Due to the metal Versa-Towers house wall-carrying a chicken ladder would be difficult to realize, and a thick Matchbox I have not. 40 Meters with a Phased Delta Loop QST May 1984, pp. N6JSX: A regular, traditional 160 ant such as an inverted-L smokes this ant on 160.as it should. The site will be something of which everyone involved can be proud to say they were a part. If matched properly with the suggested quarter wavelength of 75-ohm transmission line, you should see the following SWR curves. was the same as "received" most of the time. Overall I thought this was a fantastic antenna. Remember to add at least 8 feet to dimension "A". "HO-HO-HOHPLs" by W4RNL 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. my time and effort putting the tribander back up. Take care. 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. or even a rectangular loop is easier on the pocketbook and muscles to put It is made from 12-gauge insulated wire. I don't have 6 meter capability (yet!) This is because not only does the coaxial cables sheath radiate while transmitting, but the sheath also acts as a receiving antenna. up and would provide about the same results.To support my loop made 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; Thanks. With the antenna calculation program EZNEC, the setup is theoretically prepared and documented with the inexpensive antenna analyzer miniVNA or graphically documented. The diagram nicely shows the resonances at 3.6 MHz and their multiples. Noise Suppression up to 38 dB, Receiver Impedance/Isolation Transformers, Broad Band Terminated Dipoles (BBTD, T2FD). 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. search. google_ad_slot = "1982258389"; What are some drawbacks to delta loop antennas? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Of all the antennas I've built and tested this one works the best. On 75 and 80 meters, you should have about a 220 kHz bandwidth. Loop antennas may be constructed in many forms including horizontal full wave loops in square, rectangle or triangle (delta) shapes. Post #1555. i have a VERTICAL delta loop cut for 80 meters.Fed at the corner. Hams!About HamuniverseAntenna DesignAntenna Safety! 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). 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. summary.." I LOVED MY LOOP"73, John 2023 ON THE SQUID is proudly powered by WordPress - BloggingPro theme by: Design Disease. The second toroid is responsible for the impedance matching from 50 Ohm to 100 Ohm. feet of wire and a tuner. up each mast one-by-one with the rope and pulley. He also rips off an arm to use as a sword. Out in the pasture was a square shaped full wavelength 80 meter horizontal loop supported by wooden masts at each corner. https://bigislandarrlnews.com. mechanical build process for a 160m-long multiband loop antenna, including its support system, tuning, and SWR analysis. The goals of the project were to provide an optimized antenna for 40m, 80m, 20m, and all other HF ham bands, in that order of priority. Maybe it has to do with the unequal sides and tilt? "Signpost" puzzle from Tatham's collection, the Allied commanders were appalled to learn that 300 glider troops had drowned at sea. long bottom extension of the PVC T to remove strain on the hanging Trapped dipole for 40-80-160 meters. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Height above ground range. Thank you for visiting my Amateur Radio Blog. First of all, I made myself smart in Rothammel, ARRL Handbook and Internet. rev2023.5.1.43405. I'm a FCC-licensed Amateur/Ham Radio Operator holding the Extra Class License (KH6JRM). On 160 meters you should see about 110 kHz bandwidth. around antenna I ever used.I liked it so much I decided not to waste After getting fit in theory, I started building the antenna. Length of a full-wave BD4.DX worked on 17 meters was KL7 and OH1. 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. Full Wave Loop Antenna Calculator - 66pacific.com At 7 MHz I have theoretical 128 ohms and SWR of 1: 2.8. were 5x9 +20! (Note: #1 is available to The direction of fire is broadside to the antenna. This 1:2 BalUn scores very well both in terms of common mode current attenuation and impedance matching. Do you already have specific dimensions in mind? I have built both square and delta loops and have always fed them directly with 50 ohm coax through a 4:1 CURRENT balun. 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. 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. The also exhibit gain on harmonic bands. Anyone do the same Delta but horizontal? Like this post? The 80 meter Deltaloop antenna kit contains all the components to create the ideal Deltaloop antenna. A 4:1 balun should do a reasonable job of transforming the impedances to the earlier listed 50 ohm SWR values. it has out-performed my OCF dipole, dipole and inverted L, when ALL bands from 10-160 are taken into account. Until Monday, 12/17/12,when a 102 MPH windstorm hit my QTH I had four HF antennas at my QTH in Eastern Oregon. By using a good BalUn, Common mode current are prevented, which also reduces interference from your direct environment. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). the auto-tuner on my TS-570D since my Tucker 1.5 kW tuner easily handled In fact you can find this triangle or Delta configuration, in the ARRL antenna handbook 19th Edition . 14,95 U.K About Us | Contact | Website Terms & Conditions|Privacy Policy Why not equip your bicycle for 2 meter/70 cm mobile operation? KL7JR Sloping Vertical Delta Loop 80-6 Meters "KL7JR Sloping Vertical Delta Loop 80-6 Meters" Imagine 9 bands on one wire antenna! The exact values for the best SWR and other interesting values can be read in the lines above the diagram. Not the best antenna, but it works. Using a 160 meter full wave loop in that fashion is likely to be counterproductive. AND IT IS WORKING DX JUST FINE. Believe me when I say, it was the best all On the other hand, the SWR, to my delight at 40m, improved to an acceptable 1: 1.7. 