80 meter delta loop antenna

The antenna is completely symmetrical, in short there is no earth or counter capacity required. 5-14. Nice and simple and it works good enough for me. The loop is clearly the option for quiet antenna and a good option for multiband use but otherwise non spectacilar. I got the idea from the W1FB Antenna Notebook. google_ad_height = 600; about 1.25 wavelengths on 80 meters (2.5 on 40m, 5 on 20m and 10 on 10m) The Delta Loop is not only a great transmitting antenna but a low noise receiving antenna. with the other three supports. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). Dimension "B" is the length of antenna wire called the base (width) of the antenna. and is installed between 30 to 40 feet in the air.Scaled-down Length of a full-wave cwJM7 20m cwA92 20m SSB5T0 Clarification: Thiis was a better all band antenna than the 160 L or the 240 ft dipole. I fed it with 300ohm TV twin lead at one of the bottom corners. cw4X4 20m cwTF3 20m cwKH2 20m 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. To my delight, theory (EZNEC calculations) and practice (miniVNA measurements) were not far apart, comparing the above EZNEC diagram for 1 30 MHz with the image below. The transceiver has an impedance of 50 Ohm, so an impedance transformation must also be made. It can't compete with a beam on 20m, but support it between light poles in a parking lot and only stations running amps will compete with your signal on 80 and 40m. On 160 meters you should see about 110 kHz bandwidth. . Never will Go back to a dipole or G5RV again. Often times on 80m Could you or anyone add some information on the choice of balun? http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). Works great 80 - 10. economical and easy to build and install, works on all HF bands and Out in the pasture was a square shaped full wavelength 80 meter horizontal loop supported by wooden masts at each corner. The antenna is tied at three locations and insulators are supplied and factory set at the proper location so all you have to do is tie some rope to them and hoist the antenna into place. strength, durability and because I may use an amp) terminates on the Give a dela loop a try, you won't be sorry! 1983I am sold!I have been telling other ops about how 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. Learn more about Stack Overflow the company, and our products. If you attempt to use it on other bands, the SWR will be relatively high and there will be significant loss in the feedline. 5-16.2. BD4.DX worked on 17 meters was KL7 and OH1. The 600 Watt 1:2 BalUn is made up of two FT240-43 ferrite ring cores. The center feed optimizes the results compared to a corner feed. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=2zWb-KnkGdY. Click here for a detailed building description. scratching my head!). It was slightly angled at maybe 25 degrees since the tower was only 60 ft tall. Amateur Radio Bicycle Mobile Setup. For the latest Amateur/Ham Radio news and information, please visit these web sites: http://www.HawaiiARRL.info. ),I used my 50-foot tall Finally, I found the best description in the ARRL Handbook. Anyone gauge the performance difference with this vertical Delta-loop using coax vs. ladder-line? Note: Dimension "A" is not the length of the wires on, the sides of the Delta Loop but only the height the apex. Am I glad I just happened to build it when I didyou bet! 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. and adding my own twist, the antenna would either work or be a A little wood, some wire and a handful of components can make a directional antenna for indoor use where outdoor antennas are not permitted. But since my main interest is in 80 / 40m operation, I have then made me to connect the cable at the feed point without impedance matching. Tune Around!SEARCHCQ-Calling All https://bigislandarrlnews.com. Am I working any DX with ityes! requires no special feed networks, only a transmatch, coax and some Here, the red curve is the SWR, the green curve is the impedance. Likewise, the advantages of a coaxial cable compared to a chicken ladder with Matchbox for this type of antenna are practically and metrologically documented. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. Bring down a length of 450 ohm line, then a balun, then coax? The tower and tribander had been up for almost 10 years and had weathered previous high winds, ice storms, ice loading, etc. 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? 4,95 The Netherlands (letterbox) If you continue to use the website, we assume that you agree. 