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  1. speculation please. what does the future hold? what advancements might happen? keith southern are you out there?
  2. I got in a few hours of metal detecting yesteday with my AT Max, which included some time at a park and a few permissions (private homes). Nothing of note was found, although I continued to struggle with trying to find good targets in high-trash soil. Given how I'm using the Garrett AT Max, I know have two primary options for finding good targets (silver coins) in these types of conditions. First, get a smaller coil, like the 5x8. Second, start digging the trash targets to clear up the ground and reveal possible good targets that are being masked or otherwise "overshadowed" by all the bits of aluminum, nails and other garbage. The second approach is not a viable option for most places I hunt (parks and private permissions). Not only do I not have the time to implement that strategy, my body can't readily handle that much digging. Also, I'm pretty sure digging almost everything is bound to lead to the loss of any good graces I have with property owners and park maintenance crews. Ok, so that leaves the first option. But before I go that route, I have to concede the possibility of getting an Equinox. Based on my experience with my Vanquish, limited time on the Equinox 600 and experiences with my AT Max and Fisher F2, I'm confident that one of the advantages of getting an Equinox will be more stable VDIs and more accurate VDIs at depth. And right now, I think I can live with that. I understand that getting a solid signal (a good, repeatabe signal from both swings and in 2 directions) on a dime or quarter at 6+ inches in my mineralized soil isn't always realistic with the AT Max. But I know the AT Max is at least capable of getting a decent signal (a good, repeatable signal from at least 1 direction and in 1 swing). Put another way, I get how the AT Max may not get me the "dig me!" type of signal that an Equinox can, but I at least need it to get me the "take a closer look, please" signal. All of that to say that I'm thinking about how my AT Max's target separating ability and recovery speed limitations (using the stock coil) will compare to an Equinox 600 and a stock coil. I came to this realization when running the AT Max with only iron discrimination set at 35 resulted in information overload for me and notching out everything below 70 was likely leading me to completely miss "take a closer look, please" signals that might lead to silver coins, dimes or quarters. Therefore, I want to use Monte's Nail Board. I know it's not ideal, and I plan on using Steve's approach of using both the AT Max and Equinox 600 on real-world targets. But I think the Nail Board will offer quantitative data when comparing the AT Max and Equinox.I also plan on using it with my Fisher F2 and Vanquish 340 to help put things into perspective. So how do I go about doing this test? Here's my approach so far: Step 1: Create Monte's Nail Board and use it with a modern, clad dime and new nails. Step 2: For each of the 4 passes, I will give it a rating: Will Dig, Maybe Dig, Won't Dig. Step 3: I will set the sensitivities at either 50% or the highest possible given EMI Step 4: I will run each machine with zero discrimination and with enough notching so that it's only going to sound on dimes and quarters (and maybe copper pennies). Step 5: For the AT Max, I will also test it with iron discrimination set to 35. Step 6 (maybe): Run the test with the AT Max using both its stock and 5x8 coils. So here's my first real question: what changes or additions would you all make to my current approach? My second real question(s): what "base" setting should I use with the Equinox 600. I'm thinking Park 1 with recovery speed set at the highest setting (3?) and a small or moderate amount of iron bias. Should I also run some tests with the Equinox 600 in 4KHz mode? My third real question: would it be benefitical to modify Monte's Nail Board so that the nails are replaced by either clumps of aluminum or maybe pulltabs? A lot of my hunting is in parks and yards that are often littered with more aluminum trash than iron trash. Any insight is appreciated. Thanks!
  3. From what I can gather, higher frequency VLF detectors are more suited for smaller gold but ground mineralisation may be something to factor in. Would there be a “better” frequency for nuggets 1 gram and above in heavy ground? I’m not too concerned if I miss sub gram nuggets if there is a better suited frequency. The old Garrett Groundhog circuitry was legendary in this country…..I think it was around the 15 kHz mark. Is this frequency range a good starting point or do I need to consider other things such as better ground balancing capabilities or Garrett’s extra coil voltage. My Minelab PI units will be mainstay detectors but as mentioned in another post, I have ground littered in man made iron junk and the ground mineralisation is severe. There are plenty of nuggets in the 1 gram to 5 gram range (maybe bigger) but the iron signals are as dense as 5 per square metre 🤬 Thanks for any ideas.
