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HF random wire antennas can work very well as portable or emergency antennas if you pay attention to some of their limitations. In this video, WD0AKX experiments with a random length antenna in his back yard. Coupled with the internal antenna "tuner" of his Elecraft KX3 and a simple ground radial system, he found the easily made wire antenna produced several good contacts. WD0AKX supplies a few helpful links, including one which suggests workable antenna lengths for random wires (http://udel.edu/~mm/ham/randomWire/).
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