I put together a Surf PI detector kit this week... One of the electronic kits from Silverdog... Everything seems to be working well and as described. I built a little 4" coil to test with, and with a nickel, I'm getting strong signal depth in air, at least equal to the diameter of the coil... Nothing that great, but I still need to experiment with the coil windings, and coil size. Next, I need to box everything, build the body and attach the coil and box, tune everything... And eventually test it out in the field. There's lots of modifications that can be done with this kit, similar to some of the comments above. I don't expect this to be as great as a commercial metal detector... However some folks have gotten fairly good results so have to see how this all works out. I'm just glad to have a working Pulse Induction detector, which is something I've never owned/used before. Looking forward to seeing how a bigger coil does near and slightly under the salt water.
