I've never used RG-6 flooded, if the material is sticky how tough is it to get a good connection to the connector??
I'm getting ready to use some and just curious what I'm getting into. Thanks Jeff, N0OST On Thu, Oct 5, 2017 at 10:44 AM Wes Attaway (N5WA) <wesatta...@bellsouth.net> wrote: > I installed 4 runs of BuryFlex through my slab and then out into the > > backyard about 15-years ago (when we built a new house) and it is still > > working fine. I have conduit through the slab (open at both ends) but the > > cable is direct buried out in the yard (about 24" deep). > > > > ------------------- > > Wes Attaway (N5WA) > > (318) 393-3289 - Shreveport, LA > > Computer/Cellphone Forensics > > AttawayForensics.com > > ------------------- > > -----Original Message----- > > From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Dale > > Putnam > > Sent: Thursday, October 05, 2017 10:13 AM > > Cc: topband@contesting.com > > Subject: Re: Topband: underground cables question > > > > must have to do with the annual rainfall. > > > > I too come from 30+ years in telco and radio comm. There are 12 runs of 6 > in > > conduit between building on one campus, and a number of others around that > > are still dry after being there for 20+ years. And the conduit, I am > > speaking of is PVC TUBE.. pretty much the same stuff that carries the > > water into your house. IF someone wants to use emt conduit, then that is > the > > description that Guy so aptly describes. NOT a good deal. AND it isn't > rated > > for water per code in the electrical code either. I have seen where > > squirrels somehow managed to work the metal conduit hard enough with the > > weather helping, to access the coax inside.. they didn't much like the > > sticky goo inside.. but that didn't stop them from eating enough to short > > the coax.. and of course Muphy made it an intermittent short. > > > > > > Have a great day, > > --... ...-- Dale - WC7S in Wy > > > > "Actions speak louder than words" > > 1856 - Abraham Lincoln > > > > > > ________________________________ > > From: guyk...@gmail.com <guyk...@gmail.com> on behalf of Guy Olinger K2AV > > <k2av....@gmail.com> > > Sent: Thursday, October 5, 2017 8:12 AM > > To: Dale Putnam > > Cc: topband@contesting.com > > Subject: Re: Topband: underground cables question > > > > Coming from an ancient Telco background which included keeping microwave > > waveguides dry for AT&T, unless you are willing to pressurize the conduit > at > > one end and allow air to exit at the other, AND insure that the air is dry > > enough to not condensate at your coldest possible ground temperature, or > run > > it with an unbroken slope to a point where water drains without pumping and > > or can be suctioned, then make these assumptions: > > > > 1) Permanent performance and very long life is desired and outweighs cost. > > If you move a lot and are putting up stuff at rental housing you probably > > need not worry. Just remember to start with new coax and cable at the new > > rental place. Throw away the old stuff. Then mark this read and move on to > > the next posting. If you think you are retiring at your place of residence, > > and if lucky want it to work without a worry for the next 30 years absent > > direct lightning strike, then read on. > > > > 2) All conduits will fill with water. That is their NATURAL state unless > you > > specifically and effectively mitigate it. At any time other than first > > installed, filled with water is their most probable state. > > > > This leaves the main usefulnesses of the conduit as > > > > a) Critter protection, and > > > > b) Cable replacement, if the conduit is large enough and water-proof pull > > ropes are left in conduit, a method of adding or replacing cables that > > avoids redigging and leaving deprecated cable in the ground. These are > > significant long-term advantages, and many find those more than enough > > reason to use them. However....... > > > > 3) Even in conduit all cables must have permanent, water-proof jacketing. > > Most cable has jacketing that is not rated for permanent submersion, meant > > for indoor use. > > > > Polyethelyne (PE) jacketed or hardline cable is really the only commonly > > available choice for coax with portions permanently submerged. Flooded is > > nice, but probably overkill INSIDE CONDUIT if the jacketing is PE or other > > permanently waterproof material. ***RG213 does NOT conform.