Theoretical considerations and preparations. It would load on 160 but did not xmit really work well but did receive very well on that band, very low noise receive antenna. Around the first toroidal core a 1:1 current BalUn is built up, creating the transition from unbalanced (coax) to balanced (the antenna). great time with it.When I first built it, I fed it from the Length of a full-wave 80 meters 133-j50 40 meters 272-j105 20 meters 279-j80 Since you specified that you need to run coax into your shack, it is best to transform the impedance at the antenna in this case and run coax all the way into the shack. galvanized water pipe. A classic. Debugging SM0VPO's spiral loop antenna build. This antenna is also rated at the full legal limit on all modes. At 3.6 MHz I actually have excellent values with 56 ohms and SWR 1: 1.5. I even had plans for a higher and longer corner.I have used it on most bands but my favorite is feedline and how high you install your antenna. The 4:1 balun was chosen because the impedance of the feedpoint of the antenna for each band is: Since you specified that you need to run coax into your shack, it is best to transform the impedance at the antenna in this case and run coax all the way into the shack. Since a few months ago in our OV G25 the antenna analyzer fever broke out, I wanted to not only simply set up the intended antenna, but also theoretically calculate with antenna programs, measure the antenna after the set up with the Anlaysator and thus compare theory and practice. Length of an impedance matching section made with 75-ohm cable with a cable velocity factor of 0.80 (foam dielectric): Formulas The formulas for calculating the approximate length of a full-wave loop antenna are: Full-wave loop in feet = 1005 / frequency in MHz Full-wave in meters = 306 / frequency in MHz . I know it tunes 40 and 80 meters quite fast! Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. They are quieter than a dipole or a vertical, have a broader bandwidth and will usually out perform a dipole antenna.To determine the approximate circumference in feet of a full wave loop antenna use the formula: The feed point impedance of a full wave loop antenna is theoretically in the vicinity of 120 ohms and requires a 2:1 impedance transformer (for single band loops or a 4:1 balun to match on multiple bands) with 50 ohm line. Ham Radio operators review new sites every day since 1998, for potential inclusion in the Directory, and to evaluate the best place to list them. @enzo I see now that I misinterpreted your layout for the antenna. In the short time (before the wind damaged my horizontal loop) I had both the delta and the horizontal loop up I found them to each have different strengths and weaknesses depending on the band and propagation at the time. My preferences have now changed, so I had to do something for the two bands. i have a horiz loop 280ft of wire fed with ladder line and up 70ft.does not tune up great on 160m but works great on 80m to 10m.signals equally as good on 17m as a 12element log at 90ft.great antenna and simple, i have a horiz loop 280ft of wire fed with ladder line and up 70ft.does not tune up great on 160m but works great on 80m to 10m.signals equally as good on 17m as a 12element log at 90ft.great antenna and sim ple. 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. Is it better to run 300 or 450 ohm line down and then place the balun near the entry (with a short run of coax) -- or is it OK in this case to mount the balun in the air with 50 - 60 ft of coax? Could you or anyone add some information on the choice of balun? To build this antenna you need a lot that is at least 100 feet across. A 4:1 balun should do a reasonable job of transforming the impedances to the earlier listed 50 ohm SWR values. In terms of my property, the Y-axis is a parallel line to my eastern property boundary and the X-axis to the northern boundary. 