Antenna for Condo Backyard-Stealth. Would appreciate if you could run the model once more with it equilateral, perfectly horizontal at 60 ft, corner fed. The delta loop is 264.5 feet in total length. Other combinations of ladder lines and baluns are possible but with no practical advantage. and adding my own twist, the antenna would either work or be a Spot on frequency cut for 80 meters with about 30 kcs either side. Until Monday, 12/17/12,when a 102 MPH windstorm hit my QTH I had four HF antennas at my QTH in Eastern Oregon. remain stored in my garage as I work on a new loop design around 1200 feet Technical assistance provided by Zach. Ask ElmerAbout BatteriesCode PracticeComputer HelpElectronicsFCC In the following, the construction of a simple multiband delta-loop antenna for the bands 80-10m is described. thank you for bringing this to our attention. On 80 meters it equals or better every other antenna mentioned. If you have sufficient space and a few trees, then this 80 meter full wavelength loop antenna is for you. 20m cw worked tonightI am currently 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. watt manual tuners (MFJ and Vectronics) that I used took some time to tune //-->. (What length, what balun?). 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. Not the best antenna, but it works. The feed point insulator has a SO-239 connector. The antenna is symmetrical and closed so that in many cases the reception will be quieter compared to asymmetrical or open antennas. Never will Go back to a dipole or G5RV again. the job quite fast on all bands 80-10 meters.My tribander will summary.." I LOVED MY LOOP"73, John 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. The 80m delta loop is a field day team's secret weapon to run 80 and 40m frequencies. Works great 80 - 10. The characteristic impedance of a delta loop or quad-loop antenna is about 100 Ohm. The best answers are voted up and rise to the top, Not the answer you're looking for? I only had to add 1m to Y, and I was at the desired resonant frequency according to the SWR diagram. loop seemed to work just fine equally in all directions (I'm still KL7JR Sloping Vertical Delta Loop 80-6 Meters "KL7JR Sloping Vertical Delta Loop 80-6 Meters" Imagine 9 bands on one wire antenna! I got the idea from the W1FB Antenna Notebook. Of all the antennas I've built and tested this one works the best. the loop as compared to the Carolina Windom. Since my wire was very heavy 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. This allows us to adapt an unbalanced system (coax cable) to a balanced antenna system (delta loop or quad-loop antenna). The 600 Watt 1:2 BalUn is made up of two FT240-43 ferrite ring cores. Joseph. At the spruce, I pulled the wire to target height. You will also need a feed line choke or better yet, just get the Hybrid 4:1+1:1 in a single box. If tuned for 3.55MHz, I anticipate having a good SWR on 80m, 40m, and 20m. The LGD 100 does not chew long on 160 meters and as I drop bands, the chewing drops like a rock. 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. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). 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. The main reason for using a BalUn is to make sure that the coax cable is not part of the antenna system and that it will radiate undesirable. feedline and how high you install your antenna. Don't let deed-restricted properties (HOA/CC&R) stop you from enjoying Amateur Radio. long spans - just ask me!My loop is fed about mid-span and the coax The direction of fire is broadside to the antenna. Vertical delta loops can be oriented several way but the most popular is to have the pointy end at the top (usually a single support) and the lower horizontal ends just out of reach of humans and animals. 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? Experimenting with wire antennas L.B. Here, the red curve is the SWR, the green curve is the impedance. 73. This Hi Jerry, I had a similar antenna up for a while. Many BalUn manufacturers only look at the impedance matching but forget to look at the common mode current attenuation. X axis) is about 3 dB. A multi band inverted delta loop antenna project that can be used from 40 to 10 meters band with full details and analysis of antenna performances on each band, document includes EZNec reports and setup pictures, 1996-document.write(new Date().getFullYear()) The DXZone.com - Terms of Use, Copyright & Privacy Policy, [ Hits: 1002 | Votes: 4 | Rating: 7.25 ], [ Hits: 2760 | Votes: 6 | Rating: 3.17 ], [ Hits: 4915 | Votes: 18 | Rating: 7.11 ], [ Hits: 2763 | Votes: 7 | Rating: 4.86 ], [ Hits: 65323 | Votes: 68 | Rating: 6.66 ], [ Hits: 9614 | Votes: 18 | Rating: 3.83 ], [ Hits: 32807 | Votes: 35 | Rating: 6.16 ], [ Hits: 15602 | Votes: 47 | Rating: 7.43 ], [ Hits: 3874 | Votes: 6 | Rating: 5.33 ], [ Hits: 2038 | Votes: 4 | Rating: 3.75 ], [ Hits: 25985 | Votes: 5 | Rating: 3.6 ], [ Hits: 6903 | Votes: 3 | Rating: 8.33 ], [ Hits: 20377 | Votes: 15 | Rating: 3.28 ], [ Hits: 1441 | Votes: 6 | Rating: 3.17 ], [ Hits: 4278 | Votes: 3 | Rating: 3.33 ], [ Hits: 7666 | Votes: 6 | Rating: 7.67 ], [ Hits: 1763 | Votes: 4 | Rating: 3.25 ], [ Hits: 12797 | Votes: 18 | Rating: 6.34 ], [ Hits: 1471 | Votes: 4 | Rating: 5.75 ], [ Hits: 2310 | Votes: 16 | Rating: 6.13 ], [ Hits: 7020 | Votes: 13 | Rating: 7.54 ], [ Hits: 7118 | Votes: 7 | Rating: 7.28 ], [ Hits: 6697 | Votes: 8 | Rating: 4.62 ], [ Hits: 81072 | Votes: 41 | Rating: 4.88 ], [ Hits: 1779 | Votes: 11 | Rating: 8.55 ], [ Hits: 3690 | Votes: 13 | Rating: 5.92 ], [ Hits: 2059 | Votes: 19 | Rating: 6.12 ], [ Hits: 3928 | Votes: 9 | Rating: 6.55 ], [ Hits: 9963 | Votes: 4 | Rating: 6.75 ], [ Hits: 11083 | Votes: 10 | Rating: 6.5 ], [ Hits: 12961 | Votes: 8 | Rating: 7.5 ]. First of all, I made myself smart in Rothammel, ARRL Handbook and Internet. 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. This was designed for 80 meters, not 160. The delta loop is 264.5 feet in total length. Product Code:EFHW 49:1unun 80 / 40 / 20 15/ 10 m 200W Short with coil. google_ad_width = 160; fromPaul -KB4GYT He also rips off an arm to use as a sword. It would have to be over the thumb so somewhere between 80 and 90 meters. Do you already have specific dimensions in mind? with the other three supports. a lot of detail on gain (see ref #4 below) in his article so I won't get It is a very easy task to attach this wire to the center insulator. For example why not feed with 450ohm line, then a 9:1 balun into coax? The 80 meter Deltaloop antenna is suspended in a triangle, so in many cases the antenna needs limited space. Thanks. thank you for bringing this to our attention. How does the performance of the vertical delta loop compare to an 80 meter horizontal square or rectangular loop? about the stories this wire has already told! It loads on 80-10 meters, but I haven't tried making any QSOs on 80 with it. Loop Antenna Notes.updated Dec. 2012 . Dimension "B" is the length of antenna wire called the base (width) of the antenna. 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. 40 Meters with a Phased Delta Loop QST May 1984, pp. this antenna. and is installed between 30 to 40 feet in the air.Scaled-down Cubical quads. Rich Rodgers (WB5YBZ) does a wonderful job of describing this antenna he built for his home station. About 75 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. 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). Loops are quiet antennas compared to verticals and dipoles and are omni-directional. fence insulators.Once the support mastsare complete with guy The Delta Loop (Skywire) Antenna Legends, Theory and Reality Karl, DK5EC, the construction of a simple multiband delta loop antenna (skywire) for the 80m, From the creative laboratory: jean dubuffet in the fondation beyeler kinderamtellerrand, Last updated 3 June 2017 at 0:21 Great moment in Basel: The Fondation Beyeler is showing a Jean Dubuffet retrospective. We ship worldwide. 8R1, DS3, G3, LU1, ON7, JA (all), DU1, I2, ES1, UA9 and UA6 to name a 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. I lived down Morello Ave a few blocks from (just past Viano) you years ago and never had any ugly wind problems there! That's what I really like about this For example, the antenna is symmetrical and closed, so that the reception will in many cases be quieter compared to asymmetric or open antennas. 14,95 U.K After we had the Delta loop of our OV home G25 back in the gears (see action Nobel laureates ) and I was very pleased with the send / receive properties, I wanted to build this type of antenna at home. This antenna is resonant at 3.650 MHz-~-~~-~~~-~~-~-Please watch: "Minelab Manticore fir. 8,00 Belgium So for me only coaxial cable as feed in question, as suggested in the handbook. I had to agree fully later. By using a good BalUn, Common mode current are prevented, which also reduces interference from your direct environment. In the column Conn, the connection points automatically enter, e.g. If the null hypothesis is never really true, is there a point to using a statistical test without a priori power analysis? 20-21 eHam.net provides recognition and enjoyment to the people who use, contribute, and build the site. I quickly found a suitable BNC adapter on PL, and off we went. critical according to my results.In my opinion, when constructing 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 Loop antennas may be constructed in many forms including horizontal full wave loops in square, rectangle or triangle (delta) shapes. No it does not outperform a yagi but it will load up 80 thru 10m(except 30m) using the ATU in my TS450. In the Handbook, the antenna is referred to as a Loop Skywire, and presented by the radio operator community as a completely undervalued secret tip in terms of cost / benefit ratio. Noise Suppression up to 38 dB, Receiver Impedance/Isolation Transformers, Broad Band Terminated Dipoles (BBTD, T2FD). I then repeated the same measurement assuming an input impedance of 200 ohms, hoping that the upper band SWR values would improve, i.a. Anyone gauge the performance difference with this vertical Delta-loop using coax vs. ladder-line? is above the horizontal base wire of the antenna. I know it tunes 40 and 80 meters quite fast! But not 102 MPH, for sure!!! 