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Another question...Getting major depth and good ID using the 10" elliptical coil...

REVIER

Well-known member
There is a question here...if you don't want to read it all just skip to the Bottom, please.

Maybe somewhere around 20 hours with the new F70 so far and I am getting the hang of it pretty quickly thanks to my huge huge amount of experience with the F2.
A big part of the Fisher language is totally transferable from one to the other, but the F70 does have way more power and a ton more settings available so the language is richer and I am having much fun learning this new and extra part of that language that the F2 lacked.
Target behavior is still kind of a mystery to me when it comes to the real deep stuff because of my lack of experience at these levels so I know there is still much more to learn if I hope to become even close to as fluent as I have with the F2 language, and for me time spent learning is great fun no matter how long it takes.

I can't complain, with only 10 hours on the F70 with the standard elliptical I managed to find lots of clad, tiny silver at 6" and a nice gold ring all in pretty trashy areas for the most part.

Through a very generous gift from a member on another forum I also have a few hours under my belt with both an 11" DD coil and a 5" concentric sniper.
These coils were used, abused, repaired with a ton of JB Weld and look like hell but seem to work fine, so I am grateful and happy I have a decent and pretty complete set of tools at my disposal.

As far as this tool selection I am a big fan of using the right tool for the right job so over time I plan on getting good at all of them...eventually.
I have been told that since I have the 11" DD and the 5" sniper I can all but retire my 10" elliptical, but I know me and this will not happen right away, if at all, and that is mostly because I really liked using this coil in the short time I have spent with it.
No experience using this type of concentric in the past at all, but I found that for me it does seem to work well in both the wide open and even in very trashy areas...exactly the type of area I found that gold ring really, really close to another piece of trash.
It seems to have the ability to go pretty deep plus great target separation and even though it is said the DD can snake through trash very well I still at this point seem to get along better at these type of sites using the 10" because the close proximity of multiple targets at some of my sites still puts more of them under the scanning field of the DD coil than the smaller field of the DD.
I can figure this stuff out using both coils but right now with my limited experience on the F70 using the 10" coil vs the 11" DD for me is faster.
I have a lot of experience using an even larger 12" DD coil on my Vaq so I know these type of coils, understand them, can pinpoint with them easily and can use them even in the most trashy sites or go deep to find good targets...but over all I just like using concentrics better...always have.
Just different strokes for different folks.
I have a huge amount of experience using the snipers and if I am going to be spending a lot of time at super trashy sites that will be my go-to coil for all that type of work, of course, but sometimes I do hunt some wide open areas with less trash but still wander over to some more trash packed sites from time to time and I just don't have the time or patience to change coils when I hunt.
I bring extra coils with me but I might be so far away from my truck I just never seem to want to walk back to change them, as easy and quick as coil changes are on the F70.
I usually just mount one and go with it for the entire session and deal with whatever situation I come across the best I can.

So now you guys don't have to tell me that the 11"DD is deeper, or how well the 5" concentric works and how it will also go deep with the right settings.
I have these coils and will use them and overtime I expect to get quite good with them and it might happen that I will eventually use that large DD coil more than the 10"...but for now I want to concentrate on using the 10" coil at a specific site I have in mind so I am looking for advice using that one.
Again, I go back to my sites over and over so all the coils will get a chance, but this first time I am planning on using only the 10" elliptical.
I know this coil can still go pretty deep, and I am willing to give up those few extra inches the DD coil could get me according to most experienced users at this time if that is indeed the case.
The extra depth will probably not matter at this particular site I am hot to hunt in in the near future, anyway.

The deepest target I have dug so far with the 10" was a beaver tail tab at a full 10"...maybe even 11"...I did not get an exact measurement at the time.
I can't remember the settings but the thresh was into the negative numbers, the sense was probably somewhere in the 70-80 range, disc was at 1 and I was using 4H tones...my favorite tone settings at this time.
This deep target was not ID'd correctly at all, it was a very solid and repeating but only from one way hit, switching to SL did not make the signal any better from any direction, and there were never any numbers at all on the screen as I swung over this thing at any time, it was like the F70 didn't even want to hazard a guess.
I knew something was down there, using the pinpoint the number 10 did show on the screen from at least 2 directions, and the only reason I even dug this thing was to see what kind of target would cause this behavior and to see if there actually was something that deep...and I was pleasantly surprised that there was even if it was only trash.

