NVIS antenna are good for Short range HF communications. For Hawaii, NVIS antenna will most likely work better for inter-island communications.

Have you ever passed a military vehicle with an antenna tied down, that is a NVIS antenna. The military uses NVIS antennas for out to about 500 miles.

HUMMV NVIS

NVIS has a high take off angle and goes up high and comes back down. A long distance antenna will have a lower take off angle for greater distances. NVIS works better for 40 (day Time) and 80 meters (Night Time).

It works best if both parties talking has a NVIS antenna. You just need around 15 feet height.

NVIS 1 AntennaNVIS 2

Advertisements