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Showing content with the highest reputation on 11/03/2017 in all areas

  1. 3 points
    There were a couple of interesting post scripts to the Orange Roughie saga, and at risk of boring the readers of this forum I shall relate them, beginning with the bulldozing episode. When it was realized that the extent of the patch was significant, we decided that it would be prudent to 'peg' the area. Rather than put a lease over it (the patch eventually measured 740 meters by 360 meters) we opted for four 'miners right' claims which we hoped would cover the auriferous ground. There was one claim in Murray's name, one in John Carr's name, one in Marlene Carr's name and one in mine. We hoped there would be some deeper ground where a scrape might yield gold beyond the depth that the 16000s could normally reach. When I had dug the Roughie at a depth of a bit over twenty inches, I detected the dirt before I back filled the hole, and low and behold there was a small color of a couple of grams in the heap. This gave the impression that there would be loads of small gold scattered across the patch that we just were not able to detect without scraping. The fact that the gold detected to that stage was mainly large (about 200 bits for 300 ozs) seemed to indicate that there would be perhaps that much more again in small colors. It seemed logical. At that time I owned a Drott equipped with a four way bucket at one end (with the bucket open it would scrape quite well) and a backhoe at the other (most handy for taking a costean to check depth to bedrock). We agreed on a three way split after the landowners cut. One share for Murray, one share for me, and one share for the dozer to cover repairs, wear and tear etc. Murray and I would split the fuel costs. This is a fairly common arrangement among prospectors, and saves having to hire equipment when one partner already has a machine. I was to do the machine operating, and Murray the detecting. Unbelievably, after scraping and rehabilitating a huge area only a bit over ten ounces was recovered. It seems those prototype 16000s did a mighty job the first time round, and the ground was shallow enough for them to penetrate to most of the gold. Needless to say, we felt a bit ripped off, and had we hired a dozer we would have suffered a big loss as the whole exercise took a number of weeks to complete. I then sold the Drott, and took a bit of a hit financially. From my point, it would have been better not to have bothered with the claims at all.
  2. 3 points
    We talk about the "old-timers" but in 100 years we will be the old-timers. There will be footnotes about the "Electronic Gold Rush" of the late 20th and early 21st century - and we will be the ones that had a part of all that. Making history with every nugget dug!
  3. 2 points
    My Apprentership Tally for the 2017 Season in Western Australia, 715 pieces of gold, Biggest nugget was 10.87grams, smallest was 0.09grams. Biggest patch was 62 nuggies in an area not much bigger than my 14ft caravan. All found with the mighty Zed. Gold is sectioned in the photo as explained : Top section and the small pile at the 9 o’clock position was from my trip early in the season ( roughly 3 months ) for 458 pieces. Small pile at the 8 o’clock position and remainder of the gold on the right lower section was from the latter trip of just over a month golding for 257 pieces. 9 o’clock & 8 o’clock piles was the 62 patch found on my last day of the early trip and clean up on the first day of the latter trip ( best patch bit was a 6 grammer with a total patch weight of 37.56 grams ) Total weight comes in at 11ounces ( possibly a tad more when I crush the speccies ) Cheers Ashley
  4. 2 points
    My cold weather gear is REI wool tops and bottoms, different types of gloves and a wool hat. I have some nylon fishing shirts some heavier wool shirts and some heavy cotton. I also have wool/silk and wool socks... The wool is smart wool that comes in various weights. If the temp is below freezing... I don't go. have 1/2 fingers-they work pretty well-however, that crowds my hands on the gpz. work gloves Racket-ball gloves are great for cold but not freezing condition. Also home depo work gloves...remove the little magnetic strip the sometime have. I have wool gloves that have half fingers
  5. 2 points
    GOSH ....one hundred years from now. I really don't think I would want to be on the planet then. It sure won't be like we have had & experienced in our life times. Even the changes we are witnessing now & through our times. I feel sorry for my childrens children, & there kids after them. But then again....what they are born into is all they will know. Except from what great grandad can tell them & show them photos & video....if they are still relevant... As to gold & ones ability to get out there in one hundred years from now. What will technology be.....will there be any gold left....will one be able to or allowed to look for it....will there still be a planet......????? I shudder to think... Live your life to the fullest. Get out there & enjoy what is there NOW, because one day...it wont be. Good luck out there JW
  6. 2 points
    Buy then maybe someone will find all the gold crowns i will be returning to the ground.
