In recent years, the End Fed Half-Wave (EFHW) antenna has become one of the most popular antenna types, and it’s easy to see why. Its high performance on the HF bands and relatively simple setup make it an attractive option, particularly for amateur radio operators.
One of the most crucial steps in building my antenna was creating a 1:49 BALUN using an FT240-43 toroid core. This BALUN was wound with 1 mm thick copper wire, consisting of two primary windings and 14 secondary windings. This design facilitated an efficient transformation at higher frequencies. However, the real innovation in my antenna came from incorporating a 1:1 BALUN, where I wound 17 turns using RG316 coaxial cable. This addition allowed the antenna to cover a wider range of bands, including the 80-meter band, achieved by obtaining the necessary choke impedance.
Furthermore, to optimize the antenna’s performance, I added a coil with 260 turns, enabling it to operate on the 10, 15, 20, 40, and 80-meter bands.
Throughout this process, I was not alone. I want to extend my heartfelt thanks to Özkan Annakkaya TA7OZX, Emre Karakayalı TA7EK, Ali Demiralp TA7EB, and Furkan Özen TA7H, who provided invaluable support at every stage. Without their help, it would have been much more challenging to successfully complete this project.
If you’re interested in building your own antenna or looking to improve the performance of your EFHW, this article will be perfect for you!
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