I use a kenwood 930s and a timewave 599zx audio dsp. I am thinking of putting some cw crystals in the rig at a couple of I.F.'s. Would that make much of a difference to warrent the expenditure? What frequency range is advised? Also a friend told me to stay away from kenwood xtal filters and go with inrads due to the steep skirt. Any thoughts on this? thanks in advance john