21 mhz moxon antenna software

Since i had been looking around for an easy to build directional antenna to monitor the local 770 mhz p25 system i decided to run the numbers for 772mhz and see how big the antenna would be. That is why im trying to find something a little bit better. The author isa keen enthusiast of the moxon rectangle antenna, invented by the late les moxon, g6xn. Constructed of 12 and 38 hard drawn 6063t832 aluminum tubing, 6061t6 aluminum, uv. I ended up pruning and tuning the antenna another half inch or so to get it to the closest match possible. The rectangular loop has somewhat better patterns than the delta loop. The main category is 30 meter antennas that is about antenna projects for the 10 mhz 30 meter band. Building the 6 meter moxon antenna kb9vbr jpole antennas. This note looks at the antenna and antenna model for the 40 meter. Armed with the satisfaction i was on the right track, i installed the 15meter moxon above the 17meter antenna. Compact, low height vertically polarized dx antenna. The main category is 20 m vertical antennas that is about 20 meter vertical antenna projects. 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.

In moxons book, hf antennas for all locations, g6xn notes a detuning system that. 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. Stressed moxon antenna par electronics filters for the. Modeling the 40m w6nl moxon 1 april, 2012 modeling the w6nl 40m moxon greg ordy, w8wwv april, 2012 v1. It was written by kg4jjh, who provides detailed drawings of the parts and directions for assembly. This antenna was built to match the peak of suncycle 22.

Flip beam antenna fba moxon antenna optimized for fb ratio. This link is listed in our web site directory since wednesday jul 23 2008, and till today vertical moxon for 14 mhz has been followed for a total of 6238 times. Lower swr was measured at a lower frequency about 1. Constructed of 12 and 38 hard drawn 6063t832 aluminum tubing, 6061t6 aluminum, uv resistant pvc, and stainless steel hardware. As the driver grows shorter, the reflector grows shorter by a smaller amount. I then ran it through eznec to make sure it was correct. The moxon generator design program configures a file for direct import into antenna. Using these measurements gave me an antenna that was about 1. The performance of the antenna, through the model, will be explored in several typical settings. Im building the antenna from 716ths inch and 38ths inch tubing. Ham radio portable moxon antenna vhf 145 mhz supports by.

This link is listed in our web site directory since saturday nov 10 2018, and till today super duper moxon for 144 mhz has been followed for a total of 752 times. Moxon rectangle for 21mhz 15m band 15m innovantennas moxon in user portable wa2tdes comments abount his 20m moxon. The moxon antenna or moxon rectangle is a simple and mechanically robust twoelement parasitic array antenna. Moxon g6xn in his book hf antennas for all locations rsgb publications, great britain 1993. Diamond srh320a 144220440 mhz triband handheld sma antenna. Home shop amateur radio antennas base antennas innovantennas 21 mhz moxon. Jun 07, 2012 so the frequency in question was to be 433. Designing a moxon beam is very easy with a useful little program by d. I checked how the eznec pattern looks when operating at 21 mhz with the 17m antenna and it does not look much different from 18 mhz. The program is based on an algorithm developed by l.

A wavelength of 70 cm makes a nice modelling size compared to 21 metres. Diy build and simulation of the moxon antenna with 4nec2 software. Through these software, you can design various types of antennas like yagi, jpole, parabolic, quagi, super scanner, etc. Ham radio portable moxon antenna vhf 145 mhz supports by sterminato is licensed under the creative commons attribution share alike license. From 2010 to 2014 i used a 15 meter twoelement moxon beam as a temporary antenna for contests. I built it from plans in the may 2003 issue of qst magazine. On tuesday the 7th of april 2020, a remarkable contact was made on the ft8 digital mode on 432 mhz. This antenna has a very good fb and bandwidth works from 27. This program has been derived from a public domain basic program written by l.

At 21 mhz bottom wire at 12 ft is optimum at 14 and 21 mhz. The moxon elements are just under 50 long while each of the 4 t elements are about 20. The wire for 21 mhz is inside the fishing rod to prevent problems with swr when raining. A two element cubical quad antenna has also been suggested as a jupiter antenna. In mhz this is a world wide web front end for a public domain program written by w4vp9kf using php. Plans for these and other beam antennas are available in the arrl antenna handbook. The moxon beam by dk7zb, moxon yagi, moxon antenna. The moxon rectangle comprises of 2 elements, a driven element and a. Cebik, w4rnl the moxon rectangle is a fascinating antenna on several scores.

Low band antennas at w3lpl high performance transmitting and receiving antennas for 160, 80 and 40 meter. Moxon antenna for 144 mhz the moxon antenna or moxon rectangle is a simple and mechanically robust twoelement parasitic array antenna. So i build the thing to the measurements, take it out to the back yard and get it up and the swr is 7. It works as a 3 element yagi on 21 mhz and as a 4 element on 28 mhz. Constructed of 38 hard drawn 6063t832 aluminum tubing, 6061t6 aluminum, uv resistant pvc, and stainless steel hardware. Nowadays, in the 64bit era, with the advent of windows 7 and higher, running a old msdos program is very hard, but fortunately someone thought to us. Jul 02, 2015 using antenna modeling software program antenna was modeled using multinec software. Using coax traps and insulated wire this inverted dipole antenna can be used on 3. However, we can hardly miss the forward side lobes. About 4030 moxon the resource is currently listed in in 3 categories. It is outstanding, but also has only two elements on 15 and 10 meters. Using antenna modeling software program antenna was modeled using multinec software. Aug 15, 20 diy build and simulation of the moxon antenna with 4nec2 software.

