Loops a e have sides approximately wavelength but overall circumference delta loop is the same as an equivalent quad on the same frequency, i. A beautiful, huge, falling white ash laid my original loop to rest. Packaged with magnets for vehicle top mounting for 2 and 6 meters and a horizontal center support for mast or tower mounting. I wonder if it would works as well if it is wider than it is tall. Lately, i noticed that my antenna performance on 10 and 11 meter ssb is lacking, to say the least. Here is a great article on building your own 3 foot diameter loop from copper pipe that will fit in the attic of a single story home. The magnet loop antenna calculator program is used to calculate magnet loop. Poster voorbereiding op noodsituaties, amateurradio, software, projecten. Just because a corner fed delta loop is barely above the ground does not mean it wont work.
Five bands placed all within the same space that the 20 meter loop previously occupied. Lets see some antenna calculator and antenna design software that will help you design faster and better. This calculator enables you to test the design of an octagonal loop antenna and to answer what if questions until you arrive at a design that meets your needs without a lot of experience in electronics. Its also easier to make a 23 diameter loop for 20 meters more circular instead of square. Works either in standard and metric units, and let you choose on material, and loop. In part one of this series, i covered the use of one brand of commercially available, small transmitting loop antennas, also known as magnetic loops.
Build a magnetic loop antenna controlled by arduino. Loaded loop antenna 80 10 m low height narrow delta antenna for the 80, 40, 20 and 15 meter band. Here is a simple and easy to build antenna in a delta loop configeration that should make 10 and 12 meters lots more fun if you have a limited space situation or you just like the idea of a smaller than normal sized delta loop. At the end of the quarter wave matching section of 75ohm coax, you can attach a random length of 50ohm coax, again user supplied, which will be. This antenna covers 80 to 6 meters with low feed point impedance and will work with most radios, with or without an antenna tuner. Hf dipole antenna this antenna software will help you design a simple wire dipole antennas for 1 30 mhz. The formula for the length of wire required to make a one wavelength loop is. To support an antenna, i have no tower, and only two trees that arent too close to a house. Loop antenna calculators suggest that a loop of that size can be tune from 40 to 10 mtrs with a variable capacitor of 10 180 pf. From david, n5izu from david, n5izu portable all band antenna ikstic a multiband vertical dipole antenna which can be used in the field for quick setup and quick band change. Aa1do fractal quad for 10m by chip n1ir antenna projects 10m antennas from brian g3syc and ian m0bcg 6 meter antennas. Squalos are ideal for netcontrol, monitoring or as a general coverage antenna. The 2 meter full wave loop is so light, it can even be attached to most any nonconductive support with good tape. Home made high power magnetic loop antennas amrron.
Magnet loop antenna calculator antennas i1wqrlinkradio. The model was created assuming that the feedpoint impedance was 112. Delta loop for 40 and 20 meter band by ur0gt resource. The alpha loop is a 10 40 meter transmitreceive magnetic loop antenna, which handles 100 watts pep ssb, 50 watts cw, and 25 watts digital. The feed impedance of a delta loop is around 100 ohms so you will have to use a quarter wave length of 75ohm coax to feed this antenna which is user supplied. A ten meter vertical antenna for all license classes. I currently use a 75 meter full wave delta loop on the 6 through 75 meter bands with a tuner.
Click here to see more on transmitting loop antennas from aa5tb. The formulas for calculating the length of an impedance matching section are. This weekend i had a couple of hours spare, so i decided to give it a go using some 2mm multi strand wire cable, a dipole centre and a mixture of 75 ohm and 50 ohm coaxial cable. Half loop antenna for the 80, 40, 20, and 15 meter bands. It was a big loss for my stations performance, so i vowed not only to replace it, but to build a nested loop array for 20, 17, 15, 12 and 10 meters. Jvertical antennas for 10 meter band, a slim jim for 28 mhz with photos and plans. Maybe not as good as a real 6 meter antenna, but does work. Needed ant for 6 meter sporadice a 10 17 meter hanging loop antenna.
It can be built using the same type of tubing and hardware as the 2 meter antenna. The antenna can be used inside the house by suspending it with cord, heavy string, etc from the ceiling or attach it to a wall stud, the higher off the ground the better the performance. This enables the alpha loop to be heard and be more effective than any other manufactured loop. The numbers looked good on my mfj 259b analyzer, and my other indoor loop 50 ft rectangular loop continues to amaze me, so i know this loop will work whenever we get propagation again. Mfj969 amateur radio deluxe hf antenna tuner wbuiltin 4. Thus to make a long wire loop for, say, 10 meters, one could erect a onewavelength loop cut for 20 meters. My goal is to reveal, in some kind of logical way, my thoughts, methodology, and how i came up with the final result in.
