OpenTube

Understanding NVIS

Rohde & Schwarz

70,801 views

This video explains the fundamental principles of near vertical incidence skywave (NVIS) propagation, including the importance of incidence angle, frequency, and common antenna types.

Understanding HF Propagation: Understanding HF Propagation

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Index:
0:36 Review of skywave propagation
1:30 Skip zones
2:14 NVIS overview
3:20 Practical advantages of NVIS
4:25 Operational advantages of NVIS
5:50 NVIS disadvantages
6:33 NVIS frequencies
7:52 NVIS antenna overview
8:55 Elevation and azimuth patterns
11:12 Common NVIS antenna types
15:03 Mobile NVIS antennas
16:46 Skywave vs. Groundwave
17:41 Summary

20 Comments

@Luzt. 8 months ago

Exemplary learning material. Speakers diction, sound, pictures, structure of knowledeg presented - everything top notch. I feel like I'm back in the 80's.

@VE3IPS 4 years ago

Thanks for the clear and concise explanation of NVIS Propagation theory. The minimal effects from getting jammed is great for the army and the consistent signal quality without fading is useful for digital modes. I have made a lot of contacts on NVIS. Just remember the antenna at 30 ft height brought down to 12 ft height will need shorting to get the swr down. Feel free to make a specific 60m NVIS antenna for example so you can rapidly deploy it without worry 73s VE3IPS

@Betukibaatein 4 years ago

I really admired the detailed presentation . thank you so much for this video .

@DoronTurkel 3 years ago

Anyone who is seriously interested in NVIS will benefit from this introduction to the concepts covered. The information is articulated and illustrated clearly.

@BryanWicks 3 years ago

Once again, a great presentation, this time featuring NVIS propagation and the elements behind the theory. It is only recently that I discovered your channel and have walked away wiser from the quality of your content.

This is going to go a long way in helping me construct DIY antennas that will facilitate regional HF communications with known contacts. Shouting out to @TheTechPrepper for illuminating my interest in NVIS, and thank you for the upload!

@drdarwin1 2 years ago

Thank you for the clean and concise information

@buckbrown823 5 years ago

Excellent presentation by obvious professionals that can be understood by amateurs.

@MuratJoachim 3 months ago

Outstanding presentation. Many thanks.

@schweinhund7966 1 year ago

Outstanding video class. I like ultra long range but it is good to learn about other antennas. Earned a like and subscription!

@CoaxDog 4 years ago

This is an excellent presentation on NVIS. Well done.

@adelarsen9776 4 years ago

Thank you Paul for this refresher. 7 3 de VK4SOE.

@EI6DP 2 years ago

Brilliant. I would love to see a video on the T2FD which I use.

@PiratePTG 5 years ago

Excellent presentation! I am starting to experiment with NVIS and this has been one of the most well done and informative pieces I have found. Thanks for your time and effort! 73 de KC4YDY

@raymondpeterson5748 1 year ago

Thanks. This really cleared up a lot.

@Climb1Maintain 3 years ago

Nice introduction!! Thanks you !

@milton.bolanos 6 years ago (edited)

Very Interesting Tutorial of basics in Propagation

@Don008Ramon 2 years ago

Thank you that was great !

@garyoliver8183 5 years ago

Excellent presentation...well presented! Thanks.

@yidegyismaw6724 5 years ago

It is so interesting

@faithfulfeedback 4 years ago

I have successfully deployed 2 of these in the field. The performance is truly amazing, I am using a 1:1 and 1:9 baluns and SWR is low on several bands. I highly recommend this in mountain terrain