Some here’s have said VLF detector tech has reached its limits

tnsharpshooter said:

I was referring more to frequency used with device. I don’t know the answer. Does fcc regulate frequency?
I can understand where a device would conflict with other devices. Might even open up a bank vault. Who knows.

Click to expand...

To elaborate on the previous statement, the FCC, through 47 CFR § 15.5, regulates what are known as "Part 15" devices. These are unlicensed electronics, which need to adhere to regulations to avoid the risk of interfering with other devices. As such, metal detectors fall under Part 15, just as DC motors do as well because the spark from the motor brushes can produce unintended RFI.

Now, to answer your specific question, currently only frequency bands between 9 KHz and 275 GHz have been allocated (i.e., designated for use by one or more terrestrial or space radio communication). So, 9 KHz is the lowest frequency regulated by the FCC.

Understand that this frequency regulation is in reference to "electromagnetic waves". The metal detector coil is very good at producing a magnetic field, but NOT good at all to produce an electromagnetic wave that would propagate over relatively long distances. That is why detectors spaced five to 10 feet away don't interfere with each other.

Detector said:

You can always add more mirrors to your car to improve backing up, but they will not make your car go any faster,


VLF I'm sure has more tricks up its sleeve, but I don't believe more depth is one of them. That is where most believe VLF technology has hit a wall. I have to agree. Not in 20 years have we seen any gain in depth. And not the idea that new tech makes so in a site I was only getting 5" and now I get 7", but raw depth where it really counts.

Click to expand...

You have heard this from me before.....

I disagree. I am not discounting your experience. You just haven't had mine where the ground is full of magnetite particles and fills up a Deus 1 or Deus 2 mineralization graph.

Let's take what many still believe to be three of the finest powerhouse single frequency detectors ever made = original Deus, F75 and MXT Pro. Where I detect even with the biggest coil available for them......3" of useable depth as far as any kind of accurate target ID and 6 to 7" of overall depth. That's it. No need for large coils with these detectors where I live. The smallest coil available did just as well on target ID accuracy and depth. Even great SMF detectors like the V3i, Etrac and CTX......same story with limited depth overall and very poor target ID accuracy even on coin sized targets deeper than 4". I am not making this up...

Then come the Equinox, Vanquish, Deus 2 and Legend, with easily down to at least 8" of target ID accuracy and 10 to 12" of overall depth on coin sized objects.

Seriously, before the Equinox was released I was about to just call it quits. It was so frustrating to use supposedly great detectors where I live and just find their performance to be a complete joke and nothing like what was being reported elsewhere. I might as well have just been using a very expensive PI detector and given up on VLFs except for recent drops or very shallow gold nugget prospecting....good luck with that.

Those detectors like the Equinox have also rejuvenated many saltwater beach hunter's detecting enthusiasm too.

Obviously, I am not the only person that was having this issue with single frequency detectors. Otherwise, all of these manufacturers would have just pulled the plug on anymore VLF R&D. Thankfully, more people than me were demanding better and we got it.

Rudy said:

To elaborate on the previous statement, the FCC, through 47 CFR § 15.5, regulates what are known as "Part 15" devices. These are unlicensed electronics, which need to adhere to regulations to avoid the risk of interfering with other devices. As such, metal detectors fall under Part 15, just as DC motors do as well because the spark from the motor brushes can produce unintended RFI.

Now, to answer your specific question, currently only frequency bands between 9 KHz and 275 GHz have been allocated (i.e., designated for use by one or more terrestrial or space radio communication). So, 9 KHz is the lowest frequency regulated by the FCC.

Understand that this frequency regulation is in reference to "electromagnetic waves". The metal detector coil is very good at producing a magnetic field, but NOT good at all to produce an electromagnetic wave that would propagate over relatively long distances. That is why detectors spaced five to 10 feet away don't interfere with each other.

Click to expand...

Very good info Rudy. Thanks.

tnsharpshooter said:

Truth be told. Using audio alone to human ear pute limits on actual VLF ops.
A signal if given has to be so long (audio wise) for human ear to hear. Wonder if a detector can actually be detecting a nonferous (circutry) sees it. Yet tonal presentation presented human ear can’t discern. This could be aggravated by VLF detector ops how it behaves in the actual detecting situation in iron.

A VLF detector could be actually misengineered where as detector is seeing nonferrous yet from audio standpoint detector fails to give audio or enough audio to user.

Click to expand...