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. Rich Rodgers (WB5YBZ) does a wonderful job of describing this antenna he built for his home station. use, (October through December), 75 percentof my QSOs on 10 and 20 The 3 suspension points were already there: the Versa Tower, the TV antenna mast on the roof, and the spruce. I will redo the analysis and update the answer this weekend. The bottom of the triangle is pulled out to the west from vertical so that the bottom is up about 45 feet. The G5RV is an excellent choice for the 20 meter band. It may even have loaded on 160 meters but I forgot to try. Bring down a length of 450 ohm line, then a balun, then coax? i have a VERTICAL delta loop cut for 80 meters.Fed at the corner. 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. google_ad_height = 600; it has out-performed my OCF dipole, dipole and inverted L, when ALL bands from 10-160 are taken into account. Amateur Radio Stack Exchange is a question and answer site for amateur radio enthusiasts. about 67 feet per side. It outperforms dipoles and OCF antennas. Also, the higher resolution at 3.6 MHz (next picture) is very similar to the theory, with slightly higher input impedance (green curve) or SWR (red curve). It did however work as an awesome 160 receive antenna option. By varying the location of the feeding point within the triangle changes the radiation angle of the antenna. 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. google_ad_slot = "1982258389"; to take up a bit more slack from one pulley (the wire pulls through all With the SWR button you can now display the resonances of the antenna structure over any frequency range, as shown below. Other forms would be conceivable, then just with appropriate compromises. WA4FXT, here is the rule of thumb that I use. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Dimension "B" is the length of antenna wire called the base (width) of the antenna. my portable outings! What are some drawbacks to delta loop antennas? Easy Delta Loop for 50MHz Build your own delta loop antenna for 6 meters band The GM3VLB 5 Band mini delta beam On 80 meters it equals or better every other antenna mentioned. AND IT IS WORKING DX JUST FINE. Why not equip your bicycle for 2 meter/70 cm mobile operation? 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. This added height will be how high the base of the antenna will be above ground. That has left me with the last minute idea 80 meter delta loop as my only antenna. "Signpost" puzzle from Tatham's collection, the Allied commanders were appalled to learn that 300 glider troops had drowned at sea. . For Amateur Radio Antenna Topics and Discussions, stay here. 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. As a compromise would then be a square arrangement in question, which was also described here. Nice and simple and it works good enough for me. AND IT IS WORKING DX JUST FINE. an antenna that has not been spoken about often enough. All stainless steel, 600 Watt, with proper strain relief. We use cookies to ensure that our website runs as smoothly as possible. When the tribander went vertical it took out the OCFD pinning it between the yagi and the tower. Although you can erect this loop by yourself, you may want some help to speed up the construction and rigging of this large HF antenna. After a week I decided to feed it from the Please submit any Amateur Radio related news or stories that you would like to see, here on eHam.net. It is made from 12-gauge insulated wire. The also exhibit gain on harmonic bands. Although I have mostly tried this antenna on Op woensdag is HF Kits gesloten. galvanized water pipe. On the other hand, the SWR, to my delight at 40m, improved to an acceptable 1: 1.7. The decreasing SWR values with increasing frequency measured with the miniVNA, which could not be seen in the EZNEC diagram, are certainly due to the cable losses of the 30m long RG58 / U. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). It is resonant at the fundamental frequency 3.5 MHz and at any multiple, including 40, 30, 20, 15 and 10 m. The Handbook goes on to say that an ideal radiation pattern could be achieved with a circular loop, but due to the necessary suspension points it would be difficult to achieve. /* Ad banner 160 x 600 */ EZNEC also takes different soil conditions, construction height and wire gauge into account, so that I trust the program more than the usual simple calculation formulas c, f and k. EZNEC now requires that the suspension points be entered in a three-dimensional coordinate system. I'm amazed at how a "shorted-out antenna" can even work at all more or less so well! In fact, the upper band values improve here, but the SWR gets worse at 80 meters. Any port in a storm, but I would worry about the take-off-angle of an 80m vertical loop used on 10m. Even the reduced in the freeware version number of measurement points (segments) are sufficient for this simple antenna completely. Hey Jerry - I'll bet you didn't see any winds like that back in Martinez, eh? The Z axis denotes the height of the suspension points, in my case this is both my Versa Tower as a starting point and feed. The rogue wind of 12/17/12 bent the moly steel mast 90 degrees to the east and that resulted in the boom of the C 31 XR being parallel to the tower. InformationHam Hints HumorHam Radio News!Post ReviewsProduct ReviewsHam Radio Videos! easy it is to build and how well it performs. My question, essentially, is whether the feedline and balun choice can be optimized for not just one, but two bands 80m and 40m. Next, the total length of the wire was to be determined. actually allow the wire to float, but they did quite easily.The wire 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. air and about a foot or two away from the masts, I merely tied off the It always handles full legal limit power with no problems. 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. Using a 160 meter full wave loop in that fashion is likely to be counterproductive. This added height will be how high the base of the antenna will be above ground. 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. As a comparison, I have shown the results of the Deltaloop with chicken ladder below, with very interesting results and conclusions. 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. The impedance at the loop resonant frequency is approximately 100 ohms but will very slightly on harmonics. I lived down Morello Ave a few blocks from (just past Viano) you years ago and never had any ugly wind problems there! 5-14. Even up on the hill in Martinez it wasn't bad. This has all sorts of nasty effects, think of: interference, EMI, RFI disrupted radiation pattern of the antenna, restless noise level. Opinions please? Out in the pasture was a square shaped full wavelength 80 meter horizontal loop supported by wooden masts at each corner. well. W5E2 into column 1, i. so wire1 / end1 meets wire5 / end2. Well, some.. depending on your choice of For KW I have an 18m Versa-Tower and 3-Element-Beam for 20/15/10 m, with which I was active mostly on 20 m, because lately on 10 and 15 m relatively little was going on. 20m.I am primarily a cw op but I do get on phone as The transceiver is an Icom 7300 which tunes SWR 3:1 or less. rev2023.5.1.43405. Your sag will depend on the type and size of work a lot of DX in all directions as the other designs have for me. What were the most popular text editors for MS-DOS in the 1980s? 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. Now we're in Folsom and get all kinds of strange weather! In fact, the performance of this 80 meter horizontal loop antenna, well it's almost unbelievable. duty, I could pull it tight. The Delta Loop is not only a great transmitting antenna but a low noise receiving antenna. If you need any help, we are glad to assist you with writing your article based on the information you supply. ), and about 20 percentof the total QSO's were 5x5 to But not 102 MPH, for sure!!! @enzo I see now that I misinterpreted your layout for the antenna. 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. That was then 86 m. The above SWR diagram was calculated assuming an input impedance of 50 ohms. Not the greatest, but it works. I don't operate 30 meters so I don't care about that. On time Heinz, DL9NDG, appeared to me with the antenna analyzer minVNA, which he had borrowed shortly before from the other Heinz, DD9KA. tower and three masts, each 35 to 40 feet long, made from 2 inch nets I was 20 over S9 to otherWA and OR stations who were 100-200 Each of the three sides is a shade over 88 feet long. Ideally you would want to run the balanced line all the way to your antenna tuner. Brought the twin lead into the shack to the tuner via the built in 4:1 balun. 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? Sincerely 73 de Clinton Herbert, AB7RG. Give a dela loop a try, you won't be sorry! //-->. 