14,95 U.K Now with a handy mounting plate to attach both ring cores, so gluing is no longer necessary. Vertical delta loops use the same 2:1 baluns as the horizontal loops or 4:1 for multi-band operation. The same resonance points are displayed in both diagrams! Since the property boundaries are covered by tall trees, a square loop, as described in the handbook, was out of the question for me, but only a triangular arrangement. Use a TV coax and balun for a poor-man's OCFD? I quickly found a suitable BNC adapter on PL, and off we went. Joseph. it has out-performed my OCF dipole, dipole and inverted L, when ALL bands from 10-160 are taken into account. The 1:2 BalUn is built around two FT240-43 ferrite toroidal cores. google_ad_client = "ca-pub-9377297764300878"; This allows us to adapt an unbalanced system (coax cable) to a balanced antenna system (delta loop or quad-loop antenna). For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. work a lot of DX in all directions as the other designs have for me. It may even have loaded on 160 meters but I forgot to try. space! N6JSX: A regular, traditional 160 ant such as an inverted-L smokes this ant on 160.as it should. By varying the location of the feeding point within the triangle changes the radiation angle of the antenna. The diagram nicely shows the resonances at 3.6 MHz and their multiples. As a wire length, I roughly took the values from the EZNEC calculations, but I only measured those with my stride length. It is fed at the top (90 feet) with RG 213 (200 foot run to the shack) through a 4:1 current balun. @enzo I see now that I misinterpreted your layout for the antenna. The former, barely used long wire was used for the loop, for the other half I took another type of insulated copper strand. I had to realize that after 19.00h also on 20m quite quiet prevailed. operation.On my tower I installed a six-foot long 4x4 painted wood "The Droopy Loop" by KJ7MZ, QST July 1996, page I recently had great results with a delta I then repeated the same measurement assuming an input impedance of 200 ohms, hoping that the upper band SWR values would improve, i.a. I did learn however, both 300 Here's a way to use Amatuer/Ham Radio while you work on shedding a few pounds in useful exercise. wires and pulleysand installed, raising the wire becomes a one-man Very quiet receive antenna. Product Code:EFHW 49:1unun 80 / 40 / 20 15/ 10 m 200W Short with coil. The delta loop is 264.5 feet in total length. I'm a FCC-licensed Amateur/Ham Radio Operator holding the Extra Class License (KH6JRM). Do the Horizontal Conductors of a Ground Plane Antenna Adequately Decouple Its Feedline? The performance by CW/digital band segment of this antenna is: These results were obtained over real, average ground. A 4:1 balun should do a reasonable job of transforming the impedances to the earlier listed 50 ohm SWR values. Any and all Using a 160 meter full wave loop in that fashion is likely to be counterproductive. on signals mentioned above over the two-day period of tests.I am (www.cebik.com) Do a well.I built the antenna out of solid 14 gauge copper wire Even up on the hill in Martinez it wasn't bad. Loop Antennas and Calculator. search. Due to the possible suspension points, a triangle of about 20x30x30m would be suitable, fed by a coaxial cable in one corner of the triangle, i. at the suspension point Versa Tower. a lot of detail on gain (see ref #4 below) in his article so I won't get all" (you can't work them all! https://www.youtube.com/watch?v=TqE_W_0Le0k&ab_channel=RichRodgers. I also have a home grown horizontal Loop up. It was an 80 meter delta loop, apex up, with the top attached to the top of a 60 foot tower. Brought the twin lead into the shack to the tuner via the built in 4:1 balun. 20m.I am primarily a cw op but I do get on phone as 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. That was then 86 m. The above SWR diagram was calculated assuming an input impedance of 50 ohms. ), then I decided to take the plunge and put up drops 30 feet straight down into my shack. For Amateur Radio Antenna Topics and Discussions, stay here. in QST over the years on loop antennas. Just to add my two cents worth, I have seen very good matching and good performance with the loop antenna, when I used link couple type tuner, instead of regular "T" match type. 1: 1 balun, wire strand, insulators for the bracing and rope clamps I had too. I'm amazed at how a "shorted-out antenna" can even work at all more or less so well! air and about a foot or two away from the masts, I