Your last sentence….this HAS happened in the case of the CTX. It says right in the manual that while using Ferrous Coin target separation, an indication of a non ferrous item might appear on the screen while there is a complete absence of corresponding audio. How annoying is THAT? A person would have to hunt with their eyes locked onto the screen, which isn’t something 99.9999% of people are going to do. Well, at least I’m not.

IDXMonster said:

Your last sentence….this HAS happened in the case of the CTX. It says right in the manual that while using Ferrous Coin target separation, an indication of a non ferrous item might appear on the screen while there is a complete absence of corresponding audio. How annoying is THAT? A person would have to hunt with their eyes locked onto the screen, which isn’t something 99.9999% of people are going to do. Well, at least I’m not.

Click to expand...

Yep. I event thought of that when I was typing what I did. I had 2 CTX maxhines.

jmaclen said:

You have heard this from me before.....

I disagree. I am not discounting your experience. You just haven't had mine where the ground is full of magnetite particles and fills up a Deus 1 or Deus 2 mineralization graph.

Let's take what many still believe to be three of the finest powerhouse single frequency detectors ever made = original Deus, F75 and MXT Pro. Where I detect even with the biggest coil available for them......3" of useable depth as far as any kind of accurate target ID and 6 to 7" of overall depth. That's it. No need for large coils with these detectors where I live. The smallest coil available did just as well on target ID accuracy and depth. Even great SMF detectors like the V3i, Etrac and CTX......same story with limited depth overall and very poor target ID accuracy even on coin sized targets deeper than 4". I am not making this up...

Then come the Equinox, Vanquish, Deus 2 and Legend, with easily down to at least 8" of target ID accuracy and 10 to 12" of overall depth on coin sized objects.

Seriously, before the Equinox was released I was about to just call it quits. It was so frustrating to use supposedly great detectors where I live and just find their performance to be a complete joke and nothing like what was being reported elsewhere. I might as well have just been using a very expensive PI detector and given up on VLFs except for recent drops or very shallow gold nugget prospecting....good luck with that.

Those detectors like the Equinox have also rejuvenated many saltwater beach hunter's detecting enthusiasm too.

Obviously, I am not the only person that was having this issue with single frequency detectors. Otherwise, all of these manufacturers would have just pulled the plug on anymore VLF R&D. Thankfully, more people than me were demanding better and we got it.

Click to expand...

Well I can't attest to the Deus II or Legend, but I had several Equinox 800s neither of which, in my use, came close to the raw depth of my E-Trac. Also can't say for saltwater because I've never been there. I go a lot off the videos I watch and I have yet to see anyone say man this Deus II/Legend is so much deeper than my XXXXXX. I believe IF it were so, there would be many videos showing the fact.

Again, I can say depth is relative to conditions so there are many cases where extremely bad soil will allow the new SMF tech to get you more depth at that location, but 10"-12" is about this limit no matter the conditions, and it hasn't improved in 20 years.

Change my mind. Show just one video that says otherwise.

As has been shown, and I've known for many years, not only is there a power limit, but saturation begins to make more power useless anyway. VLF has just reached its limits in my opinion.

It was also said many years ago that Pulse Induction was the future tech in detectors. If I remember right, at one point, someone had a so called PI discriminator. Obviously, it never worked out.

I have the perfect test bed for depth. A 130+ year old park with a long history and a nice flat area where I know for a fact coins exist on a tapered range of 80 yards from 5" to at least 24". The deepest have come to light from the E-Trac. With the Equinox, I pulled nothing below 8" in the same area. ID ability was not as good as the E-Trac. To be honest, I haven't really seen videos that tell me the Legend or Deus II would do any better.

tnsharpshooter said:

Yep. I event thought of that when I was typing what I did. I had 2 CTX maxhines.

Click to expand...

You’re eTrac video has me a bit worried with the differences in Response options…the question is, how bad is it? I think we’ve all hunted places with SCORES of nails of all kinds, and that test doesn’t exactly instill confidence in ANY of my FBS stuff right now, especially hunting those places. How easily the D2 hits a small coin between 2 very closely placed nails in CD’s video is pretty astonishing, to say the least. At some point, it is what it is, is it not? Tribalism, stubbornness, brand loyalty…none of that changes evidence. Perhaps FBS does have a fatal flaw.

