Se20m moxon uses stainless steel hose clamps to allow field adjustment of antenna to specific frequency of interest. Constructed of 38 hard drawn 6063t832 aluminum tubing, 6061t6 aluminum, uv resistant pvc, and stainless steel hardware. This program has been derived from a public domain basic program written by l. 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. John simpson, kg4zow download source code for this program. This antenna consists of 2 moxon style rectangles mounted on a boom similar to a yagi antenna.
This antenna has a very good fb and bandwidth works from 27. From 2010 to 2014 i used a 15 meter twoelement moxon beam as a temporary antenna for contests. Using antenna modeling software program antenna was modeled using multinec software. The moxon antenna or moxon rectangle is a simple and mechanically robust twoelement. Se1720m moxon antenna for 17 or 20 meter operation. Building a vertical moxon presents some challenges.
I built it from plans in the may 2003 issue of qst magazine. Because of the size and light construction this antenna is also. T hanks to this site and pete mills in particular i decided to build a moxon to take on our trips to the scottish islands. Time to graduate to a quckanddirty 3element antenna. Constructed of 12 and 38 hard drawn 6063t832 aluminum tubing, 6061t6 aluminum, uv resistant pvc, and stainless steel. The moxon rectangle is a fascinating antenna on several scores. The moxon rectangle antenna is a very compact, high performance yagi beam antenna. A 2 element moxon antenna for the 20 meter 14mhz band. The performance of the antenna, through the model, will be explored in several typical settings. Dimensions 4,5 4,05 meter, weight about 3,0kg, gain 9,3 dbi. Describe your experience with the sal electronics se2m 2 meter moxon beam and tell us why you give it the rating you did required.
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. It was time to upgrade to newer modeling software so this project gave me a reason to purchase eznec from roy lewallen, w7el, and add that to the fun. The following schematic shows the moxons geometry and radiation pattern. There are numerous limitations at my present qth location in pretoria, south africa. It is popular with amateur radio enthusiasts for its simplicity of construction and great performance. Speedometers, thermometers, swr meters, and smith charts. The quality of the parts is outstanding with no burrs and everything fit together as it. 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. It sort of folded over, and the guying held it on the roof. I built a 20m moxon out of 14ga strended wire covered by pvc. One restriction is that i cant put up a usable tower or pole for a beam antenna. First, determine the dimensions for the wire elements using the moxgen calculator, this software is available online for download. Any such, capacitive, load should be placed at a high impedance point of the antenna.
I was officially introduced to the moxon antenna by a local ham. A 2 element moxon antenna for the 10 meter 28mhz band. What if i put here a ferrite choke right on the braid, or, possibly better, make a trap with several turns of the cable with trimming capacitor e. The performance was excellent with good gain, great side and back rejection and seemed to work very well. Mark 1 used a couple of fishing pole as supports but the bent far too much in the wind so i decided to engineer a more substantial arrangement that is easier to put up. The program is based on an algorithm developed by l. Since then it has been a very popular limited space yagi do to its very compact size. Modeling the 40m w6nl moxon 1 april, 2012 modeling the w6nl 40m moxon greg ordy, w8wwv april, 2012 v1. Moxon g6xn in his book hf antennas for all locations rsgb publications, great britain 1993. This famous type of antenna was invented in japan in the 1920s, by dr. Some years ago i built a moxon rectangle antenna for 6 meters.
I didnt fancy the standard wire antenna with the cross support poles, i wanted something a little sturdier, and found this website which describes all the details for constructing a tubular moxon including the moxgen software for working out the dimensions. The front to back on this moxon is very good quite good in fact. Once the matchbox and reflector wire are attached phillips screw driver the antenna tunes and mounts without. The moxon antennas also known as moxon rectangles are two elements beam antennas, based on a simple design, similar to yagi antennas, but with bent elements and without the director. So i narrowed it down to a simple halfsize 2element yagi. The moxon design has the end parts of the element bend at 90 degrees which helps. So i threw together a 20m ground plane and it did well for what it was, but if youre used to a directional antenna its really hard to be without one, particularly on 20 meters. Here we see the software set to design an antenna for 17 meters using 18. 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. Dec 03, 2012 the frame is big for 15m as i will soon be using it for a 20m moxon too. This is antenna modeling software that uses excel for an interface and standard nec 2 equations.
This is a world wide web front end for a public domain program written by w4vp9kf using php. Cebik, w4rnl, developed an algorithm for calculating the dimensions of a moxon rectangle antenna. W5gi mystery antenna pop w5gi mystery antenna is a multiband wire antenna that performs exceptionally well even though it confounds antenna modeling software. Apr 08, 2015 moxon rectangle generator is a tiny and portable application that can generate and print models for 50ohm moxon rectangle antennas, based on the settings you configure. Build a 17 meter reduced size coaxial moxon rectangl. Moxon rectangle generator is a tiny and portable application that can generate and print models for 50ohm moxon rectangle antennas, based on the settings you configure. Antenna modeling software and other utility programs by dan maguire, ac6la. 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. Construction of a 20m vertical moxon for use adjacent to. The moxon rectangle comprises of 2 elements, a driven element and a reflector element. As with all beam antennas, performance characteristics of a yagi antenna are fronttoback ratio fb, a. The 6 meter moxon is built from 5 8 inch od and 1 2 inch od aluminum tubing with 3 8 inch od solid aluminum for the corners. Moxgen moxon rectangle generator 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 om144 is a horizontally polarized, directional antenna designed for the cwssb portion of 2m. He asked me to write this small program incorporating his work and i was happy to oblige. Essentially it consists of two metal or wire elements. All moxon s share the ratio of the length and width 2. The moxon antenna is a simple two element parasitic array antenna. This was the verticallyoriented moxon antenna i setup for the california qso party out in mariposa county on october 2006. The fb was better as advertised, but for whatever reasons the yagi always showed better gain over the dipole than the moxon, and they were mounted the exact same places. Long story short, i decided a lightweight, monoband fixed yagi may just work. A moxon beam can be expected to provide approximately 5. Jpole is a free and portable antenna design software for windows.