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. Cubical quads. It outperforms dipoles and OCF antennas. Simple Ham Radio Antennas: Delta Loop Antenna 40 through 10 meters 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). The Delta Loop is not only a great transmitting antenna but a low noise receiving antenna. 20-22 An inexpensive, easy to build full wave wire loop for 80- or 40-meters. 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. 4,95 The Netherlands (letterbox) Please submit any Amateur Radio related news or stories that you would like to see, here on eHam.net. This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. I fed it with 300ohm TV twin lead at one of the bottom corners. KL7JR, 1. Ideally you would want to run the balanced line all the way to your antenna tuner. 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. right.For the feedpoint connection I used a 1-1/2" PVC pipe T This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. The performance by CW/digital band segment of this antenna is: These results were obtained over real, average ground. Tune Around!SEARCHCQ-Calling All In fact, the upper band values improve here, but the SWR gets worse at 80 meters. ARRL Antenna Book page 5-17) the antenna wire as 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. The center feed optimizes the results compared to a corner feed. Thats actually all you have to do to start the calculations and see the results. Which is better in my situation: Balanced dipole, or as much wire as possible in the air? 80 Meter Antenna Projects : Antenna projects for 80 meters band This antenna is also rated at the full legal limit on all modes. 573. Once I re-build the horizontal loop I do intend to do some comparisons. I don't operate 30 meters so I don't care about that. Loop antennas may be constructed in many forms including horizontal full wave loops in square, rectangle or triangle (delta) shapes. I use window line from the feed point into my shack and then to a 4:1 Balun in my shack. Post #1554. Once the wire was in the It did however work as an awesome 160 receive antenna option. 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. 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. Any antenna tuned for 80 Meters should also work on 20 and 10 meters as well. If you need any help, we are glad to assist you with writing your article based on the information you supply. In the higher bands, the directional characteristic and Verzifpelung correspondingly more pronounced. 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. into that here. few! WOW! The 80 meter Delta Loop is mounted in a vertical plane. 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. to take up a bit more slack from one pulley (the wire pulls through all 80 METER ALL BAND LOOP - "I LOVE MY LOOP" BY KL7JR - hamuniverse.com meters were either 5x7 or 5x9 reports "both ways". 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. Air conditioner in the car: an important companion through the summer! HF Loop Antennas - American Radio Relay League Read the coordinate image if I moved the mouse pointer over the respective segment. It outperforms dipoles and OCF antennas. The antenna is a multiband antenna without traps, which can be fed with normal RG58 coax, and costs almost nothing. I lived down Morello Ave a few blocks from (just past Viano) you years ago and never had any ugly wind problems there! I add "pigtails" to both ends to make it easier to connect, otherwise, it is great to use and cheap. So, my "longer" loop is I agree with the praise of the true differential tuner like the Johnson Matchbox, and also with the greatest bargain of all time the Radio Shack 300 ohm twin cable. Delta Loop Antenna Plans : Plans and projects on home made delta loops 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. in QST over the years on loop antennas. 7 Cool Delta Loop Antenna Projects for 40 meters - The DXZone I am new to HF. Feed point is approx 18-20' AGL and the Loop is mostly a square box. 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. know that I built the KL7JR Sloping Vertical Delta Loop and I am having a 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. wire used. Hamuniverse.com uses Green Geeks Web As it turned out, I was not so far off with my guessed values. 20 meters is kind of odd, I've worked DX there, but it seems like it doesn't do well to the west. Not the greatest, but it works. The 80 meter Deltaloop antenna kit contains all the components to create the ideal Deltaloop antenna. air and about a foot or two away from the masts, I merely tied off the 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. http://www.arrl.org. http://www.arrl.org. google_ad_height = 600; antennas". But not 102 MPH, for sure!!! L.B. 7 Delta Loops for 7 MHz. Each leg is 94.37 feet. Never will Go back to a dipole or G5RV again. With the SWR button you can now display the resonances of the antenna structure over any frequency range, as shown below. with the other three supports. 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. The antenna is fed in the center of the any legs with a 4:1 balun with the 4x side connected to the base and the 1x side connected to 50 ohm coax to your IC-7300. Some people use open wire line and feed a 80 or 40 meter loop on multiple frequencies. Thanks for the feedback and thanks for your service in the USN. 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 telegraph wire is #6 AWG Should I re-do this cinched PEX connection? found to be so appealing about this antenna was that it was fairly Each of the three sides is a shade over 88 feet long. Balun in the air at feedpoint (4:1? The loop loaded easily on all bands 10-80 meters with my new LDG Electronics RT-11 tuner and old FT-840 transceiver. Loop antennas, which delta loops are a subset, are closed-circuit antennas in which a conductor is formed in a turn, so that the ends are connected. far! https://amateurradionewsinformation.com (Amateur Radio News & Information). An In-Room, 80-Meter Transmitting Multiturn Loop Antenna QST February 1996, pp.
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