  4. maybe we could have a multi frequency coil, that recieves a single frequency or selectable single frequency and effectively distorts and amplifies the single frequency resulting in frequency variants up and down, mimicking or creating smf
  5. After the good new I realized when tested a few days ago my machine after It drowned and I've succesfully reanimated It.... Now the horrible gasket Is fighting to stay out of the housing against any kind of attempt😒. So I'm in the middle of a headache manutention session with scarce results. That's the Mood guys😑
  6. See NASA-Tom’s comments https://www.dankowskidetectors.com/discussions/read.php?2,181189
  7. Don’t know any other better subforum to place this. When manufacturers design make sure platform can allow at least 2 software versions or at the very least allow what I call both newer version update (whole) and a older subset (portion of older version) to be used. Why? Makes testing easier if and when a newer version is designed and requires pre release testing in the field for validation. Would allow users after version release to use different versions and gain first hand feedback of the benefits or lack thereof of different versions or version subset(s). Case in point. Notice Minelab left old iron bias to be user selected when they released newer version with iron bias F2 option. So in a nutshell this allows the detector versions ( or version subset) to be compared to the themselves in the field by the user. Xp should have done this too. They should have designed Deus imo where at least 2 complete version allowed to be uploaded to unit. Notice the later released Ace Apex. Garrett should have allowed on it too. Don’t know what added production cost this would cause. Hopefully not much.
  8. This was mentioned by geof_junk in another thread and had a little Google. Found this https://www.phys.k-state.edu/reu2011/nnorvell/Metal_Detector_Research.html I don’t really understand the technical side of metal detectors. Does this have any application to current day detectors? Will it help cancel out ground noise more? Will the current crossing/not crossing the ‘bridge’ tell you something about what is under one of the receive coils. Although I don’t understand it, I am amazed and a little in awe of those that do 👍
  9. This is a topic relevant to every(?) form of detecting -- ground coverage. I'll list several questions concerns I've had but any replies of course aren't limited to these, nor do they need to address any of them. Just tossing out some ideas to prompt further discussion. 1) What methods and efforts do you apply to ensure full ground coverage in the cases where that is one of your goals? 2) Is your sweep a straight line path or an arc? 3) How long is your sweep? 4) How much do you overlap consecutive sweeps in the direction you walk? 5) How much do you overlap side-to-side swings when following parallel paths (e.g. when walking two side-by-side swaths in the same direction how much does the left end of one path overlap the right end of the next path or vice-versa)? 6) Have you ever measured your coverage? How well do detectors with GPS (e.g. Minelab GPZ-7000 and Minelab CTX-3030) monitor ground coverage to this detail? Have you used other devices to measure ground coverage. E.g. I can imagine a drone with camera could provide useful data. Are there smartphones app that would help quantify coverage?
  10. Just dreaming... What'dya think? Minelab technology going on the next moon mission? X6 must be space-worthy.
  11. If this question has been addressed elsewhere, I apologize in advance and hope someone can give me a link for it. I have noticed that other companies besides Minelab are coming out with PI detectors for less than $3K. How do these detectors compare to the best Minelab detectors for Gold and also relic hunting?
  12. On the Anfibio Multi (and I think Kruzer & others) there is a definite step in sensitivity between 39&40 Gain and again between 69&70 Gain. Is this a change in the Internal Threshold? In a way this would be the inverse of the way the F75 adjusts sensitivity according to Mike Hillis. Regardless, it is a very good set up in difficult sites. Most NM users know about the difference in response speed between 89 & 90 Gain on 3DI. This is different. I had read about these steps in a forum post that quoted Alper of NM. I can't seem to find that post now that I want to re read it.
