This is an End-Fed Half Wave (EFHW*) antenna for 40/20/15 and 10m bands. Unlike many END FED antennas on the market this one does not require the Antenna Tuner to operate. It is a resonant Half wave on 40m (7MHz) therefore also resonant on second, third and fourth harmonics, 20m (14MHz), 15m (21MHz) and 10m (28MHz). The antenna could be used with 100W on WARC bands too, were measured VSWR is less than 4:1. Due High Impedance feed point, antenna is less height dependent. You can put it up at 10 or 50 feet in the air without much change in VSWR values.
Various installations such as horizontal, vertical, as inverted V, as inverted L, zigzag etc. are possible. Measured VSWR in the gallery are taken with the antenna in inverted V shape with the center of wire at 20 feet and ends at few feet above ground, your values could vary with way and height of installation.
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