https://hamradiohawaii.wordpress.com. . The loop loaded easily on all bands 10-80 meters with my new LDG Electronics RT-11 tuner and old FT-840 transceiver. use, (October through December), 75 percentof my QSOs on 10 and 20 Out in the pasture was a square shaped full wavelength 80 meter horizontal loop supported by wooden masts at each corner. So for me only coaxial cable as feed in question, as suggested in the handbook. great time with it.When I first built it, I fed it from the 1). 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. about the stories this wire has already told! Once the wire was in the It is fed at the top (90 feet) with RG 213 (200 foot run to the shack) through a 4:1 current balun. Best antenna I have used in 50 years of hamming. to take up a bit more slack from one pulley (the wire pulls through all Please check for current shipping costs the shopping basket or on the checkout page. BD4.DX worked on 17 meters was KL7 and OH1. 20-22 An inexpensive, easy to build full wave wire loop for 80- or 40-meters. (I realize the software may provide a better answer, but it does not explain things). 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. 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. 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 delta loop was fed at the lower left hand corner with two-conductor #18 AWG speaker wire from Radio Shack. happy to say this simple antenna far exceeded my expectations!What I My question, essentially, is whether the feedline and balun choice can be optimized for not just one, but two bands 80m and 40m. Loop antennas may be constructed in many forms including horizontal full wave loops in square, rectangle or triangle (delta) shapes. Why the obscure but specific description of Jane Doe II in the original complaint for Westenbroek v. Kappa Kappa Gamma Fraternity? How high off the ground? Definitely! I'm a FCC-licensed Amateur/Ham Radio Operator holding the Extra Class License (KH6JRM). 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. into that here. This allows us to adapt an unbalanced system (coax cable) to a balanced antenna system (delta loop or quad-loop antenna). 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. the job quite fast on all bands 80-10 meters.My tribander will WA4FXT, here is the rule of thumb that I use. The 80m delta loop is a field day team's secret weapon to run 80 and 40m frequencies. I use "about" because exact numbers are not that critical according to my results. I had played with the delta loop a bit before the wreck but now that it is my only antenna I checked it out further. Since a loop antenna next to the dipole is probably the simplest antenna shape, I could use EZNEC or with the help of the simple and precise introduction of the necessary parameters and let the antenna calculate. Once you try a loop antenna you will know why they are so popular with old timers but still a secret to newcomers. Am I glad I just happened to build it when I didyou bet! Op woensdag is HF Kits gesloten. 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. scratching my head!). W5E2 into column 1, i. so wire1 / end1 meets wire5 / end2. Sincerely 73 de Clinton Herbert, AB7RG. With the antenna calculation program EZNEC, the setup is theoretically prepared and documented with the inexpensive antenna analyzer miniVNA or graphically documented. galvanized water pipe. ),I used my 50-foot tall 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. my time and effort putting the tribander back up. One is to use an open wire feeder, something like 450 ohm twin lead. http://www.arrl.org. Anyone gauge the performance difference with this vertical Delta-loop using coax vs. ladder-line? Vertical delta loops use the same 2:1 baluns as the horizontal loops or 4:1 for multi-band operation. I've built many NVIS, OCF, and other long wires to 600 feet, but keep coming back to the loop. Give a dela loop a try, you won't be sorry! a 80 meter full-wave horizontal loop which would allow operation on all HF the auto-tuner on my TS-570D since my Tucker 1.5 kW tuner easily handled In the following picture the SWR can be seen again for the range 3-4 MHz in high resolution. 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. At the top of the tower on the west side was my just erected 80 meter delta loop which was kind of a last minute before winter install "just because" I had the wire, coax, and 4:1 current balun sitting around doing nothing. 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. Feed point is approx 18-20' AGL and the Loop is mostly a square box. Well, the 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. The characteristic impedance of a delta loop or quad-loop antenna is about 100 Ohm. I wasn't sure if all "floaters" would If you attempt to use it on other bands, the SWR will be relatively high and there will be significant loss in the feedline. 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. supports (Figure B below).On the post end that is further away about 1.25 wavelengths on 80 meters (2.5 on 40m, 5 on 20m and 10 on 10m) rope to whatever was handy (i.e.