Went hunting yesterday with a friend who owns a CZ7. We decided to go hunt under the ski lifts.......no snow here yet, and look for older "missed" finds. The most bountiful area that produced really well....was closer to some high tension power lines. My Cortes could almost work under them!!! The CZ7 had to stay 50 feet away!!! And I guess lots of the folks who did manage to hunt under the lines must have had their discs turned way up!! I actually dug 28 nickels ...( a personal record for one hunt ). In there......yes you guessed it..... a smaller ladies 14K band that read at "nickel". Here's the weird part of this experience..... I hunt as I usually do with my disc set at halfway between "min" and "iron". I could only detect about 50 percent of the nickels at the iron disc level !!! Interestingly enough; the ring would barely make a peep at the iron disc level yet rang out loud and clear at the mid point between min and iron. Must be something in the soil. My buddy with the CZ7 located tons of rusted bottle caps (as usual....so did I when I owned one of these) and only a handful of change.........only 6 nickels. I know the Cortes is not for everyone but in my case this is a super detector..........wonder why so many people put it down???