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Offline goinbabcattandshotupTopic starter
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« on: August 03, 2012, 01:50:02 am »
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Hi friends
I want to making pinpointer coils like cComega coils,unfortunately I dont have any data about its structure, I ask you give me some data(documents)  and how much depth it can search?
my another question is: DD coils with below coil diameter(13.5") how much is it depth?
thanks


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Offline GoldDigger1950
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« Reply #1 on: August 03, 2012, 06:57:08 am »
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Do yourself a favor and browse the DIY sections here. These and many other questions have already been answered regarding making your own coils. Lots of times. I have personally answered each of these questions in great detail and am not going to do it again.

Browse. Don't search. You'll learn a lot along the way.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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Offline kgxlt61
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« Reply #2 on: February 10, 2013, 09:35:50 pm »
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Here is a link that discusses many types of coils. If I knew what type of coil you wanted to build I could link you to another pdf. Look for coils.pdf

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Kenny

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Offline nickel_n
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« Reply #3 on: February 10, 2013, 11:54:06 pm »
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for some reason i cant open the link Sad

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Offline GoldDigger1950
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« Reply #4 on: February 11, 2013, 06:10:02 am »
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Looks like a dead link to me, too.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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« Reply #5 on: February 11, 2013, 01:09:25 pm »
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Quote:Posted by goinbabcattandshotup
my another question is: DD coils with below coil diameter(13.5") how much is it depth?

This would partially depend on the frequency of the detector. See with a lower frequency you will get a better response on some metals but gold needs a higher frequency, it's all about eddy currents, I think that you should do a bit more research on the subject. You'll soon learn how not easy it is.     

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So many questions so little time

Offline kgxlt61
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« Reply #6 on: February 11, 2013, 02:28:42 pm »
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Here is that link again.  It is a pdf file called "coils".  When you click on it select "download".

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Posted on: February 11, 2013, 02:18:12 PM


<iframe src="

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« Reply #7 on: February 11, 2013, 02:31:25 pm »
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That's one of Carls Papers.

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Offline kgxlt61
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« Reply #8 on: February 11, 2013, 03:26:59 pm »
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That's correct! Great paper. I turned it into a pdf to have an easy link to it.  A great document to start off with.  Smiley


Posted on: February 11, 2013, 03:18:14 PM
Here is another link.  This guy is a retired engineer.  Scroll down click on his electronic circuits or on his metal detector project.  He has great information and the necessary math to get the job done.

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http://chemelec.com/


Posted on: February 11, 2013, 03:23:19 PM
I forgot....I gave you one of his papers "Carl Morland"...Join this site.  It is a great site to join. Many are doing what you want to accomplish.

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www.geotech1.com


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Offline Homefire
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« Reply #9 on: February 11, 2013, 03:34:27 pm »
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Any one that has been on this site for a while knows both of those names.


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