The 160m USB report works great! (also the dupe report.) Turns out I have nearly 2000 160m QSOs logged as USB in Dxbase 2005 (virtually all contest QSOs imported in Dxbase). Is there a way to make a blanket change? I am not keen to manually edit 2000 QSOs.
On a related topic, I have about 600 old Czechoslovakia QSOs with the wrong ITU Zone, is there an easy way to change these? 73, Bill NT1Y Topsham VT