IDXMonster said:

You’re eTrac video has me a bit worried with the differences in Response options…the question is, how bad is it? I think we’ve all hunted places with SCORES of nails of all kinds, and that test doesn’t exactly instill confidence in ANY of my FBS stuff right now, especially hunting those places. How easily the D2 hits a small coin between 2 very closely placed nails in CD’s video is pretty astonishing, to say the least. At some point, it is what it is, is it not? Tribalism, stubbornness, brand loyalty…none of that changes evidence. Perhaps FBS does have a fatal flaw.

Click to expand...

Well.
Maybe it is safe to say some Etrac users revisiting sites and making additional finds. Maybe this is one reason why. They approached iron from better direction hence got signal or a more robust signal. Seems there are work around somewhat using smooth and long tones. But using them could be more problematic by the way they behave. It is obvious now. Adding nonferous coin to nail (beside) drives up Etrac ferrous number hence I reckon part of the reason why normal tones struggles. Quite amazing to see how close together 2 coins can be with one nail and all is silent when sweeping.
Maybe I should do this test with deus 2. Who knows maybe it will struggle too.

tnsharpshooter said:

Well.
Maybe it is safe to say some Etrac users revisiting sites and making additional finds. Maybe this is one reason why. They approached iron from better direction hence got signal or a more robust signal. Seems there are work around somewhat using smooth and long tones. But using them could be more problematic by the way they behave. It is obvious now. Adding nonferous coin to nail (beside) drives up Etrac ferrous number hence I reckon part of the reason why normal tones struggles. Quite amazing to see how close together 2 coins can be with one nail and all is silent when sweeping.
Maybe I should do this test with deus 2. Who knows maybe it will struggle too.

Click to expand...

That was going to be my next question…what happens with other machines on those scenarios? Different coils? When and if you have time….

On the matter of hearing very deep quite targets or latency caused using Blue-tooth I have at times used a pair of audiophile type wired headphones. It depends on the situation. I don't use them a lot, but if the stuff I am looking for is deep I do use them. Mine are Awia ARC-1's.

Detector we've discussed your park before. I personally have never seen an Etrac out depth an Equinox. To bad you live so far away I'd like to try your park. I know you know what your talking about, but I'd still like to see with my own eyes. It has to be the dirt differences.

IDXMonster said:

That was going to be my next question…what happens with other machines on those scenarios? Different coils? When and if you have time….

Click to expand...

For yours truly.
Video I did very similar to test I did checking Normal tones use on Minelab Etrac.
This video I checked Equinox 800 and Xp Deus 2. Both detectors wearing 11” coils.
Enjoy.
https://m.youtube.com/watch?v=UMg0rjZEgeI

Detector said:

Well I can't attest to the Deus II or Legend, but I had several Equinox 800s neither of which, in my use, came close to the raw depth of my E-Trac. Also can't say for saltwater because I've never been there. I go a lot off the videos I watch and I have yet to see anyone say man this Deus II/Legend is so much deeper than my XXXXXX. I believe IF it were so, there would be many videos showing the fact.

Again, I can say depth is relative to conditions so there are many cases where extremely bad soil will allow the new SMF tech to get you more depth at that location, but 10"-12" is about this limit no matter the conditions, and it hasn't improved in 20 years.

Change my mind. Show just one video that says otherwise.

As has been shown, and I've known for many years, not only is there a power limit, but saturation begins to make more power useless anyway. VLF has just reached its limits in my opinion.

It was also said many years ago that Pulse Induction was the future tech in detectors. If I remember right, at one point, someone had a so called PI discriminator. Obviously, it never worked out.

I have the perfect test bed for depth. A 130+ year old park with a long history and a nice flat area where I know for a fact coins exist on a tapered range of 80 yards from 5" to at least 24". The deepest have come to light from the E-Trac. With the Equinox, I pulled nothing below 8" in the same area. ID ability was not as good as the E-Trac. To be honest, I haven't really seen videos that tell me the Legend or Deus II would do any better.

Click to expand...

First, the topic is "Some here believe that VLF detector tech has reached its limits"

Where does that statement automatically mean "VLF detector depth"?

I have absolutely no problem with anything you said in your descriptions of your experiences with the detectors you have used. I believe you and I trust that what you related is as true as can be. In fact, in general I agree with you about overall VLF detector depth having reached its limits just due to power limitations alone.