  7. 2 points
    Hi Rod, It has nothing to do with the F75 per se. All metal detectors using a discrimination circuit have a possibility of mis-identifying weak signals as ferrous in bad ground. Bad ground basically means the ground itself has a high ferrous content. The coil sees everything under the coil, both target and ground. The key is weak target, either small items, or large items at the edge of detection depth. If the target is weak and the ground ferrous content high, the detector blends the signal and the predominating ferrous content can cause the detector to identify the target as ferrous. So yes, nearly all prospectors will tell you to dig all targets. Many, like myself, use detectors that have no discrimination at all. It is simply common knowledge among prospectors that discrimination results in lost depth and some good targets being called bad. Target masking can also be an issue. That is not the end of the world or anything, just a base line fact. From there you do what you have to do. Any detectorist runs into situations where digging all targets is not acceptable for many reasons. Park detecting is one reason obviously. For a prospector it may be an old camp littered with ferrous trash. So you use a good discriminating detector. On most decent targets they will sort the good items from the bad with a high degree of accuracy. Nothing wrong with that. Just don't kid yourself that you are not missing targets. Specifically when nugget detecting the idea is not to just accept what the detector is telling you. If you get a weak ferrous reading, simply scraping the surface with your boot and removing an inch of material can make a ferrous reading flip to non-ferrous. Dig everything if you can, and if not, be skeptical of weak signals in bad ground. Remove enough soil to get a better signal if possible. If you look at many detectors you will see that the ferrous and non-ferrous range overlaps - this is exactly why. You also have to know your detector well. I have observed that European machines focus on simply digging non-ferrous targets, and proper identification is considered to be a bit of a waste of time. Too many possible targets over thousands of years. They excel at pulling non-ferrous out of ferrous but are generally poor at identifying this coin from that coin or that pull tab from a coin. U.S. detectors cater to the fact people hate to dig junk, and they like to tell a nickel from a pull tab from a dime. They are more conservative, and biased to calling borderline targets as ferrous. It boils down to knowing your detector. The F75 for instance. I will never forget a guy in the U.K. I met who was freaking out that a buried gold coin was reading ferrous on his F75 - totally blew his confidence in the machine. The F75 has a two tone ferrous / non-ferrous mode, the 2F mode. Ferrous goes low tone, non-ferrous high tone. Check your F75 manual and you will see it considers VDI 1 - 15 as ferrous. 2F mode gives a low tone on VDI 15 and lower, and higher tone on 16 and higher. Use 2F and you will dig very little ferrous stuff. The problem is that 2F is set at the high end of the overlap. It has been found that the F75 will actually read borderline non-ferrous targets all the way down to about VDI 6, and so the VDI 6 - 15 area is the overlap range. You have to avoid 2F and use single tone mode and manually set your disc to about 5 or 6. Or the way I hunt when nugget detecting is run in boost all metal and just investigate any target that pops 6 or higher on the screen on any pass of the coil. In other words, even a single pass of the coil can't be trusted, since the numbers jump around. I work the target and if it even jumps up once above my desired cutoff point it is worth checking out. Look for a reason to dig, instead of a reason to not dig. Running in 2F will cause many borderline targets, like that gold coin in the U.K., to be missed. If mineralization is very bad, as in the western U.S. or Australia, depth and target id accuracy of any VLF is severely impacted, and that is why so many prospectors use PI detectors or the GPZ 7000 and dig all targets. For coin hunters in the west, max depths of 5-6 inches are not unusual on coins, and I always chuckle when I see guys back east talking 10 inch dimes. Not going to happen here with a VLF. Air tests get little attention on this forum because for all intents and purposes they are worthless for predicting in ground performance in a gold prospecting scenario. All that matters is how a detector handles the ground and air tests ignore that all important factor. In fact, machines that air test the best often make poor prospecting detectors from a max depth perspective, though they are often hot on shallow targets. Big coils on a VLF make it worse (they see more ground relative to the target), so I lean to smaller coils. I also use a PI for coin detecting but that is a whole