How To Make A Loop Antenna For Ham Radio

Unfortunately, most neighborhoods seem to want an unobstructed view of utility poles, power lines and other people's houses, so they cut down most of the trees. My goal was to tie them high enough on a tree that no one could walk into one unawares, and low enough that high winds wouldn't cause that part. An Overview of the Underestimated Magnetic Loop HF Antenna It seems one of the best kept secrets in the amateur radio community is how well a small diminutive magnetic loop antenna can really perform in practice compared with large traditional HF antennas. Wrap the wire around the board 12 times to make a spiral of wire around the outside of the X. VHF 1/2wave vertical antenna for the 6-meterband (50 Mhz) RE-A50V12 By Guy, de ON6MU. ) The problem is not RF at all, but is a DC power supply ground loop back into the audio system. So, with ladder-line you can completely forget about resonance and SWR, until you get to the radio, where you use a tuner to make the match to 50Ω. If a radio's antenna is broken, use the following steps to make a simple new antenna out of household. 27 MB Horizontally Polarized Omni-Directional Antenna. This end piece will act as your connection to the radio's existing AM antenna. The goals of the project were to provide an optimized antenna for 40m, 80m, 20m, and all other HF ham bands, in that order of priority. An inexpensive way to begin is to build your own antenna tuner. wire strung around your house at rain-gutter height, plus. • Available literature on loop antennas is unsatisfactory for various reasons • Misleading/confusing • Incomplete • Not applicable to ham radio •Folklore • Just plain wrong (even Terman is wrong) • Even stuff published in Connecticut. THIS IS A NEW CHAPTER ON MY WEB. Loop antennas are also easy to hide in gutters or under shingles on the roof of a house. Conclusion: The PK's A-LOOP-TAM is an excellent performer in this category. The distance between the plates is 14mm (ca. While I am not here to make judgements, I will say that to do so would diminish the thrill of my QRP accomplishments. Categories Antennas Tags 2m , B1322W , EFHW , end-fed , Laird , Larsen , NMO , NMOWB150B. The knots weren't pretty, they seldom held, and heaven forbid you try to untie them. Stealth Amateur Radio is a book about enjoying ham radio with hidden antennas in apartments, condos and deed-restricted neighborhoods. Here is a simple 2meter Moxon Antenna you can build for indoor weak signal use. Googling around, I found a commercial design for $75 and a homebrew design that I could make for a lot less. How to Make a Homemade AM Antenna | Techwalla. Insulator for the loop antenna plenty of rope at the pine tree At the other 4 trees, the antenna wire can move freely through egg insulators, like the one shown. A loop cut for 3. Selected Antenna Books. If you are looking for a ultra-portable performer that doesn't compromise your ability to run 100 watts, consider the 100 watt Alpha Loop Antenna. You don't necessarily need the antenna to be resonant or "tuned". The antenna Q is very high because the radiation resistance. All of which doesn't answer the question of how you'd transmit on any HF ham band with one antenna. There is also an appendix on Anntenna Matchbox selection and another on Baluns, including how to build your own simple and effective balun for use with an Asymmetrical Matchbox. sigma ham radio antenna se-hf-x80 vertical radial free antenna 80 to 6 metres £ 88. build and adjust your loop to correct length for best swr in just one hoisting Click here to use the Calculators for Making your Own Wire Antenna written by Don, AC2RS. Clashmore Radio - Beverage antenna mediumwave DX by Martin Hall simple DIY project for a broadband loop antenna with a Mini-Circuits transformer. Dual-Band Sloper Antenna 39 63. I have looked all over the internet to try to find drawings on how to build a magnetic loop antenna that will cover at least 40-10 meters I know mfj makes one but you must understand when you live on 751. The features are not real different from loop to loop. I decided to follow on the ham-sexy mobile small loop antenna with this version meant for portable operation. Unfortunately, most neighborhoods seem to want an unobstructed view of utility poles, power lines and other people's houses, so they cut down most of the trees. First I was gonna try a dipole. WIKIPEDIA, The Last Word on zMake Feed Loop 1/5 size of Main Loop. Often, amateur radio operators are looking for alternative locations to install their antennas. In fact, you will likely enjoy it more by building your own simple equipment, and then making