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Important Topic by George: Deep coin shooting with a concentric coil???

April 16, 2019 06:50AM
Deeper for what coin?

It was determined long ago that 8" was the ideal size for a dime sized object. A 12" coil will not detect that dime any deeper, in real ground, BUT, would pick up a larger coin (say a silver dollar) deeper than the 8". This is because of the signal (coin) to noise (ground) ratio. Bigger coil means much more ground in the Tx/Rx field.

That is why to find a buried treasure chest, you would use a 2-box detector, which could detect the box feet deep. But it could not detect a dime laying on the surface!

Small coins - 8". Large coins - larger, to a point. I really don't know what the optimum size coil would be for a silver dollar coin. Maybe Monte knows.



Edited 1 time(s). Last edit at 04/19/2019 06:22AM by Monte.
Subject Author Views Posted

Important Topic by George: Deep coin shooting with a concentric coil???

glabelle 197 April 16, 2019 06:50AM

Related Reference if you're interested -

UtahRich 111 April 22, 2019 11:47PM

Related Reference of interest? Well, I'm not, and I don't mind commenting on it, either.

Monte 98 April 23, 2019 07:55PM

Coils and Coins -

UtahRich 73 April 23, 2019 08:46PM

Re: Related Reference if you're interested -

glabelle 85 April 23, 2019 07:11AM

Coil Sizes and Depth on Coins -

UtahRich 72 April 23, 2019 08:40PM

Re: Coil Sizes and Depth on Coins -

glabelle 56 April 23, 2019 09:37PM

Coil Sizes and Depth on Coins -

UtahRich 54 April 23, 2019 09:44PM

Re: Related Reference if you're interested -

OregonGregg 76 April 23, 2019 05:45AM

Re: Related Reference if you're interested -

UtahRich 60 April 23, 2019 08:54PM

Pardon me George and others, but this is a great topic.

Monte 128 April 19, 2019 10:35AM

George, this is a great topic. Question for Harold,ILL

UtahRich 99 April 19, 2019 05:45PM

Comments for Rich (Utah) from Monte.

Monte 99 April 20, 2019 08:40AM

What is DEEP ? - Some Detecting Options

UtahRich 104 April 20, 2019 07:43PM

Re: What is DEEP ? - Some Detecting Options reply Rich Attachments

Kickindirt 87 April 20, 2019 09:12PM

Re: What is DEEP ? - Some Detecting Options

OregonGregg 84 April 20, 2019 08:06PM

Re: What is DEEP ? - Some Detecting Options

UtahRich 67 April 20, 2019 09:22PM

Re: What is DEEP ? - Some Detecting Options Attachments

OregonGregg 76 April 20, 2019 09:35PM

Re: Pardon me George and others, but this is a great topic.

glabelle 85 April 19, 2019 04:43PM

George, I'll respond to your 5-points.

Monte 99 April 20, 2019 05:42AM

In a nutshell . . . . .

UtahRich 65 April 19, 2019 07:48PM

Re: In a nutshell . . . . .

glabelle 83 April 19, 2019 08:42PM

Preferences -

UtahRich 63 April 19, 2019 11:48PM

A few last comments on coils and absolute depth Attachments

glabelle 84 April 20, 2019 09:24AM

George, a simple reason I described the 'cone.'

Monte 83 April 20, 2019 03:59PM

Adjacency - And why is that still there thinking

UtahRich 72 April 20, 2019 06:13PM

Re: Adjacency - And why is that still there thinking Great Post Richthumbs up

Druid 64 April 21, 2019 09:49AM

Re: A few last comments on coils and absolute depth

jmaryt 55 April 20, 2019 10:28AM

Re: Deep coin shooting with a concentric coil???

Kickindirt 102 April 16, 2019 06:46PM

Re: Deep coin shooting with a concentric coil???

glabelle 94 April 16, 2019 09:57PM

Balancing to ignore the ground?

Monte 85 April 20, 2019 09:22AM

Re: Balancing to ignore the ground?

glabelle 84 April 20, 2019 09:34AM

Re: Deep coin shooting with a concentric coil???

Kickindirt 84 April 17, 2019 11:05AM

Just a thought or two regarding coil size selection.

Monte 76 April 20, 2019 09:59AM

Re: Deep coin shooting with a concentric coil???

glabelle 92 April 17, 2019 04:13PM

What should I use to look for deep silver dimes?

UtahRich 116 April 16, 2019 10:20PM

Re: What should I use to look for deep silver dimes?

glabelle 89 April 17, 2019 09:21AM

Re: What should I use to look for deep silver dimes?

Harold,ILL. 103 April 17, 2019 08:06AM

Re: What should I use to look for deep silver dimes?

jmaryt 85 April 17, 2019 10:44AM

Re: What should I use to look for deep silver dimes?

UtahRich 100 April 17, 2019 04:12PM



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