I use the 1 kHz filter most of the time and the 400 for as needed, for contesting. In the 10m contest, I used the 1 kHz filter 90% of the time with the DSP set to 500-600 Hz. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Cw-Filter-Choices-tp7097626p7100756.html Sent from the Elecraft mailing list archive at Nabble.com.