Linux users can install quisk-lppan-k3. It's a far simpler user interface than the PowerSDR software. We're hoping to port it to Windows as well some day. It can control the K3 directly, or work through fldigi, which is a digimode program that itself runs on Windows, Mac, and Linux. http://wa5znu.org/2009/04/quisk-lppan-k3/ Leigh/WA5ZNU