So even though the ID was not the greatest I now know that the F70 using this coil can reach great depths and maybe using different setting could have ID'd this thing even better, but I did not have the patience to try different settings at the time to see if it could.

This site that I am aiming at has a few things going for it and a few things going against it.
It is in a very old park, parts of it dating back to 1896.
The area I am aiming at, a couple of different areas, actually but similar, are actually large hills, (small mountains?), that start at the lower levels of the park where some streets and picnic areas are and rise up to about the 800' level and I have been here before on 2 different hills across the street from each other.
One hill is now used for bike trails that have been carved in and around this thing and in the past was well used as horse trails for recreational use back in the early days and had some camping areas closer to the top of this hill somewhere.
Also there have been people tromping around all over the area because I have found some pretty old trash like actual tin and steel cans and can slaw and some old bottles and other trash that dates back to the beginning of the last century.

Across the street on the other hill I hunted one time and no horse or bike trails here but I believe this site has been used by scouts and maybe even actual army soldiers for training maneuvers in the distant past and also has some very old trash scattered about among other things like a pretty old full sized scout pocket knife I did find that had years and years of rust built up on the exposed metal parts...many decades of rust by my reckoning.

I did find a few coins on both sides but modern stuff and that is not my goal.
A friend from my MD club has been up on these mountains and using his E Trac has found silver...some Merks and even a few Barbers and that is the coin I am hot to find with my new detectors and the first of my short term goals I have set for myself.
Those coins are not easy to find but they are up there and I want my share.
I have aimed to become a good jewelry hunter and I think I have achieved that goal, now I want to get good enough with the F70 to be known as "the coin guy" and I don't care how long it takes me to learn new skills to do this.

Ok, the site and it's history is the good part, this is the bad.
Climbing up these things is nowhere as easy as hunting my normal level parks and I ain't no spring chicken...but I do take my time and hunt slowly as I climb along the way.
Also the thick leaves that protect the ground and make for easy digging in the not frozen soil of my other more open sites is great except for the fact that if you happen to lose your Lesche digger in that stuff you will have a hard time finding it even with that bright colored handle...something that happened to me the last time I drug my butt up one of these mountains.
I found it eventually but I was lucky and wasted a lot of time doing it.

The other problem is unusually heavy EMI and we all know the Fishers just love to home in on that stuff and then tell you about it.
The Vaq I used once had no problem on the way up and even near the top on one hunt, but my F2 was pretty cool till I reached close to the top level and then that became one of the only times I have ever hunted with it that it became almost unusable.
Only on the lowest sense setting could I deal with the huge amount of noise and at that point the depth, especially using the sniper coil I had mounted at the time, was probably not good enough to reach those older silver coins.
At the top I discovered that I was pretty much within a straight line of site with no structures between my F2 and every friggin radio, TV and cell tower for miles around.

My friend says those coins he found were not all that super deep but I do figure I need to get at least 6-8" to have a shot at finding them...more would be great and even better if I can set up the F70 to do it.


Here is the question for those that want to answer me but did not want to read all the garbage above because you actually have lives...


So disregarding the unusually heavy EMI problem which I will deal with and adjust any of your suggested settings I will try if needed, just what would you suggest would be the best way to attack these large hills and get the best depth and ID on targets using the 10" elliptical coil only, at this time?
My soil is usually very mild, I ground balance in the low 50's most of the time with only one bar showing on the soil reading, if that.

I assume the highest thresh settings into the positive numbers and high as I can go on the sense would be suggested here, but maybe not.
Anything you want to tell me about the tones would be fine, also.
I understand 2F might be the way to go for depth and the least amount of chatter but you might think different.
Disc settings too, almost nothing or way up there, either is fine as long as you believe your combination of setting will help me find that first Barber.

I will try all combinations of setting suggestions if time allows and report back on my results.
Hopefully with a nice piece of round silver to accompany that future post.

Thanks all!
 
