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One of my favorite online video programs is "Ham Nation." The 1.5 hour program covers a variety of Amateur/Ham Radio-related topics, including news, propagation, antennas, DX contests, and technical questions.
In program 428, we get an excellent tutorial on "How To Moonbounce"--something that can be done with modest equipment and homebrewed antennas. The discussion is clearly presented and is easily followed.
Here are some of the other topics covered in this program: