The physical length of an 80 meter 1/4 wave wire is approximately 66 feet, depending on what part of the band it is being cut to. To make this physically shorter, while keeping it electrically a 1/4 wave length, we add inductance to the wire. As mentioned above, this antenna is shortened to only 2/3 the length of a full vertical dipole. This was the maximum height I could live with. As I mentioned earlier, more shortening will not compromise gain or wave angle much at all, but it will reduce the bandwidth. For this 2/3 antenna, the bandwidth is still very reasonable, though, Figure 7.