contacts with it. Generally the gain of a loop antenna is directly proportional to the area enclosed by the loop. Some ham radio stores may also have the May 2019 issue, in which my column is a preview of the USA and IARU Region 2 ARDF Championships in North Carolina. Home-Made Magnetic Loop Antenna for 30 Meters. For a while I used antennas for other bands with a tuner to get on 30. GigaParts - Your trusted source for Amateur Radio, Computers and More!. There has been an increase in new licensees lately. After evaluating my options, I decided that a loop antenna would be my best option. Dual-Band Sloper Antenna 39 63. TAK-tenna 40 to 10 meter Multiband Antenna. Resources listed under Loop Antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. THE N4UJW Donald Butler ANTENNA PROJECTS DESIGN LAB. A compact multi-band antenna by GM3AXX with interesting features that fits our MARS needs. If I had my druthers GE would still be making the Superadio 1 or 2. So, with ladder-line you can completely forget about resonance and SWR, until you get to the radio, where you use a tuner to make the match to 50Ω. You Can Build: A Compact Loop Antenna for 30 through 12 Meters QST May 1994, pp. It is probably best suited to a situation where a dedicated transceiver operates on a fixed frequency such as a single packet channel. Wire Antenna Design Lengths. The result is audibly better AM reception at my home in Mesa, Arizona. 6-Inch Whip Dual Band UV VHF/UHF 144/430Mhz Antennas SMA-F for UV-82 UV-B5 GT-3 BF-F8HP UV-5RA UV-5RE UV-5R by LUITON (2 Pack) 4. Building stealth antennas to keep prying eyes from detecting your communications resources takes some skill and a lot of ingenuity. An L-network. In other words, the best configuration would be a circle. I think the idea is to space the wire as far apart and as high as possible, at least for the "long wire" antenna you are making. Full Wave Loop Antenna. Once you gather the materials together, it only takes about an hour to get a loop in the air and connected. 10M Bent Attic Antenna - A Yagi No Less Hidden Attic Antenna -- From NU3E -- An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 40, and 80 Low Frequency Attic Loop antenna - from Bill Farmer W3CSW Attic Loop antennas - from William Hansgen The Flagpole Deluxe, by Fred Schnell W6OZF. Only one problem: most hams do not have space in their yard for 10 different antennas. 40m-10m DELTA LOOP ANTENNA - GU3WHN The Full Wavelength Delta Loop. TAK-tenna 80 to 6 meter Multiband Antenna. This antenna works great on the AM band because of the properties of these frequencies. Each mast has a pulley to facilitate raising the actual antenna, an 80-meter full-wavelength horizontal loop. I encourage all to make a little radio for yourself or build with your kids. The following procedure works for full wave loops, half wave dipoles, and quarter wave verticals:. There is also an appendix on Anntenna Matchbox selection and another on Baluns, including how to build your own simple and effective balun for use with an Asymmetrical Matchbox. A nice start to the project and a great excuse to start my magnetic loop build. The Classic Rain-Gutter Loop Antenna - Is it any Good? A simple technical look at an HF horizontal loop of. All the loops described here were designed and built by myself. If you are looking for a ultra-portable performer that doesn't compromise your ability to run 100 watts, consider the 100 watt Alpha Loop Antenna. I worked all 50 states and several countries with 100 Watts using the antenna on the 160 meter band. This loop is usually made from copper tubing with a tubing diameter as small as ½”, up to an inch in diameter. WIKIPEDIA, The Last Word on zMake Feed Loop 1/5 size of Main Loop. Here are a couple of pictures I took this morning showing my current Home Brew base antenna. It would have to be large enough so that it doesn't 'wilt' or fall over, but that's also a matter of how you mount the thing, or hang it. The number of antenna supports required depends on the shape of your antenna. While you can divide radio antennas mainly according to the power and range of their bands, there are subcategories that further provide you with a different range of ham radio options. An Indoor VHF Delta Loop. The easiest antenna to make at home is a resonant half-wave center-fed dipole. This article will explain two simple antennas. The videos show how quiet the antenna is on receive as well. On 40 meters, for example, a¼-wavelength vertical antenna is a metal tube or wire 33 feet high. Indoor Antenna Construction Tips. ) We have poorly installed connectors or defective cables. All the loops described here were designed and built by myself. Homemade Magnetic Loop antenna for 27 MHz Else known as Small Transmitting Loop or STL, this isn't a traditional "electric" antenna, because the "near field" is almost "magnetic". 