5 8 antenna coil calculator download

I across the repeater portion at the upper end of the 2meter band. Courtesy of and designed by n2imf joseph r mielko this downloadable calculator will provide you with good starting measurements for a basic ground plane, inverted v or standard dipole antenna. The calculator program available for download to design this antenna is in xls spread sheet format and requires. It has gain and wave angle comparable to a fullsized ground plane antenna with radials.

It is mounted at the upper left corner of the truck bed, about one foot back from the cab. Magnetic loop antenna calculator spreadsheet excel spreadsheet that. Dipole, inverted v and ground plane antenna calculators. This type used by many, it has deserved a name on the dxantenna list over the last years. Even an automatic antenna system tuner will have trouble keeping up with a good match as the frequency and impedance drift while the antenna is melting the ice. This calculator will find the value of the long wave lw radio coil required for building a ferrite rod antenna given the value of the variable capacitor. Download the demo version of eznec and model an 8 vertical on. Im trying to build a 5 8 wave antenna out of an old cb antenna for the vhf band the problem is i cannot find out how to calculate the coil dimentions.

It appears that while the 58 wave ground plane exhibits some improvement in performance in comparison with the simpler. This calculator was adapted from the coilshortened dipole antenna calculator. Wire antenna calculator amateur radio station ws6x. Use our simple calculator to determine approximate dimensions of materials needed to build a vertical antenna. To improve the match of a 5 8 wave vertical, to 50 ohms, with a good ground, all you need is a coil between the bottom of the antenna and the coaxial inner conductor to cancel out the capacitative input. Finally, coils are the hiq components of the loaded dipole. High performance 40 meters vertical without radials. Trademarks privacy policy terms of use terms of sale privacy policy. Helical and patch antenna are directional antenna and they provide longer range but smaller angle of reception. The resource is currently listed in in 2 categories. Simple ham radio antennas a hawaiibased amateur radio antenna blog focusing on the theory, design, and use of homemade antennas. If you would rather calculate the length of a fullsize vertical antenna, see the quarterwave vertical antenna calculator. So the 58 should be the favourite choice for dxing. An efficient resonant antenna 14 wavelength or longer produces a large.

Vertical 18, 14, 38, 12, 58, 34, 78, and full wave. This shortened easytobuild vertical, with noradials, is made from surplus military camouflage poles. Problems matching a 58 wave vertical groundplane 10 meter. About antenna loading coil calculation the resource is currently listed in in 2 categories. Antenna design calculators category is a curation of 83 web resources on, magnetic loop excel sheet, parallel square conductor transmission line calculator, analysis of antenna mast strength and bending stress. Loaded quarter wave antenna inductance calculator the original javascript was created by jack ponton and can be seen here. A matching device such as a coil in series with the antenna must be used if you wish to feed it with coax. The radiation pattern is also a omnidirectional one. The main category is antenna design calculators that is about antenna design calculators. Select the calculate tabto return to the calculate window, and change the default. How to calculate how many winds you need for the loading. Shortening the stub to move the maximum vswr point higher in frequency is easy. This calculator was adapted from the coil shortened dipole antenna calculator.

Drill a 18 inch hole through each mark all the way through the pvc pipe. It is found that a five eighths wavelength vertical antenna has a gain of close to 4 dbd, i. Constructing a simple 58 wavelength vertical antenna for 2 meters. Instructions are included below for building the antenna in an example for 147. A typical base loaded 58 antenna for 2m has a coil of wire that is about 9 long, in a 1. Rf toolbox is an antenna design and electronicselectrical tool. It is physically 34 feet tall from the weatherproof box to the tuning tip at the top and is supported by a 12 foot stantionmast for a total height above ground of 46 feet. Constructing a simple 58 wavelength vertical antenna for. The correct lengths for the various models will be displayed in the chart. I used this calculator to build a dipole antenna for the cdma 450 network. Dipoles antennas are easy to build and can be very effective when placed half a wavelenth or more above ground. All you need to do is enter the desired resonant center frequency in the form below, then click calculate. Recently i was playing around with a 58 wave vertical antenna and needed to construct a matching unit.

Adding a coil in series with the antenna at the base is one such method of matching. Coil wrap calculator build your very own coils vaping. Calculating the inductance of a ferrite rodcored coil online. Im trying to build a 58 wave antenna out of an old cb antenna for the vhf band the problem is i cannot find out how to calculate the coil dimentions. Find a tube with a circumference equal to one wavelength, and wrap wire in a helix spaced a quarter wavelength. This calculator help for you to estimate the number of turns of your homebrew onelayer r.

