Being a conscious owner/user of more than one X-Coil in my possession & although this is not an X-Coil thread) JP is not wrong in what he states, but not all right either.
Like I stated during my initial testing of the first X-Coils when first introduced, some of the first & earlier X-Coils, did have issues trying to ground balance the ferrite out, (especially noticeable on the smaller & more highly sensitive 10X9 X-Coil) but this minor set back I found, did not alter nor degrade the coils ability/performance, to clearly pick up gold over/in mineralized ground, at depths yet to be seen by any other similar in size coil manufacturer.
These early issues when brought forward to the X-Coils manufacturer, were quickly rectified to the point where the X-Coils on the GPZ 7000, now reign supreme when talking in-ground target depths, over that of the current Minelab 14X13 or 19 inch coils. They simply cannot be beaten for depth on/over all size/type in ground nuggets. BTW, I've never encountered any bump sensitivity issues with any of the X-Coil range in my possession. Mind you these are only my findings over the years testing & comparing coils. I currently own/have 5 X-Coils of different shape/size, all of which have found gold to some degree over thrashed ground, ground that I went over with the Minelab coils prior, using the same settings. All my testing has been done over both on in ground undisturbed targets, as well as over gold in air tests & to say I haven't put the X-Coils up against the standard 14X13 or 19 inch Minelab coils, testing & comparing over natural gold nuggets, (not 5 cent or 50 cent coins, or pieces of lead, copper, brass or aluminium cans) in order to see the differences between coils, would be an understatement.
I cannot talk for, or of the capabilities of the newly designed Nugget Finder 12 inch round coil, till I myself put it through its paces over mineralized ground/gold nuggets & until then, no assumptions will be made.
Once again & through my own behalf, I've let this topic stray from its original topic question, to the discussion of something other than the original question asked. For this, my apologies to Charlie. Now could we please stick to the main topic question, "GPZ 7000 Ferrite" for this is not an X-Coils comparison/discussion thread.
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