Admin nuggethunting Posted November 21, 2016 Admin Report Share Posted November 21, 2016 Hey Kevin and all, Here is a copy/paste from the Minelab Treasure Talk from JP. I think it's some pretty honest information on the new GPZ 19-inch coil. You can also visit the page at this link - http://www.minelab.com/anz/go-minelabbing/treasure-talk/practical-tips-for-using-the-new-gpz-19-super-d-coil With today’s release in Australia of the much anticipated GPZ 19 coil, I thought this would be an excellent opportunity to provide some practical field advice to enable early users to get the best results from this ‘beast of a coil’. I’ve been testing and refining it with the Minelab engineering team for quite some time now, and have to say, it’s worth the wait (weight), in more ways than one! Some key points for successful GPZ 19 operation are: Researching the best locations Having realistic expectations Physical comfort and sustainable use Fully utilizing the Gold Mode and Ground Type settings Understanding how a deep target signal sounds/behaves with ZVT technology Let’s now take a look at these points in more detail… Researching the best locations Targeting locations where your chances are increased will be the best approach. With the GPZ 19 this means looking for ground that has had a history of larger than 2 gram pieces at 10” plus in a reasonably confined area or working away from known ground into ground that does not have a history of nuggets being found, taking advantage of the increased depth of GPZ to allow for gold completely missed by others to come to light. It is best to plan your sessions to target dedicated areas and then spend time methodically and carefully going over those areas. Having realistic expectations Using the GPZ 19 coil does not automatically mean your gold take will increase unless you're prepared to first invest some time and thought in how you go about approaching its use. You will find there is a reduction in sensitivity to small targets which means the sub 2 gram pieces are going to have to be either shallow to pick them up or you’re going to have to be prepared to go without while you wait for a subtle deep target. Physical comfort and sustainable use The GPZ 19 coil is heavy. There is no avoiding its weight except for coming to terms with it and then gearing up accordingly. The GPZ 7000 comes standard with a dedicated PRO-SWING 45 harness, which when matched to your body will easily afford, even moderately fit people, the opportunity to swing the coil for hours at a time. If you step outside the supplied gear, there are other available options to suspend the coil for even greater comfort. I strongly encourage potential purchasers of the GPZ 7000 and the GPZ 19 coil to select a dealer who is prepared to spend time with you setting things so you can swing the coil effectively. Comfort and ease of use are paramount to successful GPZ 19 coil operation and this is something I focus heavily on during training sessions. Fully utilizing the Gold Mode and Ground Type settings High Yield High Yield is the Go-To gold mode for nuggets ranging in size from 2 grams through to approximately 2 ounces. However, this is dependent on the shape and size of the target, for instance a specimen containing many ounces can give a better response in High Yield compared to General due to the rough nature of the gold and how that irregular surface affects the way this mode creates a skin effect (eddy current) on the surface of the target. Testing the GPZ 19 coil in the field has shown to me High Yield is very good on nuggets ranging in size from 2 grams through to 12 grams with a very good percentage increase in performance. This is down to the reduction in ground signal relative to the target signal General General is better on the more solid type gold. General creates less ground noise than High Yield, especially surface noise signals such as Saturation and Salt but also general ground variation. General has quite good sensitivity to smaller targets so is probably a better choice than Extra Deep for average sized pieces. However, in Difficult ground type, General will be more prone to knock or rub sensitivity. Extra Deep Extra Deep is a gold mode that is better suited for extremely large nuggets in highly variable ground. It is not a mode for the faint-of-heart and should be seen as a more specialized approach to large nugget hunting in very specific locations where very large deep nuggets have been found before. Understanding how a deep target signal sounds/behaves with ZVT technology The GPZ 7000 in conjunction with the GPZ 19 is a very potent combination, but target signals do not always just ‘jump out’, especially the deeper ones, they require input and interpretation from the detector operator. The smoother and more controlled you are, the better the results. Learn to trust what ZVT is ‘telling’ you. It is the fundamental reason why ‘good gold’ is coming from the goldfields all over again. The typical settings I have used for best results are: Sensitivity: 9 Audio Smoothing: Off Volume: 8 for headphones/B&Z Booster, 12 for WM 12 Threshold: 27 Threshold Pitch: 60 Volume Limit: 8 to 12 Ground Balance Mode: Auto User Button: Ground Balance Mode For GPZ 19 users who take the time to set up their detector correctly and then listen and learn the signal responses from their own local conditions, this large coil will deliver more of the golden results you are after – just as I have experienced during the testing phase of the coil development. I’ll be following up with some more advice about settings and ZVT in general, in another blog quite soon. Good luck out there! Jonathan Porter Aurum Australis Comments To make comments you must be logged in, please note comments will not display immediately due to moderation Quote Link to comment Share on other sites More sharing options...
AuWanderer Posted November 22, 2016 Report Share Posted November 22, 2016 One thing that keeps me from upgrading to a gpz is it seems since the gpz has been out that its a complicated machine to use. I machine should be simple to use especially for people like me who are not so technologically proficient. I do like the idea of new innovative technologies but ones that the average man / woman can learn and use confidently in the field. Hopefully Minelab considers this in their next GPZ 8000....I will just stick to the 4500 for now.... I hope the 19" Coil is a success with those who step up and take the challenge... Quote Link to comment Share on other sites More sharing options...
Admin nuggethunting Posted November 23, 2016 Admin Report Share Posted November 23, 2016 Hey AuWanderer, Actually in my opinion, the GPZ 7000 is the simplest detector I have used since like the SD2000. The GPX is far more confusing with all the timings, settings and switches. All the training I have done in the last year, I can say I haven't had one customer call back about how to operate a GPZ, but could show you a hundred plus emails on questions on the GPX 4500 & GPX 5000. On the GPZ, they made it simple, you choose 3 ground conditions and three gold settings. The rest of the stuff like volume, threshold and such, you preset and leave it alone for the most part. Just my thoughts from training on these units over the last year. Quote Link to comment Share on other sites More sharing options...
AuWanderer Posted November 23, 2016 Report Share Posted November 23, 2016 That's encouraging Rob , thanks for motivating me more....I have been told by some who run a zed ..I will be upgrading in the future...I better start preparing lol..time to throw a few tid bits in the GPZ can..... Quote Link to comment Share on other sites More sharing options...
Admin nuggethunting Posted November 23, 2016 Admin Report Share Posted November 23, 2016 Hey Auwanderer, I think anyone that is running a GPX unit, preferably the 4500 or 5000 aren't missing much of the gold within normal detecting range. The new Elite and EVO coils have bridged the gap a bit on the GPZ 7000, but that would be against the 14x13 (in my opinion). It's hard to compare a good user on a GPX 5000 with a 25-inch NF coil and say it's better than the GPZ 7000 with stock coil. It's kind of a no brainer on a larger nugget that a coil that size would probably detect deeper than the GPZ. I can tell you I missed hundreds of nuggets with the GPX 5000 using the Coiltek 14x9 Blitz Mono and smaller coils that I found with the GPZ 7000. Biggest to date are a 1.2 ounce specimen and 3 nuggets in the range of 1/3 - 1/2 ounce at great depths. All the other nuggets I found in old patches with the GPZ last Summer were in the range of .25 Grams to about 3-4 Grams. Quote Link to comment Share on other sites More sharing options...
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