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Great questions, Rich. thinkingconfused smiley

October 21, 2022 01:33PM avatar
Quote
UtahRich
Q #1.. When is it beneficial to Overlap Coil Sweeps?

Q #2.. When is it less productive to overlap coil sweeps?

A #1.. When you have the time and opportunity to do a better job of cleaning out a potential site.

A #2.. When you have limited time, limited access, or perhaps too much trash / debris to contend with.

Naturally there are other factors involved, but the real unknown for most detector users is:

1.. How Much to Overlap

2.. What are they trying to achieve:
a.. Clean out a littered area while searching for 'partially-masked' good targets.
b.. Work a clan area with deeper-positioned keepers.

Those questions and considerations need to be figured out ahead of time in order to help select the best detector and coil combination based upon the site conditions, the anticipated targets, and just how time-involved or physically-involved we want to be.

I've touched on this topic through the years in my seminars because it does give folks something to think about if they want to really clean out an old park or yard or place that does not have a lot of masking trash. Just older coins and some that are mid-depth to deeper. I do not spend a lot of time discussing it because I simply describe the reality of what it takes to overlap to try and "find-in-all".

Want the simple answer I share if you've already selected the A1 or A2 answers I gave but want to work an old site with old coin potential and find all you possibly can? Well, first thing readers can do is note how I emphasized one word ... work. The majority of detector owners and users are really in the 'Hobbyist' class and just enjoy this great sport. That's fine, we should all enjoy it tp our level. That means there are also some in the more avid or dedicated Detectorist category. The ones who, at times, realize that some sites require more time, more effort, certain detectors and coils, and know that there is potential there if they just devote the time-and-effort for the task-at-hand.

So, if someone has the time and patience and opportunity to hunt a private yard or an old park or other site where there isn't a lot of shallower masking trash and coins are in that mid-depth to deeper range, and they want to 'overlap' and get everything possible, here is my answer:

1.. Use the best detector and coil and settings to achieve the best possible depth-of-detection.

2.. Grid an area you plan to hunt and spend the time doing so.

3.. Waltz the coil, that is counting One-Two-Three as you use a proper sweep speed for the unit and conditions, making one sweep to the side, the second back the other way, and a third sweep as you did the first time because we all now that sometimes a target might only respond in one direction so you hit the sweep-route both ways plus a third time like the first sweep to be sure.

4.. Make all coil seeps in a straight line left-and-right so there is no arcing of the coil to miss coverage, and I suggest keeping them about 20" to 30" long, side-to-side.

5.. While the USA has had smaller-size coins like a Trime, Nickel type 3¢ piece, and Half-Dime, the most used and most likely-to-find older coin, that also happens to be silver, is the Dime. We should Overlap at least 50% of the diameter of the smallest coin we hope to find, and that is the US Dime. The weakest detection depth or smallest signal is going to be in-line with the center axis of the coil, so we ought to go after small silver Dimes buy sweeping side-to-side-to-side ... THEN advancing the coil 50% of the diameter of a Dime and sweep side-to-side-to-side. Then advance the coil that 50% and repeat the triple-sweeps along the same sweep route and continue doing so as we advance through our small gridded area.

Then, when the entire grid has been thoroughly worked from east-to-west, repeat all the gridding, the same way, from west-to-east. Yes, you guessed it, you still need to clean that grid by working it all the same slow and methodical way from south-to-north and then north-to-south. Next you'll need food and water, some rest, get fresh batteries or a full charge, and mark of your next small gridded area to attack.

No real need for discussion because if you give this some very serious thought, you will know I am correct and it explains why there are still good targets to be found in very well searched places like Frisco Utah or Toano Nevada, as well as the many early-era parks, resort sites, etc., etc., in our cities and towns. Thinned down, perhaps, but not cleaned out until worked hard and gridded well and overlapped.

Monte

"Your EYES ... the only 100% accurate form of Discrimination!"

Stinkwater Wells Trading Post
Metal Detector Evaluations and Product Reviews
I'm now 'back home' in Farr West Utah
monte@ahrps.org ... or ... monte@stinkwaterwells.com
503-481-8147
Detector Outfit: A selection of my chosen makes and models, with the best coils mounted for the tasks I'll take on.
F-19 .. Racer .. Vanquish 540 .. FORS Relic .. Inca .. Silver Sabre µMAX .. Bandido II µMAX .. XLT
Pinpointers: Garrett AT Pro-Pointers .. Headphones: 'Hornet' & 'Wasp' .. MS-3 Z-Lynk .. ML-80
*** All working well today to make memories for tomorrow. ***
Subject Author Views Posted

When is it beneficial to Overlap Coil Sweeps?