  13. https://patents.google.com/patent/WO2021016649A1/en?assignee=minelab&scholar&oq=minelab&sort=new This is the most out of this world Minelab detector patent I've ever read. There is so much here, some very sci-fi like, I don't even know where to start. My takeaway is they seem to be positioning themselves for a drone based detector eventually (main details in this patent could be easily transferred to a drone based platform - IMU, GPS, magnetometer, heads up display, FPV, remote control, robotic/vehicle mount, etc) . That is 100% a guess. But in the meantime, there is some interesting, novel items in the pipeline that we might actually see on a machine in closer future? No clue if this is a coin machine or gold machine or if it's something they are actually working on right now or just trying to get control patents on such things for the future which may or may not arrive. One thing is for certain, Minelab is BUSY in the engineering department. A few of the highlights: Heads up display over glasses/head mounted display (aka augmented reality). Settings, target visualization, shading of detected/not detected areas (I asked for this specifically 5 or 6 years ago here, awesome to see it in a patent now). Plus a camera showing the coil (why would you need that if not operating remotely as from a drone?) The detector has a camera, IMU (accelerometer) and magnetometer to determine position with accuracy. The IMU tracks the position of the coil in real time in relation to both the ground and the target, and combined with the camera video feed will provide a "visual" of the target in the ground through the glasses/head display, as in form of a heat map which increases accuracy with each pass of a coil over the target. A GPS tracks the machine position to properly map the IMU/coil visual target data on the ground and let's a user see the mapping as they detect. This data is recorded for future historical use and can be shared. Centimeter accuracy with the visual target heat mapping. Potential operators/users include entities other than humans such as "robots" and "an AI (artificial intelligence) using a metal detector" and this line: "The metal detector may be handheld, mounted on a robotic arm of a vehicle or a robot." Wireless connectivity to computers and phones, transfer of files containing settings configurations from instructors or expert users Remote control of the metal detector through apps on laptops or phones Ability to upload maps, including detecting data, historic human activity, buildings, or other items that seem to indicate custom mapping capability Internet connectivity, potential control through the internet (again, why if not for a drone type device?) "Teamspeak" to other detecting members in the area wirelessly Visual/spatial discrimination Accurate depth measurement Synthesized audio mode, eliminating noise completely and allowing the detector to "recreate" a synthetic audio stream based on data from prior swings Delayed audio processing (enhanced audio) mode or real time audio mode, ability to seperate multiple close targets, reason for this I venture a guess why below ---> This patent actually seems to be describing a completely new method of RX in a detector. Which is actually similar in some ways to the wacky idea I had years ago of reducing EMI/ground noise by emulating a radio telescope array. But in this case they appear to be describing a fairly ingenuous method of doing something similar with only one coil by monitoring RX of the same target at different points in the swing (with the IMU tracking these points) and combining all those RX signals. In this way (and this is my guess, the patent doesn't explain this), you can form a sort of comparator, gradiometer, or interferometer to seperate the wheat from the chaff, so to speak. If that's what they are doing, then I find it to be brilliant. If not, then I just gave them one hell of an idea to patent for the future. That probably sounds like jibberish to non-engineers. But I want people to understand the brilliance in simple terms. Consider this: EMI is random. At any given point in your swing you'll get noise here, but not there. So if you compare two points in the same swing, you will hear noise one point but not the other point because the "zap" already ended. But you might hear a good target at both points in the swing since it's not random like EMI, it's always there in the ground. So, you can effectively eliminate EMI by comparing what signal is not there at two very close points in the swing, and keep the target since it's always there. Similarly, with ground, the ground changes as the alluvium changes since soil is inhomogeneous. But a target is still the target. So, a similar method can be applied to the ground. In theory, you could use ideas like this to essentially get rid of the Difficult type timings and keep your gains boosted high, and deal with EMI/ground in this way instead which does not require reducing sensitivity. A totally new, novel approach to RX in a metal detector. The audio processing is very slightly delayed because they are using that time to compare measurements at a few different coil positions before letting the audio processor signal that there is a target present. That's my guess. If that isn't what they are doing, then someone else should patent that and thank me for it later when Minelab buys it. Either way, they have something totally new in the RX department here. And the future of detecting looks bright and interesting to me still.
  14. Hello, now here’s an opener that might just get me banned on my first post! Bear with me, my intentions are pure :) Does anyone know if it would be possible to jam an MD signal? The reason I ask is to combat the evident problem we have in the UK with “nighthawks”, illegal detectorists. Over here, any landowner can grant permission for detecting on their land (with caveats, known historic sites are protected by law). What often happens is that such a permission is granted and a detectorist innocently sets about his / her business. Someone less scrupulous spots this person and assumes there may be something important there, so shows up at night with a couple of friends and the landowner awakens to a field / lawn full of holes, then bans metal detecting. Historic sites are also looted. Just an off the wall question, how tricky would it be to build a device to block this on a piece of land? Anyone any ideas?
