Andy - I re-ran my WSPR vs WSPRX comparison last night. I had WSPR 173 reports and WSPRX 184 reports. So this time WSPRX as slightly better than WSPR. I still had significantly more CPU shown for WSPR than WSPRX (from Windows Task Manager). 55:36 for WSPR and 10:45 for WSPRX. Bob, WB8ILI bobjane99 at sbcglobal.net