040Mhz, listen for band noise/signal. The Horizontal Loop, also known as the Loop Skywire Antenna, is an old but very effective design. There is also an appendix on Anntenna Matchbox selection and another on Baluns, including how to build your own simple and effective balun for use with an Asymmetrical Matchbox. Welcome to Clif's ham radio connection. Am Loop Antenna Diy >>>CLICK HERE<<< Does anyone have a good and easy AM radio antenna DIY directions? you get the longwire or external loop outside the building where your desired signal. Each mast has a pulley to facilitate raising the actual antenna, an 80-meter full-wavelength horizontal loop. A typical cold water. The tuned loop antenna is more effective as a shortwave antenna when its width/height dimensions are a larger portion of the wavelengths it is intended to be used for. (3/2 λ) doublet with 31 (1/4 λ) ft of ladder line, then fed with coax. HF Loop Antenna DIY - Simple & Easy to Build Advantages: Simple & Cost Effective, Suitable for Indoor Installations, Compact in Size, and High Directivity. All of which doesn't answer the question of how you'd transmit on any HF ham band with one antenna. The objective of this article is to disseminate some practical information about. In we ham radio operators' continual quest for the perfect antenna system, we try some strange things at times, but often, the simplest is also the best. 00 of that in rentand about 100. Amazon's Choice for ham radio antenna Walkie Talkie Antenna 15. You will need enough cable to safely get from your radio to the antenna, figuring in the height of the feedpoint. The most common material for home building small ham radio loop antennas is common copper plumbing pipe. While I am not here to make judgements, I will say that to do so would diminish the thrill of my QRP accomplishments. Outdoor Antenna Electrical Projects Diy Tv Hams Tattoo Infinity Antenna Gain Ham Radio License Ham Radio Antenna Radio Frequency Construction and Analysis of a Low Cost Omnidirectional Horizontally Polarized Antenna for 144 MHz by Dr. We also sell Quality AM/FM, DAB+, shortwave and longwave radios. So what's new in 2020, in Ham Radio Antenna Designs? In the past several years, especially in the VHF/ UHF community, a new somewhat confusing method of rating antennas has appeared on amateur radio websites. I used / am using this MFJ-1786 antenna at various QTHs from a mountain top overlooking the Great Smoky Mountains National Park, to our beachfront condo 100 yards from the Gulf of Mexico to our current home in Potomac, Maryland 15 miles from the White House and Congress – and from all three locations worked a total of over 100. First you want to decide if you want an Inside Antenna or an Outside antenna. A perfect loop is arrayed in a circle, but a square, diamond or rectangle shape is fine, so long as the rectangle is not too “skinny. Don't get frustrated! Get creative! Building and trying antennas is half the fun of ham radio. W7IUV Radio Antenna Preamplifier Kit The RADIO ANTENNA PREAMP KIT (#PREAMP) from MTM Scientific is for building a low noise radio antenna preamplifier for the 1 to 30 MHZ frequency range. With the adven. Dual-band Loop Antenna for 30m - 40m 37 61. Instructions for Simple Multi-Band Vertical This PDF explains the antenna and has tips for its construction. How to Make a Homemade AM Antenna | Techwalla. Home-Made Magnetic Loop Antenna for 30 Meters. Post #315 I found this fascinating article by SV1CDY while I was searching for some multi-band loop antennas. The reason for this interest was that my son (2E0KGG) had moved to a new QTH and to help get him active on one or more of the HF bands we needed an antenna design that was suitable for use indoors or on a balcony. It's been several years since I last had a permanent base station set up and I wanted to get on the air. 1/2 wave antenna principle. 