Posts

Review of Pracomm SML-1000-1 Loop Antenna (#95). Post #1637.

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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=S6hh93WKCG8. If you live in an antenna-restricted home, apartment, or condo, then a magnetic loop antenna may be a way of getting on the air without yourself visible to neighbors.  In this video, Dave Casler (KE0OG) reviews the Pracomm SML-1000-1 Loop Antenna. Dave does a good job of explaining the theory and design behind this loop antenna, which shares some features of more expensive magnetic loop antennas from MFJ and other manufactures.  If you're interesting in this antenna, please contact Roberto Arranaga (KX4CY) at http://www.pracomm.store. 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://oahuarrlnews.wordpress.com.

These Spray-on antennas could be the future of communications. Post #1636.

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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=QHiQyyLaBFQ. Here's a fascinating antenna article from Drexel University which describes the use of sprayed-on antennas for medical, industrial, and communications applications.  Such technology could prove useful for radio amateurs and first responders as they try to reestablish communications damaged by natural or human-made disasters.  Imagine going to your ARRL Field Day site and spraying your antenna to a wooden wall, tree, or picnic table.  Perhaps the "antenna in a can" will become reality sooner than you think. 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://bigislandarr

Making open wire feedline. Post #1635.

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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=yrREQyMI7RI. Australian radio amateur Peter Parker (VK3YE) offers another excellent, concise antenna video for hams.  In this video, Peter shows us how to make an open wire feedline for HF antennas.  According to Peter, "open wire feedline is a cheap and low-loss feedline ideal for feeding dipoles."  Open wire feedline  "tolerates significant impedance mismatches without much loss and in conjunction with a balanced antenna coupler allows multiband operations on a single dipole." Peter offers valuable suggestions on how to build and use this type of feedline. 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://hamr

Homebrew 2M Moxon antenna project. Post #1634.

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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=OEWb_H2m5k4. Do you need a simple, easily-built, and highly portable  2 meter antenna for field or emergency work?  Then, a basic Moxon Antenna is what you need.  In this video, Paul Athersmith shows us how to design, build, and use a 2 meter Moxon for dependable local or regional use.  The antenna is lightweight and can be made from locally available materials.  Why not spend some time this weekend making this effective and beautiful 2 meter antenna?  If this antenna proves useful, you can always scale the basic design for any amateur/ham radio band of your choice.  I onced use a Moxon design for a 10 meter antenna and got excellent results.  Of course, that was a few years ago when propagation was better than it is now.  The Moxon is an excellent choice for VHF/UHF service. For the latest Amateur/Ham Radio news and information, please visit these websit

Dipole antenna for hf (home made!). Post #1633.

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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=QZ-mA6Fn0HA. Here's another attempt to design, build, and use an indoor antenna where outside antennas are not permitted.  M6STL made this 20 meter hf antenna from 5 meters/16.4 feet of RG-8X coaxial cable.  It isn't clear if the antenna is receive only.  Apparently, the antenna is usable in his location.  If you're in an experimental mood, make an indoor hf antenna and see what results you get.  A compromise antenna is better than no antenna. 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