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Best Settings On GPZ 7000 For Mild Soils

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I am after some advice, I purchased a GPZ 7000 late yesterday and of course I am keen to take it out today for a test drive.  I am pretty clueless with this machine, although I've watched JW use it many times I've not paid any attention to how he runs it or what he does with it as I never thought I'd be buying one.  I think his settings may not be ideal for me yet anyway as he runs it crazy hot, being a beginner I'd probably need more tame stable settings 🙂

JW is unable to be contacted this weekend, Queenstown's big music festival of the year which JW always attends going on for the weekend so he's off at that so I can't get any advice off him for my mission today.

I was hoping GPZ users here would be able to give me some advice on what to do.    I don't have time to properly read the manual today as I've got a big drive to get to a gold spot, I was thinking I'd just do a quick start and get going but if there is something obvious I should be doing to use it in mild soils please let me know.  If the default settings are more suitable for tough soils I'd be wasting my time.  I'll have to start reading the manual tonight after I've used it today 🙂

I've ordered a 10" and 12" X-coil for it which I believe to be the best two coils for use in NZ with JW's results.  I'm also going to use the Chet method of a longer style adapter patch cable for it, I like the idea of his method and it also makes changing coils easier which I like the idea of. 

Here's my new toy.


Any help greatly appreciated.

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Congrats on the new toy Simon. Keep it as simple as possible at first. The number one move for mild soil and small gold is to go from Difficult to Normal and audio smoothing off. Then run the sensitivity just like a VLF, high as you can while staying stable. Good luck!


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Awesome, thanks for the prompt reply and good information! Gotta love this forum. 

I still have both kidneys too!

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Start with High Yield/Normal/ Audio smoothing:off / Ground smoothing: off. My sensitivity starting point is usually 6-8, then I slowly increase until the machine becomes too unstable. In my experience, running the machine very hot (Sensitivity >13) is catching more shallow gold assuming your brain can process all the chatter, whereas you will miss deep faint targets with sensitivity set too high. Another advice, use the ferrite with GB set to semi-auto (so it keeps the iron track constant). The 14 in coil works best with strict coil control keeping both sides at level, and slow swing speed (I use the guide arm regularly for coil control). Watch for anything that is metal containing within about 2 feet or more near the coil, i.e. metal in your shoes is no good.  The tracking of the Zed is awesome, just slow down with coil speed to allow the machine to run as stable as possible. I pump the coil every now and then, especially to reconfirm targets  (but don't press the track button while doing). Also, put a cover on the control box. The screen scratches easily. Have fun.

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Thanks, great tips, I am trying to find a control box cover for it, it appears you can't buy one in NZ so I'll have to try find one overseas that posts to NZ for a reasonable price.

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One more thing, sometimes (but not very often)  I hear targets better in general than in high yield. Not sure if depth is the only contributing factor, but at general the detector is pushed to it's limits as it tries to process deeper grounds as well. If the ground gets too hot (likely not in your ground) then dial down the sensitive but keep it at normal whenever possible. Running in normal you can still ID targets at very low sensitivity (i.e.4 or 3), but if you switch to difficult then you loose a lot that will not be compensated with higher gain. Extra deep I only use on my 19 in coil.  

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And yeah for that money I would have expected the control box screen to be more durable....

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I didn't get to do a proper prospecting trip today as my back was still sore from my days of sluicing so my wife decided I needed to rest rather than make my back worse.  I don't know which was more painful... my back or not being allowed to go use my new toy. 🙂

I took the detector down to the river behind my house to have a swing over some little nuggets.

First impression.....

The screen is great, I love the modern design and easy to use interface, a vast improvement over the GPX with it's knobs and switches.   Felt far more modern than the GPX.
The screen is also bad, as it's damn hard to see it in bright sunlight, I did notice it has brightness controls so maybe I need to play with it a bit more to adjust it, after all I was in default everything.
The detector itself seems easy to use and understand, I was using it like I'd been using it for months on my first time.  No difficulties understanding anything and it has a very nice interface.
The threshold was very stable, far more so than I'm used to with the GPX
Ran near the power lines fine, no issues at all, a feature that I see as a real benefit for my detecting locations.
It felt heavier than the GPX, maybe due to the bigger coil, I prefer smaller coils on the GPX for most of my detecting
I love the swing arm, why did I take so long to get one these things, what a feature! brilliant.
Used the settings suggested above and was able to detect all of my test nuggets, wasn't as good as I hoped on very small nuggets but I am sure once I put the 10" X-coil on it that will dramatically change.  I can't wait to get that coil, it's the main reason I wanted a GPZ.
Audio was nice, it sounds slightly different to the GPX but similar enough you get used to it very quickly, in fact it sounded better.
Sensitivity and depth on bigger targets... incredible.
Gain? Max was possible, wasn't too bad at all, the threshold became a little unstable but targets still really stood out
Ground balance wasn't an issue, my soil was invisible to it without doing anything.  Of course I will do the procedure but I didn't need to

Overall impression, love it.

I can't wait to take it for a proper detect.....

So am I very happy with the purchase? You bet I am, extremely happy and very thankful to a very special person who made it possible.  I did not expect to ever own a GPZ and it's not even my birthday for a couple of weeks yet! 🙂 👍

I'm not bothered by a pending new detector that could be better than the GPZ or I would have held off on the purchase just in case..  The GPZ + 10" and 12" X-coil is my dream combination and that's becoming a reality for me.  Happy as can be!

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53 minutes ago, phrunt said:

damn hard to see it in bright sunlight

I thought it was a direct sunlight viewable display - maybe I am thinking of the Equinox?  I thought if you actually directed it straight at the sun it was easier to see?  

54 minutes ago, phrunt said:

The detector itself seems easy to use and understand

Yep, very straight forward  👍

55 minutes ago, phrunt said:

I love the swing arm,

Makes a massive difference to weight control and coil control.  

58 minutes ago, phrunt said:

Audio was nice

Loved the audio.  So much better than the QED.  


59 minutes ago, phrunt said:

So am I very happy with the purchase? You bet I am

😊   That's all that matters.  

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Simon, since you will be dying to use it everyday anyway take it to the coin field near your house and hit the most hammered area. I'm curious if you pick up any deeper silvers.

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