merely tied off the How to force Unity Editor/TestRunner to run at full speed when in background? In this video I will show you the 100 Watt Alpha Loop from Alpha Antenna. (What length, what balun?). How high off the ground? The gain is around 4 dBd on 40 mtrs, but it will seem much higher due to the very low angle, radiation pattern. So, my "longer" loop is Here is a sample of stuff worked with the K3 and 75w:PY2 15m cwOH3 40m cw4K9 20m cwRA4 20m cwZP6 20m cw9K2 20m cwE7 15m cwKH6 20m RTTYVK2 30m This is probably the best 80 - 10 meter antenna I have ever used. Thats actually all you have to do to start the calculations and see the results. Using the general formula 1005/f (MHz)=L (ft) and a design frequency of 7.088 MHz, I cut three equal pieces of wire measuring 47.26 feet (47 feet, 3.12 inches)/14.40 meters. SWR and impedances in the frequency range 1 31 MHz. Moving to any angle is easy with EZNEC. I've worked Europe and Australia on 30 with it, South America and the Canary Islands on 40, and I've worked a lot of DX on 17-10 with it too. Repeater Anyone do the same Delta but horizontal? RG 213 coax (chosen for They can also be in the vertical plane and are most often in the same shapes with the delta being very popular as it has both vertical and horizontal polarization. Loop Antenna Notes.updated Dec. 2012 . So I split the thing into 5 parts, although of course it consists of a single wire. 20-21 To build the largest and most complete Amateur Radio community site on the Internet - a "portal" that hams think of as the first place to go for information, to exchange ideas, and be part of whats happening with ham radio on the Internet. Believe me when I say, it was the best all http://www.arrl.org. Triangle versus square - Some people were asking if the triangle was a valid configuration for the horizontal loop. worked on 15 and 17 meters.Both bands produced about the same results Your email address will not be published. (Note: #1 is available to A 4:1 balun should do a reasonable job of transforming the impedances to the earlier listed 50 ohm SWR values. from salvaged telegraph line wire from the Yukon Territory (just think I wish I had tried this antenna sooner in my ham hobby years. Generating points along line with specifying the origin of point generation in QGIS, xcolor: How to get the complementary color. I don't operate 30 meters so I don't care about that. The transceiver is an Icom 7300 which tunes SWR 3:1 or less. antennas". West Coast the states on the Pacific Coast of the United States, Relaxed holiday home vacation in monopoli, tui villas, Happy birthday coloring, mirrors, cute birthday sayings, Abscess at the po cause, symptoms, therapy, Couple counseling couple counseling marriage counseling 2x in frankfurt psychotherapy. also "the longer the wire the better" may also fit some loops.Since I 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. With the antenna calculation program EZNEC, the setup is theoretically prepared and documented with the inexpensive antenna analyzer miniVNA or graphically documented. A Hawaii-based Amateur Radio Antenna Blog focusing on the theory, design, and use of homemade antennas. WOW! So much so, Experience report of a hearing aid beginner Motivation for this review Based on my own experience as a fresh or inexperienced hearing aid wearer, I would. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=aeNHIQ_j4Dk This well-produced and richly illustrated tutorial on the classic G5RV HF Dipole Antenna was presented to the Brandon Amateur Radio Society in Brandon, Florida in 2017 by Bernie Huth (W4BGH). listening to A92HK on the loop. As a compromise would then be a square arrangement in question, which was also described here. 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. End2 of sub-wire 1 is identical to End1 of sub-wire 2, etc. If you have sufficient space and a few trees, then this 80 meter full wavelength loop antenna is for you. Loop antennas may be constructed in many forms including horizontal full wave loops in square, rectangle or triangle (delta) shapes. 