Sam, You "tell falsehoods" to the K3 when you configure the filter. If it thinks a 250 Hz filter is actually a 400 Hz width, it will switch in at that point. 73, Don W3FPR On 10/3/2010 8:34 PM, Sam Morgan wrote: > exactly how do you: > > Set the 250 to switch in at dsp=400, and set the 1.8 to switch in > > at dsp=2.1 > > >