University of Hawaii 40M NVIS Antenna
This work was done by Mike W. Burger AH7R and is on the University of Hawaii webstie. Mike stated that "we in Hawaii need NVI desperately as our islands are spaced just wrong. Too far for VHF in most cases and too close for HF first skip, even at E layer". So he produced this excellent work on 40 meter NVIS antennas.