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:[email protected]] En nombre de Herbert Schoenbohm Enviado el: miércoles, 15 de abril de 2015 01:06 p.m. Para: [email protected] 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-Class-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, [email protected] 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" <[email protected]> >> To: "Jorge Diez - CX6VM" <[email protected]>, "topband" >> <[email protected]> >> 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 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 >> _________________ >> 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 electrónico en busca de virus. http://www.avast.com _________________ Topband Reflector Archives - http://www.contesting.com/_topband
