Posts

An ATU for end fed aerials. Post #1514.

Image
If you can't see the video, please insert this title URL into your browser search box://https://www.youtube.com/watch?v=o43sAF4HwJs. Here's another expertly done video tutorial from Ray of the UK-based "Radio Workshop."  In this video, Ray show us how to build a simple, inexpensive L-match ATU (Antenna Tuning Unit) for the HF shortwave and Amateur Radio bands.  The ATU can be used with end fed "aerials", including inverted L antennas.  A definite must have accessory for radio amateurs using random length or inverted L antennas.  Don't forget to connect your antenna system to a good radial or counterpoise 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://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://amateurradionewsinformation

Cheap and easy to build 2 meter antennas. Post #1513.

Cheap and easy to build 2 meter antennas. Post #1513. http://www.hamuniverse.com/2mtrcheap.html. Accessed on 05 June 2018, 0035 UTC, Post #1513. Author:  Don (N4UJM). Please click link to view the complete article. Comment: Do you need a cheap, easily assembled, mostly "stealthy", and completely portable 2 meter antenna? If you do, then this article from Don (N4UJM) is worth reading. In his post, Don describes 3 simple 2 meter antennas that can be made from locally available materials: The ultra simple "wire" version that can be suspended from a convenient support.  This antenna can be used indoors or outdoors. A table top 2 meter antenna using a dowel or other simple, weighted support. And a simple beam or yagi antenna incorporating the above designs.  Don also offers some construction and operating tips for these antennas. -------------------------- For the latest Amateur/Ham Radio news and information, please visit these websites: http

Building a Multi-Band Dipole. Post #1512.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=cQfj9879K_c. Here's an ultra simple, inexpensive dipole antenna that you can build in a few hours.  Using locally available materials, Bob Plank (KK4DIV) shows us how to design, build, and use a dipole antenna which covers the 40,20, 17, 15, and 10 meter Amateur Radio bands.  Calculators for element lengths can be found online.  Bob used an antenna design program he downloaded from http://hamuniverse.com.  For a bit more flexibility, you may want to substitute 450 ohm ladder line for Bob's coaxial cable feed.  By using ladder line and an antenna transmatch (i.e. "tuner") coupled with a 1:1 or 1:4 current balun, you can get coverage from 80 though 10 meters. 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 p

Tuning the 40/80 meter Inverted V Dipole Antenna, Post #1511.

Image
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=IKuLDnwuy8M. Inverted V Dipole Antennas are simple, inexpensive, portable, and capable of multiband operations using a variety of options.  In this video, Dave Tadlock (KG0ZZ) uses homebrew coils to convert his inverted V antenna into a dual-band, 40/80 meter antenna.  The video offers valuable suggestions on adjusting the loading coils for optimum efficiency on both 40 and 80 meters.  This coil-loaded 40/80 meter inverted V would make an excellent HF antenna for the upcoming ARRL Field Day, especially now that propagation is favoring 160, 80, and 40 meters. 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://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com.

Wire Antennas for Dummies by Callum, M0MCX. Post #1510.

Image
If you can't view the video, please insert this URL into your browser search box: https://www.youtube.com/watch?v=I1_H-4dw31Q. A short, well organized, and easy to understand presentation discussing dipoles, loops, and vertical antennas that match 50 ohm feed lines.  Callum (M0MCX) does a masterful job of explaining what happens when we change the height and shape of basic wire antennas.  This video was adapted from a club presentation designed  to encourage a deeper understanding of how antennas work. 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://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://amateurradionewsinformation.com (Amateur Radio News & Information). Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).