A short video showing two of my homemade yagiuda antennas for 70cm. Yagi calculator is a windows program that also runs well on linux. For the complete 2mdata see the 5elementultralightyagi. The main category is antennas projects for 432440 mhz that is about antenna for 70 cm 432440 mhz. The following text contains some basic yagi design concepts aimed toward. Yagi calculator 7 october 2019 improved operation with two monitors and resizing download yagi calculator version 2. The dl6wu yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a. Some are based on lookup tables, some completely hide their algorithms. If you want to put this thing outdoors, do not use brass, as it.
Stacking antennas, placing a 70cm yagi between a 2m stack. Below is a javascript that i wrote in order for you to quickly calculate the dimensions for a seven element yagiuda antenna. Antenna design calculators category is a curation of 83 web resources on, parallel square conductor transmission line calculator, analysis of antenna mast strength and bending stress, full wave loop antenna calculator. About 70cm yagi antennas the resource is currently listed in in a single category. Also, it makes an excellent school, club or boy scout project.
The yagi has a unique element called a open sleeve which is a director very close to the driven element. Putting a large 11el 6m yagi with a 50 boom on the lowest position on the mast just a few inches above the tower top. I do realize that this is not an optimum design, but it did help me to put out a very good signal on 2 meters. For the love of physics walter lewin may 16, 2011 duration. Yagi calculator is a program build to produces dimensions for a dl6wu style long yagi antenna. Cheap yagi for 70 cm build this cheap and easy satellite.
I like to use the basic dl6wu wideband yagi designs whenever possible. Office tools downloads yagi calculator by john drew and many more programs are available for instant and free download. The calculators for other antenna types such as parabolic,horn,dipole and patch are also mentioned. Just like my continue reading 3 elements yagi 70cm lightweight end mount. Enter the desired frequency then click on calculate and the optimum values for that combination will be displayed in feet, inches and fractions of. This software can not only be used to design but also to find out antenna gain, stacking distance, and standing wave ratio swr to design the antenna, you need to go to task design yagi menu. Yagi uda antenna calculator you may want to combine it with a folded dipole. A computer optimized uhf 70 cm yagi antenna for radioamateurs, transmitting and receiving on 420 mc 430 mc 440 mhz to 450 mc with this beam in high gain. With yagicad it is possible to enter a base design from scratch or use one of a number of saved well known designs.
Since my article on simple wideband yagis appeared in september ar i have had a number of people contact me advising that it would be better to use the grey electrical conduit rather than the orange version i did. This antenna features 21 elements on a 14 12 foot boom and provides excellent gain and fb performance. Long yagis are commonly used from the 144mhz amateur band to the 2. Dont forget the driven element red is cut in the centre. The yagi is optimized for the cwssbparts of the bands, but usuable for the full bands. The amsat sa 2 m 70 cm dualband yagi antenna is now. Build a 4 elements yagi dw1zws panda antenna original. Yagi calculator is a free antenna design and analysis software for windows. Build a 70cm band yagi for amateur satellite tracking.
This page covers 3 element yagi antenna calculator. Building a high performance 3 elements lightweight end mount yagi antenna for 70cm uhf band centered at 435 mhz. Virtually no ham antenna article today lists all the materials, tools and speci. The boom, plastic inserts are all from a broken tv antenna. Displays answers of loan amounts, interest rates, terms in months. Simply enter the freqency in megahertz and the script will do the rest. It is quite possible, that other calculators deliver slightly different results. Ive taken what i learned from the gmrs continue reading homebrew 5 element vhf yagi. Then was going to mount one of the 2m yagis 5 feet above the 6m yagi. I had also wanted to put a 70cm long boom up there too.
The formula and basics of yagi antenna calculator are also explained with example. I decided to build the simplest of our four yagi antenna first the m2 antenna systems 44021 atv. If you decide you really need a yagi with more elements, here are the lengths of them. It is not necessary to understand all the terms and theories described to buildread more. The dl6wu antenna provided a significant boost to vhfuhf operators using. Diameter of parasitic elements mm diameter of boom mm is the boom isolated from parasitics. The optimum stacking distance between the two 2m5wl yagis is 10 according to the specs. When operating on 70cm the open sleeve acts as part of the driven element on 70cm third harmonic of 2m. Yagi calculator this is where you input the center frequency in megahertz. The most interesting part of the software is, it can help you to improve your design by projecting the antenna radiation pattern and estimating the radiation resistance. Center of boom has no element and makes for easy mounting.
