Posts

Ham Radio - Investigating the 'Inverted L' Antenna. Post #1370.

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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=PyLA0ZqcXc. Building and using an antenna for 160 and 80 meters can be a definite challenge for those of us living on small urban lots.  One of the best ways to reach these bands is to design, construct, and use the classic "Inverted L" Antenna.  In this video, GreggW. (OH2FFY) does an excellent job of explaining the theory and practical construction procedures needed to make an effective, simple, and inexpensive Inverted L to fit your property.  Now that propagation is favoring 160, 80, and 40 meters, the inverted L should be an antenna worth considering. 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 which is updated each Friday). http://

Ham Radio Modular Portable Antenna System. Post #1369.

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If you can't view this video, please insert this title URL into your browser search box: https://youtu.be/BOHvM_2G340. In this video from Julian (OH8STN--Survival Tech Nord), we see a variety of modular antenna systems suitable for portable or emergency use.  Most of the modular kits use some variation of the Chameleon line of HF antennas and a small QRP rig, such as the Yaesu FT-817 transceiver.  Julian presents some excellent suggestions for portable and emergency antennas, as well as ideas for your emergency "go-box" or "go-kit".  An excellent, well organized introduction to portable HF antennas. For the latest Amateur Radio news and information, please visit these websites: http://www.Hawaii ARRL.info. https://oahuarrlnews.wordpress.com. https://bigislandarrlnews.com. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday). http://amateurradionewsinformation.com (Amateur Radio News & Informat

Antenna cutting tape measure for Emergency Communications. Post#1368.

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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=GLDRafkpUdg. Here's a simple device you can use to measure antenna elements for both home and portable use.  You can take this step a bit further by using a metal (usually steel) tape measure to make antenna elements.  Just cut the metal tape measure to the required length using the usual dipole antenna formula.  I've seen 2 m and 70 cm yagi beams made from metal tape measures.  They work well for RDF (radio direction finding) "fox hunts", as well as for portable or emergency antennas.  In most cases, your neighborhood building supply or electrical supply outlet can offer many items suitable for antenna use.  This video explains how a simple tape measure can make antenna design and construction a bit easier. For the latest Amateur Radio news and information, please visit these websites: http://www.HawaiiARRL.info. https://oahuarrlnews.

Portable 10 Meter Dipole Antenna For Ham Radio Field Day. Post #1367.

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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=Uzoxj73b3sw. Although the ARRL Field Day doesn't occur until the last full weekend of June, you may want to make a few antennas and test them before this popular contest.  In fact, some Amateur Radio Clubs are participating in several unofficial "Winter Field Day" events to practice before the main contest. In this video, we see a simple, easy, and inexpensive way to get on the 10 meter amateur radio band with materials you may already have in your shack.  Similar antennas can be built for 40, 20, 15, and 10 meters and set up in the same way as this video. 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 which is updated each Friday).

Tri-Band 20m 30m 40m Ground Plane Antenna. Post #1366.

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If you can't view this video, please insert this title URL into your browswer search box: https://www.youtube.com/watch?v-hZ6i2wqa8vo. Interesting video from AB8XX--something he calls a "parallel ground plane antenna." The antenna is a basic ground plane with radiating elements for 20m , 30m, and 40m separated with PVC tube spreaders. The antenna is suspended from a 60-ft/18.29 m tree branch with the feed point about 20-ft/6.09 m above ground.  AB8XX fires his antenna into neighboring trees with a super powered launcher. The antenna performs well on the bands specified. 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 which is updated each Friday). http://amateuradionewsinformation.com (Amateur Radio News & Information). Other sites of interest: Hawaii