Antenna is speaker wire. The step by step technique and materials needed are as follows:. Measure and split the wire at the three-foot mark. From the end of the seven-foot length of speaker cable remaining, peel away the insulation of two inches.
Then put the wire to a loft location. You can use a small nail to finish it and add support for the wire.
Run the two wires in opposite directions outside the window. Put a nail at the tail of the two wires for support. There are many different types of antennas that can be used for FM broadcasting. However, most people use either 75 ohm coax or ohm twin lead. A ohm antenna is more resistant to interference than a 75 ohm antenna and it is often preferred because they have lower loss rates.
It is best to have a speaker wire of 6 feet in length. You would have a naked wire. Tie up the wire around the antenna or put the wire in the aerial hole.
Keep the wire flat in any spot and hold it on the wall with tape. And keep about a foot of wire over the tape.
Then spread the two separate parts of the wire to the point of the tape. And pin them to the wall with tape. You probably have your antenna near a window, which can interfere with frequencies. Try moving it to see if there is better reception by placing it higher up and away from the interference. If you are using an indoor antenna try not to put it too close to a material like plaster or brick that can interfere with radio waves.
The outer conductor is called the shield and it provides protection for the inner conductor. It also helps to reduce interference noise from nearby cables or other sources. The center conductor is wrapped in an insulating material which then gets covered with a metal sheath that has connectors on either end. This kind of cable can transmit data at high speeds without any loss due to electromagnetic interference, making them perfect for modern digital communications like Wi-Fi and 4G LTE signals.
Adding wires to the aerial leads would help make the results better and increase the aerial outside height. The ohm antenna is also known as the F. It has an upgraded reception over many other devised solutions that you can use. The FM dipole antenna is easier to make. Stranded copper or copper clad aluminum are the most common - copper clad aluminum is somewhat stronger and has the more conductive copper on the outside, where the current is concentrated.
Stranded wire is ideal for flexibility and ease of soldering and crimping. Here is an answer for the European hams among us. Printable copies are available from my web site. There happens to be a lot of fuss out there about antenna wire.
Most amateur radio shops sell "special" antenna wire at unreasonably high price, whilst most of the claims made about these wires are untrue. The situation reminds me a bit of the many loudspeaker cable myths. However, for those living in Europe, a less expensive and even better alternative exists. Rather unfortunately, this harmonisation code did not foresee a means of specifying the property of being "tinned". So, make sure to specify "tinned" when ordering this wire!
Below spec links list all available wire sizes. Keep in mind that at radio frequencies the skin effect greatly reduces the current carrying capacity of any wire. Additional benefits of this wire gauge are its greater breaking strength and a slightly broader VSWR bandwidth. The tinned-copper braided strands are what make the wire so extremely flexible.
The tin around each of the copper strands makes soldering the wire a breeze and, moreover, prevents the copper from oxidizing, especially in salty coastal environments. After all, VOBst wire is designed for use in bathrooms and on board of ships. Nevertheless, I always make sure to cap the wire ends with a dot of solder and clear glue to prevent moisture from entering through capillary action.
It is better to be safe than sorry! The 0. The 4nec2 internal manual mentions a range of 4. The actual value for a particular sample will depend on the amount of softener used in it; more softener will result in a higher permittivity. Most of NECbased antenna modelling programs e. Please, refer to their respective user manuals for more information.
I have been operating my antennas for many years now without any issues despite some severe weather, salt and strain exposure. Of course, be sure to leave some sag when hanging up wire antennas. Check out Owen Duffy's, VK1OD, antenna wire catenary calculator to know how much sag would be required for your particular application.
I am not selling this wire! If you are living in Europe, the good news is this wire can be ordered from your local electrical supply store. It is normally deliverable without much delay. VAT and m of the lighter 2. Be sure that the wire that you use is acceptable legally as well as physically. For people in other parts of the world that is equivalent to 1. It is noting that twin feeder, such as that formed by the flex does not perform well when routed for long lengths through a house and signal losses will rise - better to use coax as this is not affected in the same way.
When installing the antenna, as far as is possible in a roof space, the antenna should away from metal objects as this will reduce the signal levels. In particular the ends of the antenna are more sensitive to nearby metal objects.
We strung our antenna up in the loft or roof space. As many VHF FM stations use vertical polarisation these days, we mounted the dipole in a vertical fashion: one end attached to a convenient nail in the wooden constriction of the roof, and the other end held down by a weight.
The coax was lead away at right angles - as much as you can in these circumstances! This input will normally have screw terminals although they will sometimes have a special ohm connector. It requires only the use of a length of ohm ribbon cable not the computer multi-stranded ribbon cable which can be bought from most electronic component stockists. The first stage is to cut a length slightly longer than that required for the dipole element. At either end the centre plastic should be cut back and the remaining wire on either side stripped and joined together.
This should be done making sure that the overall length of the element is correct. The next stage is to cut the bottom wire in the centre. The wires should be stripped back so that a second length of ribbon can be attached.
This can be made any suitable length, bearing in mind that it is likely to introduce a reasonable amount of loss if it is run within the house close to other objects. This enables the ribbon to be used as feeder to be connected. This may be any suitable length. This cheap and easy VHF FM dipole antenna is suitable for areas with high signal strengths, or it may be used as a temporary measure.
The ribbon cable is generally clear and can be hidden quite easily. Often this type of aerial can be fixed behind a curtain rail or a large piece of furniture. The FM dipole antenna can be a cheap and effective solution, and they can be made in a variety of forms - only two ideas are given above, but it is possible to make a VHF FM dipole antenna in many more ways according to what may be available and what the requirements are.
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