One of the first antennas I built was the W5GI mystery antenna, it makes an excellent antenna as a starter project when first entering the hobby.
The Mystery antenna
covers 80 to 6
meters with low feed point impedance and will work with most radios, with or
without an antenna tuner. It is approximately 100 feet long, can handle the
legal limit, and is easy and inexpensive to build. It’s similar to a G5RV but a
much better performer especially on 20 meters.
The W5GI Mystery antenna, erected
at various heights and configurations, is currently being used by thousands of
amateurs throughout the world. Feedback from users indicates that the antenna
has met or exceeded all performance criteria. The “mystery” part of the antenna comes from
the fact that it is difficult, if not impossible, to model and explain why the
antenna works as well as it does. The antenna is especially well suited to hams
who are unable to erect towers and rotating arrays. All that’s needed is two
vertical supports (trees work well) about 130 feet apart to permit installation
of wire antennas at about 25 feet above ground.
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