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. An In-Room, 80-Meter Transmitting Multiturn Loop Antenna QST February 1996, pp. Connect and share knowledge within a single location that is structured and easy to search. It seemed to do better than a 160 meter inverted-L and a 240 foot dipole fed with open wire up 40 feet. I had the chance to compare a 130ft horizontal loop with a 130ft end fed and they were pretty much a wash on 40-10 with the EF being easier to hang. google_ad_width = 160; It outperforms dipoles and OCF antennas. Dimension "A" is the height of the antenna from the base to the apex, not the length of each of the vertical wires. Repeater In this video I will show you the 100 Watt Alpha Loop from Alpha Antenna. On the other bands it works well enough to suit me. This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. far! Once you try a loop antenna you will know why they are so popular with old timers but still a secret to newcomers. This is because not only does the coaxial cables sheath radiate while transmitting, but the sheath also acts as a receiving antenna. 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. The Delta Loop is not only a great transmitting antenna but a low noise receiving antenna. Then the spruce side was raised again and a new measurement was made. happy to say this simple antenna far exceeded my expectations!What I For Amateur Radio News and Trends, please visit my news site at https://bigislandarrlnews.com.Aloha es 73 de Russ (KH6JRM). And all since July 12th, 2014Thanks for the idea - my first loop since I got my license in If matched properly with the suggested quarter wavelength of 75-ohm transmission line, you should see the following SWR curves. RG 213 coax (chosen for The bandwidth at SWR. 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. Click here for a detailed building description. Tune Around!SEARCHCQ-Calling All The 80 meter Delta Loop is mounted in a vertical plane. For the other two suspension points are the TV antenna mast on the house roof and a high spruce at the rear edge of the property. As indicated in the handbook, even with me the antenna cost a penny, because I could take everything of my crafting box. Will try to get it in the air! commercially made baluns. On 75 and 80 meters, you should have about a 220 kHz bandwidth. Copy the n-largest files from a certain directory to the current one, A boy can regenerate, so demons eat him for years. 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. This Delta Loop is a three-sided antenna suspended high in the air by vertical supports, such as tall evergreen trees. HF & ShortwaveLicense StudyLinksMidi MusicReading RoomRepeater Basics If you attempt to use it on other bands, the SWR will be relatively high and there will be significant loss in the feedline. Delta Loop Skywire Antenna 80m - 10m The Delta Loop (Skywire) Antenna Legends, Theory and Reality German Version Summary Karl, DK5EC, describes the construction of a simple multiband delta loop antenna (skywire) for the 80m - 10 m bands. few! meters were either 5x7 or 5x9 reports "both ways". According to Rich, this antenna is resonant at 3.650 MHz. 1983I am sold!I have been telling other ops about how Am I working any DX with ityes! My preferences have now changed, so I had to do something for the two bands. by W0MHS, QST Nov. 1985, page 20 and ARRL Antenna Book 16th edition, pages weeks of casual operating! wire to the top of masts (Figure A below). loop on 10 meters and a rectangular loop on 20 meters, (50+ countries in 3 https://bigislandarrlnews.com. The 1:2 BalUn is built around two FT240-43 ferrite toroidal cores. Your reward will be quiet HF antenna with a bit of gain over a dipole. Finally, I found the best description in the ARRL Handbook. This antenna will present an acceptable SWR over a relatively small portion of the 80M band (see below). eyebolt nuts with two flat washers.The coax is taped to a ten-inch It was perched on a 2.5 inch OD, 1/4 inch thick wall, moly steel mast and turned by a Tailtwister. Anyone do the same Delta but horizontal? /* Ad banner 160 x 600 */ I have built both square and delta loops and have always fed them directly with 50 ohm coax through a 4:1 CURRENT balun. Air conditioner in the car: an important companion through the summer! The part wire no. 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. This antenna is also rated at the full legal limit on all modes. Each of the three sides is a shade over 88 feet long. rope to whatever was handy (i.e.- nearby barn roof, tree etc.). For the latest Amateur/Ham Radio news and information, please visit these web sites: http://www.HawaiiARRL.info. 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 worked all over the USA With the antenna calculation program EZNEC, the setup is theoretically prepared and documented with the inexpensive antenna analyzer miniVNA or graphically documented. 573. 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. space! Each support is "supported" by one inch diameter To my delight, however, the SWR improved to an acceptable 1: 1.7 at 40m. Now we're in Folsom and get all kinds of strange weather!