VHF/UHF Yagi Antenna Quick Designer by Martin E. This page is intended for users that want to experiment with a yagi design but do not need all the rhetoric. Yagi Antenna Design and How to Understand basic Yagi's. W7RAI has a very nice DOS based Yagi design program that can be downloaded for FREE! Yagi Calculator is a program to assist with the design of long yagi antennas. It uses the graphs and principles developed by DL6WU and printed. DG7YBN / Milestones in Yagi-Uda design. Amateur Beam Antenna Calculator. This calculator is designed to give the critical information of a particular beam antenna, in this case a three element Yagi. An application designed to generate data for the construction of long Yagi antennas for vhf and UHF use. Yagi Calculator is a program build to produces. Download Yagi-Uda design program Download Yagi-Uda design program Download Yagi-Uda design program. Download Yagi-Uda design program by DL6WU: i1wqrlinkradio.com. Folded Dipoles for VHF/UHF Yagis. Softening the Tubing. Some grades of aluminium alloy tubing may be soft. If you have a choice, buy a hard, stiff grade. The famous yagi-uda antenna is discussed. The background on yagis (the yagi antenna) are given starting with a discussion of the Japanese inventor Yagi himself. VHF/UHF Long Yagi Workshop. DL6WU Yagi for 2320MHz; Programs to design 'classic' DL6WU Yagis. If you try to bend that. If. you pack the tubing with sand to prevent it from collapsing, that only makes it. Begin by measuring out or calculating which. Make the softening zone longer than the theoretical limits of the. Then heat each of those zones in a blowlamp flame until they're softened. One time- honoured method of indicating. Even so, you have to develop your own feel for the right temperature. If you. don't get it hot enough, the metal is still too hard to bend successfully; if. To bring all the metal up to the necessary. You must use a big. After a few trials. Yagi. CAD Tips Tricks and Examples. Yagi. CAD –Tips Tricks. Examples. 1. In 6. Clicking on the . The change will only effect the current session unless. Tools/Options during that session. In 5. x, and up, the maximise, resonate, etc. If the element length. Sometimes. if values are far enough away from the optimum point the optimize function can. In these cases it is best to manually try and vary the values. In 6. x, the effect described in Tip 2 can show up when dealing with the. Quad and Folded Dipole types. In particular when wanting to go from a design. You can manually shorten (usually the case) the now folded. Another way of handling this. Folded Dipole equivalent. The element. can then be changed back to the original diameter and type changed to folded. Certainly close. enough for the Auto optimize functions to be used. An example of a Yagi where. BVO2. In 6. 1. x the Multi. Element can be used other than for a trigonal etc. For example a number of 2 element multi elements can be used. See example 2m. Corner. Reflector. YC6. In 6. Noel D'hont on. 5Ui gives us an example of a simple three element. Quagi for 2. Metres. YC6 This can be scaled using the scaling tool. M band or to other bands entirely. In 5. x and up there are three options for boom correction factors G3. SEK. NBS, and custom. The G3. SEK is also known as the DL6. WU and as used in Yagi. CAD is. a correction factor for insulated through boom mounting, while the NBS one is. The custom version is intended for use. All are approximations only and this is why in 6. In 5. 2 and up the key to getting genetic optimisation to work as you. The page here. gives some ideas on how to do this and some other aspects of optimisation. In 6. 1 there is also a folded dipole element here is an example of. Ohm. impedance. This antenna is useful in that if you are wanting to use a pair for. Ohms, and that 1. Ohm balanced transmission. Ohm coax with the shields. Ohm line. 9. In 6. Typically you will note that the gain will. So if you are going to. Similarly the effects of single verses double precision can be. In 6. x if you want to quickly change the number of segments for all. Yagi design, just open the design, go into tools, options and. Yagi. As. well as changing the default this will also change all the values in the. Yagi. You can then save the Yagi, and if required return the. In 5. x and up if you want to check out the Yagi. CAD results in another. Yagi in standard NEC2 card deck image. In 5. x and up if you need to do some graphing of results, or data. Yagi. CAD results window contains an. These files are easily. MS excel or equivalent where they can be charted. Yagi. CAD. 1. 3. In 6. Bi a value is shown in brackets. Yagi. and is based on information from the ARRL Antenna handbook. This gives an. indication/reference of how good the Yagi is. Note this optimal value is for. Yagi's with simple dipole elements. In 6. 