The Minelab Explorer SE comes with a stock Double D coil. For users coming with concentric coils, the transition to the Double D can be a little challenging.
It’s important to state the transition is only weird based off of the design of the Double D. Once you know how to work the coil, it’s extremely accurate.
A concentric coil has the hottest part of the coil in the center, so it’s extremely easy working your way to the center. The Double D is like having two coils together, merging at the center strip. By doing this, the whole strip or bar is the hottest area of the coil during pinpoint.
Initially, when I was first learning the ins and outs of the Minelab, I was extremely concerned with the pinpointing. I felt like I was all over the place and could be off several inches. This was definitely not good. All of these tests were with surface targets (since it was the middle of winter when I purchased the SE), so after getting some real world field time, I began to understand what the detector was telling me.
The particular technique that I apply is as follows. After getting a signal isolated, I jump to pinpoint. I swing left to right slowly getting the center point of the horizontal plane. I stop at the loudest point of that and begin to push forward or back on the vertical line till I get the hottest sound.
Now, the behavior changes with surface targets vs. buried targets. Surface targets seem to hold same strength on the vertical line. If you push the coil till it drops off, at that point (minus an inch) is where the target is located. Buried targets tend to behave with varying signal string on the vertical line. I find it very similar to concentric coils.
Pinpointing is easy and extremely accurate once you get the hang of it. Practice, practice and more practice will get you dialed in. Another suggestion is to purchase a smaller coil. There are many after market coils that work great and the smaller coils are much easier to pinpoint.