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. A moxon rectangle yagi for 27mhz the moxon rectangle was first introduced by les moxon, g6xn during the 1950s. The antenna is similar to a 2element yagi with the element ends folded toward each other. 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. Jan 05, 2007 this was the verticallyoriented moxon antenna i setup for the california qso party out in mariposa county on october 2006. Tested here fitted with 15m elements at ft4m high or so. Ill post a short video of the same signal from the moxon, a 20m dipole. The moxon rectangle was first introduced by les moxon, g6xn during the 1950s. 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. Ill post a short video of the same signal from the moxon, a 20m dipole beside it. Moxon is down, due to very heavy winds actually, the 40mm aluminum part of the mast could not handle the wind load. The moxon antenna was designed by les moxon g6xn and is an optimisation of an earlier australian design for a compact 2el beam.
Design and build a 6 meter 2element moxon antenna mostly from available aluminum tubing and angle stock. The moxon generator design program configures a file for direct import into antenna. Elevation plot on 20m if you put this antenna on for example 20 meter height, you will be surprised about the results. Thanks folks and you know wavrider, i did have a 20m moxon up for a while, on a rotator. 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. Eznec modeling indicated approximately 6 dbi gain at around 10 degrees toa. The moxon antenna design the moxon antenna was designed by les moxon g6xn and is an optimisation of an earlier australian design for a compact 2el beam. For this moxon beam or moxbeam project i describe a portable version of my attic antenna that is built from composite lumber, fiberglass tubing. The model is for average ground conditions and with an elevation 20 feet. I made an experimental mono band moxon for 15 mtrs using some of the.
The radiation pattern is shown in the traditional arrl style and was generated from the final design by xnecview. Construction of a 20m vertical moxon for use adjacent to salt. Very well made with high quality parts and manufacturing. I use it vertical so my experience might be different. 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. Collectively we have all drawn on the experience of les moxon, g6xn, and his work to transform the vk2abq 2 element. This is an extremely well made antenna with quality from top to bottom.
This isnt bad, as i was planning to take it down this week, anyway. The design is rectangular, with less than half of the rectangle being the driven element and the other half being the reflector. 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. Support poles cant be metal or they will interfere with the moxon. This antenna covers 80 to 6 meters with low feed point impedance and will work with most radios, with or without an antenna tuner. Such a directional antenna requires at least two elements, a fullsize antenna for wavelength over 10 mtr will not fit, and 10 mtr is usually not my favorite band. Here you can find a draft document detailing how i built my 20m vertical moxon antenna that we use on our trips to the scottish islands. I wanted an antenna that could dx with the united states of america anytime the band was open. Compared to the moxon 4 element this antenna has one element extra between the two moxons. Moxon hi, i would like to share with you my experience and i hope will help you.
The moxon is suspended above the horizontal 1x2 board although it looks as though it is sitting on it. The antenna performs quite well on the 2 meter band, even though it was designed exclusively for the lower 3 murs channels. It is used to design jpole antennas for the desired frequency. Stressed moxon antenna par electronics filters for the. An effective 1020m dx antenna for deed restricted lots.
I looked at a number of small or compact yagis, hexbeams, quads, etc. Compared to the moxon 4 element this antenna has one element extra between the two moxon s. A typical moxon rectangle can be built in a few hours, using x or h type of spreaders made from bamboo, fiberglass. A satisfactory point for installing a capacitive load is.
A 6 meter moxon antenna discover 6 meters for the first time or enhance your existing operation with a rugged but portable version of this novel 2 element antenna. I had to shorten the antenna almost 6 and i had to shorten both the short elements and the reflector. The back rectangle was the reflector and the driven element. I did some searching on the web and came across the moxon antenna which looked to be just the job and fairly easy to build. I didnt fancy the standard wire antenna with the cross support poles, i wanted something a little sturdier, and found this website which describes all the details for constructing a tubular moxon including the moxgen software for working out. 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. A collection of seven projects of moxon antennas for ham radio hf bands.
Shown is the se20m driven element uv resistant pvc mount with four uv resistant pvc tubing clamps. The vertical moxon can also be modified to produce a pattern resembling a dipole. The moxon elements are just under 50 long while each of the 4 t elements are about 20. Elevation plot on 20m measurements to build a moxon 4 element. This beam is a 2elementyagi with radiator and reflector and reduced size to about 75% of a normal beam.