Homebrew 20 meter beam antenna


Thank you for visiting my Amateur Radio Blog. I value your comments and suggestions. Homebrew 20 Meter DiPole Antenna speaker wire. December 13, This is post in a continuing series of simple ham radio antennas. Thanks to "Ham Radio CQ" for this ultra simple and inexpensive 20 meter antenna. HF antennas don't have to be expensive to work well. Surplus parts and a good search through a local hardware store can often give you enough parts to make an effective HF dipole for any band of your choice.

Online vendors, such as Amazon, can supply you with wire and simple tools to assemble your "homebrew" antenna.

This video is easy to follow and takes you step by step through the design, building, and testing phase of creating a working HF dipole antenna for the 20 meter band. Here's a list of possible materials and vendors you can use to build this antenna: "As an Amazon Associate I earn from qualifying purchases. Post July 15, The G5RV is an excellent choice for the 20 meter band. Read more.

Amateur Radio Bicycle Mobile Setup. July 14, In this short, well-made video, "taverned" shows us how he used a mag mount antenna, a simple C clamp, and a basic ground system to convert his mountain bike into a mobile station. The project is straight forward, simple, and gives you emergency communications while you peddle down the road. Antenna for Condo Backyard-Stealth. July 02, In this video from AC2RJ, we see how some well-placed trees, a camera tripod, a telescoping fiberglass mast, and a "V" antenna can get you on the air without a lot of effort.I have a reasonably substantial 12 meter tall mast which is concreted in to the ground 2mx2m concrete base, which is 1m deep.

Turning radius is 5. Has good front-to-back rejection, is smaller than most of the others, but has a slightly lower forward gain.

A 2 element Fixed, Reversible Yagi for 20 Meters

Apparently they are very popular, especially for people with limited space. Much less forward gain than the other antennas though, although still fairly good front-to-back. There seem to be several videos on YouTube made by people who own these, but no reviews as such. My first thought is that your mast is going to need guying; I say that as a general rule as most masts I see in use are 1. That is a lot of moment on a mast that size, but again - you know your mast and I do not. My suggestion - that is something to give critical review analysis.

Now, as to the antenna: The Moxon is a sound antenna, though a two element Yagi may give a dB or two of gain. It will also be heavier and a larger turning radius. I had an A4S which really worked well. I think a tri-band yagi is the way to go. If you buy used, make sure to inspect the traps prior to puttng into the air. You may well find that a 1m depth of concrete is marginal for even the 3 element cushcraft. I am currently preparing to mount a lattice steel tower of the Versatower style and the concrete base and supporting tube will be 2.

Once the antenna and rotator get on top of the mast, the mast will suffer huge efforts at its base under the lightest winds. Under strong winds it will bend and fall down very soon. Dyneema cord is perfect for that.

The 5 el. The 3 elements one worked very well and it was smaller. You are now mainly interested on 20m, but having 10 and 15 as well in your beam will give you a lot of satisfaction by little more money and nearly not bigger size. Good luck with your project. As most people have said, the issue is going to be the wind loading rather than the weight.

The mast is 90mm steel box section which is around mm thick bottom section up to around 5. The mast is telescopic, so can be and usually is lowered. I always leave it lowered when not in use, and more often than not, I also keep it in the lowered position when in use. In my eyes, that narrows it down to two possibilities. Also gives me multiple bands. I might go for the Moxon but I think a bit more reading through the specifications is required with regards to the windloads before I make a final decision!!!

Gain is proportional to boom length. A small turning circle, ie short boom and bent or loaded elements means lower gain. Go for a 3 element monobander. The turning radius will be about the same as for a 2 element but the extra gain and directivity is important. Having a narrower beam means less noise and hence a better ability to hear the weak ones. The extra gain means you hear better and you will be heard better. I currently use a beam that is 2 elements on 20, 15, 10 m and 1 ele on 17 and 12 m.

For a small compromise antenna it works pretty well.

