So moisture + rf = Ethernet interference. Just as originally stated. No standing waves. Is your cat5 in liquidtight? Have you played with grounding & ungrounding the shields? How about taking a garden sprayer and selectively wetting things?
Sent from my iPhone Begin forwarded message: > From: Matt Hoppes <[email protected]> > Date: April 20, 2019 at 7:52:12 AM MDT > To: Chuck McCown <[email protected]> > Subject: Re: [AFMUG] CAT5. FM. And Rain > > Yes. Problem goes away. > >> On Apr 20, 2019, at 09:51, Chuck McCown <[email protected]> wrote: >> >> Have you killed the ref when you are having the problem? Might not be ref >> related. >> >> Sent from my iPhone >> >>> On Apr 19, 2019, at 7:11 PM, Matt Hoppes >>> <[email protected]> wrote: >>> >>> 19watts >>> >>>> On 4/19/19 8:58 PM, Chuck McCown wrote: >>>> What is the reflected power when you are having problems? >>>> Sent from my iPhone >>>>> On Apr 19, 2019, at 6:41 PM, Matt Hoppes >>>>> <[email protected]> wrote: >>>>> >>>>> My thoughts too. But the reflected power right now is only 19watts out of >>>>> 9,000. >>>>> >>>>>> On Apr 19, 2019, at 20:14, Chuck McCown <[email protected]> wrote: >>>>>> >>>>>> My guess is that the FM station has a problem with the antenna or >>>>>> transmission line. Moisture throws off impedance somewhere and you have >>>>>> a strong standing wave on the transmission line. Probably a bad >>>>>> connector. >>>>>> >>>>>> Sent from my iPhone >>>>>> >>>>>>> On Apr 19, 2019, at 5:52 PM, Matt Hoppes >>>>>>> <[email protected]> wrote: >>>>>>> >>>>>>> Looking to the wisdom of the AF group on this. >>>>>>> >>>>>>> I have some equipment on an FM tower. It’s a 9kw station around 150ft. >>>>>>> We are at 250ft with two sectors and a backhaul. Netonix switch in >>>>>>> shelter. >>>>>>> >>>>>>> Nothing else on the tower. >>>>>>> >>>>>>> Normally all is fine. When it rains or is very moist out (heavy heavy >>>>>>> fog) we start having major Ethernet negotiation issues. The ports >>>>>>> will go from 1Gig to 10F sometimes. Sometimes drop completely. >>>>>>> >>>>>>> I’ve got ferrite beads wrapped about 5 times top and bottom. >>>>>>> >>>>>>> Any further words of wisdom on what to try? I suspect some odd >>>>>>> grounding issue. But not sure how to track it down or isolate it. >>>>>>> -- >>>>>>> AF mailing list >>>>>>> [email protected] >>>>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>>> >>>>>> -- >>>>>> AF mailing list >>>>>> [email protected] >>>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>> >>>>> -- >>>>> AF mailing list >>>>> [email protected] >>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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