If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=oloLbE968Cg. Would you like to increase the gain and directivity of your 15 meter dipole antenna? You can, if you make a few modifications to its length and are willing to use a balanced feed line and an antenna transmatch (i.e. "tuner"). This video is based on a design by George Murphy (VE3ERP). The Extended Double Zepp Antenna is simple, efficient, and exhibits nearly 3 dBi gain over the "classic" 1/2 wavelength horizontal dipole. I've used a variety of extended double zepp antennas during ARRL Field Days and can attest to their outstanding performance. The major limiting factor of this antenna is the extra space needed for each antenna element--which will be 5/8 wavelength each compared to 1/4 wavelength each for the regular dipole. For the latest Amateur/Ham Radio news and information, please visit these web sites: http:
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If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=oIoLbe968Cg. Here's an antenna project that could get you some additional gain and directivity on the HF band of your choice. Because of size considerations, BYRONLOCAL decided to design, build, and use a 15 meter extended double zepp antenna for his ham station. The extended double zepp is a collinear array of two 5/8 waves in phase. This video provides an excellent overview of the theory and construction practices used to build this antenna. Applicable formulas and scale drawings are provided to guide you in the construction of this antenna. For the latest Amateur Radio news and information, please visit these websites: http://www.HawaiiARRL.info. https://oahuarrlnews.wordpress.com. https://bigislandarrlnews.com. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast updated each Friday). https://paper.li/kh6jrm/143028935