One of the best all-around HF antennas is the multi-band doublet. The antenna is simple, inexpensive, and covers several HF bands with the aid of a parallel feed line and a balanced antenna "tuner."
In this well-made video, Kevin Loughin (KB9RLW) presents a two-part series on the theory, design, construction, and use of this versatile antenna.
Here are some of Kevin's remarks:
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