Posts

Tilted Terminated Folded Dipole Antenna. Post #1632.

Image
If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=Batw43uoQ9I. Here's a nicely-done video on how to design, build, and use a Tilted Terminated Dipole Antenna.  The video describes a T2FD antenna project from design to installation featuring a 10w terminating resistor made from 4 X 5w 390 ohm resistors in a series-parallel configuration and enclosed in a balun/resistor assembly for structural integrity.  In days past, B & W made several variations of this antenna for the Department of Defense and other U.S. Government agencies. 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.

RV Antennas for Amateur Radio. Post #1631.

Image
If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=mJ-wIggomYQ. If own a mobile home or a recreational vehicle (RV), then you know how vital communications can be.  Why not provide an extra margin of safety and enjoyment by installing an amateur radio station in your RV or other vacation vehicle?  In this well-produced video from Reese Peter Griffin (DDS), we see several ways to mount both HF and VHF/UHF amateur radio antennas.  Each installation is simple, effective, and relatively cheap.  Of particular note is the "mast-to-ladder" method which allows rapid deployment of both HF and VHF/UHF antennas. 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.wordpre

Counterpoise/Rat Tail for Ham Radio. Post #1630.

Image
If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=nYVNxKzld-g Adding a short "rat tail" or counterpoise wire to your hand held VHF/UHF transceiver can boost the range of your radio, reduce the swr a bit, and lead to clearer communications.  The "rat tail" becomes the missing half of the radio's vertical antenna.  This video shows you a simple way of making and attaching the "rat tail" to your transceiver.  A  basic, simple way to increase the coverage of your VHF/UHF transceiver. 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

HF mobile antenna new project. Post #1629.

Image
If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=YShh25VYb3c> Here's an excellent example of how to make a durable and efficient HF mobile antenna from CT1JRZ.  The keys to his success are a well-designed and built coil and an effective grounding system for his vehicle equipment.  This antenna could also be used on an urban lot where space is at a premium.  A nicely done antenna project! 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).

The W8JK Antenna. Post #1628.

The W8JK Antenna. Post #1628. http://qrznow.com/the-w8jk-is-a-famous-and-effective-dx-antenna/ Author:  ZR6TXA. Please click link to read the full article. Comment:  It's alway fun to build and try a classic antenna.  Such is the case with the W8JK beam antenna, originally designed, built, and used by John Krauss in 1937.  Krauss updated his ground breaking design in the June 1982 issue of "QST", published by the ARRL. In this post, ZR6TXA takes us step-by-step through the design, construction, and use of this simple, effective beam antenna.  Simply stated, the W8JK antenna consists of 2 closely-spaced parallel dipoles driven with opposite phase.  Properly designed, the W8JK can cover 20 meters through 10 meters with elements only 7.3 meters/23.94 ft long.  According to ZR6TXA, optimum element spacing is around 2.6 meters/8.52 feet. The article contains helpful drawings, photos, and suggestions for the novice antenna experimenter.  Why not built and use a &