different subject. Bottom line is there are lots of old coins out there still waiting to be found due to over reliance on discrimination and not understanding exactly how it works. The real key is knowing exactly what the ferrous / non-ferrous overlap range is on your detector, and be wise to the fact that target id of weak targets is very unreliable. The worse the ground, the more unreliable the id. The video below features a T2 as part of the test, which is basically a F75. Be sure and watch the whole thing - there is a pause at one point that makes you think it is over. The guy is running in 2F and simply going to single tone mode and lowering the disc would probably change the entire nature of this video. It still is a good illustration however of the effects of mineralization. You can sum this whole thing up by something you hear a lot of coin hunters say - "Dig iffy targets". Too many people look for reasons not to dig instead of reasons to dig. Sure, you will dig more trash. But unless you have a rare virgin area these days you have to pull out the stops to make good finds. More on the subject - Tune Out Nails - You Will Miss Gold! Metal Detector Discrimination Really Sucks Metal Detectors With Reliable Target ID Numbers Discriminate, Discriminate, Discriminate! Garrett AT Pro Overlap Range - Note that although 40 is considered the normal start of the non-ferrous range, non-ferrous items can read down to 30 or lower. Detector manufacturers imply this is only tiny foil or gold, but it can also be any larger items at borderline depths. It is not so much what the size or composition of the target is, but the signal strength that the detector has to work with. Weak targets plus highly mineralized ground means any item can be identified as ferrous at borderline depths.
  8. 1 point
    It seems they are still finding a few little nuggets out there Paul. I doubt they will let you detect there but maybe you can go near? http://www.watoday.com.au/wa-news/gold-fever-in-wa-as-miner-digs-up-big-nuggets-20171102-gzdgmf.html What say the Prospectors already over there? Mitchel
  9. 1 point
    A couple of my finds from this summer, a tube shaped piece filled with quartz and calcite and an ammonite with and without shortwave light Both about 8"
  10. 1 point
    This note will probably take longer to read than the time I actually spent on the ground… but here goes… I was itching to get out between rain showers today… I think I may be in raingear for about a week if I want to get out and hunt… so I had a little time between con calls and took advantage of a break in the clouds at lunch I have this little park near my work.. it is a place that over the past year, I have pulled 21 wheaties and 4 silvers (lawnmower quarter, merc, rosie, war nick)… most in one corner of the park. I have covered this same ground with the AT Pro, Etrac, CTX, Explorer, ATX, and today, for the first time the Vaquero… with most of my coil combinations over the year. As you can imagine… the ground has quieted down a lot, since I also tend to dig some junk targets everytime I go out there. I usually spend 30 to 60 minutes hunting when I go… since I can get there and back to work fairly quickly. Anyway… I decided that today, rather than hitting a new tot lot in the area, I would take the Vaquero to “my park”. By the way, I have seen other detectorists there in my 12 months of going (AT Pro’s mostly) and I am sure other area detectorists have pounded this park over the years as well. It is a 1920’s park in the middle of the oldest neighborhood in my town, so it isn’t a secret to anyone looking. I wanted to see if I could get any new hits in the area I have hunted most, using the Vaq and the 5.75 widescan. Also, I grabbed a clad quarter and a copper penny out of my car to do some testing. My normal setup is to ground balance, then set a little negative, run in silent disc mode just above iron (but below nickel), sensitivity up around 8 or 10 and listen for the beep. Then thumb the disc to see where the target is sitting… take a guess as to the target and dig. I dug a piece of can slaw and a newly dropped bottle cap… but I wasn’t getting many solid signals. I finally got out into an open area that was pretty quiet on the machine and decided to drop my coins. I dug a 4” plug and placed the copper penny flat in the bottom, and covered it up. Then about a foot or so away, I dug a 7” plug (length of the lesche blade) and placed the quarter flat in the bottom… then covered it up. Grabbed my Vaq, and took a pass over the copper penny. A pretty solid signal, ringing all the way up into copper… definitely a digger. Then I passed over the quarter… nothing. I passed over it several times… occasionally getting a chirp, but nothing that said “target here”. I played with the sensitivity and re-ground balanced, even setting it more negative… and was able to get a little better