Posts

Building an Air Choke or "Ugly Balun". Post 1691.

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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=JCKrrKwTfXg This excellent video from Jim Haslett shows you how to build a simple, effective, and inexpensive Air Choke or "Ugly Balun" for your HF antenna. The purpose of choke balun is to create a high-impedance to common mode currents that would flow on the outside of coaxial cable shielding.  The "ugly balun" will ensure a better radiation pattern for your HF antenna. Most of the materials for this project can be found at your neighborhood home improvement outlet or from an electrical contractor. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://oahuarrlnews.wordpress.com. https://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com

VLF earth-mode receiving system (latest). Post 1690.

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If you can't see the video, please insert this title URL into your search box: https://www.youtube.com/watch?v=4MJHQCUVyeU. Here's a great project for those interested in tapping into the often strange world of Very Low Frequencies (VLF).  G3XBM shows us his latest VLF "earth-mode receiving system" using a simple tuned loop, a single FET impedance converter, an external USB sound card, and an ASUS notebook running Spartan Software. If you have a few spare hours during the week, why not try this VLF antenna? The "radio basement" is a fun place to explore. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://oahuarrlnews.wordpress.com. https://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://www.eham.net. http://www.southgatearc.org. Than

Portable HF Antenna. Post 1689.

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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=vu2jD0qd8Vo In this video, M.B. Bushcraft show us the antenna he plans to use during a summer SOTA (Summits On The Air) expedition to Mt. Wheeler.  M.B. says it's necessary to pre-test all of your equipment, especially if you're going to operate for several days from a remote location.  His antenna is efficient, well-designed, and uses a good ground radial system. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). 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).

VE2ZAZ-First EME Radio Contact with HB9Q. Post 1688.

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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=nfrPwdmmky4. The thrill of discovery awaits those radio amateurs willing to try something new.  In this video, VE2ZAZ documents his first EME (Moonbounce) contact with HB9Q.  A comparison between the two stations is fascinating.  While HB9Q's station is quite impressive (50-foot/15 meter dish running about 1 kw of power), VE2ZAZ's equipment is much simpler--a 13-element yagi cut for 432 MHz running around 80 watts.  With a little ingenuity, you can get on EME with modest equipment and a stable digital mode such as JT65B. That's the mode HB9Q and VE2ZAZ used in this video.  For the latest Amateur/Ham news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://oahuarrlnews.wordpress.com. https://hamra

More 14 MHz USA contacts with a half square antenna. Post 1687.

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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=n_lmzHe40O0. Australian radio amateur Peter Parker (VK3YE) continues his QRP experiments on a nearby beach.  This time, he uses a half square antenna mounted in the wet sand to establish some excellent contacts with the USA.  A half square antenna is fairly easy to build and it delivers a bit more gain over a 1/2 wave horizontal dipole antenna. For the latest Amateur/Ham Radio news and information, please visit these web sites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). 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).