However, the topic is not limited to just raw depth. It is also about how all of the VLF detectors I ever used (for 23 years now) except for the four I mentioned, (Equinox, Vanquish, Deus 2, Legend) could not remotely deliver the advertised, physically possible and well documented raw depths that were being stated where I detect or the target ID accuracy. The fact that a $189 Minelab Vanquish 340 could accurately identify 10" low, mid and high conductive coin targets using a 10" X 8" coil and an F75 with an 11X7" coil and showing full Fe3O4 bars could not even come close in a wild target head to head test that I did when the Vanquish series was introduced......I would say that is an example of VLF detector tech being very improved.

That it is what I was disagreeing with you about, not whether a detector like the Equinox will go deeper than an Etrac in the 130 year old park example you gave especially if the target is a deep silver coin.

Most metal detectors will find what’s there with the exception of a few...That’s been my experience,and I hunt in early 1800s parks,yards and areas in general.
I’ve been using what’s available for at least the last 10 years..mostly single frequency in the beginning of those 10 years,,F75,At pro,Deus 1,,etc..a few explorers and Etrac along the way..I’ve made some really great finds too with those machines..
Fast forward to the equinox on..So, I’m gonna be as clear about my experiences as I can be..I have yards ive cleaned out with the Deus 1 ,F75, and Etrac.Found dozens of silvers,wheats and tokens in these old 1800s yards,and a gold ring...The equinox came out,went back to these 1800s houses and yes I did find a few Mercs I had missed, maybe two per yard..I’m sure the equinox was the better machine,that’s why it found what I missed..Fast forward to the Deus 2 and Legend.. took those two machines to those yards and not a peep..trust me,they’re wiped clean..
Now, I’m sure the Legend or the Deus 2 would of found those few Mercs the prior single frequency machines missed,,but the equinox was out first before the d2 and Legend so it was the one that squeezed the last few out..
I have taken the Legend,Deus 2 and the equinox to my wore out parks,.Nothing, last coin I found there worth anything was a 1822 LC with the f75 about 9 inches deep.. clear signal one way,choppy the other way..I remember that coin..
Technology has marched on since single frequency machines but that doesn’t mean single frequency machines left much behind for the newer tech,,or that everything worth digging is masked to the point of owning a thousand dollar high tech machine is the Only way to get it..To my knowledge and experience those coins masked that heavily are only found in someone’s synthetic test results..
All good machines but in the end a wheels a wheel ,they’re all round

You folks read post above this one.
Want see a bunch of round wheels?
Here they are. See this link.
Person may hold record.

https://metaldetectingforum.com/search.php?searchid=12704199

First, the topic is "Some here believe that VLF detector tech has reached its limits"

Where does that statement automatically mean "VLF detector depth"?

Click to expand...

My bad, I forget not everyone was detected during the time when VLF technology came out. It was all about depth at that time. TR was no match for the new VLF, and it was all about depth. RAW depth By RAW depth I mean all conditions aside and in neutral ground.

The difference I see between the NOX 800, for example, and the E-Trac is the ability to identify a coin much deeper. Call it the ability to cherry pick, but I see it with the ability to tell you that an iffy target at 12" is more likely a coin than a piece of rusted wire. But that limit of 12" still exists in the VLF technology.

I would love to have others come to our park and see for themselves. I guarantee after they see the layout they would agree there are more very deep coins to be found no doubt. I've had only 1 person accept my offer and he went back home with a whole new appreciation of the E-Trac.

Detector said:

My bad, I forget not everyone was detected during the time when VLF technology came out. It was all about depth at that time. TR was no match for the new VLF, and it was all about depth. RAW depth By RAW depth I mean all conditions aside and in neutral ground.

The difference I see between the NOX 800, for example, and the E-Trac is the ability to identify a coin much deeper. Call it the ability to cherry pick, but I see it with the ability to tell you that an iffy target at 12" is more likely a coin than a piece of rusted wire. But that limit of 12" still exists in the VLF technology.

I would love to have others come to our park and see for themselves. I guarantee after they see the layout they would agree there are more very deep coins to be found no doubt. I've had only 1 person accept my offer and he went back home with a whole new appreciation of the E-Trac.

Click to expand...

I would be interested to know just how you hunted that park with Equinox. I am assuming you had 800 model.
Give all details please.
Detect modes, speeds, etc.

tnsharpshooter said:

I would be interested to know just how you hunted that park with Equinox. I am assuming you had 800 model.
Give all details please.
Detect modes, speeds, etc.

Click to expand...