response… but that also made the machine false all over… still the beep wasn’t something I could repeat on subsequent passes. So I decided to try putting the machine in all metal… I haven’t used this mode with the Vaquero, but had only read about the setup, so I wasn’t sure what to expect. I tried to set the threshold to a nice quiet hum, but it seemed to have only two options as I turned thee knob… on or off. So I set it to on… and proceeded to sweep the targets. Over the penny I got a nice response above the threshold… so went to the quarter… and it wasn’t as pronounced, but it was a solid bump in the thresh and repeatable in the exact spot I buried it. I switched back to disc mode, and the quarter was all but gone. So, armed with this new tool, I switched back into all metal and chose a line through my most heavily detected area toward my car… and hit a few threshold bumps and dug them to find some old rusty iron, or a pop top… each time checking the target in disc before I dug… they were iffy or silent in disc, but in each case I dug a target of some kind from the all metal/thresh bump response. Targets I would have walked over in disc mode. One target was completely silent in disc, but was giving me a nice mellow bump in all metal.. so I dug it to find a full ring pull (ring and beaver tail attached) at least 7 inches if not 8. So there is no issue with the Vaq going somewhat deep while in all metal. Of course, there is no way to tell what type of target you have, because you can’t get a hit in disc. Kinda like running the Pi machine. But here is where the story gets interesting. I got back to my car, and decided I had a few more minutes before I had to leave, so I grabbed the etrac out of the back loaded with the 13” Ultimate running the Andy S. pattern and headed out to my makeshift test garden in the middle of my park. To my credit it took me a little while to find it thanks to careful plug and replace technique as to maintain the park landscape. When I finally found the penny, it was a sweet multitone melody, solid hit in all directions, forward and back on the swing… but here is the kicker… while the conductive number was reading at 40, 41, 42 consistently… the ferrous number was reading 07, 08, 09… never up to 12… on a 4” copper target. Now, the tone was solid and sweet, and no way would I have passed that up… but still, I was surprised to see the ferrous numbers so low on such an easy target. So I moved over to the quarter at 7”. I thought there was no way I wasn’t going to get a solid tone using the Etrac with the 13” coil on a flat quarter… but I was wrong. I got a bit of a chirp on my first pass, then it was gone, I would get a chirp every 3rd or 4th pass, but scratchy. I shortened my swing, and targeted in on the chirp and finally was able to get a semi repeatable tone… enough that I would dig it in the wild during a hunt… but it wasn’t banging like a screen door by any stretch. I tried both in auto +3 and manual (22 I think) and was getting 16 or 17 in auto… but to difference in the tones from the quarter. And the most surprising thing… was that while the tone was ringing high… the id was reading in the 20’s for ferrous on 4 or 5 swings out of 8. Every now and then I would get a 12-46, but mostly it was 22 or 24 -45/46/47. I was shocked at the way the ground was impacting such an easy target. Anyway, to finish my version of War and Peace… I started thinking about all the iffy targets I walked over in the past with the etrac and ctx because I was putting too much emphasis on the id readings. I mean, I knew that at depth, the id would start moving, especially the ferrous id… but nice moist soil (granted, no halo because it was newly buried), laying flat, at 7”… I really thought it would be easy for the etrac, and even for the Vaquero in disc mode… but I was proven wrong. So I headed back toward the car, looking for a nice high tone squeak, with id readings with FE in the 20’s. I walked over one target that ended up being a rusty nail, but the next target came in as 22-41, with a high tone. It was a wheat penny, at about 5”, that I have detected over the top of at least a dozen times, if not more, and assumed it was iron, either by it being disc’d by the machine or it being disc’d by my brain. I just wish I would have had the Vaq with me to test it (left it in the car), both in disc and all metal, to see what it sounded like. So, in conclusion… I learned a valuable lesson today with the Vaq and the Etrac. How discrimination impacts depth, and how relying on the machines assumption of the target too heavily can potentially cause you to miss good targets. I am looking forward to taking another run at “My Park” with this new information to see what else I have missed. Also, I am happily surprised by the depth of the Vaquero in AM. At least in today's test and in my ground, it was as deep if not deeper than the etrac. Tim.
