With these dimensions the antenna should be resonant at about 146.5 Mhz. Otherwise just use a couple of cable ties or electrical tape to secure the coax to the antenna. Now before you solder, you can drill a hole in your boom and thread the coax inside the pipe. Youll solder these two ends to the driven element of the antenna. Take your 5 inch piece of wire and strip 14 inch off each end. Using the hose clamps, attach each half of the driven elements to the Cross connector. Making sure they are centered, use the hose clamps to attach the elements to the T and Cross connectors. Its easier to tin this area now before attaching the elements to the support boom. This is where we will solder the the coax and the hairpin match. The driven element is made up of two pieces, so cut two pieces that are 17 34 inches long. One piece will be 41 38 inch and the second will be 35 18 inch. The distance between the first cross and the middle cross has to be 8 inches and the distance between the middle cross and and the T has to be 12 12 inches. You may PVC cement if you wish to make the connections permanent, otherwise dry fitting them will be fine. One piece will be 11 14 inches long and the second will be 6 78 inches long. This lightweight antenna is perfect to use for fox hunts or as a portable directional antenna for public service events. 2M Yagi Calculator Portable Directional Antenna Our club was looking for activities for the coming year that were a little more social, so a fox hunt was recommended.īut it was getting a little bit scuffed and the cable was all ratty. That antenna served me well and not only sniffed out hidden transmitters, but also located an individual causing malicious interference to our local repeater. I did my first fox hunt more than 15 years ago and built a tape measure yagi antenna for that purpose. The DL6WU Yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a useful pattern. Long Yagi are commonly used from the 144MHz amateur band to the 2.4GHz band. Yagi Calculator is a program build to produces dimensions for a DL6WU style long Yagi antenna. This calculator is for short boom simple multi element monoband yagi antennas, and will not give you a perfect 50 ohm match.įor advanced design look at the picture on the page for Eznec Software to get an idea of the shape you should be looking for. 2M Yagi Calculator Portable Directional Antenna.
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