UtahRich 330 October 20, 2022 11:38AM

How do you walk in a straight line?

GB_Amateur 201 October 22, 2022 10:15AM

GB_Amateur, your addition to this topic fits well.

Monte 187 October 22, 2022 02:18PM

Thanks, Monte

GB_Amateur 233 October 23, 2022 09:57AM

Great questions, Rich. thinkingconfused smiley

Monte 508 October 21, 2022 01:33PM

Re: When is it less productive to overlap coin sweeps?

Sodbuster 186 October 21, 2022 09:36AM

Re: When is it beneficial to Overlap Coil Sweeps?

jmaryt 465 October 20, 2022 06:10PM

j.t., just a brief comment about a 'detection field'.

Monte 171 October 21, 2022 12:21PM

Re: j.t., just a brief comment about a 'detection field'.

jmaryt 204 October 21, 2022 07:02PM

j.t., I agree about the 50% overlap coverage.

Monte 177 October 22, 2022 04:45AM

Re: j.t., I agree about the 50% overlap coverage.

jmaryt 182 October 22, 2022 07:54PM

hmmm . . . . .

UtahRich 194 October 21, 2022 08:41PM

Re: hmmm . . . . .

jmaryt 199 October 22, 2022 08:01PM

It looks like what?

UtahRich 229 October 22, 2022 09:46PM

Re: It looks like what?

Geotech 206 October 27, 2022 12:00PM

Re: It looks like what?

GB_Amateur 177 October 28, 2022 09:52AM

Re: It looks like what?

Geotech 169 October 29, 2022 01:54PM

Re: It looks like what?

GB_Amateur 189 October 30, 2022 09:38AM

Experimenting with your own equipment

UtahRich 192 October 28, 2022 10:42AM

Re: Experimenting with your own equipment

nwdetectorist 171 October 31, 2022 08:49PM

Rich, there is another way to deal with cell phone EMI.

Monte 208 October 29, 2022 10:43AM

Re: Rich, there is another way to deal with cell phone EMI.

jmaryt 165 October 29, 2022 07:20PM

Re: Experimenting with your own equipment

GB_Amateur 176 October 29, 2022 09:46AM

Re: Experimenting with your own equipment

Monte 189 October 29, 2022 10:52AM

Great response.

UtahRich 202 October 27, 2022 04:12PM

Re: It looks like what?

FeistyFrank 185 October 27, 2022 02:44PM

Re: It looks like what?

Geotech 186 October 28, 2022 10:15AM

Thank You, Carl.. Appreciated by many. N/T

Monte 145 October 29, 2022 10:54AM

Re: It looks like what?

FeistyFrank 170 October 28, 2022 11:10AM

Re: It looks like what?

jmaryt 173 October 23, 2022 07:52PM

Descriptions can be confusing. confused smiley

Monte 182 October 24, 2022 12:57PM

Re: Descriptions can be confusing. confused smiley

jmaryt 186 October 24, 2022 06:03PM

j.t., as UtahRich said ... No worries.

Monte 227 October 25, 2022 05:21AM

Re: j.t., as UtahRich said ... No worries.

jmaryt 272 October 25, 2022 05:07PM

Re: Descriptions can be confusing. confused smiley

UtahRich 189 October 24, 2022 07:54PM

Re: Descriptions can be confusing. confused smiley

jmaryt 194 October 25, 2022 05:13PM

Sunrise . . . . sunset . . . .

UtahRich 185 October 26, 2022 01:12AM

Re: Sunrise . . . . sunset . . . .

jmaryt 170 October 26, 2022 06:20PM

Or is that Snow Fal .... Snow Melt ....

Monte 168 October 26, 2022 01:29PM

A better description?

UtahRich 189 October 23, 2022 09:05PM

Rich, I am looking for Carl's post. N/T

Monte 195 October 23, 2022 07:09PM

Yes, the topic can create some interesting discussions.

Monte 190 October 22, 2022 02:35PM



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