konabikemike
New member
I would like any comparison of these to coils( 18.75 khz 9" concentric & 10" DD round ) against one to the other on the beach and to gold targets on black sand beaches .any comments.lets hear.
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Comparison: 18.75 khz -9"concentric to the 10" DD
- Thread starter konabikemike
- Start date
BarnacleBill
New member
When you say beach I'll assume a saltwater beach. On damp/wet sand, hands down the DD for two reasons.
1. You will be able to run the sensitivity significantly higher than on a concentric.
2. Coverage as far as the coil pattern, which also pertains to dry sand also.
Therefore higher sensitivity will mean deeper targets.
HH
BarnacleBill
1. You will be able to run the sensitivity significantly higher than on a concentric.
2. Coverage as far as the coil pattern, which also pertains to dry sand also.
Therefore higher sensitivity will mean deeper targets.
HH
BarnacleBill
konabikemike
New member
So Based on what are saying . I believe that the 10' round DD is the better coil overall .I will not be in salt water area only fresh water with black sand and surf.also fields and schools for coins and jewelry .one coil to do it all.
BarnacleBill
New member
If you are in freshwater then you want to make sure the "black" you are seeing is caused by minerals and not decaying organic material. Some people see black and automatically think magnetite. So this may change some factors to consider, conventional wisdom is concentrics size for size are deeper, and disc a little better. But the 10.5 DD is slightly larger than the 9 inch concentric which may make up for the depth difference.
If you know for sure it is magnetite, and plan on spending a fair amount of your time on this/these beach areas then go for the DD.
HH
BarnacleBill
If you know for sure it is magnetite, and plan on spending a fair amount of your time on this/these beach areas then go for the DD.
HH
BarnacleBill
konabikemike
New member
Very helpful. Yes to the black sand (magnetite) we have plenty here on Ontario beaches .looks like I have to buy one for the new detector that I hope to get in the next two days .most likely Xterra 50 or M6 so then I have to buy the 6x10 DD for the Whites.Thank you BarnacleBill
Michael
Michael
coinsh00ter
New member
Just following the post and wanted to pose this question to the experts, would you rather have the X70 or MXT with stock coil, or buy the X50 or M6 with two coils, assuming you would get the 10.5 inch hf dd coil with the Minelab and the best equivalent with the whites.
Personally, I have not used the X50, but am very happy I went with the X70 with the more advanced ground tracking and prospecting mode.
I know I'll eventually buy the coils in the future anyway.
Dave in NJ
Personally, I have not used the X50, but am very happy I went with the X70 with the more advanced ground tracking and prospecting mode.
I know I'll eventually buy the coils in the future anyway.
Dave in NJ
Neil
Well-known member
Coverage is a big advantage with any of the DD coils, but especially on the two larger DD coils as they hold their pattern deeper in the ground, versus the eliptical design. I found all three of the hi freq coils will balance to the wet salt sand and find the larger DD coils to be as deep or deeper than the concentric coils.
HH
Neil
HH
Neil