18HT HyGain Hytower Analysis
The 18HT Hytower in my opinion is one of the most versatile vertical antennas available for amateur use. It can be made to operate 160 through 10 meters. However, my experience is only 160 through 20 meters. My hytowers have survived many storms. The hytower is nearly full-size on 80 m; full-size on 40 m; and operates as a 3/4 wave vertical on 20 m. Figure 1 shows a screen dump of my model for the hytower and figure 2 shows 80/40/20 meter elevation patterns.