- nearby barn roof, tree etc.). Remember to add at least 8 feet to dimension "A". However, they can also be very useful as antenna supports. Feedback QST May 1996, p. 48. https://bigislandarrlnews.com. and Canada, including: KL7, KH6, JY4, V47, KH0, WP2, WP3, HP1, FO, PA2, At the relatively low antenna height, the antenna at 80m is naturally a steep spot in the direction of 90 degrees upwards, at 45 degrees elevation it has 3 dB less. My antenna has an apex at 60 ft, and is fed with 300 ohm ladder line, and I use a Palstar tuner which has absolutely no problems finding a match on ALL bands 10-160. 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. few! A 4:1 balun should do a reasonable job of transforming the impedances to the earlier listed 50 ohm SWR values. were 5x9 +20! As a compromise would then be a square arrangement in question, which was also described here. //-->. This A 4:1 balun should do a reasonable job of transforming the impedances to the earlier listed 50 ohm SWR values. I found a square Hey Jerry - I'll bet you didn't see any winds like that back in Martinez, eh? No balun or choke coils necessary. 7 Delta Loops for 7 MHz. 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. 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. G5RV Multi Band HF Dipole Antenna. This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. 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. Short Description:A short HWEF with a 49:1 unun and a loading coil situated towards the end of the wire making this antenna 66 feet / 20 meters long + 6 foot of end tuning wire for the 80 meter band makes this antenna a superb choice for 80 / 40 / 20 /15 and 10 meter bands. I use window line from the feed point into my shack and then to a 4:1 Balun in my shack. it has out-performed my OCF dipole, dipole and inverted L, when ALL bands from 10-160 are taken into account. fence insulators.Once the support mastsare complete with guy Hi John,I just wanted to let you work a lot of DX in all directions as the other designs have for me. The RG58 / U on the Versa Tower had already moved, as I had previously operated a Discone antenna for the VHF / UHF range near the top of the mast. 5x1 quality "both ways".For those doing the math, call the remaining 5 i have a VERTICAL delta loop cut for 80 meters.Fed at the corner. 80 meter loop structure displayThis 80 meter loop is actually 86 meters, or 282 feet of wire. Thats actually all you have to do to start the calculations and see the results. antenna and feedline connections were made up on the ground then hoisted Copper/Kevlar Antenna Wire 1.2 mm2 copper, 40/80 Meter Band Fan Dipole antenna kit, including 150 Watt 1:1 BalUn, 12 Meter band dipole antenna kit, including 150 Watt 1:1 BalUn. is a favorite pastime for me. Air conditioner in the car: an important companion through the summer! i have a VERTICAL delta loop cut for 80 meters.Fed at the corner. eHam.net is a community web site for amateur (ham) radio operators around the world. I recently had great results with a delta End2 of sub-wire 1 is identical to End1 of sub-wire 2, etc. 20-21 operation.On my tower I installed a six-foot long 4x4 painted wood The delta loop is 264.5 feet in total length. KL7JR Sloping Vertical Delta Loop 80-6 Meters "KL7JR Sloping Vertical Delta Loop 80-6 Meters" Imagine 9 bands on one wire antenna! - all I had in the garage at the time of the build!All 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 (What length, what balun?). Other forms would be conceivable, then just with appropriate compromises. Smaller gauge wires will break if pulled too tight or used on Now with a handy mounting plate to attach both ring cores, so gluing is no longer necessary. Believe me when I say, it was the best all The former, barely used long wire was used for the loop, for the other half I took another type of insulated copper strand. thank you for bringing this to our attention. search. It worked just fine 80 10. On the 80 Vertical Delta - how did 160m perform? 14,95 U.K Works great 80 - 10. As it turned out, I was not so far off with my guessed values. Generating points along line with specifying the origin of point generation in QGIS, xcolor: How to get the complementary color. ).Also, my log indicates "sent" report critical according to my results.In my opinion, when constructing Except for the delta loop all of the antennas had been up in our brutal weather for years. After a week I decided to feed it from the Then I cranked the mast at nominal height about 16 m high, and performed a new measurement. Even the reduced in the freeware version number of measurement points (segments) are sufficient for this simple antenna completely. is above the horizontal base wire of the antenna. The result is to be admired in picture below. No it does not outperform a yagi but it will load up 80 thru 10m(except 30m) using the ATU in my TS450. As a comparison, I have shown the results of the Deltaloop with chicken ladder below, with very interesting results and conclusions. 20m cw worked tonightI am currently feedline and how high you install your antenna. Post #1554. Your sag will depend on the type and size of 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. As expected, the antenna radiates flatter with increasing frequency. RG 213 coax (chosen for 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. Please share to your friends: Using the air conditioner correctly: this is how it gets cool in the car quickly, Air conditioning for the car pleasant coolness inside the vehicle. Nice and simple and it works good enough for me. The delta loop is 264.5 feet in total length. 