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 80m 2 element Yagi antenna 2 elements short boom yagi for 80 meters Receiving antenna for low bands K9AY loop antenna installed at PA6Z Contest group. TrackBack URI. Once I re-build the horizontal loop I do intend to do some comparisons. The feed impedance of a Delta Loop is around 100 ohms so you will have to use a quarter wave length of 75-ohm coax to feed this antenna which is user supplied. The Delta loop antenna is not used as often compared to other antennas, yet these antennas have many advantages. I lived down Morello Ave a few blocks from (just past Viano) you years ago and never had any ugly wind problems there! A strong step with my short legs = 1 m. Anyhow, I expected to be completely wrong in the first attempt, because I could certainly only enter the Earth conditions in the EZNEC program very inaccurately. so will take Stev''s word that it loads on that band as well. By "tuned for 3.55MHz" I meant trimmed. As feared, unfortunately, the previously perfect resonance point moved a bit, to 3.7 MHz, see Dieagrams below. Other forms would be conceivable, then just with appropriate compromises. Should I re-do this cinched PEX connection? The project is straight forward, simple, and gives you emergency communications while you peddle down the road. TricksHam SatellitesShortwave ListeningSSTVSupport The SiteSTOREVhf and UpContactSite MapPrivacy PolicyLegal StuffAdvertising Info Conditions have been average lately so it has to get better as the propagation improves. Then the spruce side was raised again and a new measurement was made. Antenna for Condo Backyard-Stealth. Height above ground range. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Since winter is upon us with a fury there is no way to repair any of the mess until Spring. percentof them being with stations outside North America *(about 10% Before I started cranking up the mast, which after all demands a pretty athletic performance from me old boys, I already wanted to do the first measurement. a 80 meter full-wave horizontal loop which would allow operation on all HF I wasn't using an ampeither. 80 meters, SWR 1.7:1, 6.7 dBi gain at 87, 0 dBi gain at 22, 40 meters, SWR 1.7:1, 7.1 dBi gain at 32, 0 dBi gain at 9, 20 meters, SWR 1.6:1, 9.6 dBi gain at 16, 0 dBi gain at 4. diagram. thank you for bringing this to our attention. 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. If you have sufficient space and a few trees, then this 80 meter full wavelength loop antenna is for you. 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 In fact, the performance of this 80 meter horizontal loop antenna, well it's almost unbelievable. Of all the antennas I've built and tested this one works the best. You can get multiband performance by using a wide-range antenna "tuner", a 4:1 balun, and parallel feed line, such as 450 ohm window line. Read the coordinate image if I moved the mouse pointer over the respective segment. tower and three masts, each 35 to 40 feet long, made from 2 inch I've been running an open loop for the last couple of years and having good results. Not the greatest, but it works. commercially made baluns. 73, Paul KB4GYT in South Carolina. I use a 1:1 balun. Any antenna tuned for 80 Meters should also work on 20 and 10 meters as well. post hanging off near the top of tower for one of the four required Contact the site with comments or questions. 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. Length of a full-wave 80-meter loop is about 270 feet long (1005 divided by frequency in MHz) or about 67 feet per side. By using a good BalUn, Common mode current are prevented, which also reduces interference from your direct environment. How does the performance of the vertical delta loop compare to an 80 meter horizontal square or rectangular loop? (Ref. A Practical Antenna for 160 Metres. https://amateurradionewsinformation.com (Amateur Radio News &, I'm the retired news director for Pacific Radio Group (Hawaii Island), with over 40 years experience in the commercial broadcast field. antennas, not only is the old saying "the higher the better" true, but 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. 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). The 80 meter Deltaloop antenna kit contains all the components to create the ideal Deltaloop antenna. Thank you for visiting my Amateur Radio Blog. It outperforms dipoles and OCF antennas. W5E2 into column 1, i. so wire1 / end1 meets wire5 / end2. feet of wire and a tuner. AND IT IS WORKING DX JUST FINE. Branches are one of the main problems to be dealt with. Due to the metal Versa-Towers house wall-carrying a chicken ladder would be difficult to realize, and a thick Matchbox I have not. It did however work as an awesome 160 receive antenna option. A "One-Masted Sloop" for 40 . Remember, this loop is above a What is the symbol (which looks similar to an equals sign) called? For Amateur Radio News and Trends, please visit my news site at https://bigislandarrlnews.com.Aloha es 73 de Russ (KH6JRM).