  15. 99% of my detecting is done on central Florida beaches. Since it’s impossible to establish a well stocked test garden at a public beach, I sorta brought the beach home with me and developed my own private beach garden! I cut slots in two large empty chlorine tablet buckets at various depths as shown from 2 -16 inches. I then filled one with New Smyrna Beach sand and the other with soil...for the few times I land hunt around here. I embedded numerous examples of ferrous and non ferrous targets into paint stirring sticks. I also have several blank sticks I use for gold and silver jewelry as well as artifacts that I don’t want permanently attached to a stick. I then insert the target(s) in the slots, each at its desired depth, and start scanning. This allows me to rapidly change the targets, depth and relative position of each. I can now test for sensitivity at depth as well as separation of ferrous and non-ferrous targets in a variety of scenarios using actual beach sand where I do my detecting. If I want to test in wet salt sand, I just soak the bucket sand with authentic sea water that I also brought home from New Smyrna Beach...and the Atlantic Ocean never even missed it. 😉 Works for me.....
  16. Found this patent that Whites filed and got a patent on in 2014 on a hybrid IB/PI machine. https://patents.google.com/patent/US20110316541A1/en Curious if anyone heard anything about this. Maybe Garrett will take it on?
  17. I know we have had some great advancements in VLF metal detector's over the recent past, but I am hoping that we can keep some of the older design features that seemed to work well. My favorite new technological features being offered in VLF's are Multi-IQ and single frequencies options, fully programmable settings, waterproof, noise cancel, USB chargers, li-ion batteries, Bluetooth headphones, prospecting & coin/relic options, and lightweight. Really a great job by the inventors of these detectors. IMHO I hope we do not lose some of the past designs that worked well, such as the ergonomics of the balanced s rod that would separate in three places for backpacking, the hip mountable brain box, the detectors that would not fall over when put on a little bit of an uneven surface, the 6.5 inch elliptical concentric or double DD coils for great access in rocky areas, the 1/4 inch headphone jack, the spare interchangeable battery pack that takes regular batteries to serve as a back-up for the li-ion battery pack, and higher frequencies options. I would like to see what else had worked well with other detector user, seems like we are always buying aftermarket parts to retain some of these older features where possible.
  18. Not sure where this belongs on the forum, (or if it even belongs here), but this seemed to be the best category to discuss this. Ever since information on the GPX 6000 started to trickle out, I had this nagging feeling something in detecting has changed for those of us who like the thrill of getting to know a new detector. I never would have envisioned the GPX line morphing into a simplified detector. After having the GPX 5000 for a bunch of years now, and using it for relic and beach hunting, I could not imagine relying on a machine that adjust everything for you. I get it that money talks, and when you are a publicly traded company, you go for profit first, and then deny it 😄 And now that there market has switched to an area that probably has very little experience with detectors, the GPX 5000 must have been daunting for them. So they cater to that market. But I was hoping that a new GPX would fix some of the issues that the 5000 had. I was naive. Minelab has never kept the good parts of their previous machines and just added the the things that needed improvements. On the E trac, the best part of it was the depth it had in finding deep silver, in long tones, multi. Also the bouncy numbers helped ID deep Indians. When the CTX came out, it lost some of that fluety tone and they tried to straighten out the numbers to a number 12 line. So a two dimensional screen that worked well was transformed into a 2 dimensional screen that bunched most targets on one line. The The EQ comes out and squashes out the numbers even further. So why I thought the 6000 would not do the same is beyond me. I guess I'm disappointing that the "trend" is to make machines where the manufacturer decides on how your machine is going to be set. I hope someone in my area gets a 6000 and is willing to bring it to the beach to compare settings on deep silver. If it wins, then I will eat my words. I know I will get some slack with people saying it's a gold machine, not a relic or beach machine, but to them I would say.... you should be worried when a company controls your ability to fine tune your machine. Thoughts?
