Posts

MicroVert 40M antenna - home made. Post 1728.

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https://www.youtube.com/watch?v=gpRv6LqKlbw If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=gpRv6LqKlbw Thanks to OM0ET for this fascinating video.  Here's a simple, low cost, and easy to build vertical antenna suitable for both home use and portable operations. The MicroVert is based on a design developed by Jurgen Schafer (DL7PE).  As built, the MicroVert is a short, base-loaded antenna that uses the coax shield as a counterpoise.  While the Microvert doesn't perform as well as a dipole antenna, it can get you on the air where large antennas are not suitable or allowed. A MicroVert calculator can be found here:  https://lowreal.net/2013/microvert/. 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://oahuarrlnew

20m Indoor Antenna. Post 1727.

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20m Indoor Antenna If you can't see the video, please insert this URL tile into your browser search box: https://www.youtube.com/watch?v=PfW3u9YJuhM. Here's an ultra simple 20 meter vertical antenna that can get you on the air without violating the deed-restrictions of HOAs and CC&Rs.  The antenna consists of a wire, a simple counterpoise, a telescoping fiberglass fishing rod, and a clamp.  According to the maker of this antenna, results with a qrp rig (such as a Yaesu 817) were excellent.  This antenna could also be mounted on the railing enclosing your patio for better performance.  A nice, easy antenna solution for those who can't erect outdoor antennas because of space or deed restrictions. 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.

Ep. #355 Homemade 20 Meter Ham Radio Antenna. Post 1726.

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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=bSCsy0kD4J4. As this video shows, you don't have to spend a lot of money to build a simple, effective antenna for the 20 meter band.  This radio amateur and his father worked together to design, build, install, and use a basic antenna made from locally available resources for  access to the popular 20 meter ham band.  Similar construction techniques can be used for any HF amateur radio band.  This antenna is suitable for both home and portable operations.  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

Magnetic loop antenna for 160-40 meters 1KW. Post 1728.

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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=VOKsCRaRcqg. Here's a nice antenna project for those radio amateurs living in deed restricted properties (HOAs/CC&Rs).  Woody (N4MQ) takes us step-by-step through the design, construction, adjustment, and use of this magnetic loop antenna that covers all amateur/ham radio bands from 160 meters to 40 meters.  The heart of the antenna system is a pair of 45,000 volt vacuum capacitors tuning a 12-foot/3.658 meters diameter loop, showing construction of the capacitor tuning cabinet.  Be careful with this project.  Potentially lethal voltages are involved. 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.

Random Wire Antenna Essentials. Post 1724.

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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=NWuYgRyWlmE A properly designed and installed random wire antenna can deliver excellent performance.  In this video, Stan Gibilisco (W1GV) discusses some important things to remember when you design, build, install, and adjust an end-fed random length wire antenna.  A good review for any radio amateur. 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).

Building a 1 foot junk box magnetic loop final design and on-air test. Post 1723.

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If you can't see the video, please enter this title URL into your browser search box: https://www.youtube.com/watch?v=ZTsYRyEkCkQ Here's part two of Kevin Loughin's (KB9RLW) mini magnetic loop antenna.  In part one, we did some preliminary design work and began basic construction.  In part 2, Kevin finalizes his design and begins on-air testing.  Does this small loop antenna really work?  Here's Kevin's answer: "After much experimentation I'm finally done with the mini magnetic loop. Built from scrounged junk in my basement, it works surprisingly well. I've made many contacts on it, and using WSPR, it's covered the US with half a watt. Video of the original build here: https://www.youtube.com/watch?v=b9KSD... Video of the custom HV trimmer cap I made for this loop here: https://www.youtube.com/watch?v=PZt7V... And finally, a video of my build of a simple field strength meter I use while testing the loop: https://www.youtube.com/

Ham Radio-Building a 1 foot Junk Box Magnetic Loop (experimental). Post 1822.

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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=b9KSDvjycyw What once looked like a "boring evening" for Kevin Loughin (KB9RLW) turned out to be most productive in terms of building a new experimental HF magnetic loop antenna.  Kevin wondered if a very small (1-foot/0.3048 meter) magnetic loop could deliver enough performance to qualify as a useful antenna.  Although Kevin admits that the loop wasn't very efficient, it did work and served as a model for a much improved loop antenna later on. Kevin featured that antenna in this youtube video:  https://www.youtube.com/watch?v=ZtsYRyEkCkQ.  The message from this little project is clear:  don't be afraid to experiment with your antennas.  You may succeed beyond expectations.  Besides, antennas are fun to build, especially when you spend very little money to make them.  For the latest Amateur/Ham Radio news and information, please visit the