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I chose this for light weight, fairly low wind load and 5 band capability.I like your antenna. Any small one for my tv so that i can? What is full lenght of director, driven and reflector after overlap 25 cm? Thank you!

My Homebrew 3 Elements 20m Monoband Yagi. After used GRRV for all bands especially on 20m, I decided to build my own 20m yagi because I always monitor Indonesian stations got pile up on 20m while using beam antena. I don't have antena analyzer meter or SWR meter. I studied more about 20m yagi in the internet and asked a few 9m2 stations. They guided me how to make balun or coil and used for rotary dipole first. After that I put the rotary dipole on the 5.

UnbeleiveableSWR shown less than Very very succesfull, I around the world on 20m. Here I showed, how I built my 20m monoband yagi for all my friends who wanted to try. I know it's look bad and not nice but it's done the good job for me.

I'm not a good technician but I always tried. Take off the container, put some hard plastic and bind it with tape. For you information, I just insulated driven element. Reflector and Director were not insulated. Email This BlogThis! Igor L February 16, at AM.

Unknown December 6, at AM. William lailai November 29, at AM. Unknown December 4, at AM. Unknown December 9, at AM. Apix kdx April 5, at PM. Unknown May 22, at AM. Subscribe to: Posts Atom.This is one of my first posts from when I got licensed.

Lfa antenna 11 meter

I have left it here as it may be of use to someone…. I have wanted to give HF a try since getting my licence, but have not got round to putting up an antenna like the G5RV. So I decided to try and make a dipole, that will fit in the loft, for 20 metres. The loft here is quite small, so I used two 1. I started off with about 6 metres of wire per element, with 15 turns on each bottle and cut them bit by bit, until the antenna analyzer showed it resonant at I even left the two ends drooping down a couple of feet.

Running 10 watts, I replied to someones CQ call, and was totally amazed when I see my callsign coming back! Furthest contact so far with this antenna and 10w is Guatemala. Here is some pictures, one with flash one without.

I have used only thin wire, so its quite hard to see, also its hard to try and fit it all in the picture, but it gives you some idea! One of the loading coils. I now know that these could have been much smaller if they were close wound! Your email address will not be published. Please complete some simple maths to prove you are a human! This site uses Akismet to reduce spam.

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It is mandatory to procure user consent prior to running these cookies on your website. I have left it here as it may be of use rywire sub harness someone… I have wanted to give HF a try since getting my licence, but have not got round to putting up an antenna like the G5RV. Get drinking that water! Share this Leave a Reply Cancel reply Your email address will not be published.

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Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website.Labels: 7 elements LFA yagi.

Here is a reference to free yagi designs by G0KSC. The vertical spars The antenna in the center of the two meter array is a 40 element collinear for MHz. The last time I heard conditions as good as they were, was back in the 80s when I was an avid 11 Meter DXer as well as a spotty faced teenager. Projecting this antenna has continued for 1 year. Learn More. One of them is the Antennas. The Front to Back is good, very closed at the back. The 10 Meter Band consists of frequencies stretching from Innov 11 LFA 1.

Camden County South Jersey. Edwards Lionel H. Comet CBS A. Building a 15 Element Yagi for 2. The antenna is super wide-band too with an SWR of less than 1. Since 17 meters covers the frequency range of Keep that in mind if.

A Practical, 5-band Homebrew Wire Beam

This page contains construction details on a 2 metre mhz vhf yagi beam antenna designed for portable use. It acts as a transformation system in the range of to 50 Ohm for the low impedance structure of the Yagi, which is the secret for the higher gain as with the two systems described above.

Homemade 11 meter antenna Homemade 11 meter antenna. Posted by Daniel at AM. Base Station Antennas: Base stations are a great way to stay connected, especially during an emergency. Just copy and paste the below code to your webpage where you want to display this calculator.