89 - Indoor Loop Antenna for 80m. This free movement, as well as some slack, is important as the wind will sometimes move the treetops around by a few meters. A compact multi-band antenna by GM3AXX with interesting features that fits our MARS needs. Precisely tuned high-power traps, carefully selected element lengths, and proper spacing combine to make the A4S the preferred antenna for your HF work! This is the premium antenna with all the features that you want. and it really impressive. The videos show how quiet the antenna is on receive as well. A small transmitting loop antenna, also known as a magnetic loop, with a circumference 10% of a wavelength or less, will have a relatively constant current distribution along the conductor, and the main lobe will be in the plane of the loop. Building an antenna and receiving ham and shortwave stations with SDR by In my previous blog on the topic of software defined radio ( SDR ), I provided a quickstart guide to using gqrx, GNU Radio and the RTL-SDR dongle to receive FM radio and the amateur two meter (VHF) band. Magnetic Loop Antenna Project The small magnetic loop antenna is a compact efficient antenna that is ideal for portable operation or limited spaces and can be improvised inexpensively. The objective of this article is to disseminate some practical. It's fed atop my roof on a short mast, which also holds up a 2-meter-and-up discone. If the receiver has a ground connection, try adding a short wire to a cold water pipe if it is metallic (PVC in my house), or to a driven ground rod. Don't connect the ALC lead to your radio yet. Tweeks are stronger and cleaner with the loop; anyway, the results are very similar, but the area occupied by the loop is about 500 times smaller. It's not always about maximum efficiency and performance, and it. The loop antenna is one of the most powerful antennas available for the amount of space it occupies, and has many advantages over other antennas, as we will describe below. How to build a 2 meter J-Pole T-cars virtual Elmer (swr adjustable clamps) 2 Meter J Pole Beam Jagi Tri-County. 040Mhz, listen for band noise/signal. A Magnetic loop antenna for 1-5 watts can be made fairly inexpensive. The delta loop has some gain, receives well, takes up little space, and is fairly cheap to make. Conclusion Small loop antennas can be very effective when care is taken in the design of the loop tuner and the loop antenna itself. These loops are made to enhance radio reception. Here is how I managed to get pretty decent results with a homemade antenna. Designed as a 20m antenna. There has been an increase in new licensees lately. Learn how to 'VERT a regular AM Broadcast Radio to receive 160 Meters! ('vert" is Australian for CONVERT, hi hi!) Make yerself a BASH RADIO, Blue - good on yer cobber! 'In A-Strylia, we shiyve with rise up liydes!' RCS Radio in Australia - lot of PC Boards for sale etc. If you couldn't get the SWR down to 1:1, try connecting the antenna tuner/radio to the other BNC connector and repeat the previous step. It worked as expected and now I receive both channels without issue on the TV furthest from the antennas. Boom = 30 in/76cm; sprial radiating element = 30 in/76 cm diameter; weight = 4 Lbs/1,8Kg. Um, yes, this is 168 pages of fun! Horizontal Loop Antenna Construction. com AM radio broadcasting uses amplitude modulation. W7IUV Radio Antenna Preamplifier Kit The RADIO ANTENNA PREAMP KIT (#PREAMP) from MTM Scientific is for building a low noise radio antenna preamplifier for the 1 to 30 MHZ frequency range. Simple Ham Radio Antennas: Delta Loop Antenna 40 through 10 meters. Buy AEcreative 10-160 Meter Amateur ham HF Band Radio Wire Loop Antenna Balun Unun DIY kit T200-2 Type 2 Iron Powder ferrite toroid core 16AWG 1. The high gain antennas needed for long distance reception are directional. Home Made Antennas. I live in a townhouse and have "Attic Antennas" exclusively so I need a good multi-band antenna with low SWR. End-fed, half-wave (EFHW) antenna. Resonant half-wave dipole. Because of AM radio's low frequency and clarity, it mainly broadcasts news, talk radio and sports shows. An Indoor VHF Delta Loop. With a good antenna tuner the antenna will work 6 thru 160 meters. This loop is usually made from copper tubing with a tubing diameter as small as ½”, up to an inch in diameter. Each mast has a pulley to facilitate raising the actual antenna, an 80-meter full-wavelength horizontal loop. Home Made Antennas. The Horizontal Loop, also known as the Loop Skywire Antenna, is an old but very effective design. 1296MHz 60 element powabeam yagi polar diagram 2006 Hummer H3 Alex Loop Amateur Radio Antenna Chameleon -P-Loop Ham Radio Antenna Ham Radio Repeater Ham Radio Repeater Antenna Ham Radio Tower Repeater Antenna Upgrade Tape Measure Yagi Beam Antenna Tarheel 200. Listed under the Antennas/Loop category that is about Resonant Loop Antennas. and the size of variable capacitor that i would need to tune with. Small wideband receiving active antennas have been widely used in amateur radio and commercial world for years. And a Yagi Antenna Calculator, A Cubical Quad Antenna Calculator, A Dipole Antenna Calculator, A Loop Antenna Calculator, A Wire Antenna Calculator, And a guide to many ham radio wire antennas. 