Hah! :rofl: You sure can write! Keep it coming, you are doing a great service to the F70 community with this kind of dialog and proper research, plus, what else are we gonna talk about for a few months?...that said, the dealer who sold me the 70 said to get the 11" dd...he was not suggesting, he was TELLING...said its like dropping a hemi in a Ford Ranger...said it throws a rectangle deep signal as opposed to a cone....said you can flat out fly with the thing..said, since you now have a hemi under the hood, you have to be careful with the throttle (sens), or you will overpower yourself, lose control, fly up through the wire and into the grandstands, make a hell of a mess and get banned from the track!.:rofl:..I tried the 10" for one day then sold it, probably did not give it a fair shake out, did find a nice silver chain with it that day, but I would have found it with the 11" no prob...so for me, throwing a fast rectangular signal helps me cover more ground..sure it takes a keen ear to hear those pips on the fringe and resweep...I dont know if this helps, the local dealer I bought it from was a very cool old guy, he sure was not trying to upsell me at all..and he could have since I did not know dink and had no idea what he was talking about most of the time..full confidence here with the 11"dd...dont know if the 10 concentric would add or detract from it.

I will ask if you can hop this 10" coil over a target to Pinpoint? Without using the PP button, With the 11" dd, a fellow simply taps it on top of a target to locate it in a gentle but brisk jigging fashion, like a snare drum or jigging gills through the ice..rapid vertical hops (as opposed to side to side tight wiggles) right on top to signal strength..tells you where and how deep the target is by sound alone...I dont know if this works with a 10" concentric, or if this is a performance anomaly associated with dd coils? Regardless, you should really like this method of pinpointing for the dirt work you like to do...:thumbup:
Mud
 
Yea, I read that from you in a previous post and that is good stuff as always.
Not so necessary in using the 10" coil, the regular ways I pinpoint are fast and laser-like but I will try the hop sometime and see.

I am awful glad I have that 11" DD coil, I hear and understand all that tell of its power and abilities far beyond those of mortal coils and it will get it's turn at this site and many others, but I am still glad I have the strange shaped concentric, too.
Sometimes I am not so interested in raw power as much as a combination of power and finesse, and the way I hunt at the sites I usually hunt concentrics just work better, or at least are more fun for me to use most of the time.
At this time at this site the 10" coil is what I am gonna use and I still expect great things from it from what I have seen in the few hours spent with it so far.

Dealers are great and most of them know much but they don't know me or hunt with me at my sites.
So many hunters had the F2 before me and got them after and even though it has been said many times all over the place and repeatedly that sniper coils are the way to go in trash, many never heard that, maybe never understood that or never even tried them and actually sold them before even giving them a chance.
Then I come along and in just a few hunts using one started to realize just how good that small hockey puck of a coil really is and what it can do when you really learn how and where to use it.
I don't like to brag, oh heck that is a big fat lie I love to brag when deserved and called for, but after I started posting about how I used mine and showed what I was finding with it this little forgotten coil all of a sudden became more popular with many owners digging them out and knocking the dust off of them, and others ordering them and then thanking me because what I discovered they began to discover too, and now these things are a little more popular than before according to what I read and the thanks I got for getting the word out even more than it was before.

I am or I am trying to be an all around hunter and I use many machines and many coils in my journeys and this 10" coil is going to be one of them.
Maybe an important one or maybe one I will put away for limited use or never use it again and that still remains to be seen, but I will tell you it will be used and I am going to try to get the best out of it I possibly can before I make any decisions one way or another.
Who knows, I might just unlock a secret or two that may surprise all of us.
 
You gosh darn tootin! :thumbup: You got to brag a little! Results speak for themselves, and buddy, you've piled up the results! A fellow has to go on and just drop a brag when its backed up with finds!:rofl: I keep saying I want a sniper coil, but for some reason I just keep using the 11"dd and try to use it as a sniper in the trash...the more I study and read, this sport truly is all about the indian and not so much about the bow...now you take an educated indian with a solid knowledge about what the bow can do, accessories available etc. and look out!

We have some high hopes for you unlocking some secrets for us with this F70 Revier, you proved a powerful point with the F2, so I just hope you are as satisfied and find just as much or more with the 70....for certain, a guy just cant mount a serious argument against your hunting style...you like finesse? You tighten up that 11"dd, drop sens into the low 50's, and start coil hopping and you will be kissing my butt! :rofl: I may just make it my 2014 goal to give you a good old fashioned dirt gold hunt rogering since we now swing the same machine!:rofl:
Mud
 
mudpuppy said:
You gosh darn tootin! :thumbup: You got to brag a little! Results speak for themselves, and buddy, you've piled up the results! A fellow has to go on and just drop a brag when its backed up with finds!:rofl: I keep saying I want a sniper coil, but for some reason I just keep using the 11"dd and try to use it as a sniper in the trash...the more I study and read, this sport truly is all about the indian and not so much about the bow...now you take an educated indian with a solid knowledge about what the bow can do, accessories available etc. and look out!

