Line of site helps. There is an internet story of an Aussie who built a pringles can one but he jacked it up with a few more pringles. On his ranch or something he got 10 kilometers while aiming.<br><br>
Not so many years ago, we connected two tin cans with a long piece of string, pulled it tight, and would take turns saying, "hello? Can you hear this?" It was exciting when you actually could hear someone talking this way. <br><br>Now it seems we're doing it again; this time without the string, or rather, with an electromagnetic string. <br><br>Hello? Getting signal yet?<br><br><br>Shooshie<br><br>Shooshie's Stuff
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