR between the radio and the duplexer is 1.1 at 5 w and 1.15 at 7.5 > watts. Of course as we go up in power to 20 watts out we have 1.3 SWR. > > On the antenna side of the duplexer the SWR goes up to 1.4 at 20 watts and > 1.2 at 7 watts and very little at 5watts (meter hardly moves). > > I am thinking it is either the hardline or connectors and/or antenna. > > The antenna and hardline are used. The connectors despite being new are > very hard to put on. The guy that installed them even had to use pliers on > the tower to attach the connector up there and I have to use pliers to get it > tight on the duplexer. > > Any suggestions on how to fix this? > > Thanks and 73 > John, W3ML >