We have some high hopes for you unlocking some secrets for us with this F70 Revier, you proved a powerful point with the F2, so I just hope you are as satisfied and find just as much or more with the 70....for certain, a guy just cant mount a serious argument against your hunting style...you like finesse? You tighten up that 11"dd, drop sens into the low 50's, and start coil hopping and you will be kissing my butt! :rofl: I may just make it my 2014 goal to give you a good old fashioned dirt gold hunt rogering since we now swing the same machine!:rofl:
Mud


Kissing your butt?
I like that confidence, and if you are right about the 11"DD, (and your dealer), then I am already beginning the moisturizer cream treatment on my lips for you.
On the other hand if I am able to put that 10" coil to good use, discover a few hidden talents and put the reputation of this coil into an even better light, you might want to do something for me.
I always have that 11" DD to use, and I have no idea what I can do with this other coil yet and it might ultimately be nothing, but I have a little confidence too so if you would please get ready to snack on a little meal that I will personally supply at no cost to you what so ever.
 
OUTSTANDING! :rofl::rofl::buds: My chapped butt prefers Burts Bees lipbalm..:rofl:

.Listen you!...one of these days if'n I ever happen to be in Kansas or wherever the heck it is you are at in flyover country...me and you are gonna have a real F70 shootout!:rofl: You keep that 10, and go ahead and dink around with your notching and ciphering and all, meanwhile, I'll fire 'er up, and go! be pulling gold and silver and clad, before you even scroll through to tones! I will be having to dump my pouch before you even have your headphones on! :rofl:

You already know I cuss your name everytime I dig a rotten zinc penny hoping for a big gold ring, so I really do owe you one! I bet it would be one hell of a shootout, I dont like to brag, especially about things I havn't done yet...but I'm pretty damn good with this 70, super fast retrieval, and I doubt you are any match for me! Still, I welcome the challenge and the comraderie! Hah! :beers: Now, if we could get a battalion group of 70 users together and crash a Minelab club hunt, ...we would seriously frost their biscuit like a french pastry chef, and send them home in tears like a schoolgirl who's daddy was not rich enough to buy them Miley Cyrus tickets !
Mud

full disclosure: (this damn REVIER sure can find the gold....hope my alligator mouth did not overshoot my chickadee @ss once again)
 
Kansas...my state is Kansas.
You know, he wasn't born here but it is still the exact same state where Superman grew up and learned to use all of his super powers to their full potential.

Rumor is he might have more close relatives around here with a much lower proile.

Come over for a visit anytime you like...earthling.
 
That's 10" elliptical not concentric:nono:
Bart's Big Boy Hobbies has good things to say about it and I would be afraid to take mine off before I am confident I know everything there is to know about it. And by the way, if the BS gets any deeper I'm gonna have to roll my pant cuffs up a couple turns:laugh:
 
OK...So you did right well in Alabammy with the F2 in that red iron dirt and all, (mega props for that!:thumbup:) and you for sure knocked the stink out of it in the deep black of Kansas...(give you that too:please:)
Not saying you cant whoop my rear end right proper in a fair fight, just saying you will know you were in one heck of a battle in the process!:rofl (and, I dont fight fair If I can help it!):

Perhaps we should meet in the middle? Like ransack the parks and beaches of Illinois? or even Iowa? Or, if a guy is desperate, even Missouri?:rofl:

I've got a little REVIER Kryptonite up my sleeve, been watching you man...I bet a dollar if I toss out a handful of zinc pennys you will be so enamored with those signals and going after those targets with your propointer that you dont make it into the the killing fields!...Superman is from Kansas? So is Dorothy, and within an half hour hunting against me you will be clicking your heels together wishing for Auntie Em and home!....I'm pretty sure I will find you sucking your thumb in the cab of the truck after I get done sweeping a field...not braggin', just sayin'
Mud
 
Oh it is so on...
It it actually oner than on.
The gauntlet is thrown, the cheeks have been slapped, hide the kidz because the rumble in the jungle is nothing compared to what is to come.
You know me and a little of what I can accomplish once I set a goal.
Let us meet back here on 12/31/14 and compare finds.
Winner, winner chicken dinner!
I like mine fried with a little homemade cole slaw and potato salad on the side.
Make a note.
:starwars:

Oh, by the way.
All that experience you have with yours that I don't have with mine...
Feel free to take advantage of that.
I am a fast learner so not so advantageous as you might be led to believe.
Also feel free to cheat a little if you feel you have to.
Somewhere around October is probably the time you will seriously start to consider doing something like that, I would expect.
 