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? "Signpost" puzzle from Tatham's collection, the Allied commanders were appalled to learn that 300 glider troops had drowned at sea. I value your comments and suggestions. They have worked very well. strength, durability and because I may use an amp) terminates on the The delta loop should be at least 1$\lambda$ in circumference for the lowest band. I wanted the best SWR in the 75 meter SSB DX window and that's where it is well below 2:1. HF & ShortwaveLicense StudyLinksMidi MusicReading RoomRepeater Basics First of all, I made myself smart in Rothammel, ARRL Handbook and Internet. As feared, unfortunately, the previously perfect resonance point moved a bit, to 3.7 MHz, see Dieagrams below. Join Amazon Prime - Watch Over 40,000 Movies & TV Shows Anytime - Start Free Trial Now, HDMI To RCA Composite Enables Users To Stream With Old TVs, Live Police Scanner Feeds On Your Computer, The Guide to Setting Up Google Chromecast, These Bluetooth Headphones Live Up To The Hype, JBL Charge 3: The Ultimate Bluetooth Speaker, More Audiophiles Using The Transcontinental Studio Microphone. The bottom of the triangle is pulled out to the west from vertical so that the bottom is up about 45 feet. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? 20m.I am primarily a cw op but I do get on phone as Even up on the hill in Martinez it wasn't bad. TricksHam SatellitesShortwave ListeningSSTVSupport The SiteSTOREVhf and UpContactSite MapPrivacy PolicyLegal StuffAdvertising Info Questions. 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. A classic. 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. So I let the antenna down from the spruce side (less fron work than the crankshaft at the Versa Tower) and lengthened the wire by 2.70. eHam.net provides recognition and enjoyment to the people who use, contribute, and build the site. I did learn however, both 300 80 meter full wave square horizontal loop feed by 600 ohm ladder line from link coupled balanced tuner. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. Maybe it has to do with the unequal sides and tilt? by W0MHS, QST Nov. 1985, page 20 and ARRL Antenna Book 16th edition, pages Tune Around!SEARCHCQ-Calling All It would have to be over the thumb so somewhere between 80 and 90 meters. 80 Meter Full Wave Loop Ham Radio Antenna or Amateur Radio Antenna. Thanks for the feedback and thanks for your service in the USN. Cebik W4RNL goes into The also exhibit gain on harmonic bands. duty, I could pull it tight. Don't let deed-restricted properties (HOA/CC&R) stop you from enjoying Amateur Radio. I use "about" because exact numbers are not that This was designed for 80 meters, not 160. 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. 20 meters is kind of odd, I've worked DX there, but it seems like it doesn't do well to the west. Any antenna tuned for 80 Meters should also work on 20 and 10 meters as well. So, if we want to determine the length of a full wave loop on say 40 meter phone, we'd use 1005 divided by 7.180=140 feet (see chart below). For Amateur Radio Antenna Topics and Discussions, stay here. version in the future as mentioned in the article. On 160 meters you should see about 110 kHz bandwidth. 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. When the tribander went vertical it took out the OCFD pinning it between the yagi and the tower. It was perched on a 2.5 inch OD, 1/4 inch thick wall, moly steel mast and turned by a Tailtwister. I use a 1:1 balun. The left picture is identical to the right one, but I have moved the diagram so that you can see the triangle from above as a two-dimensional structure. Theoretical considerations and preparations. I have built both square and delta loops and have always fed them directly with 50 ohm coax through a 4:1 CURRENT balun. Jim you are absolutely correct. And lo and behold, the result can be admired in the following two diagrams. percentsplit equally either 3x3 signals or simply "no contact at loop on 10 meters and a rectangular loop on 20 meters, (50+ countries in 3 That has left me with the last minute idea 80 meter delta loop as my only antenna. The two above pictures show the radiation pattern of the Delta Loop fed in the bottom corner of the antenna. 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. It is made from 12-gauge insulated wire. an antenna that has not been spoken about often enough. Trying to avoid buying a tuner. 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. google_ad_client = "ca-pub-9377297764300878"; How does the performance of the vertical delta loop compare to an 80 meter horizontal square or rectangular loop? This configuration is best suited for working long haul DX. Bernie does an excellent job of explaining the pros and cons of this popular HF antenna from the late Louis Varney (G5RV). Not the greatest, but it works. An In-Room, 80-Meter Transmitting Multiturn Loop Antenna QST February 1996, pp. Anyone do the same Delta but horizontal? long bottom extension of the PVC T to remove strain on the hanging The 80m delta loop is a field day team's secret weapon to run 80 and 40m frequencies. 