Be the hero dude...fix it and move on.. On Jun 7, 2017 6:42 PM, "Chuck McCown" <ch...@wbmfg.com> wrote:
> Helical resonator duplexers can be almost as good as quarter wave > duplexers and much smaller. > > *From:* George Skorup > *Sent:* Wednesday, June 07, 2017 5:56 PM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] Interference on a repeater at 149 MHz > > We have a local school district co-located with us on a water tower and > they're complaining about noise on their input. I pretty much told them > they're SOL until we need to add or replace cables since they're all in an > 1-1/4" PVC. So we'll have to run temp cables up, rip all the cables out of > the pipe and pull new ones. The village said we have to be in conduit. And > we do have a couple cables in use that aren't shielded. They didn't offer > to pay for it, so too bad. > > They're running a Kenwood repeater in an outdoor cabinet. Maybe 12U. > Obviously that's not going to fit the proper large can cavity duplexer like > a Sinclair. Plus they have >4.5MHz split, so no doubt that let them use a > smaller rack-mounted duplexer. > > So I'd be curious to know what the setup is on this 149MHz repeater. Are > they using a small crappy duplexer with a large split, too? > > On 6/7/2017 5:55 PM, Lewis Bergman wrote: > > I don't think so. I am assuming they probably didn't install some > connectors correctly. Unless they are using some extremely crappy gear the > RF portions of all half decent repeaters are shielded very well. Unless > they modified the repeater leaving some shielding off the connectors are > the most likely source. I guess there could also be punctures or some such > in the coax as well. > > On Wed, Jun 7, 2017 at 5:51 PM Jaime Solorza <losguyswirel...@gmail.com> > wrote: > >> Lewis. You are assuming the VHF gear was properly installed...few folks >> do right first time... someones laziness or lack of knowledge is another's >> opportunity to make some cash >> >> On Jun 7, 2017 4:41 PM, "Lewis Bergman" <lewis.berg...@gmail.com> wrote: >> >>> Has anyone checked their connectors/connections between all RF points? >>> Antenna to cable, cable to duplexer, duplexer TX/RX to repeater. >>> >>> Most of the time I have seen Two Way equipment either be interfered with >>> or interfere with someone else it is a connector issue. The only other case >>> I have seen issues should be able to be determined by an intermod study. I >>> doubt it has anything to do with intermod. My bet is a faulty connector. I >>> would assume it is the RX side so I would check the RX Repeater port to the >>> RX port on the duplexer and then the rest of the connectors. >>> >>> Not saying it can't be the the CAT5, just that if all is good on the >>> antenna system I haven't ever seen an issue and I have a lot of sites with >>> both two way and 900, 2.4, and 5GHz operating on all kinds of speeds both >>> POE and not. >>> >> >
