The W5UN 6 band quad shown in photos above has only 2 elements. It was designed and extensively modeled with the help of K6STI's AO modeling software. Antenna gain is nominally 5 dbd on all bands, with a typical 20 db front to back ratio. No loop feedpoint matching is required, as the antenna was designed specifically to keep vswr to 1.5 or less on all bands without matching. I found that it was possible to do this without compromising either gain or f/b ratio. In fact, very little compromise of antenna performance occurs on any band when compared to an optimal single band 2 element quad. Current baluns are used at each loop's feedpoint to preserve the quad's radiation pattern. The height of the quad's boom is 65 feet above ground. This was determined to be the optimal height for typical arriving dx signal reception angle on each of the 6 bands. The quad is mounted in the + configuration to allow coax cables for each band to be run along the vertical fiberglass mounting arm and attached to the appropriate band loop at its upper corner. This construction method was determined to be the most mechanically secure, and helps keep water from flowing and entering connectors or baluns (an important lesson learned from many years of 2 meter eme array experience). The antenna was tested by strong winds (60 mph) one week after installation and survived nicely. A 6 band coax selector switch is mounted on the 3" quad boom, with control cable running to the shack. I built a band decoder selector circuit for my FT1000D transceiver, allowing me to instentaneous switch the antenna for a new band by merely changing frequency on the FT1000D. My 160, 80, and 4 element 40 meter beam antennas are also incorporated into this switching scheme.