Moxons in the attic part 1 nashua area radio society. I may be able to mount it as high as 20 feet agl before visability becomes an issue, roughtly 12 a wavelength on 11 meters, but i said 17 feet as a more probably number, and the extra 3 feet probably will not gain much. If you go back and look at the calculator you posted it does not look like the one. The moxon rectangle comprises of 2 elements, a driven element and a reflector element. When transmitting a constant 50 watt into the antenna for. I built a log periodic dipole array for spectral work on jupiter. The stressed design allows the antenna to be light weight yet strong. A horizontial moxon would be quite low profile compared to a vertical loopdelta antenna. I experienced the same results on my 1st moxon for 15 meter band, i used an insulated wire and the resonant freq.

Here is a list of best free antenna design software for windows. The moxon rectangle was first introduced by les moxon, g6xn during the 1950s. Omni radiation from 30m to 15m, somewhat directional on 10m. This popular antenna uses a 2element 20 meter driverreflector yagi at its core. I want directional antenna and need good performance.

On the bright side, i can always use the tuner in the k3 to make the 15m moxon play right for the band, giving me some flexibility if i can hear a station better on. About vertical moxon for 14 mhz the resource is currently listed in in 2 categories. Moxon antenna for 50 mhz, the moxon rectangle is a quite broadband antenna, but it is not quite broad enough to cover the entire band. Since then it has been a very popular limited space yagi do to its very compact size. The gw3ydx super moxon adding extra directivity to the moxon rectangle for 6m, 4, and 2m photo 1. I hooked up the analyzer and fired it up only to find to that its resonant point was a dismal 3. Unknown said hi, i have done a bit with the moxon antenna geometry and also a bit with the wa5vjb style yagiuda so i am intrigued with the idea of combining the two like this, its really interesting that you figured out a way to make it dual band without a physical electrical connection to the 70cm driven element, im assuming thats done with near field inductance. This is a world wide web front end for a public domain program written by w4vp9kf using php. But it has only two elements on 21 mhz, and at the moment, i have homebrew moxon antenna. Each antenna design software is slightly different from each other as each software design some specific types of antenna.

Tiny terrestrial tv antenna pulls in overthehill stations. Fr5ec moxon hybride 3 bands 28, 21 et 14 mhz coaxial traps. Specifications forward gain in free space 2015m dbi. Shorty 40 2 element yagi or moxon rectangle 70100 feet high. It takes its name from the amateur radio operator les moxon amateur radio call sign g6xn. Traps are made of coax cable using ve6yp coax trap program. The moxon rectangle antenna is a very compact, high performance yagi beam.

This is antenna modeling software that uses excel for an interface and standard nec 2 equations. 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. Sep 17, 2016 armed with the satisfaction i was on the right track, i installed the 15meter moxon above the 17meter antenna. About super duper moxon for 144 mhz the resource is currently listed in in 2 categories. You can then run multiple eznec test cases while autoez automatically changes one or more variables between runs. Johnson, i am writing to tell you how pleased i am with both the mechanics and electrical performance of the mox 14, two element beam antenna. I was introduced to the moxon antenna at an amateur radio club recently. Jun 07, 2012 with a feeding point 15 percent from the moxons lower corner and a 4. And in the next year, sunspot number will only grow. Not a bad choice for long range fpv work on 433mhz. The main category is antennas for 2 meters band that is about antenna projects for 144 mhz. Although i have written about this design before, questions still pop up regularly. The orange type appears more firm and sturdier than the blue ones. Nov 21, 2018 i was introduced to the moxon antenna at an amateur radio club recently.

Autoez works in conjunction with the eznec antenna modeling program and allows you to use variables to control diverse aspects of the model. The moxon antenna can provide hams with an excellent antenna system that is easy to homebrew and usually does not require any adjustment if made according to the dimensions specified by software that is available on this website. Well tba02s, calculator shows to be entitled moxon rectangle basic dimensions, not moxon generator. This beam is a 2elementyagi with radiator and reflector and reduced size to about 75% of a normal beam. I used the moxgen program to get the measurements of the antenna. To those ends, i developed the antenna as a unidirectional beam, allowing the elements to have their own native dimensions instead of electrically tuning them. The moxon antenna hold promise as a jupiter antenna. This antenna covers 17 to 30 mhz and has performed well. 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. The basic outline and dimensions were found on w4rnl.

For an overview of this antenna see the cebik article the moxon rectangle. A moxon rectangle antenna for 4m, g6gvi i used five sections of fibreglass kite spar to support the wire. From what ive heard, the moxon is a pretty good antenna as far as bandwidth goes, so id probably need to lengthen it out a bit from the voice freqs on 10 to fall between 27 mhz and 28 mhz in order to handle such within usable range, right. The model is for average ground conditions and with an elevation 20 feet. Software modeling of the moxon antenna shows that it has about 6dbi. Armed with these dimensions based on a 2 metre antenna, i used mmana to scale the values for 433. I made an experimental mono band moxon for 15 mtrs using some of the. Table 2 lists the predicted performance of the 3 antenna versions at 144, 146, and 148 mhz. A typical moxon rectangle can be built in a few hours, using x or h type of spreaders made from bamboo, fiberglass. Moxons in the attic part 3 nashua area radio society. 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. My own work, aided considerably by the emergence of modeling software, has been devoted to refining and understanding the characteristics of the moxon rectangle.