Tuesday, June 25, 2019

Near Vertical incidence Skywave Propagation NVIS Antennas - Ham Radio Q&A. Post 1909.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=fvZ7z-6wAy0.

If you need a simple, efficient HF antenna for local, regional, and state coverage, why not build a NVIS (near vertical incidence skywave) antenna?  These antennas are designed to put out a strong signal covering 100 to 300 miles/162 to 486 kilometers from your station.  Such antennas can serve as valuable backups to regular VHF/UHF coverage, especially when repeaters are down.

In this video, Michael Martens (KB9VBR) show us how to build a simple NVIS antenna.  These antennas are perfect for local nets and regional coverage.  Although there is no "fast and sure" rule for how much the antenna should be above ground, I've found a 40 meter dipole about 15-feet/4.57 meters above ground and an 80 meter dipole about 31-feet/9.45 meters above ground will generate a good signal for about 300 miles/162 kilometers on most days. 

Michael does a good job of taking us through the building, tuning, and on-air operations of this useful antenna.  Why not make one of these antennas for your "go-kit" or for your next portable operation?

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://bigislandarrlnews.com.
https://oahuarrlnews.wordpress.com.
https://hamradiohawaii.wordpress.com.
https://www.eham.net.
http://www.southgatearc.org.

Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

No comments:

Post a Comment

Thank you for visiting my Amateur Radio Blog. I value your comments and suggestions. For Amateur Radio Antenna Topics and Discussions, stay here. For Amateur Radio News and Trends, please visit my news site at https://bigislandarrlnews.com.
Aloha es 73 de Russ (KH6JRM).