Purchased a GPX- 4500 package and an additional 12" round NF Evolution coil from Chris at AZO and took it for it's maiden run today. It was toasty in Central AZ today but I just had to give the new set up a go for a few hours. Not a bad first run... scored three little nugs.
Totally HOT set up.
Been reading a lot about the new Coiltek, Nugget Finder & now Detech coils of late. I haven't had much to do with any of these but have detected a small area immediately after 2 x GPX4500 with the Coiltek Elite 14" mono attached. Although not an exhaustive or scientific test the end result was I got 8 x subgram nuggets from the area with the SDC & the 4500's nothing. 2 of the subgrammers came from adjacent to their scrapings so they knew something was there but was still iffy enough to walk away from. I keep hearing or reading how these coils are transforming GPX's into SDC's or even GPZ's but this short "test", for want of a better word, put some doubts in my mind.
I've got no doubt that there is improvement in the new coils in how they enhance the target information or audio response of the detector through better windings etc. but I'm not entirely convinced it's as substantial as some make out. My thoughts are it may be about 10% performance improvement (every bit does help regardless) & 90% of a placebo effect i.e. you buy a new coil excited by the possibilities of it's performance, you regain some enthusiasm & become more positive in approach even detecting more carefully + with more purpose - then when you find gold of course it's the new coil that done it right?
Another thing that has me scratching my head is how excited people are about them finding very small gold. My smallest bit with a GPX5000, fine gold & standard 11" Minelab Commander mono coil was 0.03 of gram (I think about 0.46 of a grain) so they have always been capable of doing it even with an unfashionable coil (but still a good one).
Like I said I'm not doubting that there are definite performance improvements, much like the introduction of litz wire, but I do believe a lot can also be attributed to a refreshed or reinvigorated enthusiasm too.
New detectors could also have a very similar affect on us. What do the experts reckon?
I was wondering if the aftermarket coils were that much better than the Minelab, i.e Coiltek.
I'm very hesitant to go Coiltek because the GPX was designed to use only Minelab coils?
My fear is i don't want to hurt my GPX 5000 in the long term by putting a coil on it that Minelab doesn't like?
It seems like everyone with a GPX is using a aftermarket coil. I especially like the Coiltek 9" Elite
I'f you were me would you get a Coiltek coil?