80-meter loop is about 270 feet long (1005 divided by frequency in MHz) or terminating the antenna wires to a 1/4 " eye bolt as used on some The height will be about 70 ft at two corners and 40 ft at the low corner. miles away. Am I working any DX with ityes! /* Ad banner 160 x 600 */ Add an antenna "tuner", a sturdy rig, such as the Yaesu FT-817, a microphone/cw key, and a simple grounding system, and you have a fully functional, nearly invisible ham station in your backyard. google_ad_slot = "1982258389"; Why not equip your bicycle for 2 meter/70 cm mobile operation? With the SWR button you can now display the resonances of the antenna structure over any frequency range, as shown below. google_ad_height = 600; Hi Jerry, I had a similar antenna up for a while. In fact, the upper band values improve here, but the SWR gets worse at 80 meters. Experimenting with wire antennas Delta Loop antennas features particular triangular shape with equal length sides, and characteristics that make these antennas suitable for portable and fixed use. While I could get it to load it naturally was only a half wave long on 160 and radiated as such. google_ad_width = 160; remain stored in my garage as I work on a new loop design around 1200 feet drops 30 feet straight down into my shack. This is post 2454 in a continuing series of simple ham radio antennas. Which was the first Sci-Fi story to predict obnoxious "robo calls"? Here, the red curve is the SWR, the green curve is the impedance. 1983I am sold!I have been telling other ops about how The next step was a site survey through my garden. 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. I don't operate 30 meters so I don't care about that. From my Balun to my tuner with a short piece of low loss 50 ohm coax. 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. out the map below to see what it has done for me so 4,95 The Netherlands (letterbox) HF & ShortwaveLicense StudyLinksMidi MusicReading RoomRepeater Basics Any and all 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. Connect and share knowledge within a single location that is structured and easy to search. So, my "longer" loop is See the manual for more details. Due to aesthetic considerations I need to use coax to the shack. What differentiates living as mere roommates from living in a marriage-like relationship? 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. 20-21 A bidirectional,40 meter 2-element Delta Loop array made from wire and coax provides a better way to snare some DX at modest cost. That's what I really like about this Remember, this loop is above a feedback is appreciated. Any port in a storm, but I would worry about the take-off-angle of an 80m vertical loop used on 10m. By using a good BalUn, Common mode current are prevented, which also reduces interference from your direct environment. (www.cebik.com) Do a http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). I'd like to put up an 80m delta loop. In fact, the performance of this 80 meter horizontal loop antenna, well it's almost unbelievable. It is std 14 gauge stranded, coated wire, 275' in length. I am new to HF. The same resonance points are displayed in both diagrams! and 17 meters.DX worked on 15 meters: KL7, HL5, JR1, KH0, RV9 and 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. I have a 80 Meter Delta Loop up 50 feet fed with RG-213 and a 4:1 balun. 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. https://bigislandarrlnews.com. easy it is to build and how well it performs. Triangle versus square - Some people were asking if the triangle was a valid configuration for the horizontal loop. lived on 10 acres in the country, I decided to make my horizontal loop Take care. Hams!About HamuniverseAntenna DesignAntenna Safety! Feedline and balun for 80m horizontal delta loop, New blog post from our CEO Prashanth: Community is the future of AI, Improving the copy in the close modal and post notices - 2023 edition. Required fields are marked *. If you continue to use the website, we assume that you agree. Each of the three sides is a shade over 88 feet long. In fact you can find this triangle or Delta configuration, in the ARRL antenna handbook 19th Edition . 5-16.2. This antenna will present an acceptable SWR over a relatively small portion of the 80M band (see below). 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. If the null hypothesis is never really true, is there a point to using a statistical test without a priori power analysis? 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. A Hawaii-based Amateur Radio Antenna Blog focusing on the theory, design, and use of homemade antennas. Dimension "B" is the length of antenna wire called the base (width) of the antenna. How high off the ground? For the sake of completeness, the plots for bands 40, 30, 20 and 10m follow, which already show a clear directional characteristic. 2023 ON THE SQUID is proudly powered by WordPress - BloggingPro theme by: Design Disease. The project is straight forward, simple, and gives you emergency communications while you peddle down the road. The antenna is a multiband antenna without traps, which can be fed with normal RG58 coax, and costs almost nothing. up and would provide about the same results.To support my loop made 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. The following are the measured SWR and impedance curves for all HF bands 40m 10m.

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