27 MB Horizontally Polarized Omni-Directional Antenna. Antenna Videos 2m/70cm Vertical Dipole Antenna Easy to make, super easy no trim tuning Cubical Quad Antennas Ham Radio 2m Backpack Quad Antenna Coat Hanger / Copper Wire 2 Meter Yagi Antenna 2 Meter Yagi Antenna w/ Gamma Match Dipole and Inverted V Antenna Basics. Fortunately it is possible to build one antenna that can be used effectively on most of the bands, for example this 80 meter loop antenna. Mounting ham radio antennas in the attic. Introduction Of the many different antenna projects I have built for HF, the most interesting and rewarding project was the small transmitting loop. For the latest Amateur/Ham Radio news and information, please visit these web sites:. Antennas: Some General Concepts. Very close to a small loop antenna (but not necessarily near the open ends of the small loop where the tuning capacitor is) the magnetic field dominates. I have about 2,300 other hams as followers – so I get a great flow of up to date ham radio info, ideas and happenings that I share with my other ham radio followers. The reason for this interest was that my son (2E0KGG) had moved to a new QTH and to help get him active on one or more of the HF bands we needed an antenna design that was suitable for use indoors or on a balcony. You can mount the delta loop horizontally, vertically, or in a sloper configuration. Generally the gain of a loop antenna is directly proportional to the area enclosed by the loop. So what's new in 2020, in Ham Radio Antenna Designs? In the past several years, especially in the VHF/ UHF community, a new somewhat confusing method of rating antennas has appeared on amateur radio websites. Small wideband receiving active antennas have been widely used in amateur radio and commercial world for years. The two metre magnetic loop is a compact antenna which can easily be hung up under the eaves, the carport, or any other place where space is limited including indoors. After evaluating my options, I decided that a loop antenna would be my best option. 75/foot an excellent way to construct a low loss multiband antenna. And a Yagi Antenna Calculator, A Cubical Quad Antenna Calculator, A Dipole Antenna Calculator, A Loop Antenna Calculator, A Wire Antenna Calculator, And a guide to many ham radio wire antennas. I have looked all over the internet to try to find drawings on how to build a magnetic loop antenna that will cover at least 40-10 meters I know mfj makes one but you must understand when you live on 751. You can build your own loop. A Horizontal Loop Antenna for Shortwave Listening and Amateur Radio Use Overview: There is need for an antenna design which meets the following criteria- easily constructed with home tools; made from locally-available, non-specialty materials (as much as. The 30 meter band is pretty interesting. Clashmore Radio - Beverage antenna mediumwave DX by Martin Hall simple DIY project for a broadband loop antenna with a Mini-Circuits transformer. 88 ft and 44 ft are popular lengths. How to Make a Homemade AM Antenna | Techwalla. Hey—after lots of motorcycle posts, here's one on ham radio. It would have to be large enough so that it doesn't 'wilt' or fall over, but that's also a matter of how you mount the thing, or hang it. The size (diameter) of the conductor used for the antenna doesn't make a lot of difference. A nice start to the project and a great excuse to start my magnetic loop build. Simple Ham Radio Antennas: Delta Loop Antenna 40 through 10 meters. Thus, the more conductor surface area the more ground path conductivity. Indoor HF antennas - does it make much difference? Posted by Richard Newstead on 5th May 2017 It seems that more and more US amateurs are restricted in their activities by regulations imposed by Home Owner Associations (HOAs) that do not allow external antennas. Dual-band Loop Antenna for 30m - 40m 37 61. There is nothing mysterious about the Sky Loop Antenna. My EFHW 20m antenna is a decent performer, so I’m thinking that an 80m version could be an option. Multi-band with antenna tuner. How to build SM0VPO's 20 meter magnetic loop antenna The completed 20 meter loop antenna. My Loop Antenna November 20, 2013 9 Characteristics of Small Loop Antennas for HF Operation • Coupling loop ≈1/5 diameter of main loop for good impedance matching on all bands • Antenna is narrowband, operating at resonance of loop L and tuning C • Radiation resistance in series with loss res. Propagation-wise it more closely resembles the 40 meter band. Doublet – Multi-band antenna that is not resonant on a particular band. To compare mismatched feed-line losses we