Roll up your pants IB, and drop yours REVIER!

Its on like Donkey Kong!

Lets see, pencil it in on the free calendar I got from the bank...whatcha wanna call it? Mega clad or gold? Mixture of the both? Of course to be fair you know I'm fit as a freakin' fiddle, no puddle in the middle, ready to rock the F70 Casbah with a hey diddle diddle!...I will even tie one battery behind my back and hunt you with three, I'll use a shortened stabber just to give you a chance, and only hunt during the week! :rofl: You lose your propointer and tiling spade and try to keep up!
Mud
 
IBdiggin said:
That's 10" elliptical not concentric:nono:
Bart's Big Boy Hobbies has good things to say about it and I would be afraid to take mine off before I am confident I know everything there is to know about it. And by the way, if the BS gets any deeper I'm gonna have to roll my pant cuffs up a couple turns:laugh:

Elliptical, concentric...whatever.
It looks funny but seems to work good and it's best use might turn out to be to kick someone's arse in 2014.
 
Some info on this coil.
A concentric coil...just squished.
Not quite the long scanning field of a DD but a little longer than a round coil.
I like it.
Good ground coverage and a decent size "sweet spot" so I don't miss much if I overlap correctly.
Also better on bottle caps.
What's not to love?

Elliptical Coil
This style of coil also gets its name from the shape of the coil. Instead of the round shape of the concentric coil, it is merely has elliptical shape. Now if the coils are different only in shape, you are probably thinking why would one want to buy an elliptical coil over the concentric coil?


Let
 
This may be of interest...a few years back I had an idea to use the 5"dd in conjunction with the 11"dd...I talked to Ralph at Sunray since he makes those probes with the 2 way switch junction box..he said he could easily make me a modified 2 way switch and instead of the inline probe being attached, there would be two female coil connector plugs...then, a guy would plug in his main coil, and also plug in the sniper...the sniper would be on its own wand, while the main coil would be connected like usual to the lower shaft....the idea being a fellow could keep the sniper wand set up inert, and sweep with the big coil like normal, but if the situation merited, like in a totlot near the poles, or along side a fence or parking lot edge, or heavy trash near school entrances,, instead of stopping and changing coils, with the flick of a switch the sniper would be activated, and the main coil inert...See? Exactly like how an inline probe works, but instead of the probe, you have a coil! When not deployed, the sniper and its wand would be out of the way poked through a belt loop, or snapped onto the main shaft horizontally so its not in the way... or something like that....Anyway, I did not pursue this plan, and have not purchased the 5" yet....

Saying all this to say that this set up would be a great way to check the differences between two coils on a real world target in a very speedy manner...instead of changing coils, flip the switch, resweep target with alternate coil......

To continue this crazy line of thought, I suppose a fellow could have a 3 way switch, so that either one coil is hot, or the other, or BOTH! Can you imagine what kind a ground a guy could cover with TWO 11" dd's on the same machine, both hot, one in each hand? Sure when you hit a target you would not know which coil hit it, but by simply raising one coil off the ground, and checking the area with the other, it would theoretically work... No I have not started drinking yet this am!:rofl: I was last night though...I see I picked a fight with REVIER, not a wise move at all!:stretcher: Why didnt one of y'all hold me back?
Mud
 
Oh the walk of shame:surprised:---------------I remember those. Ooooh I'm sure you will make up and all will be well:cheekkiss:
But seriously folks. Everyone tries to justify their reasoning for the larger coil as the ability to cover more ground. Seems to me when people state "you can ever totally clean out any good site" that the true treasures would be found by better analysis and slowing down with better discrimination
 
IBdiggin said:
Oh the walk of shame:surprised:---------------I remember those. Ooooh I'm sure you will make up and all will be well:cheekkiss:
But seriously folks. Everyone tries to justify their reasoning for the larger coil as the ability to cover more ground. Seems to me when people state "you can ever totally clean out any good site" that the true treasures would be found by better analysis and slowing down with better discrimination


mudpuppy said:
full disclosure: (this damn REVIER sure can find the gold....hope my alligator mouth did not overshoot my chickadee @ss once again)
I see I picked a fight with REVIER, not a wise move at all!:stretcher: Why didnt one of y'all hold me back?