  11. 1 point
    Reg, Well folks, I don't think we are quite 'over' unless we make another thread but I want to know more about these machines and coils. The pictures you have shown us include Mr. Candy. I don't feel I have the proper right to call him Bruce but I will for the sake of brevity. Bruce was right with you in the beginning and provided you with some prototypes. Was he ever one to detect with you much? I think we would all like a bit of his personality injected here and then perhaps we can understand better the model changes (based upon your use I would assume) and of course the coils. Did anyone help Bruce with the coils? Would he ever want to comment on this thread? Mitchel
  12. 1 point
    Hi there Reg. It is easy for you to say that last sentence in hindsight. But if you hadn't of done it....well.... you won't die wondering.... what if. Best of luck & thanks for the journey. JW
  13. 1 point
    That dang logic...... hahahahaha... Good story and I have seen it played out in NV and CA...Where did it go????? lol
  14. 1 point
    I have a couple of machine/coil combinations that the swingweight could be described as "monolithic" based on that definition. ;)
  15. 1 point
    From 1991 at https://www.losttreasure.com/Home/FieldTestDetail/6071 "this new slim plastic control housing and the new brown 8-inch searchcoils incorporate a technical improvement called monolithic shielding. Imbedded in the plastic is a special material that helps shield both the coil and the electronics from extraneous signals-the result is fewer false responses." So instead of using a conductive paint inside the coil for electrostatic shielding the coil housings and even control housings themselves are made conductive by impregnating them with carbon fiber. Monte confirms this here: "In a March 18, 1991 Tesoro Dealer Newsletter, Tesoro described their new feature as this: Monolithically shielded searchcoils and control housings- an industry first from Tesoro! The shielding is a homogeneous part of the plastic, providing continuous control over external interference."
  16. 1 point
    In some weird way Tesoro uses "monolithic" to refer to the coil housing construction material, which in this case is carbon fiber. You will see Monolithic (Carbon Fiber) noted in Tesoro literature about the 9 x 8 coil though I have not been able to find an official explanation anywhere.