The 20 meter vertical loop antenna will get you around the world if the conditions allow it. Aecreative 10 160 meter amateur ham hf band radio wire loop antenna balun unun diy kit t2002 type 2 iron powder ferrite toroid core 16awg 1. I recommend a different loop for use on 2010 meters if those are your favorite. Some call it a skywire loop antenna, some call it a w0mhs loop skywire antenna, nowadays its called a full wave loop antenna but it still is a force to be reckoned with. On the bands from 30 meters up to 10, its performance is very good and it can greatly enhance your shortwave listening on any frequency from 730 mhz. Please post a comment if you know other great software or links with information about antenna calculator and design programs.
Using my mfj269 antenna analyzer, i was disappointed to learn that the swr across the hf bands was not at all what id wanted. Jul, 2019 nice to see the 10 meter amateur radio band open on july th 2019 at 1415 ut ve3 beacon and some ham radio chit chat. 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. Full size delta loop for 20m i came across a simple delta loop design courtesy of dxzone found on the net some time ago and have been planning to give it a go for a while. Making my own ho loopstyle antenna for 1011m qrz forums. My first contact to australia was on my 20 meter loop, so it has to be working great. So, the loop diameter should not exceed about 1 mtr. Id seen all sorts of recommendations online about the length of wire for a 160 meter loop, and none of the were 160 meters. You can get a rough idea with modelling software but that software doesnt. An optimum installation would be where the antenna is deployed as a sloper with the high feed point end at 30 feet or higher and the low end at 10 feet or higher. I need an antenna for the for the following spectrum. Through these software, you can design various types of antennas like yagi, jpole, parabolic, quagi, super scanner, etc. Be prepared and able to communicate in case of emergency with the largest selection at. Here is a simple and easy to build antenna in a delta loop configeration that should make 10 and 12 meters.
W5gi mystery antenna is a multiband wire antenna that performs exceptionally well even though it confounds antenna modeling software. Ham radio 10 meter loop antenna, part 4 of 4 youtube. Reference loop, 40 meter full wave loop 36feet high over medium soil, opened opposite feedpoint to make reasonable feed impedance on 80 meters. Getting a big dx signal on 16010 m from one small, low. Somewhat ground independent being a loop, the 3dfl does not require a counterpoise or a ground connection. We do not recommend installing this antenna as a vertical due to users experiencing high noise rfi and unpredictable radiation patterns due to proximity of coax, which also allows. Rw3dkb loop balcony antenna all hf simple window loop antenna. Its just one end of my g5rv dipole, or sometimes called a dummy load. I would like to build a loop antenna for 10 meter but i dont know how to calculate the measurements for it john, hope you could help me. That alexloop is really a wonderful antenna for limited space and for an efficient upper band, portable antenna. In some cases my 99 cent loop antenna will outperform the antron 99.
Hf loop antennas for the 10 through 20 meter bands are small enough that they can be easily suspended vertically with their broadside radiation pattern pointed in a specific direction. The wonderbar antenna 10 meter antenna project electronics projects, gave. If we have a loop like this with a high feedpoint resistance, over 10 20 ohms, the antenna has very high loss. I cut 5 meter 14 gauge copper wire available with me at that time and bought two 10 feet electrical conduit pipes, made the antenna in just one hour and mounted it vertically on the deck. Im currently using two mag loops to cover 10 80 meters, efficiency drops at lower frequencies but still quite usable. Short dipole for 80m from 4s7nr 80 meter frame antenna from harry lythall sm0vpo. Operating the loop at 10 and 21 mhz by changing the length of the ladder line loop antenna 1. Cbradio mfj 1890 10 meter moxon antenna small backyard big signal shrunken 40 meter phased qu build it 2 meter tape measure yagi beam antenna kb9vbr j 10 11 meter moxon yagi beam cb ham antenna rhombic antennas v beam and inverted.
I have compared this loop with antron 99 at same height and obtained near equal signal reports from dx stations. The multi band hf loop antenna, a good performer on 80 and 4010 meters. The 10 meter 3dfl the 10 meter version of this antenna provides good performance and is just as easy to build. Ham radio 10 meter loop antenna, part 1 of 4 youtube. Hello from tommy in arkansas, just took at your design john. With a good antenna tuner the antenna will work 6 through 160 meters. The singleelement loop antenna is almost exclusively used on the low bands, where it can produce lowangle radiation, requiring only a single quarterwave high support. Jul 24, 2015 magnetic loop antennas for the radio operator with limited space pt. The reason the dimensions are as they are is so the feedpoint impedance is 50 ohms. It is fed from the bottom corner so that it is horizontally polarized. My goal is to reveal, in some kind of logical way, my thoughts, methodology, and how i came up with the final result in an easy to understand way. Coat hanger copper wire 2 meter yagi antenna 2 meter yagi antenna w gamma match dipole and inverted v antenna basics 10 1520m trap vertical antenna dave tadlock helps you build a home brew trapped vertical inverted v calculator thanks to k7mem martin e. Call it 24 feet for simplicity divided by 3 is 8 feet long each leg of one delta loop antenna. The magnetic loop couples to the to the magnetic field of the radio wave in the region near the antenna, in contrast to a monopole or a dipole which couple to the electric field of the wave.
