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"AT MAX, AT PRO, AT GOLD Forum"


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FYI...I Compared The 6.5" x 9" Concentric Coil With The 5" x 8" DD Coil On The MAX..... :nerd:
Posted by: John-Edmonton
Date: December 18, 2017 05:25PM


Interesting results......now you will most likely no get these depths in your soil. The greater the mineralization, the more the depth will suffer. And, if there is a lot of mineralization, the 5" x 8" DD coil will probably do better depth wise over the 6.5" x 9" coil. However, in the medial conductivity range, gold/pulltab area, the 6.5" x 9" concentric coil really out performed the DD coil, by a substantial margin.

On the plus side of concentric coils, they get a better degree of accuracy identifying targets both audibly and on the screen. This is a real bonus, if you are a jewelry hunter, and hunt parks for coins and jewelry. They also perform well in the water. If you learn to pinpoint off the inner front toe, as you hold the pinpoint button and move the coil from the center back away from the target, the point where the target cuts out is dead center of where the target is. Another trick when pinpointing this way, is to listen to the audio when it cuts out. The faster it abruptly stops, the more shallow the target is. So, without looking at the screen, you can estimate the depth of the target. Concentric coils also tend to read screw caps not as a coin, but junk.

On the plus side of DD coils, they work better in higher, mineralized soils. They may outperform a concentric coil by separating targets in junky areas, but not by a whole lot.

Both these coils work well in the woods, where saplings are plenty, in rocky areas and in the water, when you need a smaller coil but still need good depth to find targets.

Take a good lock at the graph, and see how the two coils differ.

Below is a quick diagram on how to pin-point off the inner coil on the toe end. I suggest you get some liquid white out, and make a nice small dot, as shown on the coil.




Re: FYI...I Compared The 6.5" x 9" Concentric Coil With The 5" x 8" DD Coil On The MAX..... :nerd:
Posted by: Coin Rescue Inc
Date: December 19, 2017 11:48AM
Great Post - John !!!

Thanks

Re: FYI...I Compared The 6.5" x 9" Concentric Coil With The 5" x 8" DD Coil On The MAX..... :nerd:
Posted by: copperdave
Date: December 19, 2017 04:38PM
Thanks John. A while back I made the decision to sell the AT Gold rather than the AT PRO.. I then bought the MAX. I have been happy with that decision. However my brother recently moved to Arizona and is getting into gold panning and talking about claims. I'm wondering if I messed up not having the AT Gold now. I believe the MAX and the PRO can still find small nuggets. And now with your new information I'm considering adding the concentric coil for small gold. Thoughts????????? I realize AZ may have a lot of mineralization but won't know till I get there. I should have just kept the AT Gold then have all three and I wouldn't be questioning it. ugh

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Re: FYI...I Compared The 6.5" x 9" Concentric Coil With The 5" x 8" DD Coil On The MAX..... :nerd:
Posted by: John-Edmonton
Date: December 19, 2017 09:19PM
Most any detector can find gold. The Gold and the Max are both suited to find gold including tiny nuggets, especially due to the true all metal mode, threshold ability and automatic ground balance window. The results of the medium size 6.5" x 9" for it's sensitivity to gold was a complete surprise to me. You should do fine with the max. If searching for gold, the smaller coils work better.

Good luck!

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Re: FYI...I Compared The 6.5" x 9" Concentric Coil With The 5" x 8" DD Coil On The MAX..... :nerd:
Posted by: John-Edmonton
Date: December 19, 2017 09:20PM
Your welcome. I too was surprised at the results. I have been using concentric coils for many years, and prefer them over DD coils.

Re: FYI...I Compared The 6.5" x 9" Concentric Coil With The 5" x 8" DD Coil On The MAX..... :nerd:
Posted by: copperdave
Date: December 20, 2017 05:36PM
Thanks John for the advise. I plan to take both the Max and the Pro to AZ and hope it goes well. I think the Pro will function alright as well.. I'm excited to give it a try.

Re: FYI...I Compared The 6.5" x 9" Concentric Coil With The 5" x 8" DD Coil On The MAX..... :nerd:
Posted by: synthnut
Date: December 23, 2017 01:56PM
I have found larger gold with my AT Pro,but my Vista Gold would be my go to machine for smaller gold ......Jim

Re: FYI...I Compared The 6.5" x 9" Concentric Coil With The 5" x 8" DD Coil On The MAX..... :nerd:
Posted by: copperdave
Date: December 23, 2017 04:01PM
thanks, all I can do is try both the max and the pro and hope for the best. Just part of me wishes I didn't sell the Gold, however I wouldn't have bought the Max.. Ugh the dilemma. I have faith the MAX will do it.

Re: FYI...I Compared The 6.5" x 9" Concentric Coil With The 5" x 8" DD Coil On The MAX..... :nerd:
Posted by: copperdave
Date: December 24, 2017 08:21AM
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