  17. 1 point
    Minelab Electronics From http://www.minelab.com/go-minelabbing/treasure-talk/equinox-technologies-part-2. This is the second installment in a blog series introducing and explaining the technologies inside our new EQUINOX detectors… (Read Part 1 here.) What actually is Multi-IQ technology? What does the name stand for? What frequencies does it use? Is “Multi” the same or different for the various Detecting Modes? Is Multi-IQ the same or different for EQUINOX 600 and EQUINOX 800? Why use a single frequency? How does EQUINOX perform in certain environments? How does EQUINOX perform compared to other Minelab detectors? How does EQUINOX perform against other brand detectors? These are some of the myriad of questions we have seen since we published our EQUINOX Product Notice in mid-September. Some of the answers will have to wait until Minelab publishes reports from our field testers and/or you get your own hands on a detector to try yourself. In the meantime, let’s look further into the aspects of Multi-IQ technology. Multi-IQ is derived from: Simultaneous Multi-Frequency In-phase and Quadrature Synchronous Demodulation. So, full marks to “Pimento” on the Thomas Dankowski Metal Detecting Forum for this great deduction: “I think the IQ part of Multi-IQ is not suggesting how Intelligent it is, but is alluding to the mathematical I and Q, representing the two quadrature (90 degrees apart) components of the signal, (which are then demodulated, a key part of most metal detector workings)” But, that doesn’t mean EQUINOX is not an intelligent detector as well! We can go to a statement from Dr Philip Wahrlich, our principal technology physicist, about a key difference of Multi-IQ compared to the demodulation taking place in conventional single frequency VLF detectors: “Within the Multi-IQ engine, the receiver is both phase-locked and amplitude-normalised to the transmitted magnetic field – rather than the electrical voltage driving the transmitted field. This field can be altered by the mineralisation in the soil (in both phase and amplitude), so if the receiver was only phased-locked to the driving voltage, this would result in inaccurate target IDs and a higher audible noise level. Locking the receiver to the actual transmitted field, across all frequencies simultaneously (by measuring the current through the coil) solves these issues, creating a very sensitive AND stable detector” Precisely measuring these extremely small current variations is quite remarkable if you consider the levels involved. It’s actually parts per billion, or nanoamp signals, we are talking about here! With Multi-IQ, we can derive much greater target ID accuracy and increased detecting performance, especially in ‘difficult’ ground. In ‘mild’ ground, single frequency may perform adequately, BUT depth and stable ID’s will be limited by ground noise; whereas the Multi-IQ simultaneous multi-frequency will achieve maximum depth with a very stable target signal. In ‘strong’ ground, single frequency will not be able to effectively separate the target signal, giving decreased results; whereas Multi-IQ will still detect at depth, losing a minimal amount of target accuracy. This is how we would generally represent the multi-frequency advantage, based on our engineering test data. Let’s hear more from Philip Wahrlich about the technical details: “For each frequency the detector transmits and receives there are two signals which can be extracted which we refer to as I and Q. The Q signal is most sensitive to targets, while the I signal is most sensitive to iron content. Traditional single-frequency metal detectors use the Q signal to detect targets, and then use the ratio of the I and Q signals to assess the characteristics of the target and assign a target ID. The problem with this approach is that the I signal is sensitive to the iron content of the soil. The target ID is always perturbed by the response from the soil, and as the signal from the target gets weaker, this perturbation becomes substantial. With some simplification here for brevity, if a detector transmits and receives on more than one frequency, it can ignore the soil sensitive I signals, and instead look at the multiple Q signals it receives in order to determine a target ID. That way, even for weak targets or highly mineralised soils, the target ID is far less perturbed by the response from the soil. This leads to very precise target IDs, both in mineralised soils and for targets at depth.” ……………………………………………………………………………………………………………………………………………………………………………. “How many simultaneous frequencies?” you may ask, wondering if this is a critical parameter. Minelab has been carrying out detailed investigations into this in recent years. Just as you can colour in a map with many colours, the minimum number to differentiate between adjacent countries is only 4 – a tough problem for mathematicians to prove, over many years. Similar to the map problem, it’s perhaps not the maximum number of frequencies needed to achieve an optimum result, but the minimum number that is more interesting. When it comes to frequencies in a detector, to cover all target types, how the frequencies are combined AND processed is now more important, with the latest detectors, than how many frequencies, for achieving even better results. Efficient new technology = lower power = lighter weight = higher performance. * 20 kHz and 40 kHz are not available as single operating