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The Alfa AWUS036NHA uses the Atheros AR9271 chipset and does not support Linux directly. There is an open source driver available for Linux use.

http://linuxwireless.org/en/users/Drivers/ath

Please note we post this link as an informational resource only and are not currently able to provide support for this open source information or for installing or using AWUS036NHA in Linux.

Update 10/31: Alfa Network, Inc, has posted this useful how-to on their blog.

Need help deciding which Wi-Fi adapter to get? We make it easy with our new feature that ranks indoor Alfa Network Wi-Fi USB adapters by both range and speed. When you are buying an Alfa adapter, you really can't go wrong either way as all Alfa models get good range and speed. But our new rankings show you the ones that get the best overall range and the best overall speed so you can decide which will be the best for your needs.

Our range rankings were created based on a test of which adapter could see the most networks in total. Our speed rankings were created first based on which adapter had the fastest overall connection speed to the router. For those adapters that had the same maximum connection speed, we sorted those based on which had the fastest overall throughput speed to our ISP based on a throughput test. Because this can vary based on ISP and router model, we also averaged in feedback from customers about which model had the fastest througput.

We did not include outdoor models from Alfa, these rankings are just for indoor models.

Now in stock at Rokland- the Alfa AWUS036NHA, a high speed Wi-Fi USB adapter featuring the Atheros AR9271 chipset with Atheros Align® technology. AWUS036NHA offers better true throughput to your ISP compared to other Wi-Fi USB adapters. It is perfect for video streaming, large downloads, and online gaming.

More from the manufacturer:

"Atheros Align® technology leverages the 802.11n 1–stream specification to provide the optimal upgrade path from legacy 802.11 solutions. The single-stream feature enables a new class of Wi-Fi devices that deliver performance enhancements over the existing 802.11g technology, at comparable price points. Align® solutions are forward compatible to higher-performance, multi-stream, MIMO–based 802.11n, and are available in reference designs to serve the networking, PC and consumer electronics markets. The enhanced throughput of Align 1–stream solutions improves network efficiency by occupying the wireless channel for shorter periods than slower 11g devices – reducing congestion and increasing capacity for additional wireless devices."

Alfa AWUS036NHA is now in stock and available for immediate shipment. It comes with a 5 dBi gain external antenna, USB cable, and driver CD. It is compatible with Windows XP, Vista, and Windows 7.