  19. I'm looking for a Compass metal detector catalog that includes the Compass Gold Scanner, and Compass Gold Scanner Pro models. The full line catalog, and this would be about 1990-1992 or thereabouts. I'm adding a few key older metal detector catalogs to the Downloads Area to provide basic info on older models. I do not need a ton of catalogs, just key years where major model changes occur, as things moved slower back then. If the catalog was in pdf format that even better, but Googling only turns up a couple older catalogs, nothing I can find covering the Gold Scanner era. I am more than happy to pay for a print version if need be, so I can scan into pdf and put up for people to download. Thanks in advance for any help. Me and my Compass Gold Scanner, back around 1990:
  20. XRF's hold sort a mysterious place on the shelf of semi-unobtainable prospecting equipment. 99% of prospectors don't need one. Maybe this post will help clear up some of mystery around these devices, and show where they can actually be worth the outlay of capital. And why for almost all recreational/hobby prospectors, they are not worth the money. What does an XRF do? In very simple terms you point it at an object and it will tell you what elements are in that object. More on this, and why it isn't this simple, momentarily... After sometime over 5 years of searching, I was finally able to find a used XRF I could afford to finance recently. These are not tools for recreation. They are expensive and require understanding how they work, what tasks you need to accomplish, and understanding the limits of XRF. The trick with these units is to find one with the proper calibrations already installed as they can be many thousands of dollars to send to the manufacturer to get configured correctly for mining/prospecting uses and to add/subtract elements or to calibrate for certain matrixes (silicates/iron/etc). X ray tubes and X ray detectors are about $6k each to replace, and recalibrations are about $1500 a pop, so even maintenance is crazy expensive. It's a tool you need be certain you need or can put to good use before buying one. And buying used, it's probably best to find one with as few hours use as possible to delay the inevitable tube replacement, as well as with a recent calibration certificate. My unit is an XMET 7500 made by Oxford (now Hitachi). The more common units people generally see are the Olympus and Niton guns. This unit has basically every mining calibration Oxford offered on it in addition to soil and other specialized mining related modes, which is very valuable and very useful for prospecting. It also detects down to magnesium without any fancy helium purge techniques. The guns sold on ebay with only alloy calibrations are pretty useless for prospecting without spending a lot of $$$ on additional calibrations. Some other things to consider are the machines themselves vary greatly between model numbers and some models may be unsuitable for specific uses in prospecting. A few things to educate yourself on are: Beam energy and detector type (determines if certain elements can be detected at all, and how accurately) Electrode composition (Gold electrodes have lower sensitivity to gold in ores, for instance) Calibration to light elements, or ability to detect certain elements I don't think an XRF is particularly useful for people who are only looking for gold. Due to the electrode limitations, the PPM minimum to detect gold in ores can often be above what would be an economic (and thus desirable) concentration in gold ores. But, looking for tracer elements (stuff like Pb, Cu, As, Zn, etc) can be quite useful. It can also help outline buried ore bodies which can then be explored mechanically via drilling or other methods. For prospectors branching out beyond just gold however, an XRF can be even more useful. And that's when one needs to understand the elemental limitations and what your application specific uses are. Any affordable XRF today will not detect lighter elements than magnesium. Some will detect to magnesium, but then do not contain calibrations to allow it (extra $$) and some require helium purging to measure light elements. Elements like hydrogen, carbon, oxygen, and sodium are very common "rock building" elements. But XRF readings will lack these measurements. So, when a looking at a rock your readings will often give fractional (less than 100%) results. This is why - the missing mass is tied up in atoms lighter than magnesium. Fortuantely, a lot of common rock types have unique fingerprints still in elements such as Mg, Al, Si, P, S, Cl, K, Ca, and Fe. But some don't. This is why it's important to understand what you are looking for first in the field, and then find a tool that is going to match your needs. Further, a lot of minerals in certain locations but not other locations will also have further fingerprints in other elements such as Cr, Co, Mo, Nb, certain compositions of rare earths, etc. To make it more complex (this part took me a while to wrap my head around), each calibration within the machine may or may not be configured for some of these elements - even if they are within the range of detection of the machine! Like, an alloy calibration will have little use for silicon or calcium. Conversely, a mining calibration without magnesium or calcium may be next to useless depending what you are looking for. Of course, it costs extra money to add elements and even if you have for instance a precious metals calibration that includes platinum, the mining mode may not itself include platinum and that's more $. That is why the matrix matters, each mode can be calibrated to a specific matrix. Like mining modes are generally going to assume that the sample is mostly silicon, whereas precious metals mode might assume the only things that exist in the universe are metals. So if you analyze solid metal with mining mode it may misidentify elements thinking they have to be metals when they aren't, same as if you analyzed a piece of gold ore in precious metals mode where it will try to assign certain non-metallic spectra in the ore to something like gold or platinum, giving you false positives. This is why calibrations available and elements assigned to that calibration is so very important when it comes to XRF and accurate results. Why else is XRF bad