I got three different WIFI antennas on Ebay. A directional 14 element Yagi with 20dbi gain (so they say), a omnidirectional with 15dbi gain and a magmount (weak magnet) with 20dbi gain. Each was less than $8. Carl must have at least a 25dbi gain with 18 elements. Now I am anticipating a bidirectional amp at least 2W's. They go for $25 to $60. Several guys in the local ham club are playing with mesh net
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