This formula is based on a theoritical 58 wave antenna build by a wire. This calculator is useful when making antenna matching units, low pass filters, crystal sets, antenna traps, resonant circuits or anywhere where an air cored single layer inductor is required. I operate a part 15 station for my neighborhood fm and have acquired. The following program will calculate the lengths needed to construct several popular wire antennas. An antenna matching device, such a wirewound coil, must be. How come with steam engine the outcome for a 26 awg kanthal, dual coil aiming for 0,5 ohm, 3 mm diameter i get 45 watts for modsettings and with coil wrap calculator the same build gives 35. I have tried out different wire sizes,number of turns and diameters and i have got good results on the swr meter but when the antenna is up and compared to a folded dipole at the same height the 5 8 is down at least 5 or more spoints. He goes on to debunk the 58 advantage claims in his four page article. Distance from center of antenna to the center of the coil in feet must be less than half the total antenna length given above.

That coil makes the antenna look like a 34 wave electrical length, which matches to 50 ohms pretty well. In practice, it is often much easier, quicker and more accurate to resort to the above calculator instead of creating a geometrical eznec coil model. The calculator program available for download to design this antenna is in xls spread sheet format and requires that you have a program that will read xls spread sheet files. I actually tried moving the rectangular tuning strip that you solder in the first quarter turn of the helical and it gave me the minimum current draw soldered directly to the feedpoint and if i move it far from the feed point it gives me high current. Our results are optimised for gain, but others may be optimised for bandwidth. At 2m, the interwinding capacitance will make calculating the inductance very problematic, even if you knew. The coil32 program is coil inductance calculator, that computes inductors and chokes on different cores and also calculate lc circuit parameters. This does not take into consideration the type or size of horizontal reflectors, of even if there is a need for them. If the antenna is constructed by larger diameter material, its length will be shorter, due to. The mmanagal drop down menu offers 1,2,4 or 8 copies but an. The 58 wave antenna consists of a vertical radiator which is fed at the base. This idea is not new and has many names such as shell cell, cantenna, bazooka antenna, canned antenna and tin can annie.

Its just one end of my g5rv dipole, or sometimes called a dummy load. Download a copy for free to try out, for windows and macos. If you feed enough power to the antenna and with time coils will heat up and melt the ice. Once the results are obtained from this calculator, the coil can be easily modelled as a laplace load within any eznec antenna model. The 58 wave antenna consists of a vertical radiator whisc is fed at the bottom of the antenna. The measurements below are for building a simple dipole antenna.

Pay no attention to the wire goingoff horizontally from the base. Wrapping the coax around the 38 fiberglass pole about ten times was good enough to reduce the match to 1. Download antenna calculator antenna calculator is an app that takes the trouble. Antenna, ve3sqb ham radio antenna design software programs. Air cored inductor calculator m0ukd amateur radio blog. Download the ground plane dipoleinverted v calculator by n2imf. I have finally decided that you dont calculate this coilyou find it experimentally. Hf 20 meter vertical antenna description this is another homebrew antenna, for hf work. Often bought by those who have a 12 wave vertical but want to put more effort in the antenna system. This is in agreement with your formula but it does not apper to be correct. Mobile antennas, short verticals, loading coil loss,and. Oh the tubing is in two pieces and i can slide the top piece up and down.

Most of them tend to stick to vertical antennas with a 14 or 12 wave sizing. Maple leaf communications antenna calculator vertical. Loaded quarter wave antenna inductance calculator m0ukd. Choose from quarterwave, halfwave, the powerful 58wave, 34wave, or fullwave, and calculate minimum lengths of required radials, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, wire, coax, connectors, and other parts and. The coil doesnt radiate much, so the 58 wave section does the actual radiation. Helical antennas invented by john kraus give a circular polarized wave. The calculator uses bob weavers equation with round wire.

The default values are for the coverage of the lw frequency range of 148. It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength. I have tried out different wire sizes,number of turns and diameters and i have got good results on the swr meter but when the antenna is up and compared to a folded dipole at the same height the 58 is down at least 5 or more s. I havent personally tested these designs, but others have and found them to be satisfactory. You can further reduce the height of the antenna by placing a capacitance hat at the top. Free online engineering calculator to find the dimensions of a yagi uda antenna for a given frequency range and length. The 5 8 wave antenna consists of a vertical radiator whisc is fed at the bottom of the antenna. Learn how to wind your own inductor using thick copper wire for a low resistance coil. Calculations available for dipole, vertical 18, 14, 38, 12, 58, 34, 78, and. Requiring a new 2 metre band antenna for local fm simplex and repeater communication and after evaluated a couple of the main contenders for the project i settled on the 5.

To improve the match of a 58wave vertical, to 50 ohms, with a good ground, all you need is a coil between the bottom of the antenna and the coaxial inner conductor to cancel out the capacitative input. It is quite possible, that other calculators deliver slightly different results. The antenna is designed to be fed with 50 or 75 ohm coax cable of most any length with a balun. Hall, offcenter loaded dipole antennas, qst sept 1974, 2834. Most of the online calculators enable to find inductance of the coil knowing its winding dimensions and number of turns. When used as a vertical radiator against a ground plane this translates to a length of 58 wavelength. May 10, 2018 download rf toolbox an application that enables you to design and setup your own rf antenna, by providing you with a wide variety of component calculators. For maximum power transmission, 50 ohm coax cables are used to match the rf pas output impedence. This basic calculator is designed to give the aproximate length height of a. The following is a model of the current antenna system. Antenna loading coil calculation resource detail the. Total length of antenna in feet open the dipole length calculator in a separate page. This link is listed in our web site directory since tuesday dec 8 2009, and till today antenna loading coil calculation has been followed for a total of 14462 times. As seen on his page, the original formula seems to come from an article by j.

Online electrical calculator which allows you to calculate the antenna gain, impedance, diameter, space between coils, length of wire, half power beam width, beam. I wanted high efficiency 40 meter antenna with lowangle radiation. The conductor width isnt of great importance in the design. How come with steam engine the outcome for a 26 awg kanthal, dual coil aiming for 0, 5 ohm, 3 mm diameter i get 45 watts for modsettings and with coil wrap calculator the same build gives 35. This is a question i have long sought the answer to. Enter the desired operating frequency in megahertz to get a good starting length for a dipole in both feet and meters. A ground plane antenna project for 10 meters band by n4zaw. With some on air comparisons and antenna modelling there appears to be no dramatic performance advantage between for example a simple. I built a 2 meter desk top version out of foam disks and 20 awg wire.

The distance between one point to another adjacent point in a wave is known as the wavelength. This calculator is designed to give the vertical length height of a particular antenna, for the frequency and wavelength chosen. Since 5 8 wave length antenna is no longer matching the transmission line impedence, a feeding coil must be added between the antenna and the feedline so that the antenna can match the impedence of the tranmission feedline the reason for 5 8 antenna. Diameter and length of inductor are entered in millimetres along with the number of turns. Some are based on lookup tables, some completely hide their algorithms. It is inversely proportional to the frequency which means the wave with higher frequency will. I am not sure about the results of this coil inductance calculator, by using the following parameters.

They think, through wire length alone, the wire creates a low feed impedance by making the antenna threequarters of a wave long electrically. Download rf toolbox an application that enables you to design and setup your own rf antenna, by providing you with a wide variety of component calculators. How to calculate how many winds you need for the loading coil. This is remarkable, since the 58 has the lowest angle of radiation and has about 1db more gain compared to 14 and 12 verticals. In this article we will talk about helical antenna and patch antenna for fpv. Choose from quarterwave, halfwave, the powerful 5 8 wave, 34wave, or fullwave, and calculate minimum lengths of required radials, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, wire, coax, connectors, and other parts and. We often find inexperienced builders of 5 8th wl antennas think the loading coil needs to contain 18th wavelength of wire in order to make the 5 8th wave antenna a 34wl resonant antenna. This antenna has been on the truck for thousands of miles, without mechanical failure. Ham radio wire antenna calculator wire antenna calculator. Since 58 wave length antenna is no longer matching the transmission line impedence, a feeding coil must be added between the antenna and the feedline so that the antenna can match the impedence of the tranmission feedline the reason for 58 antenna. Antenna loading coil calculation the calculation method is taken from a basic program which i got many years ago from oa4ka2oig who is hereby gratefully acknowledged. In the antenna size window of the edit menu, check yaxis and zaxis. This type used by many, it has deserved a name on the dx antenna list over the last years.