have to start with the antenna's feed-point impedance, and the line's impedance, then calculate the SWR, and finally, the loss of each feed-line-type. • Our regular antennas work by "recieving" the electric field portion of the radio wave. In fact, you will likely enjoy it more by building your own simple equipment, and then making contacts with it. This won’t actually result in an antenna system that covers all of the ham bands, but it can be a good start. Then, show the deployment pros, cons and how I use it. This would provide slightly more gain than a square shape. The patterns will give you a good idea how well the 6M HO LOOP will perform in your system. Mobile antennas have been around for decades, but assuming they perform the same is, sadly, a poor assumption as this comparison of Laird and Larsen VHF NMO EFHW aerials reveals. Very close to a small loop antenna (but not necessarily near the open ends of the small loop where the tuning capacitor is) the magnetic field dominates. We shot a couple of videos of them using the antenna in the contest and put them on our Ham Radio (Dot) World YouTube channel. This kit is based on the classic design of W7IUV, according to these Published Plans (Courtesy of W7IUV). The following procedure works for full wave loops, half wave dipoles, and quarter wave verticals:. You can build these antennas with common tools or purchase them from the many ham radio equipment vendors. Re: Making variable air capacitor for a mag. Loop antennas can work on other frequencies also but need some modification because of the frequency property differences. 90 - Double-Delta Antenna 80m and 40m. The antennas run at 5 and six feet respect ively through PVC "T" connectors along the back fence to the opposite corners wh ere they make a 90 degree turn forward (on each side). Here, You'll Find Links for High Gain Antennas Covering Hf-vhf-uhf. And a Yagi Antenna Calculator, A Cubical Quad Antenna Calculator, A Dipole Antenna Calculator, A Loop Antenna Calculator, A Wire Antenna Calculator, And a guide to many ham radio wire antennas. A four element antenna for the 50 MHz Amateur Radio Band by DF9CY After working three years with a homemade DL6WU type 6-element-antenna, I was intended to build something new as the old antenna decided to fall apart. Not all loop antennas are magnetic loop antennas. A magnetic loop antenna may be the answer and they are not as difficult to build as you might think. ) the ham on the receiving end will get the same signal level from you that he would get from a ham running a 100 watt transmitter into a simple wire antenna. You can build these antennas with common tools or purchase them from the many ham radio equipment vendors. Fed with a tuner right at the antenna, it is easy to hide the tuner or antenna coupler with foliage or structure. The first. motor to remotely tune the capacitor. The end fed antenna is essentially half a dipole, it uses a good earth connection to complete the arraignment. The Horizontal Loop, also known as the Loop Skywire Antenna, is an old but very effective design. A perfect loop is arrayed in a circle, but a square, diamond or rectangle shape is fine, so long as the rectangle is not too “skinny. Become a covert radio operator and get on the air!. In simplified terms, the larger tuned loop antenna captures more RF energy than a smaller one. in co pan in meds. Extended Double Zepp – Longer than a dipole. You have arrived! Over 100 crystal radio sets and tube receivers, and loop antenna projects and plans made by Dave Schmarder are available on makearadio. If I had my druthers GE would still be making the Superadio 1 or 2. If space is a premium at your QTH and appearance matters, let Hy-Gain open the door to one of ham radio`s most attractive and popular bands with the new AV-680. A great thing about ham radio is that you can spend literally as much or as little as you can afford and still enjoy the hobby. 293) from all vertical lengths if you decide to slope the antenna away from the vertical plane by 45 degrees; see calculator below. A perfect loop is arrayed in a circle, but a square, diamond or rectangle shape is fine, so long as the rectangle is not too "skinny. some novel loop disguise techniques. I His simple equations make it easy to lay out a loop to suit virtually any need. An inexpensive way to begin is to build your own antenna tuner. My original plan was to make it a fixed capacitor out of a length of coax for a single 40m frequency. You don't necessarily need the antenna to be resonant or "tuned". Basically there are 4 different kinds of loop antennas interesting to the amateur radio operator:. HF Loop Antenna