It may be reproduced in its entirety as long as you make no profit and credit is given to QST, Your email address will not be published. WebOne commercially made antenna mfg that can be easily tuned to 10 meters is the Solarcon Antron 99 series and the Solarcon Imax 2000 verticals with great success. Include your email address to get a message when this question is answered. Also you need: U bolts, screw, nuts, time and courage! Right in the middle, cut one of the two wires and cut back about 2cm from each strand. 2 Element Helical Yagi Beam for 40m A helically wound two element 40 meter yagi beam antenna from a 1974 Locate your antenna as close as possible to your radio room to prevent loss of RF energy. Were going for portability here! Like magic! I used 1-inch x 2 1/2-inch aluminum angle scrap because it looked about right. Your local hardware store has aluminum angle in various dimensions and lengths. . The length of a reflector for a two-element Yagi with 0.116-wavelength element spacing should be 18 feet 1/2-inches. Approximate Resonant Feedpoint Impedance = 135.777 Ohms before added matching section. Explore the 12- and 17-meter bands with this small, lightweight Yagi. My manuscript had a different sequence, but I was persuaded by the editor to change it. 28.7K subscribers. This approach to matching a feed line to an antenna uses the antenna itself as an impedance transformer. 205, fig. The three telescoping sizes available at my local hardware store were 1 inch, 7/8 inch and 3 /4 inchperfect! The center conductor of the coax is connected to the same driven element through a capacitor (eliminating the short circuit) some distance away from the center. I cut a piece of 5/8- inch plastic tubing to a length of 5 inches and cut the 1/2-inch aluminum rod (tubing will work) to 24 inches. Not perfectly ideal but acceptable enough if you wanted to run both bands with one antenna. A two element 10-Meter beam designed for portable or permanent installation. When youre done, tighten the hardware on the gamma match, as it will not be moved again. . Mostly HF beams, including the trapped Hygain TH6DXX. hq@arrl.org. WebHow to Build a 10 and 11 meter 1/4 wave Ground plane that almost no one can see. Web10-Meter MoxBeam, KG4JJH 3 of 12 tension on the wire and tape, measure out 1 ft-103/ 16 inches (Figure 9, dimension B) and mark the wire. Normally the capacitor should be tuned first, but as you will find if you construct the antenna, the fit of the the inner rod, the plastic tubing (the capacitors dielectric) and the outer tube is quite tight. Sound Card Interfacing for RTTY, PSK31, and SSTV, A low cost 600 watt ultra-linear amplifier, VE7AVV YAESU FL-2100Z Amplifier Repairs. Leaving the hose clamps over the element slots loose, I adjusted the driven element length to about 17 feet and the reflector to about 18 feet 1/2 inch. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/dc\/Build-Several-Easy-Antennas-for-Amateur-Radio-Step-1.jpg\/v4-460px-Build-Several-Easy-Antennas-for-Amateur-Radio-Step-1.jpg","bigUrl":"\/images\/thumb\/d\/dc\/Build-Several-Easy-Antennas-for-Amateur-Radio-Step-1.jpg\/aid902279-v4-728px-Build-Several-Easy-Antennas-for-Amateur-Radio-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"