Posts

Modificated RANDOM WIRE ANTENNA with 9:1 UnUn (part 2). Post 1765.

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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=9wgdhi__MlU. This part 2 of Paul's (OM0ET) Random Wire Antenna using a homemade 9:1 UnUn.  In part 1, Paul reviewed the general theory and construction steps needed to make this valuable accessory for random length wire antennas.  In part 2, Paul makes a few minor adjustments based on a few tests conducted at his shack.  The result is an attractive, functional, and portable UnUn suitable for home, portable, or emergency use.  As with most random long wire antennas, be sure to use a good ground radial or counterpoise system along with an antenna transmatch (i.e. "tuner"). 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://h

RANDOM WIRE ANTENNA with 9:1 UnUn home made (part 1). Post 1764.

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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=2M9Aep6DHz8. Random Length Wire Antennas can be a lot of fun to use if you have a sturdy balun and decent ground radial or counterpoise system to control SWR and stray RF in your shack.  In this video, Paul (OM0ET) shows us how to design and build a 9:1 UnUn for this versatile antenna.  The balun uses a T 130-26 toroid from an old PC Power Supply.  The original design comes from VK6YSF (https://vk6ysf.com/unun_9-1_v2.htm). In part 2, Paul will test the final antenna design and balun on his Xiegu X5105 transceiver running only 5 watts output. 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 with is updated each Friday afternoon). https://oahuarrlnews.wordpress.com. https://hamradiohawaii.wordpress.com. https://big

DIY QRP Magnetic Loop Ham Radio Antenna for Beginners. Post 1763.

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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=Dw1rz0CVn90. In this excellently presented video, Julien (OH8STN) helps us build our own Man Portable Magnetic Loop Antenna.  The video discusses two different magnetic loop antennas based on Chameleon Magnetic Loop station kits. According to Julien, the goal of this tutorial is to "build a practical and portable HF field antenna, which won't take up a lot of space, (and) weight, which can be used with our QRP radio on the go."  This video should give you a few ideas for your next portable and emergency HF antenna. 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

Ham Radio - The simple coax cable emergency prepper antenna. Post 1762.

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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=tafy51yUzQo. If you need a quick emergency VHF/UHF antenna requiring a minimum of tools and effort, then this video from Kevin Loughin (KB9RLW) is for you.  All you need is a tape measure, some cutting tools, a length of RG-6 television coax cable, a few "F" to BNC connectors, and some imagination to make a fully usable antenna for 2 m and 70 cm.  You may want to make one of these antennas for your emergency "go-kit" or for a spare in case your regular VHF/UHF antenna fails.  A nicely done video with plenty of good suggestions. 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:/

Portable Ham Radio Antenna Deployment. Post 1761.

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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=tjb3IdYGVNw. Portable operations in the great outdoors can be a true invigorating experience if you plan ahead.  One of the main problems with going to the "field" is launching your antenna.  Although there are all kinds of homemade and commercial devices to put your long wires, dipoles, and inverted Vees over or through surrounding trees, I've found a simple slingshot, some monofilament fishing line, a used fishing reel, and a collection of clasps and sinkers the simplest way to position your antenna. In this video, N0KTZ uses a 3.0 Magnum Slingshot and some commonly available fishing gear to launch an effective, simple portable antenna.  N0KTZ's chosen location is approximately 12,000 feet/3,658.5 meters above sea level and presents a stunning backdrop for a weekend of impromptu operating in the "field". The video is a well-pr