Lynn, For Modes like MSK144 FT8 JT65 you need to be much closer than that! Better than plus or minus 1 second is required. 73 from David GM4JJJ > On 13 Sep 2017, at 18:22, Lynn W. Taylor, WB6UUT <KX3.1 at ColdRocksHotBrooms..com> wrote: > > For what it's worth, plus or minus 30 seconds isn't all that big a deal. > > .