Sweep Speed Question

[umax]

What is the reason for a medium to fast sweep speed detector like the XL Pro. If it is to cover more ground, I can use my IDX Pro and achieve the same results in a fasted sweep speed....

 

[Tom Slick]

It has to do with the detector's filters. The XLT is a four filter detector. The four filters allow better depth in more mineralized ground than a two filter design but a four filter detector needs a faster swing than a two filter machine to get maximum depth. The IDX is a two filter machine. it needs a litter slower swing speed to get it's maximum depth compared to the XLT. If you swing the IDX too fast you can actually make it miss a coin target. Try this test. Place a dime on the ground and set the disc so that you can get the dime. Then swing the coil over the dime at increasing speeds and you'll get to a point that the dime won't be heard. This is one reason the White's Classic series and the IDX detectors don't make very good competition detectors. They don't respond well at really fast swing speeds. The XLT on the other hand will hit a dime no matter how fast you swing. These speeds are not what is used in your every day coin and jewelry hunting. The XLT wasn't designed to be a "medium to fast sweep speed" detector, that's just a result of having more filters than many other detectors.