Even tunes all MARS and CAP HF frequencies. The antenna is built with a motor driven center loading coil. The coil slides up and down inside a copper tube as you move up and down in frequency. Top whip may be any length you choose. When using a 63 inch whip, the antenna will work on ten meters as a quarter wave vertical antenna and as a loaded vertical on all the other bands.
Many users choose to operate with a longer whip to increase their signal on the lower bands.
Users report excellent results with the antenna mounted on small steel buildings in mobile home parks. Truckers report excellent results using a 90 to 100 inch wire coming from the top of the antenna and tied back. The loading coil is designed with Hi-Q making it extremely efficient. The coil wire is hard drawn and will not become loose in operation. The motor which raises and lowers the coil is mounted inside the copper tubing.