Ladder line constructed from barbed wire, could be the best thing in ham radio since the G5RV.
Art On Wed, Apr 15, 2015 at 2:26 PM, Jorge Diez - CX6VM <cx6vm.jo...@gmail.com> wrote: > Really? They are selling that? I can find tons of this, let me know if > someone interested hi hi hi > > -----Mensaje original----- > De: Topband [mailto:topband-boun...@contesting.com] En nombre de Herbert > Schoenbohm > Enviado el: miércoles, 15 de abril de 2015 03:07 p.m. > Para: topband@contesting.com > Asunto: Re: Topband: radial wire size > > I just saw on eBay a 3' piece of barbed wire dated 1878 for sale for > $9.78 which comes up to $3.26 per foot! I guess this stuff gets more > valuable with age like some good Uruguayan wine.? > > > http://www.ebay.com/itm/Vintage-Antique-3-foot-piece-of-Barbed-Wire-Barb-Wire-Barbwire-Bobbed-Old-/121567131845?pt=LH_DefaultDomain_0&hash=item1c4df738c5 > > > Herb, KV4FZ > > On 4/15/2015 1:47 PM, Jorge Diez - CX6VM wrote: > > Hi Herb > > > > Local price: > > > > #17 $16,65 per 100 mts (328ft) > > #14 $30,32 per 100 mts (328ft) > > > > Not problem with thief actually at the farm, but will be very bad if > > after 2 years the radials "disappear" because of the corrosion > > > > 73, > > Jorge > > > > > > -----Mensaje original----- > > De: Topband [mailto:topband-boun...@contesting.com] En nombre de > > Herbert Schoenbohm Enviado el: mi rcoles, 15 de abril de 2015 01:06 > > p.m. > > Para: topband@contesting.com > > Asunto: Re: Topband: radial wire size > > > > From Home Depot > > > > > > > > $64.98 / roll > > FARMGARD 1320 ft. 12-1/2 Gauge 2-Point Class I Barbed Wire > > <http://www.homedepot.com/p/FARMGARD-1320-ft-12-1-2-Gauge-2-Point-Clas > > s-I-Ba > > rbed-Wire-317821A/202025609> > > > > > > Model # 317821A > > > > > > > > On 4/15/2015 11:53 AM, Herbert Schoenbohm wrote: > >> In AM broadcast installations the use of buried copper wire (bare) > >> smaller than #10 is considered unacceptable. Here in the Caribbean > >> cooper thieves have found radios stations a good source for black > >> market copper wire and some stations replace thier systems with > >> barbed wire which is harder to steal but very difficult to install. > >> Depending upon the soil the ability to last more than a few years he > >> use of such a solution is very questionable. > >> > >> > >> Herb Schoenbohm, KV4FZ > >> > >> On 4/15/2015 11:43 AM, donov...@starpower.net wrote: > >>> Hi Jorge, > >>> > >>> > >>> Bill is almost correct, in most soils mechanical durability is the > >>> only consideration for long term durability of copper wire, but out > >>> of sight out of mind can be a big problem for radial systems in at > >>> least two cases. > >>> > >>> > >>> Galvanic corrosion will damage a buried radial system i f small (or > >>> large!) > >>> electrical currents flow from the shield of your coaxial cable into > >>> your radial system. Of course, small diameter wire will fail more > >>> quickly than heavier wire. This is not a trivial consideration > >>> because in many installations the buried radial system has > >>> significantly lower ground resistance than any other ground in your > >>> home or in your station. You can determine if this is a problem in > >>> your installation by using a milliammeter (or a common VOM) to check > >>> for shield current. > >>> > >>> > >>> Corrosive soils may damage a buried radial system. Fortunately most > >>> soils are not corrosive for copper but there are important > >>> exceptions, some examples are: > >>> - soils with large quantities of organic matter, > >>> - poorly drained soils such as wetlands, > >>> - soils with a history of heavy agricultural use with farm animals > >>> or fertilizers > >>> - soils containing materials such as cinders or cinder blocks. > >>> > >>> > >>> 73 > >>> Frank > >>> W3LPL > >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> ----- Original Message ----- > >>> > >>> From: "Bill Wichers" <bi...@waveform.net> > >>> To: "Jorge Diez - CX6VM" <cx6vm.jo...@gmail.com>, "topband" > >>> <topband@contesting.com> > >>> Sent: Wednesday, April 15, 2015 2:27:01 PM > >>> Subject: Re: Topband: radial wire size > >>> > >>> The only real difference when using reasonable-gauge sizes is in > >>> physical durability. Electrically it makes little difference since > >>> you effectively have a large number of radials in parallel so each > >>> one carries only a relatively small percentage of the overall > >>> current in the system. > >>> > >>> I use 18 gauge bare solid copper on my radials. I use that size > >>> since I consider it a practical minimum in terms of physical > >>> durability and I can get it for around $50/thousand feet from my > >>> supplier (although they have a 5,000 foot minimum order). I've had > >>> some 60+ radials in place for about 4-5 years without any problems. > >>> Once the copper turns a dull-brown color after the first season it's > >>> almost impossible to see on the ground. > >>> > >>> A lot of people use 14 gauge since that's a commonly available size > >>> for building wire in the US. It's easy to get through "regular" > >>> (hardware store) channels and it's strong. There isn't really any > >>> electrical advantage to the heavier wire -- you won't notice any > >>> difference in performance. > >>> > >>> I think you'll be fine with the #17 wire you have access to. Save > >>> the money on the smaller radial wire and spend it somewhere else > >>> where it will make more difference in your overall antenna system. > >>> > >>> -Bill > >>> > >>>> Hello > >>>> > >>>> > >>>> > >>>> Thinking in a 4 SQ, buried radials, 60 or more on each vertical > >>>> > >>>> > >>>> > >>>> What is the difference in performance between installing radial > >>>> wire size > >>>> #14 (2.08 mm2) or #17 (1.04 mm2) ? > >>>> > >>>> > >>>> > >>>> #14 is the size that DXE sell, so I think is a good size for > >>>> radials. But what about #17? > >>>> > >>>> > >>>> > >>>> In $$$ is the half J, so want to know what I am loosing in > >>>> performance, if any > >>>> > >>>> > >>>> > >>>> Thanks in advance > >>>> > >>>> > >>>> > >>>> 73, > >>>> > >>>> Jorge > >>>> > >>>> CX6VM/CW5W > >>>> > >>>> > >>>> > >>>> --- > >>>> El software de antivirus Avast ha analizado este correo electr nico > >>>> en busca de virus. > >>>> http://www.avast.com > >>>> _________________ > >>>> Topband Reflector Archives - http://www.contesting.com/_topband > >>> _________________ > >>> Topband Reflector Archives - http://www.contesting.com/_topband > >>> _________________ > >>> Topband Reflector Archives - http://www.contesting.com/_topband > >> _________________ > >> Topband Reflector Archives - http://www.contesting.com/_topband > > _________________ > > Topband Reflector Archives - http://www.contesting.com/_topband > > > > > > --- > > El software de antivirus Avast ha analizado este correo electr nico en > busca de virus. > > http://www.avast.com > > > > _________________ > > Topband Reflector Archives - http://www.contesting.com/_topband > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > > > --- > El software de antivirus Avast ha analizado este correo electrónico en > busca de virus. > http://www.avast.com > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ Topband Reflector Archives - http://www.contesting.com/_topband