Hi Y'all, I have read George's article, and have to say I concur with his analysis of DSP vs. Xtal filters. Well done George. An article written by myself & Adam, on ICOM DSP based radio, and the use there of, would go well with George's article if read concurrently. Stop in on my site to read it, and any of the other articles I have there. www.qsl.net/kk5dr/ 73 de Matt KK5DR