for gold-specific uses? (I emphasized this because this is primarily a gold prospecting site, even though I prospect for many other things myself). First one needs to understand how XRF works - simply put it kicks a few electrons out of a few different orbitals around an atom at discrete energy intervals (these are spectral "lines"). When another electron falls into the empty orbital to replace the vacancy, another X Ray is emitted at this discreet energy. Unfortunately, some elements have some very close to identical spectral lines. Look here at some lighter elements and see the overlaps on this visible spectra chart that we use to ID elements in stars? Some might be familiar with these from astronomy or high school. Well, the same happens in the X Ray realm. This is coincidentally why ionized gases look a certain color to us and how "neon" signs can be different colors (different elements inside the tubes). The same thing happens in the X ray spectrum, just not visible to our eyes. Except when the X ray spectra is reaaaaaaally crowded around the gold lines. Making it hard for specific ID's when other elements with similar lines are also present in ore, and unfortunately some of the elements are also commonly found with and around gold mineralization. Combine this with the anodes on many affordable XRF's being gold which itself interferes with really precise Au measurements, and you can see why an XRF isn't the best tool for specifically gold prospecting. Here is an actual XRF spectrum. You can see how very common accessory gold ore elements populate and crowd the gold spectral lines at various orbitals. And also how you might be missing critical lines if your X ray tube only goes to say 15kEV instead of 40kEV (EV stands for electron-volts), you might miss some Ag, Ru, Cd, or Zr fingerprints in this specific case. Now notice how iron stands all alone? That's why some elements (iron) are easier for an XRF to ID than others like gold. So for some such tracer elements in soils and ore, and identifying certain minerals which really can only be accurately identified via spectroscopy or thin sections as for some gems, an XRF can save months of time and thousands of dollars for in field qualitative assays to do first stage determinations, ie, wether a resource is simply present or not, ignoring actual concentrations. This is why it's so important for anyone considering one of these units to know exactly what they are looking for first, to know the limitations of XRF, and to know if a unit will meet their application specific needs. Almost every company I spoke with had a story about a prospector, or even a few cases some junior mining companies, who purchased an expensive unit only to find it wouldn't work at all for what they needed to do. So hopefully this clears up a little mystery about XRF's and maybe saves someone from making an expensive $15k mistake. I am by no means an XRF expert and everything I know is just self taught. So if I've included an inaccuracy then please correct me. This is not intended to be definitive, but just to share what I've learned over the years in a few pages of simpler to understand jargon for those prospectors interested in these devices. More later with some actual measurements...
  21. Metal detectors can be used for all kinds of utilitarian purposes in addition to their hobby and sporting uses. From finding property line markers to finding house sewers, there are all kinds of uses that can save both time and money for all kinds of home improvement and maintenance projects. Metal Detectors and Property Lines Markers What are property line markers? At some point in time, virtually every property has four long rebar stakes driven into the property corners by either a property owner or a real estate developer. Property boundary markers are important to be able to locate for construction projects and legal reasons, so that way you don’t encroach on your neighbor’s property. Finding a boundary line marker might seem like quite a difficult task, even with a metal detector. Just think about all of the nails, pop tabs, can slaw, and numerous other metal objects that are commonly found in yards. Ferrous vs. non-ferrous metals Metal detectors find Ferrous metals which include steel, carbon steel, stainless steel, cast iron, and non-ferrous metals which include aluminum, brass, copper, nickel, tin, lead, zinc, and other precious metals (gold, silver, etc). Property markers are usually made of solid rebar which is mainly made up of carbon steel. Carbon steel is a ferrous metal and most cheap metal detectors can pick this up. The rebar is buried only a few inches underground so as to not get hit by a lawnmower (1″ to 3″ depth). How do you find property line markers? One remedy to this is to find the plot plan of your yard or your property. This plat survey shows you exactly where the land developer or inspector drove the land surveying corner markers into the ground. It also shows you where the easements for various utilities and various city property are located in relation to your own property survey markers. Once you have a rough idea of where the property line marker will be located, it is simply a matter of metal detecting around the corner and finding the piece of steel. If the rebar happens to look damaged or like it may have been altered somehow, it may be important to double-check where the exact property lines are with a professional land surveyor. Metal Detectors and Surveyors Professional Land Surveyors Professional land surveyors perform all kinds of varied tasks, and many of these involve property boundaries and being able to locate various components of properties for landowners, whether it is gas lines, electric lines, or any other utility. There are also metal detectors that are built specifically with the land surveyor in mind and these are referred to as magnetic locators. These are designed to easily find ferrous metals. However, one of the most important features is the ability to discriminate against all kinds of metals except for the exact one you are looking for, in most cases steel. These metal detectors also have to be able to detect deep, especially when you want to search for property boundary markers and gas or electrical lines. Surveyors always have access to the plot plans for each property and