Cool, Thanks for completing the loop. The one concern I would have is that inside the 100ft section, the Ethernet cable would be 'dangling' without any support.. How did you manage to secure that ?
Regards. Faisal Imtiaz Snappy Internet & Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net > From: "Chadwick Wachs" <c...@auwireless.net> > To: "WISPA General List" <wireless@wispa.org> > Sent: Tuesday, September 20, 2016 12:10:10 PM > Subject: Re: [WISPA] Shielding FM noise with conduit? > Wanted to circle back on this with results. Bought a 100' section of metal > lined > LiquidTight at Home Depot (3/4" since I only needed 2 cables). The 100' > section > was exactly the right length to get from the antennas all the way to my > cabinet > in the machine room so now the cables are protected in the cable trays down > below as well. > Used hose clamps to attach the conduit to the tower every ~6 feet. Since I had > to make 2 90 degree turns on the way down, the flexible conduit was great. I > did pull my two Ethernet wires through the conduit while it was on the ground > - > figured that would be much easier - and it was. Cable is Ubiquiti Carrier > Shielded (the double shielded version). I also added the ends with the > grounding cable and grounded both the top and the bottom of the Ethernet to a > good ground. > Been up for about two weeks now with no Ethernet issues at all. Did not put > Ferrites on these two cables like all the rest of mine have. I still get an > occasional Ethernet packet drop or error on the Ferrited cables. So far, solid > on the two cables in the LiquidTight. > Yes, fiber is still a better long term solution but this was fairly > inexpensive > and quick and is working great. Thanks for the suggestion. > On Fri, Sep 9, 2016 at 10:51 AM, Sean Heskett < af...@zirkel.us > wrote: >> my bad, i was answering late in the evening, i was thinking PVC when you said >> EMT. EMT will work too since it's metal but it's hard to work with on a >> tower. >> the 3/4" liquidtight that you linked to will fit 3 cables. we usually run 1 >> 1/2" or 1 3/4" (i can't remember which at the moment) and you can fit 13 >> cables >> in it. we run it up to a box on the tower and then use 3/4" to run from the >> box >> to the individual APs or backhauls. we run the conduit first and then drop >> the >> ethernet cables down from the top. >> -sean >> On Thu, Sep 8, 2016 at 11:17 PM, Chadwick Wachs < c...@auwireless.net > >> wrote: >>> Interesting... Certainly easier to run. Because I have to make two 90 degree >>> turns (damn "H" shaped tower), I think I'll pull my Ethernet through it on >>> the >>> ground and then run it up the tower with cable in it. I'm guessing that >>> cutting >>> it and putting 90 degree elbows (with cable pull windows) on it is a bad >>> idea >>> from an RF standpoint? >>> My local HD has this in stock: >>> http://www.homedepot.com/p/AFC-Cable-Systems-3-4-in-x-100-ft-Liquidtight-Flexible-Steel-Conduit-6203-30-00/202262413 >>> That looks what you describe. >>> I have to ask - from a physics(?) standpoint, what keeps RF out of the >>> Liquidtight but not EMT? >>> On Thu, Sep 8, 2016 at 10:46 PM, Sean Heskett < af...@zirkel.us > wrote: >>>> If you do conduit you need to use liquidtight with the metal inside. EMT >>>> will do >>>> nothing to stop the RF from bleeding. >>>> We've done it on several towers with great success. >>>> -Sean >>>> On Thursday, September 8, 2016, Chadwick Wachs < c...@auwireless.net > >>>> wrote: >>>>> With two new FM stations moving onto the tower I am on, I need to solve >>>>> the FM >>>>> noise problem once and for all. I've been using Ferrites on each end of >>>>> the >>>>> Ethernet cable and its been pretty successful but I need to add a couple >>>>> more >>>>> antennas so I am considering conduit. >>>>> This is not my area of expertise but from what I read, it sounds like >>>>> running >>>>> conduit up the tower (only 75' for my antennas) is the best long term >>>>> solution? >>>>> My plan was to buy some 3/4" EMT in 10' sections and clamp it to the >>>>> tower from >>>>> bottom to top and run my shielded cables inside of that. >>>>> Is that the route to go? I am guessing I want to keep my service loops at >>>>> the >>>>> top of the conduit pretty short or I negate what I just did. I do have >>>>> longer >>>>> loops at the bottom in the building so my Ethernet cables are longer than >>>>> my >>>>> antenna ground wires. I'm planning on not putting Ferrites on the cables >>>>> that >>>>> are in the conduit. >>>>> Tower has 5 FM stations on it, a 900mhz paging company and two UHF DTV >>>>> stations >>>>> - along with some other 5 Ghz stuff. The FM stations are "lower" power >>>>> (250 - >>>>> 400 watts) but it sounds like those are the culprit for Ethernet issues >>>>> (other >>>>> than AM which is no where near this tower). >>>>> Thanks for the advice. >>>> _______________________________________________ >>>> Wireless mailing list >>>> Wireless@wispa.org >>>> http://lists.wispa.org/mailman/listinfo/wireless >>> -- >>> ____________________________ >>> AU Wireless (Golden Wireless) >>> www.AUwireless.net >>> Facebook | @auwirelessnet >>> _______________________________________________ >>> Wireless mailing list >>> Wireless@wispa.org >>> http://lists.wispa.org/mailman/listinfo/wireless >> _______________________________________________ >> Wireless mailing list >> Wireless@wispa.org >> http://lists.wispa.org/mailman/listinfo/wireless > -- > ____________________________ > AU Wireless (Golden Wireless) > www.AUwireless.net > Facebook | @auwirelessnet > _______________________________________________ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless
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