80 Meter band dipole antenna kit, including 150 Watt 1:1 BalUn, 80 Meter band dipole antenna kit, including 800 Watt 1:1 BalUn, Pressure compensation valve, keeps moisture out, 30 meter Quadloop antenna including 1:2 BalUn DIY kit, 15 meter Quadloop antenna including 1:2 BalUn DIY kit, 12 meter Quadloop antenne inclusief 1:2 BalUn zelfbouw kit, 10 meter Quadloop antenna including 1:2 BalUn DIY kit, 12 meter Deltaloop antenna including 1:2 BalUn DIY kit, Winding wire 18 AWG 4x 85cm PTFE 19 x 0.25 mm copper Silver plated, Core wrap wire 1.5 mm 1.5 mtr. **I worked all over the USA happy to say this simple antenna far exceeded my expectations!What I night.It is amazing how much louder some stations are on It will be about equilateral. Each leg is 94.37 feet. This antenna works as a Full Wave Loop on 80 Meters and also works as a 2 wavelength open loop or Bi-Square on the 40 Meter band. That's what I really like about this Often times on 80m I have a 80 Meter Delta Loop up 50 feet fed with RG-213 and a 4:1 balun. All information, images, product configurations, and documents on this website are the sole property of Palomar Engineers, Inc. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Palomar Engineers, Inc. 1-3/4" Nylon Pulley and 1/4" Spring Hook Set for antenna wire installation, 160-10 Meter Loop Antenna System with 4:1 Balun and Choke Combo, 1.8-30 MHz, 1.5KW/5KW PEP, 40-6 Meter Loop Antenna System with 4:1 Balun and Choke Combo, (40, 20, 17, 15, 12, 10, 6 meters) 500/1.5KW/5KW PEP Options, 50:100 (2:1) CUBE Balun/Unun 1.8-61 MHz, 2KW/5KW, Loop Antennas, 50:112 (2.25:1) CUBE Balun 3-30 MHz, 1.5KW/3KW/5KW, 50:200 (4:1) CUBE Balun, 1.8-61 MHz, 1.5KW - Loop, OCF, Folded Dipole useful to 200 MHz, 80-10 Meter Loop Antenna System with 4:1 Balun and Choke Combo, 3-30 MHz, 500/1500/5000 PEP Option, Bullet 50:100 (2:1) HF Balun, .1-61 MHz, 500/1500 Watts PEP, Loop Antenna, Bullet 50:200 (4:1) HF Balun, 1.8-61 MHz, 500/1500 Watts PEP, Loop, OCF, ZEPP, Bullet Hybrid (4:1) HF Balun + 1:1 Choke, 1.8-61 MHz, 500/1500 Watts, OCF, Loop, Folded Dipole Antennas, HF Loop Antenna Wire Kits (160-10 meters), Hybrid 1.5:1 Current Balun + 1:1 Current Balun in one enclosure, 1.8-61 MHz, 1.5/5KW PEP - Loop Antenna, Hybrid 2:1 Current Balun + 1:1 Current Balun in one enclosure, 1.8-61 MHz, 1.5/5KW PEP - Loop Antenna, MAXI-CHOKER Coax Line Isolator/Choke, 1-61 MHz, 3KW/5KW, up to -60 Db Common Mode Rejection, Static Bleeder Option, Maxi-Choker, 1:1 Line Isolator 3KW, 7-54 MHz Optimized for Wide Band Log Periodic, HF & 6M Beams. Until Monday, 12/17/12,when a 102 MPH windstorm hit my QTH I had four HF antennas at my QTH in Eastern Oregon. 6 or more s units quieter on receive than the xmit L. I have been using an 80M horizontal loop on and off for the last 20 years. In the higher bands, the directional characteristic and Verzifpelung correspondingly more pronounced. circular loop is "ideal", but impractical for most hams. an antenna that has not been spoken about often enough. I quickly found a suitable BNC adapter on PL, and off we went. This is probably the best 80 - 10 meter antenna I have ever used. http://www.arrl.org/arrl-audio-news (a wee, If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=MXTYTytR56A. The center feed optimizes the results compared to a corner feed. space! I always use 300 ohm tv twinlead that is still being sold at most Radio Shacks in the USat least for now still being sold. I'm amazed at how a "shorted-out antenna" can even work at all more or less so well! Trying to avoid buying a tuner. I value your comments and suggestions. Brought the twin lead into the shack to the tuner via the built in 4:1 balun. Will try to get it in the air! I have read much about impedance, SWR, quarter wavelengths, and I simply do not have the background to make sense of it. The direction of fire is broadside to the antenna. 20-21 In fact, the upper band values improve here, but the SWR gets worse at 80 meters. Repeater HF & ShortwaveLicense StudyLinksMidi MusicReading RoomRepeater Basics Maybe it has to do with the unequal sides and tilt? Canadian of Polish descent travel to Poland with Canadian passport. Here's a way to use Amatuer/Ham Radio while you work on shedding a few pounds in useful exercise. N6JSX: A regular, traditional 160 ant such as an inverted-L smokes this ant on 160.as it should. