Winter has come and is on its way out. I had a 1/4 mile roll of #14 gauge electric fence wire. I was about to make an attempt to finally get on the Top Band, with the building of the giant 160 meter dipole. Bring it on!
I’m going to tell you that it was a job getting this long dipole antenna up in the air. One leg wasn’t so bad; the other one was through the brush with small trees. Ouch! While I am using aluminum electric fence wire, I acknowledge that bare wire will cause havoc if it touches any limbs or branches. Snip snip…
The roll of fence wire was heavy (bad back here) as I measured my cut for 1900 kHz and rolled it out. Each leg was to be 123 feet. Multiply this times 2 and you get 246 feet of wire hanging in the air. This is a lot of wire to manage and the #14 gauge is very stiff. It should take some weathering I’m hoping. And 1/4 mile of wire will make a lot of antennas. I know that there are many critics of the aluminum fence wire.
Surprisingly enough, the silver wire is nearly invisible hanging in the sky.
I prefer the copper wire that has a plastic coat on it, but this would have costed about $100 to build the 160 meter antenna alone. The price of the aluminum electric fence wire was about 1/3 of that and I walked away with 1/4 mile of wire, instead of enough for one antenna only. I thought it was quite a bargain.
The 160-meter band is mostly a wintertime band from what I gather. And then it is only a nighttime band at that. Most hams will not even respond to you unless you have an amplifier on this band. I later found out that a long wire like this is a monster to keep tuned. I’m not sure if this is the aluminum wire or just the nature of the long wire. I understand why many hams completely avoid the 160M band.
The other HF bands are much easier to operate and the antennas require a lot less real estate. The propagation for this band is complicated. Here we go.
I thought that the fence wire performed almost as well as the copper wire. I am used to working with the copper. Copper is hard to beat for playing radio.
The characteristics of the 160 meter dipole is interesting. It plays fantastic on 80 meters. It plays very fair on 40 meters. Even on 20 meters and 17 meters, receive was surprising.
And of course on 160 meters I could now actually hear the QSO’s with decent signal quality. I worked seven or eight different states on this antenna with only 100 watts, but as the QRN rolled in for the night it became too much of a challenge. Boy is it ever noisy. Noisy, noisy, and noisy.
The Top Band is another experience altogether. There is more space in the basement but it still occasionally gets crowded, believe it or not. I found quickly that a microphone with a little bass is advantageous in the thick QRN.
Well, almost time for the aurora and better propagation for the higher bands. On to another antenna project. Happy DXing!
2 Responses
Another Look At The 160 Meter Dipole | KI4KQD BLOGGER
July 14th, 2013 at 4:29 pm
1[…] posted in February about The 160 Meter Electric Fence Wire Dipole and I am going to take another look at this HF antenna. I have made some changes in my arrangement […]
Anjali
July 26th, 2015 at 1:10 am
2For a ground plane vatcirel to work correctly they need to be mounted above a conductive sheet or metal or a radial network.This metal sheeting is called the ground plane’.If your house roof is made form metal roof sheeting , then this can be used as a ground plane surface , just in the same way it is used in a car antenna installation.This is not however possible if you wish to raise the antenna base away from the surface of the sheeting , eg , on a pipe mast support above your roof.If you want to get the antenna up on a pole you MUST replace the ground plane with radials.Radials are wires connected to the base of the antenna and are approximately 1/4 wavelength long.Typically they are angled slightly down for impedance matching purposes , which also makes them handy in some applications as guy wires.Up on a pole you don’t have as bad an effect called earth losses’ . this means that 4 radials may be all that is required to get the antenna to perform well. (but more the merrier)Now if you mount your antenna at ground level the losses force you to use a considerably more amount of radials.AM band broadcast stations use 120 radials ..!!!!!Typically though no appreciable gain can be seen after you get past 20 30 or so radials.The result of using less radials than required is poor radiation efficiency.4 radials just wont cut it in this situation.That all means that with a poor radials system ,. you have more wasted power , by comparison to a good radial system.Another disadvantage of using a ground mounted antenna is signal obstruction due to buildings and trees etc.Not only will these drop the strength of your incoming signals , but they also absorb your outgoing power, which means again , less overall effectiveness from the antenna.Ground mounted vatcirels can work well ONLY’ , if they are mounted in the clear and ONLY’ when used against a suitable ground system.Saying this , the fact is , most attempts of ground mounted vatcirels for CB fall far short of the requirements and often perform poorly.
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