End-Fed Horizontal Wire antennas (or EFHWs) cover multiple bands without traps, stubs, or resonators. End-fed wires resonate on their 1/2-wave fundamental frequency plus all odd and even harmonics above. By adding a broad-band matching network, the wire's high impedance feed point is transformed down to 50 ohms across a wide frequency range and, in most cases, you won't need a tuner to operate. Note that the single-wire radiator may be installed using only one high center or end support, making it fast and easy to set up at home, on the road, or as a "grab-and-go" emergency antenna.
ModelMFJ-1982HP handles 800-watts PEP, 80-10 meters and 10 meters. The MFJ-1982 resonates slightly above the 30-meter band, so a tuner is normally needed for transmitting. Also, note that there is small 6-turn inductor wound into the antenna wire about 6-feet from the matching unit.