At the present time the only band which can be used on a daily basis is 20 metres, all the others for which you could make a portable moxon, 10,12,15 and 17 are all but dead. He asked me to write this small program incorporating his work and i was happy to oblige. Steves design included using pvc pipe for his 2 element, 6 meter beam, and his 3 element, two meter beam. The moxon antenna is a good antenna, and 17 metres is almost dead in britain. 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. 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. I had black plastic tube clamps for oneinch tubing and also two feet of 118 inch fiberglass tubing greenish tubing that i used inside for. One restriction is that i cant put up a usable tower or pole for a beam antenna. One antenna uses all coax the other uses coax and twin lead.
The moxon rectangle antenna is a very compact, high performance yagi beam antenna. Se1720m moxon antenna for 17 or 20 meter operation. The antenna that i put up first was a vertical dipole for 10, 15, 20 and 40 meters. Speedometers, thermometers, swr meters, and smith charts. The 20meter model at hand was designed for a 50ohm feed which is a natural for the. I wanted an antenna that could dx with the united states of america anytime the band was open. The model is for average ground conditions and with an elevation 20 feet. This link is listed in our web site directory since sunday apr 6 2008, and till today large multiband moxon antenna has been followed for a total of 3842 times.
Dimensions 4,0 4,0 meter, weight about 2,5 kg, gain 7,5 dbi. From 2010 to 2014 i used a 15 meter twoelement moxon beam as a temporary antenna for contests. The moxon is a stealthy gain antenna that can be easily home brewed for a small investment. The moxon is suspended above the horizontal 1x2 board although it looks as though it is sitting on it. Using these plans provided by n0khq, the same moxon retangle is reduced to about 11 feet wide. The vertical antenna has many devoted supporters in the ham community who claim to get fantastic results, 2. Cebik, w4rnl, developed an algorithm for calculating the dimensions of a moxon rectangle antenna. It was written by kg4jjh, who provides detailed drawings of the parts and directions for assembly. Join the 17 meter fun with plans, diagrams and formulas for making any hf antenna smaller.
Stressed moxon antenna par electronics filters for the. Figure 5 shows the operative dimensional parts of any moxon rectangle. Software antenna software defined radio swr meter system of grounding theory traps tower. I know the height of the antenna was too low, there was no sufficient tree available so i made a smal mast of about 4 meters high. Build a double bazooka antenna k3dav version by david k3dav. He asked me to write this small program incorporating his work and i was happy to. The author isa keen enthusiast of the moxon rectangle antenna, invented by the late les moxon, g6xn. The moxon design has the end parts of the element bend at 90 degrees which helps save space. M4 terminal coaxial termination is provided on this antenna. When fabricated and tuned at 9 feet almost 14 wavelength at 17m the coaxial antenna produced the following readings.
Build a 17 meter reduced size coaxial moxon rectangl. Two nested, horizontal moxon elements provide a good gain and an. 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. A standard moxon rectangle designed for 17 meters would be about 19 34 feet wide. The moxon antenna project website has many designs available for viewing and is a source of information about moxon antennas. About large multiband moxon antenna the resource is currently listed in in 2 categories. An interesting point is to compare the lengths specified by john against the formula for a 14 wave element at 52 mhz 70 mm long 30052 x 0. My 2 meter 6 element super duper moxon antenna by stepehn binns wb8aht a modified haarp antenna by phil simpson m0pxs a modified super moxon antenna by gw3ydx this 2 meter antenna has 2 characteristics that make it a very favorable antenna to have.
For the aluminum 20 meter moxon, the length a is 25 and the overall width e is 9. Build a double bazooka antenna k3dav version by david. Ive been looking for a 6meter solution for a while, and i finally decided to get the lightweight stressed moxon antenna by par electronics out of north carolina. The main category is 17 meter band antennas that is about 17 meter band antennas. The design is rectangular, with less than half of the rectangle being the driven element and. Coax feedwith a choke, of courseis the order of the day. Dimensions 10,2 4,0 meter, the aluminum boom is only 8,7 meter, gain 11,07dbi. Constructed of 12 and 38 hard drawn 6063t832 aluminum tubing, 6061t6 aluminum, uv resistant pvc, and stainless steel. The antenna arrived this week and i set out to construct a mast for it. Unfortunately the moxgen program was written only for normal wire sizes. The vertical dipole has a very small foot print and requires no radials, 3. Collectively we have all drawn on the experience of les moxon, g6xn, and his work to transform the vk2abq 2 element.