will be able to use the marked utility lines and property boundaries to get close to where they need to be. Gas lines and electrical lines are easy to determine, as they are long and you will be able to find it several feet forward and several feet backward. Metal detectors are one of the greatest pieces of equipment that surveyors can use, as they save both time and effort for almost every surveying activity. Metal Detectors and Buried Sprinklers Sprinklers are a great addition to any yard, but sometimes they can cause serious headaches. When they get covered with dirt or just won’t come up anymore, it is important to find the issue and quickly address it before it leaves an impact on your lawn and garden. Luckily, sprinklers are very easy to find with metal detectors, as most sprinklers have many metal parts and are only a few inches below the ground. When you begin using the metal detector, make sure to have the sensitivity as high as you can until it starts intermittently beeping, then turn it down a notch, as there might not be a ton of metal in the sprinkler heads. It is a good idea to use iron discrimination because there is more than likely brass or some other alloy in the sprinkler. If you can get within close proximity of where you think the sprinkler head is, this can save you from digging a bunch of nails and pull tabs. If a previous owner installed them, you may possibly be able to contact them. Once you have found it, gently dig around it with a trowel or spade, being sure to not hit the waterline. Once this is done, you can perform maintenance or call a maintenance professional to get your sprinkler back in order. Using a metal detector is the best and fastest way to locate sprinkler heads in any yard. Metal Detectors and House Sewers Your home’s sewage system is one of the most important components you need to be aware of. When something goes wrong with anything involving your sewers, it is vitally important to figure out what is wrong and figure it out as soon as you can, as this can prevent expensive repairs. One of the best ways to find the various components of your home’s sewage system is to use a metal detector. If you live in town or a developed area, you will more than likely have a sewer main which runs underneath the road in front of your house. There is a lateral pipe that connects your home to this sewage main. If you live in the country or in some other scenarios, you will have a septic system that is connected to your house by the lateral pipe. There is also a cleanout that allows for access to your lateral pipe, and many times a piece of rebar is put near it in case it gets buried, allowing your metal detector to pick it up. Metal detectors can help you locate these various components if there is ever an issue and you will be able to see what is going on. If it is something simple that you can fix, that is great, but if it isn’t you might have to call in professionals. Either way, you will be able to save time and money by having located the components for the company. Best Metal Detectors and Magnetic Locators If you need a metal detector for any of these jobs, you have two options: you can decide whether you want to buy a machine for the long-term or rent a metal detector as a short-term purchase. There are pros and cons to both decisions, and what it ultimately boils down to depends on your situation. It’s common to rent a machine when your primary goal is to find your property line markers. Metal detectors can be pricey and it can get overwhelming when you don’t know a lot about them, so in this scenario renting a metal detector can be a great way to find your property line marker and test out a machine. Who knows, you may end up liking it and making a long-term purchase! Magnetic Locators The best machine you could use to find property line markers is a magnetic locator. As mentioned above, these machines are designed to easily find ferrous metals including rebar. Here are a few machines that we recommend using: The Fisher FX3 Ferro Magnetic Locator Probe The Fisher FML-3 Magnetic Locator The Fisher FP ID 2100 Magnetic Locator Metal Detectors and Accessories If you are just trying to locate metal that is close to the surface, you can get away with buying or renting less expensive, lower-quality machines. If you need to find pipes deep in the ground, a higher quality machine will have to be considered. For a budget metal detector, it is definitely worth considering the Bounty Hunter Tracker IV, as this metal detector provides everything you need for basic jobs, at a great price point. If you want a metal detector that can be used for basic needs, as well as finding smaller metal targets deeper in the ground, the Garrett AT Pro Metal Detector is durable and will get down deep in the ground to find exactly what you are looking for. If you absolutely need to find deep down targets, a professional metal detector such as the Nokta Makro Jeohunter 3D Basic will get the job done quickly and effectively. These are just a few of the metal detectors we recommend to get started on, but for more options check out our guide on the best metal detectors. Conclusion Operating a metal detector can be overwhelming if you’ve never used one, especially if your main goal is to find a property line marker. However, hiring a professional surveyor can get expensive. Whether you decide to rent or buy a metal detector, we recommend checking out any of our resources on the blog to help guide you through this process. How To Find Property Line Markers With a Metal Detector originally appeared on kellycodetectors.com
  22. Good morning all! I saw a post yesterday where someone mentioned the possibility of linking the equinox to an audio analyzer to get a visual readout on target tones and I found the idea fascinating. I've never seen this done and was curious what the old hands here thought about the idea. I'm sure the engineers at minelab (or any other shop) configured the sound of their machines with the human brain in mind, so our wetware may already be the best analyzer there is. But I can't help but wondering if a visualization of the audio would provide interesting heretofore undetected differences in targets that appear to be mostly indistinguishable to a rookie ear, namely uniform can slaw and pulltabs. Anyone here have any idea?
