The same resonance points are displayed in both diagrams! Please submit any Amateur Radio related news or stories that you would like to see, here on eHam.net. 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. X axis) is about 3 dB. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. For 80 m, the shift of the resonance is still ok, but for the higher bands, the resonance frequency wandered outside of the amateur radio ranges. Best feed point is 1/4 wavelength (246/f(mhz)) from the top point down one side. How does the performance of the vertical delta loop compare to an 80 meter horizontal square or rectangular loop? /* Ad banner 160 x 600 */ If the loop is going to be used as a single-band antenna (meaning that it will provide a feedpoint impedance of around 50 Ohms) then using coax for the feedline will work well. How to force Unity Editor/TestRunner to run at full speed when in background? Nice and simple and it works good enough for me. Now we're in Folsom and get all kinds of strange weather! My favorite vertical loop for portable and fixed use is described below. 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. The feed point insulator has a SO-239 connector. is above the horizontal base wire of the antenna. 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. few! You will also need a feed line choke or better yet, just get the Hybrid 4:1+1:1 in a single box. 573. Op woensdag is HF Kits gesloten. 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. (Updated August 1, 2014 I like loops. 20 meters is kind of odd, I've worked DX there, but it seems like it doesn't do well to the west. 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. Loop Antennas - Loop Antennas - Palomar Engineers The bandwidth at SWR. 10 and 20 meters, I was also pleased with a weekend of experimenting on 15 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. The 80m delta loop is a field day team's secret weapon to run 80 and 40m frequencies. about 67 feet per side. 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. Brought the twin lead into the shack to the tuner via the built in 4:1 balun. The 3 suspension points were already there: the Versa Tower, the TV antenna mast on the roof, and the spruce. The part wire no. Thanks very much Glenn. 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. //-->. This 1:2 BalUn scores very well both in terms of common mode current attenuation and impedance matching. 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. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. 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. To build this antenna you need a lot that is at least 100 feet across. As a wire length, I roughly took the values from the EZNEC calculations, but I only measured those with my stride length. I did not try For the latest Amateur/Ham Radio news and information, please visit these web sites: http://www.HawaiiARRL.info. Manual 1:2 BalUn 600 Watts for Delta-loop & Quad-loop antennas He also rips off an arm to use as a sword. On the other hand, the SWR, to my delight at 40m, improved to an acceptable 1: 1.7. At the spruce, I pulled the wire to target height. The top section of tower above the top guy point is bent slightly. Delta Loop Antenna Plans : Plans and projects on home made delta loops top (apex about 50 feet or so). corner.I have used it on most bands but my favorite is Balun in the air at feedpoint (4:1? L.B. I even broke several big "cloud-burner".I am bands.After gleaning all the info in the articles referenced below, All these comments are about a vertical Delta-loop. Anyone do the same Delta but horizontal? According to Rich, this antenna is resonant at 3.650 MHz. https://bigislandarrlnews.com. eHam.net provides recognition and enjoyment to the people who use, contribute, and build the site. I wanted the best SWR in the 75 meter SSB DX window and that's where it is well below 2:1. 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. 80 Meter Delta Loop Saves The Day - eHam.net 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. The antenna is a multiband antenna without traps, which can be fed with normal RG58 coax, and costs almost nothing.