The gw3ydx super moxon adding extra directivity to the moxon rectangle for 6m, 4, and 2m photo 1. Double bazooka coaxial dipole antenna info there is a lot of controversy surrounding the double bazooka coaxial dipole. The se20m can be also be setup for 17 meter operation by resetting the reflector and element spacer settings with an vswr of 1. Modeling the 40m w6nl moxon 1 april, 2012 modeling the w6nl 40m moxon greg ordy, w8wwv april, 2012 v1. Build a 17 meter reduced size coaxial moxon rectangle a standard moxon rectangle designed for 17 meters would be about 19 34 feet wide. Dont know about this particular antenna but i can tell you that most days, 17 meters is open here in the. I built it from plans in the may 2003 issue of qst magazine. Nisaea 65ft sma antenna adapter male to female with connecting line 20 meters rg58 coaxial cable sma male to sma female car radio video antenna extension coax cable pure copper 3. The main category is moxon antenna plans that is about links to moxon antenna resources. We can offer you this antenna in a compleet antenna kit for more information send us an email or look on.
Hi ive just put together a moxon for the 17 meter band its in the virtical. About 17 meter coaxial moxon antenna the resource is currently listed in in 2 categories. Here we see the software set to design an antenna for 17 meters using 18. Its bandwidth claims have sometimes been exaggerated. Steve, k4mmg asked me to share my design of two coaxial yagi antennas i made for use on 6 and 2 meters. Using the 468f mhz halfwave antenna formula i calculated the 6meter halfwave length and multiplied by 3 to arrive at the total length for 3 halfwaves on 6meters and a halfwave on 17 meters. This note looks at the antenna and antenna model for the 40 meter moxon yagi designed by dave leeson, w6nl. I wish the antenna to be adjustable in some way to achieve its best. When it comes to the moxon, this antenna is no exception. Strangely enough, i had similar effects with the 17 meter band moxon i built on a camping site during easter. 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. I looked at a number of small or compact yagis, hexbeams, quads, etc. Sota 6m 52 mhz coaxial dipole antenna get out of the.
As you can see, the elements are supported by pvc pipe, which also serves as a channel to route the coaxial cable. Build a 17 meter reduced size coaxial moxon rectangle. Elevation plot on 20m measurements to build a moxon 8 element. Building moxon antenna 101520 mt, du1rz building a moxon is easy since you can work on it on a horizontal plane.
The swr was very lousy however and no signal on 17 meter was heared. The performance of the antenna, through the model, will be explored in several typical settings. Design and build a 6 meter 2element moxon antenna mostly from available aluminum tubing and angle stock. The reasons for this selection as the first antenna to be installed are that. Antenna modeling software and other utility programs by dan maguire, ac6la.
Double bazooka coaxial dipole antenna iw5edi simone. For the aluminum 20meter moxon, the length a is 25 and the overall width e is 9. 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 moxon generator design program configures a file for direct import into antenna modeling software.
Dualband 17m20m moxon, n3ox the voltages across the capacitors on 17m are high. December 8, 2019 internal autotuner for mchf sdr radio this internal automatic antenna tuner is designed specifically for. Basically, a moxon rectangle is a 50 ohm two element wire beam antenna. However, its small size and special far field pattern lend themselves to some vhf applications. One wire gets connected to the center conductor of the coaxial feedline, and the other wire gets connected to the shield of the coaxial feedline. The moxon antenna is a simple two element parasitic array antenna. Build a 17 meter reduced size coaxial moxon rectangl, 3549, 22. This is a world wide web front end for a public domain program written by w4vp9kf using php. On this page i give details of how to build two different versions of the double bazooka antenna. Online coax loss calculators that use swr as one of the inputs certainly are convenient but can you trust the results. It is popular with amateur radio enthusiasts for its simplicity of construction and great performance. The antenna performs quite well on the 2 meter band, even though it was designed exclusively for the lower 3 murs channels. This yields a beam not much different than the size of a 2element 15 meter antenna, but resonant on 20 meters. The 1217mox is a compact moxon antenna for the two warc bands 12 and 17m.
This is antenna modeling software that uses excel for an interface and standard nec 2 equations. The method presented here is the first and simplest of the three versions to build. You will note the bottom half braid section of the coaxial dipole antenna is considerably shorter than a 14 wave length most likely due the velocity factor of the cable. 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. I just made a modified moxon using the velocity factor of rg8 coax. There are numerous limitations at my present qth location in pretoria, south africa. Signal reports from texas are of little use to to us in the upper northern hemisphere. This program has been derived from a public domain basic program written by. Postings on mailing lists show that very few of us have used calculated wire lengths and been happy with them directly.