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Feed point is approx 18-20' AGL and the Loop is mostly a square box. bands.After gleaning all the info in the articles referenced below, requires no special feed networks, only a transmatch, coax and some a lot of detail on gain (see ref #4 below) in his article so I won't get I got the idea from the W1FB Antenna Notebook. weatherproofing.For antenna insulators, I used porcelain electric How does the performance of the vertical delta loop compare to an 80 meter horizontal square or rectangular loop? I should add to my previous comment that I feed my loop antenna with balanced feed ladder line required for the tuner mentioned here. http://www.arrl.org. Tuning the 40/80 meter coil loaded inverted v dipo EFHW 49:1 Transformer Construction and Deployment, Four Element Yagi Antenna for Ham Radio 70cm Band, HF Indoor Loop Antenna DIY-Simple & Easy to Build. After a week I decided to feed it from the I lived down Morello Ave a few blocks from (just past Viano) you years ago and never had any ugly wind problems there! I did learn however, both 300 wire to the top of masts (Figure A below). antennas, not only is the old saying "the higher the better" true, but Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Often a quarter wave coax cable of 75 Ohm is used as impedance match for delta loop antennas, but it is then forgotten that the coax cable in many cases becomes part of the antenna, resulting in a disrupted radiation pattern. percentsplit equally either 3x3 signals or simply "no contact at Learn more about Stack Overflow the company, and our products. versions, say 75% of a wavelength may also work fine if you don't have the I use a 1:1 balun. Even the resonance point was exactly at 3.6 MHz, so I randomly sized the antenna wire randomly from the start. All stainless steel, 600 Watt, with proper strain relief. /* Ad banner 160 x 600 */ During the first 3 months of The 80 meter Deltaloop antenna kit contains all the components to create the ideal Deltaloop antenna. WA4FXT, here is the rule of thumb that I use. I wasn't sure if all "floaters" would With the SWR button you can now display the resonances of the antenna structure over any frequency range, as shown below. wire used. version in the future as mentioned in the article. diagram. (www.cebik.com) Do a Am I working any DX with ityes! As a comparison, I have shown the results of the Deltaloop with chicken ladder below, with very interesting results and conclusions. the auto-tuner on my TS-570D since my Tucker 1.5 kW tuner easily handled Much has been printed stuff to build it was on hand-no cost! Other forms would be conceivable, then just with appropriate compromises. InformationHam Hints HumorHam Radio News!Post ReviewsProduct ReviewsHam Radio Videos! This length I had in wise foresight already off, i. I had a bit diverted as a possible reserve. This antenna is resonant at 3.650 MHz-~-~~-~~~-~~-~-Please watch: "Minelab Manticore fir. watt manual tuners (MFJ and Vectronics) that I used took some time to tune 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. Never will Go back to a dipole or G5RV again. Many BalUn manufacturers only look at the impedance matching but forget to look at the common mode current attenuation. Our OV home deltaloop uses a huge matchbox and chicken ladder, which are credited with excellent features, but I wanted to avoid them for the following reasons. However, if that's not practical then run balanced line as far as you can and terminate it into a balun followed by the shortest possible run of coax to your rig or tuner. As expected, the antenna radiates flatter with increasing frequency. the loop as compared to the Carolina Windom. Works great 80 - 10. The DXZone is the largest human created and maintained library of web sites dedicated to Amateur Radio, currently lists 20.000+ links organized into 600+ categories and subcategories. The diagram nicely shows the resonances at 3.6 MHz and their multiples. Comment document.getElementById("comment").setAttribute( "id", "a83b46cfc120fc48eba63655d8cdb058" );document.getElementById("bf02c2270e").setAttribute( "id", "comment" ); Save my name, email, and website in this browser for the next time I comment. 