If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=n5hKql_NGaQ This video from WizScience does an excellent job of explaining the theory, design, and operation of a counterpoise system for antennas. If you have rocky or high resistance soil in your neighborhood, a counterpoise may be necessary to provide a proper ground for your station. According to the video a counterpoise is "a network of suspended wires or cables used as a substitute for an earth connection in a radio antenna system...it is used with a radio transmitter or receiver when a normal earth ground cannot be use because of high soil resistance or other reasons." Try an elevated counterpoise system for your HF antenna. You may be surprised how much it improves the performance of your antenna. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org.