Pretty sure youre not looking for something like a fixed beam but a 40m. Through these software, you can design various types of antennas like yagi, jpole, parabolic, quagi, super scanner, etc. Jk402t 2 element 40m moxon style capacitive loaded yagi. Following is the description of the 40m array we used at sy3m.
Any such, capacitive, load should be placed at a high impedance point of the antenna. Not obvious here, but there is a 20cm gap between the 2 horizontal parts. Each antenna design software is slightly different from each other as each software design some specific types of antenna. The moxon is suspended above the horizontal 1x2 board although it looks as though it is sitting on it. Fishing for radio signals with the moxon antenna hackaday. Compared to the moxon 4 element this antenna has one element extra between the two moxons.
Links to moxon antenna resources category is a curation of 69 web resources on, the gw3ydx super moxon antenna, n2yet moxon projext, moxon rectangles. It was written by kg4jjh, who provides detailed drawings of the parts and directions for assembly. Like all 2element driverreflector beams, the gain is highest at the low end of. As with the moxon antenna, the design omits the directors found in a.
But as the moxon gets it fabulous performance from the capacitive coupling between the ends of the two elements one should avoid upsetting this geometry. This link is listed in our web site directory since thursday aug 12 2010, and till today 4030 moxon has been followed for a total of 4735 times. The se6mb moxon lite antenna is a lighter weight version of the se6m designed for rooftop installations, or anywhere a light weight beam is needed. If you are looking for a very simple, but reasonably effective, 40m antenna for your portable operations, this article is a recipe for one that should yield about 3 dbi gain straight up. The 40m loop antenna ed, vk2ji this antenna is also known under the names sky loop and dxbuster and is very similar to a horizontal delta loop. Jun 07, 2012 with these two devices at hand the moxon antenna is far more easily constructed as it relaxes some of the most critical constructional difficulties. You never quite know when the band will open and where it will take you. The moxon antenna is a relatively simple antenna to build as it consists of just 2 elements, yet has a decent gain of about 6 dbi and a fronttoback approaching 30 dbi or more. This antenna is made for the dxer or contester that is looking for an antenna to work across the globe. The moxon can show very fine fbratios indeed, above 40 dbs have been mentioned.
The following is an article which i wrote and was published in the february 20 edition of the central coast arc smoke signals magazine. In last years field day operation, the bands were not in our favor. Liked by view all give a shout out if you print this thing and display it in public proudly give attribution by printing and displaying this tag. View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation. The jk402 is a short boom 2 element 40m yagi that has excellent gain and fr. Stressed moxon antenna par electronics filters for the. We can also provide you with custom settings to suit your operating preference such as peaking your gain and fb in the cw portion or the phone portion of the band. Modeling the 40m w6nl moxon 1 april, 2012 modeling the w6nl 40m moxon greg ordy, w8wwv april, 2012 v1.
When it comes to the moxon, this antenna is no exception. Stressed moxon antenna the sm50 is a directional 6m antenna occupying approximately 50% of the space of a 2 element yagi, yet having similar gain and better fb. The 2elementyagi with reflector has normally a 0,2lambdaboom and an impedance of 50 w. The elements are loaded capacitively which shortens the overall length while still maintaining a good gain, fr across the 40m band. I made an experimental mono band moxon for 15 mtrs using some of the. I used the moxgen program to get the measurements of the antenna. From 2010 to 2014 i used a 15 meter twoelement moxon beam as a temporary antenna for contests. The main category is 30 meter antennas that is about antenna projects for the 10 mhz 30 meter band.
A vertical half moxon for the 40m band the mmana model. Since then it has been a very popular limited space yagi do to its very compact size. A 2 element moxon antenna for the 11 meter 27mhz band. G0ksc home of the lfa yagi free yagi antenna designs. A satisfactory point for installing a capacitive load is. Ham radio portable moxon antenna vhf 145 mhz supports by. Software downloads wire antennas uk hf antennas made by. Google my call, m3kxz, and youll find details on the moxon antenna project site and elsewhere. I then ran it through eznec to make sure it was correct. The moxon elements are just under 50 long while each of the 4 t elements are about 20. Three elements inverted v wirebeam antenna for 40 meters band olivier vandenbalck on4eiei8gqbei1a. The sm50 is a directional 6m antenna occupying approximately 50% of the space of a 2 element yagi, yet having similar gain and better fb. Jun 07, 2012 so, as a conclusion, i wish the antenna to be adjustable in some way to achieve its best.