7,95 Germany The 80 meter Delta Loop is mounted in a vertical plane. Even up on the hill in Martinez it wasn't bad. eHam.net provides recognition and enjoyment to the people who use, contribute, and build the site. Why not equip your bicycle for 2 meter/70 cm mobile operation? critical according to my results.In my opinion, when constructing 20m.I am primarily a cw op but I do get on phone as Say you don't have the room for a full wave antenna then . u-bolt to "float" (ref. Many Ws and VEs were also RG 213 coax (chosen for strength, durability and because I may use an amp) terminates on the Technical assistance provided by Zach. Don't let deed-restricted properties (HOA/CC&R) stop you from enjoying Amateur Radio. Dimension "B" is the length of antenna wire called the base (width) of the antenna. https://bigislandarrlnews.com. At 7 MHz I have theoretical 128 ohms and SWR of 1: 2.8. Here I have divided the two long wires again into 2 parts, because I wanted to simulate the intentional sagging of the long wires here. 43-45. Optimising a small magnetic loop with 1:1 SWR but little radiation, Using LMR400 and RG8x in the same feedline, UHF cubical quad VNA analysis interpretation, Actual Impedance of a folded dipole at resonance. On 80 meters it equals or better every other antenna mentioned. It was an 80 meter delta loop, apex up, with the top attached to the top of a 60 foot tower. Hey Jerry - I'll bet you didn't see any winds like that back in Martinez, eh? lived on 10 acres in the country, I decided to make my horizontal loop In fact you can find this triangle or Delta configuration, in the ARRL antenna handbook 19th Edition . air and about a foot or two away from the masts, I merely tied off the (I realize the software may provide a better answer, but it does not explain things). Ubuntu won't accept my choice of password. How high off the ground? W5E2 into column 1, i. so wire1 / end1 meets wire5 / end2. The 40m band looks similar, but with a worse but acceptable SWR without impedance matching: Below are the EZNEC calculated directivity diagrams for all shortwave bands. Trapped dipole for 40-80-160 meters. Yes I am mostly interested in data and CW. After getting fit in theory, I started building the antenna. This is where the standard is set. Do you already have specific dimensions in mind? The 80 meter Deltaloop antenna kit contains all the components to create the ideal Deltaloop antenna. Like this post? Would appreciate if you could run the model once more with it equilateral, perfectly horizontal at 60 ft, corner fed. For some weeks, I had somehow felt like working on shortwave, after having been QRV primarily on the VHF / UHF bands for the last few years to operate via satellites, ISS and Moon (EME) (see my homepage). I fed it with 300ohm TV twin lead at one of the bottom corners. top (apex about 50 feet or so). In my old edition of the Rothammel there is not much in it, it is limited to loops with a vertical arrangement, such. using the antenna 4 years. I am new to HF. It was perched on a 2.5 inch OD, 1/4 inch thick wall, moly steel mast and turned by a Tailtwister. As a wire length, I roughly took the values from the EZNEC calculations, but I only measured those with my stride length. on signals mentioned above over the two-day period of tests.I am Hosting. What is the height? the pulleys) for final wire sag adjustments. If you attempt to use it on other bands, the SWR will be relatively high and there will be significant loss in the feedline. If, however, you intend to use it as a multi-band antenna (an 80m loop works very well on the higher bands) then it's imperative that you use a balanced line feed to keep losses due to SWR at a minimum. The antenna is a 60 foot dipole, bent into a rectangle, and fed at one corner with Radio Shack TV Twinlead into a MFJ 4:1 balun and tuned with a LDG Z11 Pro autotuner. As indicated in the handbook, even with me the antenna cost a penny, because I could take everything of my crafting box. Overall I thought this was a fantastic antenna. https://www.youtube.com/watch?v=TqE_W_0Le0k&ab_channel=RichRodgers. use, (October through December), 75 percentof my QSOs on 10 and 20 Experimenting with wire antennas I use "about" because exact numbers are not that critical according to my results. Anyone do the same Delta but horizontal? tower and three masts, each 35 to 40 feet long, made from 2 inch It is fed at the top (90 feet) with RG 213 (200 foot run to the shack) through a 4:1 current balun. Do to take off angle(w&s=higher) I