The MFJ is a …. Furthermore, since the apparent wave earth reflection point is usually distant from the antenna, it is not important what the earth looks like directly under an elevated antenna. For best front to back ratio it is recommended that a yagi be constructed with one of the following numbers of elements - 10,14,19, Set up the remote test antenna on the tripod.

The gain gradually declines to Instead of a continuous rise in gain across the band, the 6-meter version of the design shows … Foxtrot Bravo is a frebanding DX group on the 11 meter band. It is a flat loop that has not only the task to improve the patterns.

The dipole lies flat on the boom at the same level as the parasitic elements. The longest wing has a total length of 14m and has a length of 5. With Yagicad it is possible to enter a base design from scratch or use one of a number of saved well known designs. Non-resonant antennas B.For many of us, it is a real thrill to string some wire from some trees or bolt together some aluminum and noticeably improve our ability to snag signals out of the sky or fling RF into the ether.

Let's all agree that there is little that is new in the area of antennas. And what there might be is probably beyond the reach -- technically, economically, and engineering-wise -- of most of us. But we can always borrow, filch, modify, and just plain steal from work that has gone on before us and adapt and develop antennas that meet our specific needs. Antennas that give us that thrill when they work better than whatever we were using before. Or teach us something if they are not.

So, I wanted an HF beam. My vertical, my G5RV, my skywire horizontal loop, and my multi-band dipole all do a reasonably good job from through 6 meters. They enabled me to work more than countries with only watts since I returned to being active in But I yearned for more. And I craved a new project. The MA-5 covers 10 through 20 with two elements on 10, 15 and 20 and is a rotatable dipole on 12 and But the lure of building something on my own kept tugging at me.

Instead, I decided to go out and build myself a "beam. I had a few specifics in mind when I started researching the various possibilities for building an HF beam antenna. And the biggie, something I could build myself, since I don't have access to a machine shop and I do plywood scarf tool five thumbs on each hand.

The Internet provides all the information one could want for researching various possibilities, plus there are many good antenna books that have suggestions as well. I looked at Moxons, quads, spider beams, vertical arrays, and more. Each had its good points and several of them seemed to be within my capabilities to build.

Then, as I learned more, my interest returned to a particular antenna I had considered when I first returned to the air three years ago. They are manufactured in monoband and 5-band versions. Some of When does ulta throw out their makeup models are specifically designed for portable operation and are great solutions for those who like to operate from distant mountaintops and want a good directional antenna to carry along and quickly set up.

The specs on Mike's web site are quite interesting and seem to be honestly depicted. I see no reason to doubt their accuracy. Well, the "hex" seemed to meet all my criteria. Now, I had to decide if it was something I could build myself or if I should start hinting to the proper people about what a great Christmas present Traffie's creation would make.

As designed by N1HXA, the 5-band hexbeam consists of three pieces of wire for each band. Two of the wires are deployed as a center-fed radiating element and the other acts as a director, making it a two-element beam for each band on which it is designed to operate. The elements are strung around six Fiberglass spreaders that act as supports. The longest wires, the meter elements, carry the tension and pull the spreaders up into a configuration that looks for all the world like an upside-down umbrella without the fabric covering.

The shorter wires that make up the elements for the other bands are strung around the upturned spreaders, spaced a distance apart so there is little or no interaction between them.My website uses JavaScript for menus etc.

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Latest page update: 25 Sept added ref. Previous updates: 9 April expanded Uda-Yagi section2 July added ref. Inwhen I was between jobs for a while, I decided to build an HF antenna with more directivity than a simple dipole.

Installation at my QTH basically had to be on my terrace, so space is rather limited. Such a directional antenna requires at least two elements, a full-size antenna for wavelength over 10 mtr will not fit, and 10 mtr is usually not my favorite band. So I narrowed it down to a simple half-size 2-element beam antenna. In its simplest form, this antenna consists of a driven element typ. The EM waves radiated by the driven element induces a current in the passive element. This induced current causes the passive element to also radiate waves.