Hi greetings, i have already started to construct a 3 element yagi for 40 metres but have not yet decided how i am going to match or feed the antenna, what is it you used, a gamma match with a tuning capacitor connected to it and what is the rectangular box the tuning capacitor goes on to before the 75 ohm coax. It is composed of 2x inverted ls facing each other with 6m spacing between the 7. Dimensions 4,5 4,05 meter, weight about 3,0kg, gain 9,3 dbi. Software modeling of the moxon antenna shows that it has about 6dbi of gain and about a 25db front to back ratio. Construction of a 20m vertical moxon for use adjacent to. Describe your experience with the sal electronics se2m 2 meter moxon beam and tell us why you give it the rating you did required. Compared to the moxon 4 element this antenna has one element extra between the two moxon s. The moxon design has the end parts of the element bend at 90 degrees which helps.
Bill meara has finished his latest project, a moxon antenna for hf on 17 meters. The growing interest in the moxon rectangle as a wire beam for 40meter use has prompted me to collect some of my casual notes on the subject and place them here. The se6mb moxon lite is field adjustable anywhere from 50 to54 mc the se6mb can be mounted horizontally for cwssb operation, or vertically for fm operation. In fact, a 40meter moxon rectangle is about 50 from one tail set to the other. Collectively we have all drawn on the experience of les moxon, g6xn, and his work to transform the vk2abq 2 element. Figure 1 a comparison of the lower radiation angle and greater gain of the moxon red compared to the dipole blue. For the driver, junctions occur at the element ends and at the feedpoint. The radiation pattern is shown in the traditional arrl style and was generated from the final design by xnecview. Moxon antenna generator from dan maguire, ac6la cand is based on an algorithm developed by l. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. These are great characteristics for a low band vhf and hf style antenna as selectivity is preferred over big gain. Although i have written about this design before, questions still pop up regularly. Experiments with a moxon rectangle antenna, ik1zyw.
Kd6wd introduce moxon rectangles, and in particular explains how he built a moxon antenna for 15 17 and 20 meters band with excellent pictures. Ham radio portable moxon antenna vhf 145 mhz supports by sterminato is licensed under the creative commons attribution share alike license. When not building awesome radios, he can be found ranting about ham radio. During this contest, i also used a 40m inverted vee dipole, which was very efficient for contacting uk stations during the. Originally designed by les moxon g6xn, the antenna is stealthy and is an ideal solution for those whose space is limited or restricted, but also gives the user a directional antenna for a smaller footprint. The growing interest in the moxon rectangle as a wire beam for 40meter use has. The jk402t is a 22ft boom 2 element 40m yagi that has excellent gain and fr. A 2 element moxon antenna for the 10 meter 28mhz band. Construction of a 20m vertical moxon for use adjacent to salt water based on a design by pete mills, m3kxz paul fletcher, m1paf.
Autoez works in conjunction with the eznec antenna modeling program and allows you to use variables to control diverse aspects of the model. Cebik, w4rnl the moxon rectangle is a fascinating antenna on several scores. I built it from plans in the may 2003 issue of qst magazine. The aim is to provide a few extra ideas for those wishing to experiment with the antenna. The antenna was designed on the spot and constructed very quickly using 2x 10m fiber masts. This antenna performed similar to a full size two element yagi for 40 meters. The following schematic shows the moxons geometry and radiation pattern. A 20 meter moxon antenna moxons work great and they take up less space than full size two element yagis. The stressed design allows the antenna to be light weight yet strong. Moxgen will show you the dimensions and optionally generate an antenna model file for a 50 ohm moxon rectangle antenna, given the design frequency and wire size. However that figure is only achievable in practice if the antenna is in free space. The mfj1890 is a lightweight aluminum antenna designed to operate in the 10 meter band and we had hoped that with a little messing around we could get it to tune to the 11 meter cb band. Zplots uses excels charting capabilities to plot impedance data obtained from a variety of sources, including the w5big aim4170 antenna analyzer, the n2pk vector network analyzer, and several different antenna modeling programs.
