NVIS Antenna Resources

NVIS antennas have been a very popular topic among our members recently. A very interesting view of NVIS potential is found in the Hourly Area Predictions web page shared by ki4sgu. Use the pull-down menu under General Charts For Global HF and select Atlanta, then click the display button. The resulting color-coded chart indicates recommended frequency ranges for HF radio communication with the Atlanta area. It seems to conform fairly well with our morning QSO experiences on 75 and 40 m.

There are many published resources about the design and performance of NVIS antennas. Here are a few that we discussed recently on the air:

• The Cloud Warmer NVIS Beam - A nice article found by kb4xx.
  
• A Short Study of NVIS - A concise presentation of the design and performance. Includes antenna radiation patterns to show effects of various design choices.
  
• Some Notes on NVIS Antennas  - This is a link to several very detailed articles by L. B. Cebik. A free web account provides access to a treasure trove of antenna articles by this author.

We look forward to additional reports from members who are experimenting with these antenna designs.