The following chart presents the results of impedance measurements made on a variety of common-mode choke implementations across the frequency range 1MHz to 30MHz. Amateur frequency allocations are indicated approximately by the vertical grey bands. http://www.karinya.net/g3txq/chokes/
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Single-Band Dipoles – ARRL
You can enjoy Amateur Radio on the HF bands with nothing more than a copper wire strung between two trees. This is the classic dipole antenna. It comes in several varieties, but they all function in essentially the same way. Single-band dipoles are among the easiest antennas to build. All Read More …