Cruising Sailors Forum Archive
Engenius EUB 9603H is another good one. 
In Response To: Alfa on ebay cost $ 40 some odd bucks and works great! 
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() N class High power USB adapter, about the same price as the Alfa on Amazon.com. http://www.amazon.com/EnGenius-EUB9603H-600MW-USB-Adapter/dp/B003E8J998/ref=sr_1_1?ie=UTF8&qid=1288714083&sr=8-1 . I prefer it to the Alfa (unless you have a Mac), but both are excellent buys.