  23. After a rather long hiatus (knee replacement) I finally was getting out to do a little detecting this weekend and found that my pinpointer had decided to go on a walkabout. Over the past few months I’ve directed several forum members to opportunities to purchase a TRX and now I needed to find one for me. Not an easy task. There is a used one on Ebay right now with bid already over $200 with five days yet to go….. OK, to the point of this post. Searching around I did stumble across a site selling TRX’s for $55 ea for a lot of 10 pieces, with about $150 for shipping (~$70 ea). Normally I would just move on assuming that this is more Alibaba/Aliexpress knockoffs but I decided to do a little more looking around. They list a fairly wide range of detectors and brands, including a number of MineLab models. My understanding has been that MineLab is very aggressive in shutting down dealers carrying counterfeits. Doing some online searching I didn’t find specific mention of counterfeit TRX’s, though plenty of discussion of Whites detectors, particularly the GMT. The Goldbug 2 and GPX 4500 were also quite popular. Here’s my questions. Do you think there is a possibility this may be a legitimate dealer? Last fall just after White’s announced their closing there were some dealers who were discounting their inventory before Garrett said they would be covering warranty issues. Does MineLab truly aggressively go after dealers selling counterfeits? How much mark-up is there on detectors, and could this be a dealer who is not following the pricing “covenant” or functioning as a middleman to smaller dealers? I will admit that prior to retirement I might have thought about taking a fly at these just for the hell of it, I’ve certainly taken bigger gambles (and losses) on gold stocks. At worst I may have been able to unload them as fakes that work as well as other pinpointers that sell in the $50 range – or just another bad stock investment. There’s always that risk when we buy anything used on EBay, Craigslist, Treasure Classifieds, TreasureNet , etc.,(i.e. the TDI SL I recently bought that wouldn’t ground balance and hopefully can be repaired), and I question the number of “new” gpx4500’s I’ve been seeing pop up in ads lately (really, how many people are going to buy one and then sell it unused at a significant discount?). Well, I’ll keep looking and hopefully a reputable dealer will find some hidden in their stockroom.
  24. I was out yesterday and remembered that the Gold Modes (I use Gold 1, if that matters) can be used to investigate iffy targets. Then I had a thought when I noticed a lot of ferrous hits per swing (likely nails) while searching in Park 1 (no notching/discrimination), gain of 24, Recovery Speed = 4, Iron Bias F2=0 -- I switched over to Gold 1 and the target rate per swing increased dramatically, something like a factor of two! (Note: there aren't hot rocks in this location and I checked that ground balance was correct. I'm pretty sure these are bits of iron such as nails or pieces of wire.) I also checked in Park 1, 4 kHz since there have been reports here that this sometimes eliminates iron grunts. That wasn't the case. This got me thinking about what the Gold modes are, or at least how they are different from the other modes. In limited testing (@40 kHz) I've found that they can detect coins deeper (or maybe 'farther from the coil' is a better description) than the other modes. Once again having to deal with the confusing (non-standard) nomenclature, it seems that the Equinox Gold modes act & perform similarly to the "all metal" modes of other manufacturers' detectors such as the Fisher F75. (For example, the only tone option is Voltage Controlled Oscillator = VCO.) Dave Johnson has used multiple terms to describe that kind of mode, including 'single filter' (see F75 user manual). In other words, it's as close to a raw signal as you can get if using motion to maintain stability. So that leads to the question: is this all the Equinox is doing in Gold Mode -- using the minimal amount of signal processing to keep the response stable? I can think of one filtering option available in the Gold modes which isn't present on traditional all-metal modes of other detectors -- discrimination/notching. But even for that, the F75 all metal mode has digital target ID readout so something is going on there, although in that case possibly in parallel.
  25. I’m a newbie and saving up to buy my 1st metal detector. Meanwhile I’m rockhounding a lot. I’m curious if folks have successfully applied portable ground penetrating radar (or other portable detecting devices) to predict likely location of crystal pockets in the hard rock, like in dolomite (for locating pockets of Herkimer Diamonds) or in granitic pegmatite (for locating pockets of gem tourmaline crystals) ? Any pointers would be appreciated.
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