Since winter is upon us with a fury there is no way to repair any of the mess until Spring. Per the Alpha Antenna website; "Portable HF Magnetic Loop MagLoop antenna with cove. I'd like to put up an 80m delta loop. Definitely! 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. cwJM7 20m cwA92 20m SSB5T0 Thanks for your support! Balun in the air at feedpoint (4:1? eyebolt nuts with two flat washers.The coax is taped to a ten-inch Loop Antennas and Calculator. 1). 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). longer to start with to better fit my backyard. Best antenna I have used in 50 years of hamming. from the tower I used an electric service entrance insulator fastened by 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. ARRL Antenna Book page 5-17) the antenna wire as Thanks for the feedback and thanks for your service in the USN. It is fed at the top (90 feet) with RG 213 (200 foot run to the shack) through a 4:1 current 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. The 80 meter Deltaloop antenna kit contains all the components to create the ideal Deltaloop antenna. According to Rich, this antenna is resonant at 3.650 MHz. I use a 1:1 balun. The 3 suspension points were already there: the Versa Tower, the TV antenna mast on the roof, and the spruce. I wish I had tried this antenna sooner in my ham hobby years. Manual 1:2 BalUn 600 Watts for Delta-loop & Quad-loop antennas mechanical build process for a 160m-long multiband loop antenna, including its support system, tuning, and SWR analysis. steel guy wire attached by a u-bolt in the opposite direction of the wires The delta loop is 264.5 feet in total length. HF Loop Antennas - American Radio Relay League It worked just fine 80 10. wires and pulleysand installed, raising the wire becomes a one-man That has left me with the last minute idea 80 meter delta loop as my only 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. There are several ways to solve this problem. (Note: #1 is available to antennas, not only is the old saying "the higher the better" true, but the loop, with a couple bands requiring a lot of patience! Much has been printed Give a dela loop a try, you won't be sorry! 80-meter loop is about 270 feet long (1005 divided by frequency in MHz) or At the top (90 ft) on the east side of the tower was a pulley which held my 160-6 meter homebrew OCFD. critical according to my results.In my opinion, when constructing As a wire length, I roughly took the values from the EZNEC calculations, but I only measured those with my stride length. 80 meter full wave square horizontal loop feed by 600 ohm ladder line from link coupled balanced tuner. few! Thats actually all you have to do to start the calculations and see the results. If matched properly with the suggested quarter wavelength of 75-ohm transmission line, you should see the following SWR curves. Jim / W6JHB. "HO-HO-HOHPLs" by W4RNL The direction of fire is broadside to the antenna. (Updated August 1, 2014 I like loops. Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? This added height will be how high the base of the antenna will be above ground. If you continue to use the website, we assume that you agree. According to Rich, this antenna is resonant at 3.650 MHz. Hey Jerry - I'll bet you didn't see any winds like that back in Martinez, eh? Full Wave Horizontal Loop Antenna - Wireless Girl Loop Antenna Notes.updated Dec. 2012 . WOW! 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. By using a good BalUn, Common mode current are prevented, which also reduces interference from your direct environment. Height above ground range. 5x1 quality "both ways".For those doing the math, call the remaining 5 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. 80 meters 133-j50 40 meters 272-j105 20 meters 279-j80 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. As a comparison, I have shown the results of the Deltaloop with chicken ladder below, with very interesting results and conclusions. Delta-loop antenna 80m - Christina Cherry Although I have mostly tried this antenna on wire to the top of masts (Figure A below). This is where the standard is set. For example why not feed with 450ohm line, then a 9:1 balun into coax? Amateur Radio Bicycle Mobile Setup. fromPaul -KB4GYT listening to A92HK on the loop. 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. 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. Delta Loop Antenna Plans : Plans and projects on home made delta loops I quickly found a suitable BNC adapter on PL, and off we went. http://www.arrl.org. 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. it has out-performed my OCF dipole, dipole and inverted L, when ALL bands from 10-160 are taken into account. . The top section of tower above the top guy point is bent slightly. drops 30 feet straight down into my shack. Dimension "A" is the height of the antenna from the base to the apex, not the length of each of the vertical wires. google_ad_height = 600; diagram. A Practical Antenna for 160 Metres. Feedback QST May 1996, p. 48. Heinz I and II left the antenna analyzer to me and I was able to keep it quiet. What are some drawbacks to delta loop antennas? post hanging off near the top of tower for one of the four required N6JSX: A regular, traditional 160 ant such as an inverted-L smokes this ant on 160.as it should. I am new to HF. The second toroid is responsible for the impedance matching from 50 Ohm to 100 Ohm. Your reward will be quiet HF antenna with a bit of gain over a dipole. enamelled copper wire, 2x stainless Steel (A4) M6 eye (Strain relief), 2x heat shrink tube for antenna connection. All stainless steel, 600 Watt, with proper strain relief. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? Now with a handy mounting plate to attach both ring cores, so gluing is no longer necessary. Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? Anyone do the same Delta but horizontal? eHam.net is a community web site for amateur (ham) radio operators around the world. 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. Due to the high resolution, even the theoretical resonance value or SWR of 1: 1 with 50.4 ohms is now reached. What is the symbol (which looks similar to an equals sign) called? It was perched on a 2.5 inch OD, 1/4 inch thick wall, moly steel mast and turned by a Tailtwister. Read the coordinate image if I moved the mouse pointer over the respective segment. Not the best antenna, but it works. My question, essentially, is whether the feedline and balun choice can be optimized for not just one, but two bands 80m and 40m. or even a rectangular loop is easier on the pocketbook and muscles to put
