Posts

Ultimate Bugout Bag Radio. Post #1482.

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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=SDYSF5KAA8M. In this video, Julian (OH8STN) discusses the ultimate survival communications radio, the features it has, what makes it so useful, and how it can provide reliable contact when you're out in the field. In Julian's view, the "ultimate survival radio" must be low cost, multi-band capable, low weight, sturdy, and battery-powered.  Julian uses the popular Yaesu FT-817 series of transceivers to illustrate his point.  He also refers to several portable antennas that can be used in field or emergency operations.  Overall, this video is an excellent introduction to survival communications. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://hamradiohawaii.wordpress.com. http

Roll Up Slim Jim Antenna for Emergency & Preparedness. Post #1481.

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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=196-sS2yYak. If you need an efficient, easy to use portable 2 m/70 cm antenna for field or emergency use, please consider the "Slim Jim" VHF/UHF antenna from Nelson Antennas.  In this video, Coach Helder (W2NTC) discusses the indoor and outdoor use of this antenna for emergency and preparedness communications.  Testing was done with a Yaesu VX-8DR transceiver. Of course, you could always build your own version of this versatile antenna.  But, if you want to have a ready-made 2 m/70 cm antenna that works right out of the box, then consider the antenna described in this video.  It certainly doesn't hurt to have a spare antenna in your shack or vehicle. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday

Ham Radio HF/VHF Antenna Lengths Chart. Post #1480.

Ham Radio HF/VHF Antenna Lengths Chart. Post #1480. http://www.hamuniverse.com/hamantennalengths.html. Author:  N4UJW (http://www.hamuniverse.com. Accessed on 03 May 2018, 0436 UTC, Post #1480. Please click link to read the full article. Comment: N4UJW from http://www.hamuniverse.com has created a handy, useful, and easy-to-understand chart for those building their own HF and VHF antennas.  You can use this chart to determine the lengths of 1/4 wave verticals, 1/2 wave dipoles, and full wavelength loop antennas.  Antenna calculations are based on the general formula 468/F(MHz)=Length in feet.  Loop antennas follow the general formula1005/F(MHz)=Length in feet.  Copy this chart and file it with your antenna documents. For the latest Amateur/Ham Radio news and information, please visit these web sites: http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). http://www.southgatearc.org. https://www.eham.net.

40 Meter Inverted V Antenna-Build, Tune & Test. Post #1479.

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If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=tbq1UgwM_go. What started out as a "snow day" project for Barbara Justice and her children ended up as a 40 meter/20 meter fan dipole configured as an inverted V antenna.  Barbara says a few modifications also allowed her to use the antenna on 40-20-15-10 and 6 meters.  Despite the antennas low height above ground, the overall results of this winter activity produced a useful, multiband HF antenna at a modest cost. The video takes you-step-by-step through the building, configuration, and use of this versatile antenna.  The assembly process is organized, efficient, and simple.  Just follow the instructions and you'll have an efficient multiband HF antenna in just a few hours. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which

KC9OLF ARRL Field Day Antenna Build. Post #1478.

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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=KswsesN79e8. This video from "campindave1" show the step-by-step process of designing, building, and operating a multi-band HF dipole for the 2013 ARRL Field Day.  Members of the Owatonna Steel County Amateur Radio Club take you from the basic materials to the finished product in a few short minutes.  Simple, easy-to-build HF dipole antennas can perform very well if they are at least 1/2 wavelength above ground.  This video does a good job of showing the actual building process. For the latest Amateur/Ham Radio news and information, please visit these sites: http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://amateurradionewsinformation.com (Amateur Radio News & Information). http://www.southgatea

Simple Multi-Band Vertical Dipole. Post #1477.

Simple Multi-Band Vertical Dipole. http://qrznow.com/simple-multi-band-vertical-dipole-by-dj0ip/ Author:  DJ0IP. Accessed on 30 April 2018, 0005 UTC, Post #1477. Please click link or insert title URL into your browser search box. Comment: If you have a limited area to erect a multi-band HF Dipole Antenna, you may want to consider this vertical HF dipole antenna from DJ0IP. The illustration provided by DJ0IP provides all of the information you need to design, build, and operate this simple, elegant design. Here's the list of  basic materials for this antenna: A telescoping fiberglass antenna mast 12 meters/39.36 ft long.  DJ0IP uses a Spider Beam fiberglass pole to support the antenna. 6 meters/19.68 ft of wire for each antenna element for a total of 12 meters/39.36 feet. A homemade antenna center insulator.  Each antenna element is wrapped in a loose spiral for each half of the fiberglass pole. A convenient length of 450 ohm open wire feed line. A balanc

N9SAB Half Square Antenna-Field Test. Post #1476.

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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=_JR9v0YeI. Excellently presented test of N9SAB's 20 meter Half Square Antenna by "Outdoors On The Air."  While the half square antenna is a bit more complex than a simple random wire or dipole, it does show some gain (around 3dB) broadside over a dipole antenna.  In this video, "Outdoors On The Air" assembles, erects, and uses a half square antenna built by N9SAB, and shows the DX capability of this phased vertical array despite being only 20 feet/6.097 meters above ground. While the antenna can be erected by yourself, you may need some help to make sure the antenna elements are properly supported and aligned.  Although the half square can be used in portable operations, it may be best suited for a permanent installation. Over the past several years, the Big Island Amateur Radio Club (Hawaii Island) has used half square antennas fo