My old adapter is the AWUS036H http://www.alfa.com.tw/products_show.php?pc=34&ps=92
I just bought a AWUS036NEH from the hakshop http://www.alfa.com.tw/products_show.php?pc=34&ps=22
The issue is that the newer adapter performs poorer than the old one. I would have thought it would be better? The below picture is when I switch adapters, you can see the RSSI gets worse.