DIY - Simple & Easy to Build Advantages: Simple & Cost Effective, Suitable for Indoor Installations, Compact in Size, and High Directivity. Finally, grounding the whole thing with a separate ground lead might also get rid of some noise. Small wideband receiving active antennas have been widely used in amateur radio and commercial world for years. Once you gather the materials together, it only takes about an hour to get a loop in the air and connected. I bought 4 mobile stick antennas for $20 and used two of them plus a structural T tie bracket (reformed with a hammer while in my vise), mobile mount stud for the hot leg, 3/8-24 bolt through male to male adapter from a spring mount for the ground leg. Am Loop Antenna Diy >>>CLICK HERE<<< Does anyone have a good and easy AM radio antenna DIY directions? you get the longwire or external loop outside the building where your desired signal. There is nothing mysterious about the Sky Loop Antenna. 93 KB How ET Really Called Home. VHF 1/2wave vertical antenna for the 6-meterband (50 Mhz) RE-A50V12 By Guy, de ON6MU. • Available literature on loop antennas is unsatisfactory for various reasons • Misleading/confusing • Incomplete • Not applicable to ham radio •Folklore • Just plain wrong (even Terman is wrong) • Even stuff published in Connecticut. My Loop Antenna November 20, 2013 9 Characteristics of Small Loop Antennas for HF Operation • Coupling loop ≈1/5 diameter of main loop for good impedance matching on all bands • Antenna is narrowband, operating at resonance of loop L and tuning C • Radiation resistance in series with loss res. Horizontal loops may be fed at any convenient spot. Here are some simple suggestions that may help your project. Staple the wire periodically to keep it from unraveling. Magnetic Loop Antenna I'd spent some time reading various articles describing the construction of magnetic loop antennas. " B-Square Engineering is the first to offer a Terminated Folded Dipole antenna, truly optimized for amateur radio use. This antenna is unlike most compact antennas with elements running parallel to one another and in close proximity making the elements are tightly coupled, while the completed antenna uses less real estate, there is a great deal of interaction between adjacent elements. Five-Bands No-Tuner Antenna 33 57. Re: Making variable air capacitor for a mag. Here are the details: a. A "portal" that hams think of as the first place to go for information, to exchange ideas, and be part of what’s happening with ham radio on the Internet. " If you plan to use the loop on multiple bands, simply make sure it is cut at least as long as needed for the lowest frequency on which you intend to operate. How to Make a Homemade AM Antenna | Techwalla. Because of AM radio's low frequency and clarity, it mainly broadcasts news, talk radio and sports shows. A nice start to the project and a great excuse to start my magnetic loop build. Driving the feed point with a 9:1 balun would also bring up the inductance on the feed point. One of my 2008 antenna projects was a square spiral loop antenna for the 80 meter band. Use only the large loop without the tuning to connect to a radio. The antenna is constructed using a 4-way electrical conduit junction box and 3/4″ PVC electrical conduit as shown above. So what's new in 2020, in Ham Radio Antenna Designs? In the past several years, especially in the VHF/ UHF community, a new somewhat confusing method of rating antennas has appeared on amateur radio websites. To build the largest and most complete Amateur Radio community site on the Internet. j-pole antenna super j-pole antenna cubic quad antenna arrow antennas dual band j-pole note: this antenna was disigned by arrow antennas and it works great. The Classic Numbers for All Types of Wire Antennas at HF. Building an antenna and receiving ham and shortwave stations with SDR by In my previous blog on the topic of software defined radio ( SDR ), I provided a quickstart guide to using gqrx, GNU Radio and the RTL-SDR dongle to receive FM radio and the amateur two meter (VHF) band. Great for travel! Indoor VHF Antennas. Without a doubt, the single most important purchase you'll ever make is the antenna. When fed from the center, a dipole makes for an easy impedance match to 50 ohm coax. 293) from all vertical lengths if you decide to slope the antenna away from the vertical plane by 45 degrees; see calculator below. If it is omitted, the receiver input is taken directly from the tuned winding,. The same signal, received by Marconi T antenna (11m high with 45m top) compared with the easyloop. As with all horizontally polarized antennas, performance is