1. 6 and up if you have different band endges to the default ones. In this file are pairs of. MHz. The order entered does not. Yagi. CAD finds that. Yagi frequency will be used as the band edges. So for. example if you wanted to have a narrow band mode band as well as the whole band. Australia you could have on one line say 5. Yagi frequency is say 5. MHz then the first found band. Yagi frequency is 5. Of course you can always override the chosen band. Yagi frequency you have chosen is not between any listed. In 6. x and up to complete changing a field you need to have left that. If say you edited the frequency then without. This applies for pretty much all. Yagicad. In 6. 1 and up when you select other than a plain dipole for the driven. The original method that has been there since Yagi. CAD day one is. to do all the method of moments (ie. This is the where the majority of the match types in. The other way, specifically for the case of the. Yagi. Cad has added in the last couple of. This later method is a more accurate. NEC2 cannot. handle close spaced unequal diameter elements/segments well. As a numerical. example if say using all dipole elements the driven element input impedance. NEC2 model as about 5. Ohms, then the folded dipole match type. Ohms. If however you were to call the driven element a folded type in. Yagi. CAD will add more segments to the NEC2 model to. So anyway if the Tools/Match did. If you want to play with the ratio of. C etc. If. you want the most accurate model ( with only limited variables of folded dipole. The NEC2 model that Yagi. CAD uses is not perfect, and there will be. Yagi. CAD. One of the more common non- ideal items is the effects of ground and. One of the special cases of this is the use of a. My experience with Yagi. CAD is that given a non- conducting boom. Yagi. CAD. models are very close to actual results. If conductive booms are used the. The various boom correction factors. Yagi. CAD are (like the tool matches) something applied after and over. NEC2 model. The boom factors are (certainly in the Yagi. CAD case). experimentally determined correction factors worked out usually backwards ie. The base correction factors in the. Yagi. CAD case are ones that are commonly used in Ham work based on the. DL6. WU (credited to G3. SEK in Yagi. CAD because he did the. DL6. WU data into a more computer friendly equation) and the. American National Bureau of Standards but as even a quick glance will tell you. A quick search on the web will find you many. At the end of the day. With respect to length of elements the length given in Yagi. CAD is the. length of the radiating element, which even in the case of a split driven. This is because you have to feed that split with. For example in a direct coax connection to the split you separate. Yagi. CAD /NEC2 calculations may be. So there is no conversion. It is a different story. Yagi. CAD gives you both the non- boom. Clicking this button during. Under the same. heading as strange things happening, always try and exit Yagi. CAD in the normal. This is true for. Of course it is not the end of the world if you don't but. Late model Windows such as Vista and Windows 7 do not like users. Program Files directory. As Yagi. CAD. stores its configuration etc. If you have windows Vista or 7 then everything will. Alternately just changing it during the. C: \Yagicad. 6 works well also. If you are installing. If this is in. Program files and you have been having problems with saving configuration or. Yagi. CAD first. before installing the new one in a non- Program Files directory. Don't forget to. save a copy somewhere else of any antenna description files you have created /. If you want to design or analyse Yagis created with tapered elements. ARRL Antenna handbook. This method was described. Dr. Leeson in his book Physical Design of Yagi Antennas. Alternatly if you just want the basic element calculations of. Yagi. CAD has a simplified XLS speadsheet which is installed in. Instructions are on the sheet, basicaly. If you want to go. Excel to say vary the length of the last taper segment to minimise. From Robert LAINE on getting Yagi. CAD to install and run on a Debian. Linux box. I succeeded to install Yagi. CAD6. 2. on a Linux Debian. Install wine with : ~$ sudo apt- get. Download Microsoft . NET 4 client. and server from anywhere like Microsoft site or other site and install it with. You may have to remove . YC6. 20. Setup. exe from Yagi. CAD. com. 4- Install YC6. Setup. exe with : ~$. YC6. 20. Setup. exe. The Yagi. CAD6 icon does not appear. Yagi. Cad. 6 by clicking on the Yagi. Cad. 6. exe file located. VK3. DIP, to the standard ending of the “at” symbol and Yagi.
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