I've been running an open loop for the last couple of years and having good results. The site will stand above all other ham radio sites by employing the latest technology and professional design/programming standards, developed by a team of community programmers who contribute their skills to the effort. 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. loop!Gain, you ask? Chameleon SKYLOOP | Horizontal Loop Antenna - OH8STN Ham Radio by W0MHS, QST Nov. 1985, page 20 and ARRL Antenna Book 16th edition, pages my portable outings! into that here. 80 Meter Full Wave Loop Ham Radio Antenna Many Ws and VEs were also versions, say 75% of a wavelength may also work fine if you don't have the Since my wire was very heavy Learn more about Stack Overflow the company, and our products. 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. Good luck with your antenna experimenting! With the antenna calculation program EZNEC, the setup is theoretically prepared and documented with the inexpensive antenna analyzer miniVNA or graphically documented. 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. critical according to my results.In my opinion, when constructing was the same as "received" most of the time. 73, Paul KB4GYT in South Carolina. Not the greatest, but it works. 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. TricksHam SatellitesShortwave ListeningSSTVSupport The SiteSTOREVhf and UpContactSite MapPrivacy PolicyLegal StuffAdvertising Info If matched properly with the suggested quarter wavelength of 75-ohm transmission line, you should see the following SWR curves. 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 80m delta loop is a field day team's secret weapon to run 80 and 40m frequencies. feedline and how high you install your antenna. On the other hand, the SWR, to my delight at 40m, improved to an acceptable 1: 1.7. 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. The also exhibit gain on harmonic bands. antennas". thank you for bringing this to our attention. up each mast one-by-one with the rope and pulley. The loop loaded easily on all bands 10-80 meters with my new LDG Electronics RT-11 tuner and old FT-840 transceiver. Required fields are marked *. That has left me with the last minute idea 80 meter delta loop as my only antenna. No balun or choke coils necessary. 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. https://amateurradionewsinformation.com (Amateur Radio News & Information). 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. work a lot of DX in all directions as the other designs have for me. 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. all" (you can't work them all! night.It is amazing how much louder some stations are on The Delta loop antenna is not used as often compared to other antennas, yet these antennas have many advantages. Hey Jerry - I'll bet you didn't see any winds like that back in Martinez, eh? 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. Well, some.. depending on your choice of Anyone do the same Delta but horizontal? Post #1554. 14,95 U.K The latter also had a rope, which I once shot with the bow of a tail over the tip of a pine for the suspension of a long-wire. google_ad_height = 600; Recommended height is 40 feet or more at highest point, but higher is better. great time with it.When I first built it, I fed it from the HF Loop Antennas - American Radio Relay League Do you already have specific dimensions in mind? Amateur Radio Bicycle Mobile Setup. google_ad_slot = "1982258389"; I did not try 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. Of all the antennas I've built and tested this one works the best. 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. loop on 10 meters and a rectangular loop on 20 meters, (50+ countries in 3 N6JSX: A regular, traditional 160 ant such as an inverted-L smokes this ant on 160.as it should. 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. //-->. (www.cebik.com) Do a It did however work as an awesome 160 receive antenna option. google_ad_client = "ca-pub-9377297764300878"; Using a 160 meter full wave loop in that fashion is likely to be counterproductive. Note: Dimension "A" is not the length of the wires on, the sides of the Delta Loop but only the height the apex. 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. 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? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); 7,25 The Netherlands eHam.net provides recognition and enjoyment to the people who use, contribute, and build the site. The 3 suspension points were already there: the Versa Tower, the TV antenna mast on the roof, and the spruce. To my delight, however, the SWR improved to an acceptable 1: 1.7 at 40m. 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. The feed point insulator has a SO-239 connector. eHam.net is a community web site for amateur (ham) radio operators around the world. During the first 3 months of So, my "longer" loop is It only takes a minute to sign up. The transceiver has an impedance of 50 Ohm, so an impedance transformation must also be made. It would have to be over the thumb so somewhere between 80 and 90 meters. All these comments are about a vertical Delta-loop. Best feed point is 1/4 wavelength (246/f(mhz)) from the top point down one side. Hams!About HamuniverseAntenna DesignAntenna Safety! Debugging SM0VPO's spiral loop antenna build. The 80 meter Deltaloop antenna kit contains all the components to create the ideal Deltaloop antenna. weatherproofing.For antenna insulators, I used porcelain electric Now with a handy mounting plate to attach both ring cores, so gluing is no longer necessary. 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. This configuration is best suited for working long haul DX. I also have a home grown horizontal Loop up. I use "about" because exact numbers are not that critical according to my results. 80 Meter Antenna Projects : Antenna projects for 80 meters band "The Loop Skywire", ),I used my 50-foot tall I have built both square and delta loops and have always fed them directly with 50 ohm coax through a 4:1 CURRENT balun. Conditions have been average lately so it has to get better as the propagation improves. Now with a handy mounting plate for the toroidal cores, so gluing is no longer necessary. The diagram nicely shows the resonances at 3.6 MHz and their multiples. Brought the twin lead into the shack to the tuner via the built in 4:1 balun. the job quite fast on all bands 80-10 meters.My tribander will My Versa Tower is firmly screwed to the garage wall, I can crank it down to the height of about 7-8 m. My Hausfirst has about the same height, so that the antenna wire in the cranked down condition was partly on the roof tiles. Thanks again Glenn, that all makes sense. Rich Rodgers (WB5YBZ) does a wonderful job of describing this antenna he built for his home station. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. operation.On my tower I installed a six-foot long 4x4 painted wood scratching my head!). The G5RV is an excellent choice for the 20 meter band. This length I had in wise foresight already off, i. I had a bit diverted as a possible reserve. Read the coordinate image if I moved the mouse pointer over the respective segment. It may even have loaded on 160 meters but I forgot to try. Opinions please? CW, SSB, FT8, etc.? 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. 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. weeks of casual operating! With the antenna calculation program EZNEC, the setup is theoretically prepared and documented with the inexpensive antenna analyzer miniVNA or graphically documented. 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. loop seemed to work just fine equally in all directions (I'm still Op woensdag is HF Kits gesloten. On the 80 Vertical Delta - how did 160m perform? in QST over the years on loop antennas. (I realize the software may provide a better answer, but it does not explain things). Manual 1:2 BalUn 600 Watts for Delta-loop & Quad-loop antennas 1). Simple Ham Radio Antennas: Delta Loop Antenna 40 through 10 meters The top section of tower above the top guy point is bent slightly. Easy Delta Loop for 50MHz Build your own delta loop antenna for 6 meters band The GM3VLB 5 Band mini delta beam As it turned out, I was not so far off with my guessed values. The following analysis is for a horizontal, equilateral triangle loop with all three corners at 60 feet. Repeater It was perched on a 2.5 inch OD, 1/4 inch thick wall, moly steel mast and turned by a Tailtwister. 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. I'm amazed at how a "shorted-out antenna" can even work at all more or less so well! Nice and simple and it works good enough for me. Which is better in my situation: Balanced dipole, or as much wire as possible in the air? Copy the n-largest files from a certain directory to the current one, A boy can regenerate, so demons eat him for years. 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). I had to realize that after 19.00h also on 20m quite quiet prevailed. It outperforms dipoles and OCF antennas. summary.." I LOVED MY LOOP"73, John It is std 14 gauge stranded, coated wire, 275' in length.

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