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A comment on The Size of the Human Radio-Broadcast Bubble in the Milky Way Galaxy. Parent comment

Re:The Size of the Human Radio-Broadcast Bubble in the Milky... by ANH on Sunday February 06, 2011 @12:41PM (#2186007)
In addition to line-of-sight, your AM station is transmitting more or less omnidirectionally. Significant gains (pun intended) can be had by narrowing your beam. Check out the Link Budget Equation: http://en.wikipedia.org/wiki/Link_budget
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