These waves combine with the waves of the driven element. This is illustrated below for various lengths of the passive element and various distances between the active and passive element both are assumed to be oriented vertically in the figure below :.

Duringhe published his research in about a dozen articles in the Journal of the Institute of Electrical Engineers in Japan. Inhe co-published a first article outside Japan USA, ref.

The latter article also proposes to use this type of antenna for directional radio beacons. In December ofYagi patented the antenna system in Japanlisting himself as the sole inventor. The latter has Radio Corp. Eversince, this type of antenna system is commonly referred to as a "Yagi-Uda" antenna, or even worse, just "Yagi" antenna In its simplest form, the Uda "beam" antenna is a 2-element antenna.

It has a single radiating element that is "driven", i. The latter is not driven. The passive element is a mono-pole: basically a rod that is slightly longer or shorter than the driven element. This element is placed at some distance typ. The two elements are electro-magnetically EM coupled: EM radiation from the driven element induces current in the passive element.

This way, the passive element "feeds" on the driven element. This is why the passive element is also referred to as a "parasitic" element. In turn, the induced current is partially re-radiated by that passive element.

The waves that are radiated by both elements, combine in all directions - they are superimposed. This results in a 3-dimensional interference pattern around the antenna. Due to the spatial distance, there is a phase delay between the radiation from the driven element, and the re-radiation by the passive element. If the passive element is slightly longer than driven element typ.

A good three elements on 20m has to be at least 20' long, you can find good designs in the antenna handbook I think. Even if it's a three. cvnn.eu › catalog › Antennas › 20M › 20_meter_Yagi_antennas.

2 element Yagi for 20 meter - This antenna was designed for the CQ WW CW at EA8URL. All elements are made out of fishing rods with an insulated copper. A full-size (= ½λ) dipole antenna for the 20 mtr band spans about 10 meters (33 ft).

Searching for a half-size half-size 2-element Yagi, I. Home» Homebrew» HF Antennas» 4 Elelemt Yagi Beam Antenna for 20 meter On picture 1 you can see the GK 4 element 20m yagi on a 40ft boom on the.

After used GRRV for all bands especially on 20m, I decided to build my own 20m yagi because I always monitor Indonesian stations got pile up on 20m while. However, booms of wavelength can provide about.

dBi. my own antenna. The result is an easy-to-con- struct, two-element beam optimized for. So I narrowed it down to a simple half-size 2-element beam antenna. In its simplest form, this antenna consists of a driven element (typ. a ½ λ dipole) and one. You may remember my homebrew 20/10 homebrew yagi that met its up on having a directional antenna for 20 meters, due to the following. Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an.

Special page devoted to. 3- Elements YAGI Antenna for the meter Band. A Three - Element Yagi Mini-beam. Using "Hamsticks" For 20 Meters Since there are several different "Hamstick" type antennas out there. A tutorial on the Yagi antenna with construction of a two element beam for, or meters. The Building-Supply Yagi · Members Only. Hi. I want to homebrew a 5, 6, or 7 element 20 meter full sixe beam antenna. I have done several searches and come up with a few sites.

I. I'm looking to work DX as well as chase SOTA on 20m. I'm seriously considering putting up a beam (or some kind of directional high gain. The antenna was mostly better than across all bands. 20 meters was a bit high at the upper end of the band. Still, I thought that was. MAY 11TH, - A PLAN FOR HF LOG PERIODIC ANTENNA WORKING 10 20 METERS BAND May 8th, - A homebrew Hexbeam antenna built in 3 hours How to build. I have wanted to give HF a try since getting my licence, but have not got round to putting up an antenna like the G5RV.

So I decided to try and make a dipole. antenna BuddiPole HomeBrew -- From W3FF HF- and VHF-Yagi-antennas - HomeBrew -- From DK7ZB Portable dual-band antenna for 20 and 10 meters.

project came out very nice. It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands". 20 meters - a very crowded, very competitive daytime band at least 70 feet from towers over 40 feet tall supporting a Yagi antenna.