*** Any > > miscellaneous plastics do not conform. There are cables manufactured with > > ham-uncommon materials to telephone company specifications, FOR DELIVERY TO > > TELCO, that have all the water stuff worked out just fine. But BEWARE > > knockoffs and batches for retail that mfr knows will never be sample tested > > by telco. Or for that matter cable that failed telco tests and was put on > > the retail market to recover costs. > > > > High current rotator motor leads (as opposed to control leads) should use > > the commonly available UG series direct-buriable power wiring available at > > home improvement stores. Less voltage drop, permanent and rated for wet > > environments. > > > > 4) splices or cable terminations should be made indoors and elevated where > > waterproofing failure will not allow water to get inside the PE jacketing. > > Some manufactured multiconductor cables will have BOTH external and > internal > > insulation PE or teflon. Do not locate splices in conduit. You're just > > asking for it. Even if 9 out of 10 get away with it, be assured you will be > > # 10. Murphy KNOWS all you've done, knows all the contest and DXpedition > > dates, AND has a malevolent nature. > > > > 73, Guy K2AV > > > > > > On Thu, Oct 5, 2017 at 8:49 AM, Dale Putnam > > <daleput...@hotmail.com<mailto:daleput...@hotmail.com>> wrote: > > I agree with Ken, with only one option, and that would be if the conduit is > > open on both ends.. allowing free air flow thru. That situation, MAY help > > dry the water from sitting on the cable, depending on the average humidity > > at the underground temp. Warm air from inside.. to cold air outside may not > > work out well either. > > > > > > > > Have a great day, > > --... ...-- Dale - WC7S in Wy > > > > "Actions speak louder than words" > > 1856 - Abraham Lincoln > > > > > > ________________________________ > > From: Topband > > <topband-boun...@contesting.com<mailto:topband-boun...@contesting.com>> on > > behalf of Ken Claerbout <k...@verizon.net<mailto:k...@verizon.net>> > > Sent: Thursday, October 5, 2017 6:19 AM > > To: topband@contesting.com<mailto:topband@contesting.com> > > Subject: Re: Topband: underground cables question > > > > As you have found out, it's impossible to keep water out of a conduit like > > that. I use direct bury cabling and put it directly in the ground. > Granted > > the cable is flooded, but putting in back in the conduit ensures it will > sit > > in some water, something I would try to avoid. > > > > 73 > > Ken K4ZW > > > > > > -----Original Message----- > > From: John > > <beaumo...@beaumonts.karoo.co.uk<mailto:beaumo...@beaumonts.karoo.co.uk>> > > To: topband <topband@contesting.com<mailto:topband@contesting.com>> > > Sent: Thu, Oct 5, 2017 4:11 am > > Subject: Topband: underground cables question > > > > Hi all, some years ago I buried a 4 inch conduit about a foot deep in my > > field , inside I run a control wire and a coax line RG213 to a 160 m > > vertical the feeder was a total of 5/4 wavelength long about half of it in > > the conduit, it was used as one line for a pair of verticals spaced 5/8 > wave > > apart. When first installed it worked very good but after a while I noticed > > it dropped off and I suspected water ingress. An insulation test with 1000v > > from my electricians test equipment showed indeed a fall in insulation > > resistance. > > > > So my question is I have a couple of large reels of commscope F1160 BEF > > flooded 75 ohm > > do you think I could put it in the same conduit which has allowed some > water > > in or would you make alternative arrangements . I realise it a direct bury > > coax but appreciate advice. > > > > I wish to get the two verticals going again will use 1 X 3/4 line above > > ground 1x5/4 line part in conduit and a 1/2 wave to switch in and out above > > ground. > > > > regards > > > > > > John Beaumont > > G4EIM > > > > > > _________________ > > Topband Reflector Archives - http://www.contesting.com/_topband > > Topband Archives - Contesting Online > > Home<http://www.contesting.com/_topband> > > www.contesting.com<http://www.contesting.com> > > Topband Mailing List Archives. 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