On Wed,6/3/2015 10:37 AM, Ed Sawyer wrote: > My experience is that the first 1000 ft of radi is critical and that 100 > foot pings are not sufficient. As you have said, it depends a lot on what your terrain is. HFTA author N6BV, having a general idea of my terrain, advised me to go out 10-15 miles. 73, Jim K9YC