Yes they were both the Equinox 800s. The mode was Park. I don't care for the other modes, but prefer to adjust a coin program to meet the conditions.

I got very few iffy signals in multi-frequency, so I ran in 5 kHz most of the time. I determined this after testing many signals in both multi & 5 kHz. The 5 kHz had an obvious better tone.

It got the same iffy deep signals but having only the 1 VDI made it a lottery game. On the E-Trac I gt those iffys on the very deep targets, but the FE is generally the clincher. If the FE was 15 or higher, the majority of swings, it was almost certain to be junk. If the FE was 12 or lower, on the majority of swings, it had a much higher odds of being a good target.

Swing speed I have always determined by the tone and VDI consistency. Some targets a fast swing would give the best repeatable signal and consistent VDI, other targets a slower seep was better. Kind of depended on conditions. It is a park built in 1883 so there is a lot of junk. Sometimes I had to try and isolate the target with a short swing.

After many hours of swinging both 800s for months, I found 2 masked coins. A 1943 wheat and a 193? wheat. Neither below 8". My buddy & I have pretty much cleaned out everything down to 10" or so with the E-Trac. This park has potentail written in the history books. A watering hole back as far as 1821, and a well used crossing as far back as 1541. We have pulled coins back to the 1850s. It was built to host one of only two authentic Mexican bull fights held in America back in 1884. Thousands of spectators filled this park. It has hosted the annual Dodge City Days since the beginning with BBQ contests, car shows etc. for many years filling the park with thousands of spectators year after year. Just saying the potential is endless, and the coins are there. I can show you areas where coins back to the 30s would be as deep as 24" from flood filled areas.

Detector said:

Yes they were both the Equinox 800s. The mode was Park. I don't care for the other modes, but prefer to adjust a coin program to meet the conditions.

I got very few iffy signals in multi-frequency, so I ran in 5 kHz most of the time. I determined this after testing many signals in both multi & 5 kHz. The 5 kHz had an obvious better tone.

It got the same iffy deep signals but having only the 1 VDI made it a lottery game. On the E-Trac I gt those iffys on the very deep targets, but the FE is generally the clincher. If the FE was 15 or higher, the majority of swings, it was almost certain to be junk. If the FE was 12 or lower, on the majority of swings, it had a much higher odds of being a good target.

Swing speed I have always determined by the tone and VDI consistency. Some targets a fast swing would give the best repeatable signal and consistent VDI, other targets a slower seep was better. Kind of depended on conditions. It is a park built in 1883 so there is a lot of junk. Sometimes I had to try and isolate the target with a short swing.

After many hours of swinging both 800s for months, I found 2 masked coins. A 1943 wheat and a 193? wheat. Neither below 8". My buddy & I have pretty much cleaned out everything down to 10" or so with the E-Trac. This park has potentail written in the history books. A watering hole back as far as 1821, and a well used crossing as far back as 1541. We have pulled coins back to the 1850s. It was built to host one of only two authentic Mexican bull fights held in America back in 1884. Thousands of spectators filled this park. It has hosted the annual Dodge City Days since the beginning with BBQ contests, car shows etc. for many years filling the park with thousands of spectators year after year. Just saying the potential is endless, and the coins are there. I can show you areas where coins back to the 30s would be as deep as 24" from flood filled areas.

Click to expand...

Based on your Etrac stuff you said. Your ground not very mineralized. Due to ferrous number not going ghost I’ve like 22-25 on deeper targets. Etrac will do thst here quite often on sweeps. Few ort 12. Now ferrous number can wind shield wipe like bounce from 10 for examplemand go to mid 20s or low teens.
Imo opinion.
In that site. Minimum iron bias F2=0 speed 3 and 4 park 1, park2 and yes even beach 1. SLow sweep. Anything chirps high tone. Investigate. Also prospecting mode 1 speed 3-4 minimum can get to some deep nickels, etc Etrac can’t get to.
Park 2 can not deeper high conductors some times vs park 1. It will be slower hunting for sure. But equinox if Emi not bad should hit down there deeper. Yeah.don’t expect as steady a id as Etrac gives. Eqx onnthe deep stuff won’t do. Use of 50 tones mandatory imo. Just the way Eqx works. Detector formsure needs to be ground balanced. Now one may locate a suspect target and slip Etrac over and maybe decide yeah it p’s down there.
Sites withnfre maskers expect less to be found after busted hard with CTX, Etrac, explorers when he;ring behind.
One has to ask themselves thinking of the depth strata as far as previous hunts.
How many coins were found at 10” deep?
How many at 9” deep?
How many at 11” deep?
Coins around here barring a lowered farm field. They ain’t going to be 11” deep.
Unless a mole has helped or a child buried years ago playing, or coin got buried incidentally like someone’s out a waterline in or pushed dirt building something leveling for building foundation.
I hunted this field where a church stood around 7 years ago. Right by the creek. This area flooded countless times. How deep were the coins. About 7” deep. With all that water over all those years. Plus the vegetation dying year after year.