A good design tool for this is the yagi calculator written by vk5dj. Simple wideband yagis for 2m and 70cm errata and extra pictures. Antenna calculator calculate your dipole, 3 element yagi etc find the length of a dipole. Yagi calculator, free yagi calculator software downloads. The dl6wu yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a useful pattern. Use our simple calculator to determine approximate dimensions of materials needed to build a 3element yagiuda antenna, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, coax, connectors, and other parts and accessories for amateur radio and other radio applications. Calculator software yagi gematria numerology calculator software v.
This 50ohm impedance antenna, when fed with 25100w of ssb rf at 435mhz, makes reaching amateur satellites such as ao40 and ao10 a snap. Directly fed with 50 ohm coax must decide where the balance point is for mounting. The separation will remain the same for all the elements and the lengths of these extra directors will all be the same as the 1st director. The best yagi uda antenna modelling software today i want to share with you a great yagi uda antenna modeling software for amateur radio operator and enthusiast. Pg1ns ham radio site 70cm projects directional antennas. I elementsthe yagi antennas basic design is a resonant fed dipole the fed dipole. If there are some decoding mistakes, this software may offer unexpected results. The below image is the measurements of the antenna. Use this calculator as a tool to understand and planning of your yagi antenna.
This link is listed in our web site directory since friday aug 25 2006, and till today 70cm yagi antennas has been followed for a total of 15723 times. Uhf yagi is based on dl6uw yagi antennas designformula. Simple wideband yagis for 2m and 70cm errata and extra. Yagi calculator software free download yagi calculator. Calculator 3element yagi maple leaf communications. Long yagi are commonly used from the 144mhz amateur band to the 2. Now its time to step it up just a little bit and fabricate a bigger antenna. This calculator is designed to give the critical information of a particular beam antenna, in this case a seven element yagi, for the frequency chosen. Its a scaled down version of the 144 mhz ultra wideband yagi produced by rutland arrays. Yagi with 5 elements on 2 m, 8 elements on 70cm and one feedpoint. An application designed to generate data for the construction of long yagi antennas for vhf and uhf use. Yagicad is a fully integrated analysis and design package primarily intended for vhf yagi aerials. Heres how to make one using basic hand tools and readily available materials. This page shows a 7 element, yagi beam antenna built out of spare parts for the 70 cm band.
In my page you will find several details of manufacture, additional. One elcheapo actually free wooden 7 element and a much better built 10 element. Yagi calculator download it performs the calculations needed to. This design can then be optimised or scaled to suit particular requirements. To be combined with a yagi uda antenna or used as is. Dl6wu style yagis for vhfuhf updated 7 october 2019. Free online engineering calculator to find the dimensions of a yagi uda antenna for a given frequency range and length. Yagi calculator is a windows program that also runs well on linux, ubuntu 8. In this menu, you need to submit values of multiple. A thorough reading and understanding of the other sections are necessary to comprehend all the terms used on this page. Here are the specifications for the m2 44021 atv yagi courtesy m2 antenna systems website. Figure 2 shows a screen shot of an example 70cm dl6wu yagi design in inch. Cheap yagi for 70 cm build this cheap and easy satellite downlink antenna by richard f. The picture above is a 5element 70 cm quagi is constructed from 116.
Polar plots, gain tables etc, from yagimax antennadesign program. Since then we have become the largest manufacturer of amateur, cb, and scanner antennas and accessories in the uk we are also the largest local authorised dealer for alinco, kenwood, icom, yaesu and wouxun. A portable 8element wideband yagi for 70cm atv heres a simple broadband yagi antenna that can be built on a 4 foot boom and used for portable atv, ssb, or satellite work on the 70cm band. Compare 5 loans at once with loanspread loan comparison calculator and drill down into a loan summary of any of the 5 you choose. Due to material, i decided on a 5 element yagi built for vhf since all i would have to buy is more 38. Using this software, you can design and build your own yagi antenna.
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