Posts

40 meter double bazooka build video.wmv. Post 1875.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=rWDU3S6goso. If you live in an urban neighborhood plagued by noise and other interference, you may want to build what is called a "double bazooka" antenna. The double bazooka antenna is an efficient, single band antenna which is very quiet and does not require a balun.  The antenna consists of coaxial cable, such as RG-58, or other 50 ohm type with the shield split at the center and the feed line attached to the open ends.  The antenna is broad banded, allowing full coverage of a single band without excessive SWR. In this video, Bill (WX4AR) takes us step-by-step through the design, construction, and testing phases of this of easy-to-build antenna. Why not build one for the upcoming ARRL Field Day?  You may be surprised how well this simple antenna performs in a noisy environment. For the latest Amateur/Ham Radio news and information, please

Six Meter Folded Dipole Antenna. Post 1874.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=qbje13U6hC4. This somewhat unusual video from Claude Jollet (VE2DPE) shows how to make a simple, inexpensive, and portable Six Meter Folded Dipole Antenna.  Although there is no voice track, the photos and text comments provide a good overview of the design, assembly, and testing phases of this antenna. According to Claude, the antenna elements "are made from ladder line, fed with ladder line and matched with a step down 4:1 coaxial balun at the bottom of the transmission line..."  The antenna is "cut to resonance at 50.4 MHz and the SWR is below 1:3 between 50.0 MHz and 51.0 MHz." Even though there is no vocal commentary, the photos and text should make construction of this antenna fairly easy. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. htt

Field Day Antenna Launching Demonstration. Post 1873.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=aCyyH0a_Cpk. Approximately 40,000 radio amateurs from the United States and Canada are expected to participated in the upcoming ARRL Field Day Emergency Communications Exercise.  The event occurs on the fourth-full weekend of June and is designed to test our emergency communications capabilities in the "field." One of the major challenges of Field Day is the selection and erection of antennas to cover the weekend of portable operations.  If your amateur radio club finds an area with plenty of tall trees, you may find these natural supports are perfect for your dipoles, inverted vees, slopers, and loops.  The problem, of course, is to get your antenna elements near the top of these trees with as little safety and engineering risk as possible. Your launch platform can be as simple as my homemade slingshot or as complex as the compressed air cannon

Home brewed 3 element yagi Antenna. Post 1872.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=PDmMhtIwykY. A wonderfully conceived, if somewhat flawed, idea for a 3-element VHF yagi antenna made from easily found objects around Marcial Grey's home.  Marcial does a good job of showing how he used some old aluminum tubing from a discarded television antenna, a bamboo stick, some inexpensive RG-58 coaxial cable, and a spare PL-259 to make this simple VHF yagi.  Marcial says he was able to access a repeater 25 miles/40.5 km from his home. The only weak spot in this video is the uneven quality of the video itself.  The idea is basically sound, and you should be able to get a lot of information from Marcial's effort. 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).

Deploying an Off Center Fed Dipole Antenna for Ham Radio. Post 1871.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=D4P5DdvsLys. In this video, we follow W5KV as he designs, assembles, erects, and uses an Off Center Fed Dipole for Ham Radio.  He discusses the materials, equipment, feed lines, and other tools necessary to make this popular HF antenna work efficiently. 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).