believe is why I have a little trouble getting into the far east, but most of the rest of this rock is not a problem. Hi John,I just wanted to let you That's very interesting that it continues to be a "cloud warmer" at 40m and 20m, contrary to the conventional knowledge of delta loop behavior. duty, I could pull it tight. I regret only I only had I use window line from the feed point into my shack and then to a 4:1 Balun in my shack. Once I re-build the horizontal loop I do intend to do some comparisons. In fact, the performance of this 80 meter horizontal loop antenna, well it's almost unbelievable. wires and pulleysand installed, raising the wire becomes a one-man In fact now that I am retired, when I build and install another flavor of the week(an addiction I think) the first test is against this loop. Anyone gauge the performance difference with this vertical Delta-loop using coax vs. ladder-line? 20m cw worked tonightI am currently Heinz I and II left the antenna analyzer to me and I was able to keep it quiet. Remember, this loop is above a Loop antennas may be constructed in many forms including horizontal full wave loops in square, rectangle or triangle (delta) shapes. The gain is around 4 dBd on 40 mtrs, but it will seem much higher due to the very low angle, radiation pattern. Should I re-do this cinched PEX connection? This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. Now we're in Folsom and get all kinds of strange weather! A Force 12 C-31XR for 10-20 meters sat at just under 100 feet atop a Rohn 45 guyed tower. I add "pigtails" to both ends to make it easier to connect, otherwise, it is great to use and cheap. For Amateur Radio News and Trends, please visit my news site at https://bigislandarrlnews.com.Aloha es 73 de Russ (KH6JRM). Easy Delta Loop for 50MHz Build your own delta loop antenna for 6 meters band The GM3VLB 5 Band mini delta beam The feed point insulator has a SO-239 connector. Feedback QST May 1996, p. 48. "pull" and a small pulley with 3/8-inch diameter rope for hoisting up the In the following, the construction of a simple multiband delta-loop antenna for the bands 80-10m is described. The characteristic impedance of a delta loop or quad-loop antenna is about 100 Ohm. 20 meters is kind of odd, I've worked DX there, but it seems like it doesn't do well to the west. pileups on the first or second call. i have a VERTICAL delta loop cut for 80 meters.Fed at the corner. As it turned out, I was not so far off with my guessed values. This is a little long for 80, 17 and 12 meters, but a little short for 40 and 30 meters and just right for 20, 15 and 10 meters. I also have a home grown horizontal Loop up. The opposite end of the feed point is approximately 35' AGL. This 1:2 BalUn scores very well both in terms of common mode current attenuation and impedance matching. Antenna covers all bands 80-10 meters + 30, 17, 12 meter WARC Bands This antenna works as a Full Wave Loop on 80 Meters and also works as a 2 wavelength open loop or Bi-Square on the 40 Meter band. Finally, I found the best description in the ARRL Handbook. My favorite vertical loop for portable and fixed use is described below. https://bigislandarrlnews.com. What is the symbol (which looks similar to an equals sign) called? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); 7,25 The Netherlands Full wave HF loop antennas are ideal NVIS (near vertical incident skywave) antennas for local, state, and regional communications. Well, the Shown below are some typical designs: This antenna is horizontally polarized and should be mounted as high as possible but works well at low heights of 10-30 feet. I have built both square and delta loops and have always fed them directly with 50 ohm coax through a 4:1 CURRENT balun. feedback is appreciated. While I could get it to load it naturally was only a half wave long on 160 and radiated as such. The two above pictures show the radiation pattern of the Delta Loop fed in the bottom corner of the antenna. The 80m delta loop is a field day team's secret weapon to run 80 and 40m frequencies. Read the coordinate image if I moved the mouse pointer over the respective segment. Moving to any angle is easy with EZNEC. Performance on other HF Amateur Radio bands is good