If you can't view this video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=IQVTnKQuKaM. This is post #1066 in a continuing series of "Simple Ham Radio Antennas."
The heart of this all band HF end fed halfwave antenna (160 meters to 6 meters) is the 9:1 unun transformer used to match the high impedance of the wire antenna to the low impedance of the HF transceiver. The 9:1 unun is made from 20 gauge wire wound on a torroidal coil. You can order the full unun through eBay under "nelson_antennas." The antenna can be configured as a vertical, sloper, or inverted vee. Adding a counterpoise system will improve efficiency and reduce ground losses.
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Aloha es 73 de Russ (KH6JRM)