usually tied to height above ground but even at 10 feet the HO Loop yields an amazing 3. The same goes for me. My goal was to tie them high enough on a tree that no one could walk into one unawares, and low enough that high winds wouldn't cause that part. In Addition, Specific Models Mentioned in the Antennas Forum Like Diamond Antennas,comet, Yaesu, Icom, Watson Cushcraft, Mfj and More Are Here for Future Reference. Now to build it. My EFHW 20m antenna is a decent performer, so I’m thinking that an 80m version could be an option. Simple Ham Radio Antennas: Delta Loop Antenna 40 through 10 meters. I haven't had a chance to incorporate the balun in my several antennas yet but you notice I keep coming back to order products from DX Engineering since 2013 when I got into Ham radio I can rely on your products and prompt service. I feed the loop with ladder line and use an antenna tuner. The performance of this tuner was nothing short of spectacular on FM; the AM side was even more impressive, as it was designed to have an audio bandwidth of 20 Hz - 15 KHz -- the same as broadcast FM!. How to build a 2 meter J-Pole T-cars virtual Elmer (swr adjustable clamps) 2 Meter J Pole Beam Jagi Tri-County. G0KSC - Free Antenna Designs for Ham Radio. Don't get frustrated! Get creative! Building and trying antennas is half the fun of ham radio. So I need reception antennas which are less susceptible to these noises. The Ultimate AM Radio Antenna for AM Broadcast Reception. We used brass screws to hold the PVC together. In the article below, I’d like to describe the theory and the mechanical build process for a 160m-long multiband loop antenna, including its support system, tuning, and SWR analysis. Also included, and connected to the impedance matching device pictured above is an HF slant wire for regional NVIS comms while stationary. Dipoles can be fed directly with 50Ω or 75Ω coax, or with a 1:1 balun at the feedpoint. THE K4TR LINE OF WIRE ANTENNAS AND STAION ACCESSORIES "THE BEST QUALITY & VARIETY AROUND!". The loop will tune from 530 to 1710 kHz covering the whole band including the new expanded band. This loop was to be used to pick up RF9 and RF11. A few days ago, SWLing Post contributor, Robert Gulley (AK3Q) , pointed me to an excellent website by Harry Lythall (SM0VPO ) which is chock-full of various homebrew radio projects. It worked as expected and now I receive both channels without issue on the TV furthest from the antennas. The Delta Loop and 6BTV both terminate at a two position switch which allows me to switch between the two antennas very easily. Unlike a short vertical or dipole antenna, the loop presents an inductive reactance at its terminals so tuning and matching is conveniently accomplished with a single capacitor. Milazzo, KP4MD (posted 23 May 2012). HFpack is the international resource for ham radio HF portable, mobile, emergency communications, HF Pack Group, QRP, SSB, CW, Digital, High Frequency propagation, HF. So hacker of note and dedicated amateur radio operator [Jeri Ellsworth (AI6TK)] has started a video series devoted to building a magnetic loop antenna for the 160- and 80-meter bands. Sean Kutzko, KX9X, is using a handheld radio and a small beam antenna to make contacts via an amateur radio satellite while he is on vacation in Puerto Rico. 95 SIGMA Ham Radio Antenna SE-HF-X80 VERTICAL RADIAL FREE ANTENNA 80 TO 6 METRES. Loop Antennas for ham radio. You are looking at a AG6IF built 2 meter ham radio antenna. However, we can reduce the space needed to a quarter wavelength if we decide to use an end fed antenna. this is the best dual band j-pole ever built 2m - 70cm direct connection beam dimenisions. I played with cutting the coax to the right length and finally decided against…. First I was gonna try a dipole. It would have to be large enough so that it doesn't 'wilt' or fall over, but that's also a matter of how you mount the thing, or hang it. @K3TripleR is where you will find me – usually making several ham radio only tweets per day. Ham radio blog by OZ1BXM This month I would like to share an idea from my sketchpad with you. 8-30 Mc center-loaded HF whip, 51 Mc Whip, 28/27 Mc whip, GPS antenna under a radome on roof, 145 Mc 5/8 wave whip and VHF/UHF scanner whip. As the name implies, long wire loop is a marriage of the venerable long wire antenna and a horizontal loop. Tri-band Delta Loop Antenna for 80m - 40m - 30m 36 60. The design looked right, but only by making one could I find out how good it was. Need a really simple antenna for better indoor 2 meter operation? Try this vhf delta loop you can hang in any window. I feed the loop with ladder line and use an antenna tuner.