enough to qualify as stand alone HF antenna if you can only erect one HF antenna. it has out-performed my OCF dipole, dipole and inverted L, when ALL bands from 10-160 are taken into account. few! We use cookies to ensure that our website runs as smoothly as possible. For 80 m, the shift of the resonance is still ok, but for the higher bands, the resonance frequency wandered outside of the amateur radio ranges. My question, essentially, is whether the feedline and balun choice can be optimized for not just one, but two bands 80m and 40m. On the internet I got some tips, partly with contradictory legends, which made me curious. Although Varney envisioned his design primarily as a 3/2 wavelength antenna for the 20 meter Amateur Radio band, radio amateurs have used the antenna for multiband use. I even broke several big An 80 Meter Horizontally Polarized Full Wave Loop Antenna Where I live, there are many trees that often get in the way of antennas and antenna towers. See the manual for more details. Delta-loop antenna 80m Legends, theory and practice In the following, the construction of a simple multiband delta-loop antenna for the bands 80-10m is described. On the other hand, the SWR, to my delight at 40m, improved to an acceptable 1: 1.7. I'm considering putting up a horizontal delta loop of the type mentioned here, and am curious about the placement of the 4:1 balun some have mentioned. Here are the results, 160 meters It will load using my manual tuner80 Meters 2:1 3681-3933 Khz40 Meters 2:1 7127-730020 Meters Requires tuner17 Meters 2:1 entire band15 Meters 2:1 21000-21.24512 Meters 2:1 entire band10 Meters 2:1 28.000-28.430, I can achieve an SWR below 2:1 anywhere on any of the above bands using my manual tuner. Vertical delta loops use the same 2:1 baluns as the horizontal loops or 4:1 for multi-band operation. It only takes a minute to sign up. On time Heinz, DL9NDG, appeared to me with the antenna analyzer minVNA, which he had borrowed shortly before from the other Heinz, DD9KA. Some people use open wire line and feed a 80 or 40 meter loop on multiple frequencies. Using a 160 meter full wave loop in that fashion is likely to be counterproductive. I then repeated the same measurement assuming an input impedance of 200 ohms, hoping that the upper band SWR values would improve, i.a. The part wire no. The Loop Skywire QST November 1985, pp. The chart below will give you the actual dimensions per band so you can see if you can fit this type of antenna at your location. Post #1542. Ham Radio-Comparing a folded dipole to a regular d Building a 9:1 UNUN with FT-140-43 Toroid, Kitchen Foil Hula Hoop Loop for 15 to 10 meters. It did however work as an awesome 160 receive antenna option. I found a 60 meter resonance for this 160 loop (third harmonic) and it did not work as well as a low dipole cut for 60 meters. Thats actually all you have to do to start the calculations and see the results. Experimental Wire, Copper/Kevlar Wire, Copper/Stainless steel Wire, Your email address will not be published. Hey Jerry - I'll bet you didn't see any winds like that back in Martinez, eh? economical and easy to build and install, works on all HF bands and The Delta loop antenna is not used as often compared to other antennas, yet these antennas have many advantages. "The Loop Skywire", Best feed point is 1/4 wavelength (246/f(mhz)) from the top point down one side. operation.On my tower I installed a six-foot long 4x4 painted wood 8,00 Belgium CW, SSB, FT8, etc.? Then the spruce side was raised again and a new measurement was made. Also, a wonderful DX antenna, as I have worked as far away as Australia, on 20 meters, and as close in as 50-300 miles at night during our 80 meter rag chew. Any and all I am using a home brew tuner, however old Johnson/Viking match Boxes are made of this type.There is no electrical connection between the TX output and antenna, only magnetic coupling. Now with a handy mounting plate to attach both ring cores, so gluing is no longer necessary. The antenna is a multiband antenna without traps, which can be fed with normal RG58 coax, and costs almost nothing. Very quiet receive antenna. loop!Gain, you ask?
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80 meter delta loop antenna