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Has anyone used 5" DD Coil?
- Thread starter amustel
- Start date
dinky appearance way down on the far end of the rod .... however, once you get used to using it, and have the patience to take your time and sweep slow and methodically in and around the problem at hand, they are great!
I found an 1887 Indian Head cent in some sidewalk repair night before last using the stock 10" concentric on my Omega, then returned last night, quickly swapped it with my 5", and re-hunted the repair work. I got a nickel and penny that I didn't get the night before simply because they were masked by the small iron bits, old rusty nails, and some really challenging ground (rocks and such).
So far, I don't have any complaints about it. Matter of fact, one think I like is that it is white, which makes it easier for the eye to track and know where it is positioned as you work in and around brush and building rubble.
I think most people ought to have a 5" coil in their arsenal.
Monte
I found an 1887 Indian Head cent in some sidewalk repair night before last using the stock 10" concentric on my Omega, then returned last night, quickly swapped it with my 5", and re-hunted the repair work. I got a nickel and penny that I didn't get the night before simply because they were masked by the small iron bits, old rusty nails, and some really challenging ground (rocks and such).
So far, I don't have any complaints about it. Matter of fact, one think I like is that it is white, which makes it easier for the eye to track and know where it is positioned as you work in and around brush and building rubble.
I think most people ought to have a 5" coil in their arsenal.
Monte
a Double-D coil. As a matter of fact, I usually don't have all that much difficulty "pinpointing" with either a concentric or a wide-scan (D-D) coil. A DD design doesn't have a responsive field from "tip-to-toe" for the entire depth capability, especially on larger-sized coils. They sort of "dish-out" and he strongest target response, on a perfectly-positioned, "flat" laying coin, for example, is still going to be roughly dead-center of the coil. The same as might be experienced with a good concentric coil.
Internal coil placement of a 'pick-up" or tuning wire or circuit in a coil can through the targeting spot of slightly, regardless of the coil. D-D designs have their problems due to the fact that the approach to the targets, from the left and then from the right, has a somewhat different effect on the field and the signal processing because of the different assignment of the two coils (Tx and Rx).
Where more challenge comes with pinpointing in general is with the detected target's size, shape, depth, and especially position (especially with coin and ring-shaped objects). A coin laying "flat" to the search coil at about 3"-4", for example, should generally 'pinpoint" just about dead-center. If the coin has settled on a root or rock or is otherwise positioned such that left edge of the coin is tilted up (closer to the coil) and it's on something like a 45
Internal coil placement of a 'pick-up" or tuning wire or circuit in a coil can through the targeting spot of slightly, regardless of the coil. D-D designs have their problems due to the fact that the approach to the targets, from the left and then from the right, has a somewhat different effect on the field and the signal processing because of the different assignment of the two coils (Tx and Rx).
Where more challenge comes with pinpointing in general is with the detected target's size, shape, depth, and especially position (especially with coin and ring-shaped objects). A coin laying "flat" to the search coil at about 3"-4", for example, should generally 'pinpoint" just about dead-center. If the coin has settled on a root or rock or is otherwise positioned such that left edge of the coin is tilted up (closer to the coil) and it's on something like a 45
Yes, that small coil is hot in trash. Picture it as a 1" x 5" coil, instead of 5" round. One morning I pulled 70 coins out of a trash filled strip of lawn 3' x 70'. I was able to crank up the sensetivity up to max. Dug a clad quarter 6.5" deep, measured. Where the targets are numerous, this coil really pulls out the keepers, due to its size, and the fast target response/ reset of the omega.