At that height the base of the 40 meter delta loop is barely above the ground, but it does work. Save 6 meter loop antenna to get email alerts and updates on your ebay feed. The total length of a full wave loop antenna is the same as the driven element for a cubical quad antenna. Changing the dimensions will change the feedpoint impedance. Nec modeling software does not accurately model this antenna. Last month when there was a very good f opening, i was disappointed in hard i had to work to grab a contact. Petlowany threeband burner antenna trapless short vertical antenna resonant on 20, 15 and 10 meters, without traps, 12 and 17m with a tuner. I pulled the loop into the air, turned on the rig and instantly knew this design was a winner. Hf loop antennas for the 10 through 20 meter bands are.
An attic coaxialcable trap dipole for 10, 15, 20, 30, 40. My 80 meter delta loop s base is only 8 feet above the ground and i have worked vks long path with it. Loop antenna calculators suggest that a loop of that size can be tune from 40 to 10 mtrs with a variable capacitor of 10180 pf. On 20 meters that would probably be a better choice since dimensions are essentially double those of 10 meters. Pay no attention to the wire goingoff horizontally from the base. The loop easily loaded on 10 and 12 meters with a tuner, but as usual both bands were dead when i checked a few times over the weekend. Like most new generals, i started with a simple g5rv dipole antenna. For that article, i bought the very popular alexloop walkham antenna. A ten meter vertical antenna for all license classes by rich kr7w the intent of this article is to show how i built an effective 10 meter vertical antenna. I used two lengths of pvc pipe to form the horizontal elements of this simple, 10m loop antenna. My first 20 meter delta loop was mounted kind of low to the ground, but it did okay. This excellent article covers all aspects of designing a resonant loop antenna, examining gain and radiation patterns, and describing practical notes on how to build this antenna.
Many decent 57 reports with this 11 meter wire loop. The list will grow with your help so lets start and share the knowledge. Small loops for higher frequencies can be mounted either horizontally or vertically. Ham radio 63010 meter antenna software modeling results. In the first couple hours of having it up i was able to hear stations i could not hear before. Skywire loop antenna aka w0mhs loop skywire aka full wave loop antenna aka. In other words to increase radiation resistance, the loop has to be made spatially larger. This link is listed in our web site directory since thursday jun 27 2019, and till today delta loop for 40 and 20 meter band by ur0gt has been followed for a total of 186 times. The skywire loop is an excellent antenna they can be a bit of work to get up in the. This is to be expected when running an omnidirectional antenna however, and i am trying to build a new antenna that will do the following.
Alpha antenna 10 40 meter 100w base alpha loop portable antenna ham radio. Describe your experience with the par 2 meter loop. A ground plane antenna project for 10 meters band by n4zaw. We provide you with the latest news and videos straight from the amateur radio world. I recommend a different loop for use on 20 10 meters if those are your favorite bands, mostly because its easier to put up 71 feet of wire 14mhz with only 18 feet per side. The main category is delta loop antenna projects for 7 mhz that is about delta loop antenna plans for the 40 meter band. To be a magnetic loop, the loop circumfrence must be less than 0. Multiband loop antenna made after the design by sp7la for 80 40 30 20 17 15 12 10 meter bands with frequency ranges of 3500khz to 3800khz, 7000khz to 7200khz, 10100khz to 10150khz, 14000khz to 14350khz, 18068khz to 18168khz, 2khz to 21450khz, 24890khz to 24990khz and 28000khz to 29700khz with overall length of 82. 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. For several years and many contests, my 20 meter loop antenna continued to. L 1005f, where l length in feet, f frequency in mhz. Getting a big dx signal on 160 10 m from one small, low antenna chuck counselman, w1his i live on a small lot in a dense, inner suburb of boston and cambridge. 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.
Also, the designs i am going to show are for hf use in the 17 to 10 meter bands. Full wave loop antenna 10m thru 80m from western canadas ham radio yl site ke4uyp topfed 14 wave linear loaded vertical for 80m. The most common material for home building small ham radio loop antennas is common copper plumbing pipe. A 6 meter stealth antenna or you never know whats lurking in the woods gary depalma ac8ne. The is your source for news about amateur radio, shortwave, cb radio website. A magnetic loop is essentially a small loop antenna whose circumference is less than 1 10 of the wavelength. Magnetic loop antennas for the radio operator with limited space pt. All results may be presented in either feet, meters, or centimeters. What kind of 10 meter base antenna should i use for 10 meter ssb. The loop hangs from a corner of the square, so it is in the vertical plane. I worked all 50 states and several countries with 100 watts using the antenna on the 160 meter band. The following is an article which i wrote and was published in the february 20 edition of the central coast arc smoke signals magazine. View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation.