I've been experimenting with various settings. I discovered that with the machine in 5kHz, my Nokta pinpointer interferes mightily with the Kruzer. That must be the frequency of the pointer. Anyway, by separating them as much as possible, the interference lessens or goes away. Today, I went to the section of the park where good finds have disappered (even Zinkers, if one can call them "good.") I didn't find much; about 5 zinkers, a nickel and a small, sterling toe ring. The learning process continues....