The Omni VI+ already has DSP, and in my experience it works pretty well. Why would you want to add this board? What would it buy you? - jgc John Clifford KD7KGX Heathkit HW-9 WARC/HFT-9/HM-9 Elecraft K2 #1678 /KSB2/KIO2/KBT2/KAT2/KNB2/KAF2/KPA100 Ten-Tec Omni VI/Opt1 Alinco DR-605TQ Icom T90A email: kd7kgx at arrl.net