GPZ 7000 vs GPX 5000 - Video by JP!

[DDancer]

I noted the noise, stability, differences between the GPX and GPZ as well as the target response.  I have to agree one will see what they want to but that kind of stability and response says volumes to me   Well done! 

Didn't loose a lot of time ground balancing either with the GPZ unlike the GPX and that is a big plus as well.

[rumblefish]

Of course, Steve. I wasn't disputing the all-in-oneness of the GPZ. Only pointing out, from what I saw and heard, that the GPX hasn't suddenly become awful overnight. But since I don't have one anyway, I'm not really worried!

[fredmason]

Happy Bithday a little late, Jonathan!

 

Your hat-cam was making me sea-sick...but it is always a thrill to vicariously dig a nugget down in Oz with you.

 

fred

[calgeologist]

This may be an incorrect assumption here so please correct me if im wrong.  The 12x15 elliptical acts like a 12 inch mono right? And the GPZ is running a 14 inch coil.  So there is a disparity of 2 inches there.  Maybe a 14 incho mono would pick it up louder on the GPX?  I need an expert to weigh in on this since this could be based on no actual fact.

 

Either way its great to finally see a head to head test!

[jasong]

Keep in mind that the 15x12 is specifically referenced in the Minelab 7k vs 5k performance graphs so I'm guessing that might be one reason why it was used. Anyone looking for evidence of claims on those widely circulated graphs now have a video to reference as well.

 

Agreed, great video.

 

Not an expert here, but my experience is that coils roughly scale in equivalence by area. The area of a 15x12" elliptical is roughly equal to the area of a 13.5" round. The DOD coil is 13x14 making it's total area almost exactly equivalent to a 15x12 if you do the math on it.

[wirelessguy]

What gets overlooked is that the GPZ is doing what the GPX can do with a bigger coil, or a smaller coil, or different timings, all at once with one setting and one coil. Yeah, I think the GPX in multiple passes with multiple coils and different settings can give a GPZ with a single setting and coil a run for the money in many cases. As long as you have time to hit the same ground multiple times. And even then, the GPZ will hit some gold a GPX just can't hit.

Any light bulbs?

 

 

BINGO!   I was thinking the exact same thing last night when I read this thread and the chart comparing GPZ and GPX 5000 having "same " performance and planned to pose in form of a Q this AM.  Steve insightfully answered my Q before I could write it!    As has been the case all over this excellent web site.

 

I am told by my USA dealer he should be able to ship my paid for GPZ 7000 early next week.  Can't wait! 

[Bearkat]

GPX in Fine Gold was the problem! Normal with high gain would have hit that sucker. Pretty big piece of gold. 

Good video none the less showing a real live test with the new GPZ 7000. 

[Bearkat]

Here is another video of the GPZ 7000 from one of my Youtube detector buds (Nenad) in Adelaide hills area:

 

[cobill]

There is a signal from the GPX - JP mentions it himself in the video. But it is extremely weak.

The problem with video of course is people see what they want to see. If the desire is to see proof the GPZ is better, that is what you see. If you are skeptical of the GPZ, you see a dozen reasons why the GPX could have done better. It is one big reason I am not very excited about doing video myself.

For instance if you want to go down the rabbit hole you can just go with the possibility that maybe all the GPX needed was a 16" mono. The GPZ has no coil options at this time. Or if the GPZ hits a small specimen, you can mention that the GPX may have hit it with a small coil. Or different timings.

What gets overlooked is that the GPZ is doing what the GPX can do with a bigger coil, or a smaller coil, or different timings, all at once with one setting and one coil. Yeah, I think the GPX in multiple passes with multiple coils and different settings can give a GPZ with a single setting and coil a run for the money in many cases. As long as you have time to hit the same ground multiple times. And even then, the GPZ will hit some gold a GPX just can't hit.

Any light bulbs?

For me pounding old patches is fine and dandy, but my personal use of the GPX is going to be for patch hunting and knowing that I have the best shot first time no matter what in a single pass of getting what is there. I am going to spend most of my time this summer detecting on ground that has hopefully never seen a coil, and it will see mine just once.

Honestly though, if you have a GPX 5000 and a bunch of coils and know which timings to use and a SDC 2300 and the time to apply it all in various combinations, then you are pretty well set, and no burning need to get a GPZ 7000.

Steve, great indepth thoughts about JPs video (Happy Birthday JP). I came to the same conclusion indirectly 2 weeks ago:

 

"Honestly though, if you have a GPX 5000 and a bunch of coils and know which timings to use and a SDC 2300 and the time to apply it all in various combinations, then you are pretty well set, and no burning need to get a GPZ 7000."

 

When I go out detecting I usually only have 1 - 3 days in a large area and don't have the time and knowledge it takes to apply all the timings in various combinations. So my decision was easy and JP answered my only open question....I sold the GPX with 11 coils and have ordered the GPZ!

 

Bill