A little food for thought, mud buddy...
Just about everything I found in the last year was with the F2 and the sniper coil and just about everything was at 5" or less...4" or less, really.
Even the 1865 2 cent and some other older silver coins were all pretty shallow, too.
All the gold was all shallow for sure, and you know I like the shiny stuff most of all.

Now with the F70 using any coil I wish and even throttling back the settings to nothing I believe I can get deeper than that, easily.
Just by going back to all my old sites I have a whole new world to search...a realm with goodies that I didn't see, didn't even know were there and didn't bother to dig...and I still did pretty good despite that.
That deeper realm is now available to me and open for business.
Got some new choice spots to try in 2014, too.

Yea, they should have held you back.:rage:
Too late now...379 days and counting....
 
Ouch! not so loud....! Yeah, you are going to really kill 2014 I think..I need some new paydirt here or come up with some sort of strategy...I've really covered this 20mile radius pretty heavy...well, I think I will redouble my efforts on chains of the golden sort...even if somebody else ever got a coil over top, they may have dismissed the signal as trash...I prefer to hunt the dirt, but here i am right up on miles of open sand and get sidetracked nearly all summer sweeping beaches....I'll do some research and a few exploratory runs this winter, even if a guy cant dig, he can FIND, and then come back in the Spring in a whirlwind tour of ransackery...
Mud
 
IBdiggin said:
Some interesting reading
http://nexusdetectors.com/sciencemetaldetectors.html

Yes, very interesting...thanks.
 
mudpuppy said:
Ouch! not so loud....! Yeah, you are going to really kill 2014 I think..I need some new paydirt here or come up with some sort of strategy...I've really covered this 20mile radius pretty heavy...well, I think I will redouble my efforts on chains of the golden sort...even if somebody else ever got a coil over top, they may have dismissed the signal as trash...


You want chains?
Better study up on Eddy currents because those that understand this have a better shot at finding them.
Chains are weird, and so are rings that are broken or open and will never come in like you think they should because of this Eddy current thing.


Even though you are now my arch enemy, I am still a nice guy and want to help....

When a piece of metal comes across the electro-
magnetic field transmitted by the TX loop some
amount of Eddy currents will occur in the moment
of crossing the transmitted field. The Eddy
currents in the metal piece will cause an electro-
magnetic field



When using a detector, and this varies greatly between what methods your detector uses, it creates a magnetic field that shoots into the ground. As you pass over a metal object, let's say a coin for now, it creates an electric current in that item. This current is called an Eddy Current. This current moves throughout the coin and creates its own magnetic field. This field is what the detector coil sees and interprets. It then takes all the input and either beeps a certain way, shows on a screen or both.

Now to the matter of different size, shape and wadding of items. These Eddy Currents flow differently depending on the items conductivity. Coins, nails, pull tabs, etc, have varied levels of conductivity and the detector usually reads them as what they are, but, if you change the shape of these items, say if a silver ring is not a "full" ring, or a is an unclasped silver necklace, or a peice of foil is wadded tightly, it will change the conductivity of that object. Not the conductivity of the metal mind you, just the way the current travels through the actual item.

To put it simply, lets say you have a full silver ring (a full O shape) and a silver ring that does not connect fully (basically a C shape), when the electric current passes through the full ring, it is able to travel in all directions easily, versus the incomplete ring, where it loses some current out of the broken ends.





It's the physics. The magnetic field generated by the Eddy currents induced by the transmit coil on the targets are very small in the case of a chain. Basically, because of the contact resistance between each link is relatively high, the Eddy currents are each confined to a single link in the chain. So, each small link in effect becomes a target. Because each link is small, it can't generate a large field for the receive coil to detect. Also, the links are pointing in somewhat different directions, so their individual magnetic fields don't readily add up to a larger field which would make for easier detection.

For the above reasons, chains are hard to detect. What usually "give them away" is an attached medal, or a sturdily built clasp.




I asked about this awhile ago, studied up and got pretty good at understanding this stuff.
Enough to find way more than my quota of silver and gold chains...and a few open pieces of jewelry.

https://www.youtube.com/watch?v=ImKxZve5KGw
 
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