Cheers.

Our city park is a bit unique to most sites. It sits along side the Arkansas River which used to flood on an average of every 30-40 years. The way the main area is set up with a sandstone wall at the north end, 24" tall and built in 1933, and open at the south near the river each flood would deposit from 3"=6" of soil at the north end, and taper off to the south.

If you look at the sandstone wall at the north end you find the ground on the outside of the wall down so the wall measures 24" to the ground. On the south side/inside of that same wall, where the floods deposited mud, the ground is level with the top of the wall. Making the ground inside, where the coins are, at a depth of 24", and that is just to get back to 1933.

You can start swinging at the south end of the roughly 80 yard grass play area and we found the old coin level to go down about 6". Anything above was fairly modern. This was why this park had been hunted for so many years and nothing matching the history was found with the older tech of the TR/VLFs. Until I got the Whites Eagle Spectrum in 1991. My buddies and I tok it to this park, as was the norm for any new detector, and BOOM, the very first target ended up being 3 wheats, 3 silver dimes, the oldest was a barber and a 1943 war nickel all in the same hole. Not a coin spill, but just years and years of coins being dropped on top of the same area. In fact, I dug more multiple coin holes than single coin holes for a long time. It was a 130 year old virgin city park below 6" where no man had gone before.

That is why I say I have possibly the best natural test garden you could want. You start at the south end and work your way north until you reach the depth ability of the detector. None have matched the E-Trac on going as far north and still recovering old coins. We have cleaned out all the easy stuff as far as the E-Trac could get. All other detectors, including the 800, recovered nothing past the 8"-9" area, and that was just two wheats that were being masked by the massive amount of iron. Wire & nails mostly.

There is yet a whole lot of the oldest coins yet to be recovered further north once I get a detector that can get the raw depth needed to get them.

You can see in the pictures the older trees that show no roots and look like they were just stuck in the ground. The river is just to the left in the picture.

tnsharpshooter said:

Based on your Etrac stuff you said. Your ground not very mineralized. Due to ferrous number not going ghost I’ve like 22-25 on deeper targets. Etrac will do thst here quite often on sweeps. Few ort 12. Now ferrous number can wind shield wipe like bounce from 10 for examplemand go to mid 20s or low teens.
Imo opinion.
In that site. Minimum iron bias F2=0 speed 3 and 4 park 1, park2 and yes even beach 1. SLow sweep. Anything chirps high tone. Investigate. Also prospecting mode 1 speed 3-4 minimum can get to some deep nickels, etc Etrac can’t get to.
Park 2 can not deeper high conductors some times vs park 1. It will be slower hunting for sure. But equinox if Emi not bad should hit down there deeper. Yeah.don’t expect as steady a id as Etrac gives. Eqx onnthe deep stuff won’t do. Use of 50 tones mandatory imo. Just the way Eqx works. Detector formsure needs to be ground balanced. Now one may locate a suspect target and slip Etrac over and maybe decide yeah it p’s down there.
Sites withnfre maskers expect less to be found after busted hard with CTX, Etrac, explorers when he;ring behind.
One has to ask themselves thinking of the depth strata as far as previous hunts.
How many coins were found at 10” deep?
How many at 9” deep?
How many at 11” deep?
Coins around here barring a lowered farm field. They ain’t going to be 11” deep.
Unless a mole has helped or a child buried years ago playing, or coin got buried incidentally like someone’s out a waterline in or pushed dirt building something leveling for building foundation.
I hunted this field where a church stood around 7 years ago. Right by the creek. This area flooded countless times. How deep were the coins. About 7” deep. With all that water over all those years. Plus the vegetation dying year after year.

Cheers.

Click to expand...

I believe his problem is with his health. He is not able to dig a lot. The Etrac allows him to cherry pick good targets better than the Equinox has. At max depth the Etrac gives him more info.