The moxon rectangle was first introduced by les moxon, g6xn during the 1950s. This note looks at the antenna and antenna model for the 40 meter moxon yagi. The moxon rectangle comprises of 2 elements, a driven element and a reflector element. Moxgen will show you the dimensions and optionally generate an antenna model file for a 50 ohm moxon rectangle antenna, given the design frequency and. This project to construct a vertical moxon antenna for the amateur 20m band was inspired by the work and experience of pete mills, m3kxz, and the moxon antenna. Once the matchbox and reflector wire are attached phillips screw driver the antenna tunes and mounts without. Im building the antenna from 716ths inch and 38ths inch tubing.
The performance of the antenna, through the model, will be explored in several typical settings. For an overview of this antenna see the cebik article the moxon rectangle. About 4030 moxon the resource is currently listed in in 3 categories. Dimensions ive recently made a 4element yagi in software for my. Known as the magic band, the six meter band can be mysterious, unpredictable, and downright fun. This project to construct a vertical moxon antenna for the amateur 20m band was inspired by the work and experience of pete mills, m3kxz, and the moxon antenna project group. Here is a list of best free antenna design software for windows. This program has been derived from a public domain basic program written by l. The program is based on an algorithm developed by l. With these two devices at hand the moxon antenna is far more easily constructed as it relaxes some of the most critical constructional difficulties. Antenna modeling software and other utility programs. Jan 30, 2016 hi greetings, i have already started to construct a 3 element yagi for 40 metres but have not yet decided how i am going to match or feed the antenna, what is it you used, a gamma match with a tuning capacitor connected to it and what is the rectangular box the tuning capacitor goes on to before the 75 ohm coax. W1uj 40 meter moxon project 2011 updated 9may2012 w1uj 40m moxon over 4el steppir 8p5a moxon project click here pw7t moxon project click here k1kp moxon project click here comparison to the kb1h full sized 40m 3el dallas and w1ujw6nl moxon click here this is k1gu, nedtns moxon setup 4el steppir below. Building the 6 meter moxon antenna kb9vbr jpole antennas.
Postings on mailing lists show that very few of us have used calculated wire lengths and been happy with them directly. Viewing 10 posts 1 through 10 of 10 total author posts july 12, 2017 at 8. If you build this antenna using the above dimensions, make it a bit long and trim the driver to your target resonance. Essentially it consists of two metal or wire elements. Jul 30, 2014 2 element 40 meter beam recomendations. The moxon antenna was designed by les moxon g6xn and is an optimisation of an earlier australian design for a compact 2el beam. Some years ago i built a moxon rectangle antenna for 6 meters. The antenna works pretty well in general, but its not a full band antenna. The performance was excellent with good gain, great side and back rejection and seemed to work very well. The author isa keen enthusiast of the moxon rectangle antenna, invented by the late les moxon, g6xn. If you decide to buy the new version, i would look at converting it to a moxon. Some years ago i built a moxon rectangle antenna for 6. This beam is a 2elementyagi with radiator and reflector and reduced size to about 75% of a normal beam. The gw3ydx super moxon adding extra directivity to the moxon rectangle for 6m, 4, and 2m photo 1.
He asked me to write this small program incorporating his. The antenna performs quite well on the 2 meter band, even though it was designed exclusively for the lower 3 murs channels. This is a world wide web front end for a public domain program written by w4vp9kf using php. As the late spring and summer months heat up, six meters comes alive. Constructed of 38 hard drawn 6063t832 aluminum tubing, 6061t6 aluminum, uv resistant pvc, and stainless steel hardware. A few words on the software tool flow used in this note. John simpson, kg4zow download source code for this program. So i build the thing to the measurements, take it out to the back yard and get it up and the. W1uj 40m moxon over 4el steppir 8p5a moxon project click here pw7t moxon project click here k1kp moxon project click here comparison to the kb1h full sized 40m 3el dallas and w1ujw6nl moxon click here this is k1gu, nedtns moxon setup 4el steppir below. Originally designed by les moxon g6xn, the antenna is stealthy and is an ideal solution for those whose space is limited or restricted, but also gives the user a directional antenna for a smaller footprint the moxon design has the end parts of the element bend at 90 degrees which helps. Nashua area radio society topics in all forums homebrew forum possible 40m short yagi designs this topic has 9 replies, 6 voices, and was last updated 2 years, 8 months ago by jim lajoie.
A lot of performance in a modest package the boom is a mere 3. Other hams have built antennas to the same dimensions i optimised for placement close to the ground in vertical orientation and they have also had great success with them. Construction of a 20m vertical moxon for use adjacent to salt. Moxon g6xn in his book hf antennas for all locations rsgb publications, great britain 1993.
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