The EFHW-8010 is a 130 foot end feed antenna with a 9 to 1 Balun. It is available with a 1KW or 2KW rated balun. Standard wire is 18 gauge with 14 gauge being an option. Highest SWR is 2 to 1 on 80 meters with 1.5 average on other bands including the WARC bands. Add 20 feet in length and 80 meters drops to 1.5 to 1 SWR and does not effect the other bands. This antenna has a low enough SWR that a tube type HF amplifier does not require an antenna tuner. 1KW & higher power antenna tuners costs more than the EFHW-8010 antenna. I also found the antenna produces low noise on the bands and puts out a strong signal with only 20 feet installation off of the ground. Higher is better like any antenna. I do not know of any other better performing long wire antenna. You can buy towers and beam antennas, but this simple EFHW-8010 performs and using an amplifier will place a large signal on the ham bands with less cost vs towers, rotors and beam antennas.