Posts

Antenna Coax Cable Window Pass Through – Radio/TV. Post 2012.

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If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=KRmbezrkGoc. Thanks to "Tinker John" (W5CYF) for this simple, quick, and inexpensive way to bring your antenna coaxial feed line into your shack.  Although several companies sell similar devices (DX Engineering and MFJ), you may have more fun making your own pass-through panel, "Tinker John" does an excellent job of showing us how to make this practical and often necessary tool for your ham shack. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.blubrry.com/arrlaudionews/ https://oahuarrlnews.wordpress.com. https://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://www.eham.net. http://www.southgatearc.org. Just a quick note:  I've changed the URL for this site.  Although the old URL (https://kh6jrm.blogspot.co

Moxon Antenna A Great First Beam. Post 2011.

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If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=jUiKZ3EIiIc. If you need a compact, simple, and inexpensive 2-element HF beam for your amateur radio station, then the "Moxon Antenna" or "Moxon Rectangle" is for you. The Moxon Antenna is a simple and mechanically robust two-element parasitic array antenna that exhibits modest gain and some directivity.  The antenna is named after it inventor Les Moxon (G6XN). In this video from HC1ZIX, we get an exceptionally clear discussion of the theory, design, and advantages of this easily-made antenna.  Why not build this antenna for your home or portable station?   You may be surprised just how well this basic "rectangle antenna" performs. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.blubrry.com/arrlaudionews/ https://oahuarrlnews

Feeding a Large Loop. Post 2010.

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If you can't see this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=UmAJGZPx3Jo. There are several ways to feed a large (at least 1 wavelength in circumference) loop antenna. Stan Gibilisco (W1GV) shows an easy way to use either 50 ohm or 75 ohm coaxial cable as your feedline.  Although the loop can use 50 ohm feed line, the SWR would be approximately 2:1, assuming the loop's impedance measured between 100 and 120 ohms.  The SWR would drop a bit if you used 75 ohm coaxial cable and a 50 ohm coaxial cable matching section. With this arrangement, you would have an excellent monoband HF Loop.  An antenna transmatch (i.e. "tuner") would allow use on a few other amateur radio bands. For my 40 meter horizontal loop, I use 450 ohm ladder line into a balanced "tuner" to enable multiband capability from 40 meters through 10 meters.  Either feed line arrangement should give you hours of excellent contacts,

home made MAG loop for 7-10-14 mhz. Post 2009.

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If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=josWRM_L2-k. In his notes, G6URM apologizes for misnaming his antenna a "Delta Loop."  Other than that small error, the video is well-made, easy-to-understand, and a joy to watch.  According to G6URM, the antenna was "made from a lump of HELIAX and some junk box stuff."  Great design for those living in antenna-restricted homes or apartments.  Just a quick note:  After many years of using my old blogspot URL, I've finally switched to a custom URL from Google Domains.  Although https://kh6jrm.blogspot can still be used, my new URL is https://www.simplehamradioantennas.com. Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).

Coax cable portable magnetic loop for 80 and 160m. Post 2008.

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If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=kg_jyG8GQiI. Here's another fascinating portable antenna from Australian radio amateur Peter Parker (VK3YE). In this video, Peter uses some extra coaxial cable to create a magnetic loop antenna for the 80 and 160 meter Amateur Radio bands.  The accompanying tuning box will allow operations on 15 meters as well.  A nice, simple, inexpensive antenna for both home and field use. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.blubrry.com/arrlaudionews/ https://oahuarrlnews.wordpress.com. https://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://www.eham.net. http://www.southgatearc.org. Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).