frequencies in EQUINOX 600. The Multi-IQ frequency range shown applies to both EQUINOX 600 and 800. This diagram is representative only. Actual sensitivity levels will depend upon target types and sizes, ground conditions and detector settings. The above diagram is intended to be a simplified representation of how different frequencies of operation are better suited to different target types; i.e. low frequencies (e.g. 5kHz) are more responsive to high conductors (e.g. large silver targets) and high frequencies (e.g. 40kHz) are more responsive to low conductors (e.g. small gold nuggets). The EQUINOX 600 offers a choice of 3 single frequencies and the EQUINOX 800 offers the choice of 5 single frequencies. Both models also have simultaneous multi-frequency options that cover a much broader range of targets than any one single frequency can – and they’re different across the Detecting Modes! We’ll consider this further in Part 3…
  18. 1 point
  19. 1 point
    I want to look the part so that’s why I’m growing a long beard and hair. So a hundred years from now the’ll say my great great great Grandpa was a prospector. only a face a mother could love. Chuck
  20. 1 point
    Thank you Lunk, Dolan Dave, vanursepaul, bluthermal. Rockett : Used & tried a lot of settings as it was my first opportunity to try out the new Minelab update for the Zed, Factory settings work well but always try & see if you can get the Zed to run in Normal on the ground you are on. Jrbeatty : Yes was lot's of digging but i was lucky enough to find most of the gold in patches with only a small amount of rubbish targets, One patch of 31 small nuggies had 11 shotty pellets pretty much smack in the middle of the patch and no other rubbish anywhere. The 62 patch was only gold targets, did end up finding a boot tack about 20m away from the patch Cheers Ashley
  21. 1 point
    I bought a 2300 used with just over a year and a half of warranty left. I used it for a year and was starting to have problems with the knuckle being loose. I couldn't tighten it much more without feeling like something was going to break. I called up Minelab and they said send it in. Cost me $50 with insurance. A week later I got a brand new 2300. No complaints about having to pay the shipping back to them. Thank you Minelab!! I've also had a couple coils now, one from White's and one from Makro. Both with cable issues and each less than a year old. Both replaced with new ones. The White's I had to pay to send it in which I didn't mind since I bought it used. The Makro, which I also bought used... I just contacted them and was able to prove what the problem was and I got another about a week later. The one with the problem still works as long as I don't flex the cable in a certain spot, so it's a 'back-up' in case something happens with the new one. Thank you White's and Makro!! Thank you Steve Herschbach for providing a great classifieds forum where I have saved a lot of money buying from reputable members. Luke
  22. 1 point
    Yup , well said... This is about getting out and enjoying yourself.... It's not a competition.
  23. 1 point
    So i moved about 10 minutes away from my last home this past month. My new commute is along 10 miles of two of the oldest main highways in the area. One going east/west, the other north/south. They are just lined with 1700s homes, barns, and villages where my maps show the blacksmiths, churches, schools, etc, and looking at the buildings can easily see the converted schools. So many projects with a new to me/not new house...its like torture driving past, and not stopping when I see people outside, knowing I don't have time to detect on a weekend for a couple months anyways... just thought I would moan a bit and have you all feel sorry for me. :)
  24. 1 point
    Basically high frequencies are more sensitive to small/low conductive items but high frequencies also cause ground minerals to “light up”. This impedes maximum depth of detection on larger items. Lower frequencies are not as “hot” and so do not detect small items as well, but also see through ground minerals better. This adds a little depth on large/high conductive items. Classic examples are lower frequencies for silver (high conductive) coins and large items like cannon balls. Higher frequencies are the world of the small nugget hunter.
  25. 1 point
    Simple pulse induction ground balance is achieved by subtracting a late amplified ground sample from an early sample, ie, if the second sample is adjusted to equal the first sample then we have GB, but for most small bread & butter gold the nugget's signal in the early sample will be much higher than it's signal in the late sample so the audio goes high in tone. As the nugget size increases, we eventually get to the point where the nugget's signal in the late sample is greater than in the early sample and the audio then goes low. Size isn't the only determining factor though. In one case a solid smooth 12 grammer might give a low signal but a larger lump might give a high signal if it is made up of smaller bits all joined together or smaller bits joined to a larger mass or if it's a specimen. This is because the small bits increase the amplitude of the early signal relative to the late signal. It should be obvious by this that purity doesn't necessarily determine the tone. The ZED isn't a conventional PI and has to deal with an additional ground signal but the outcome is much the same. This is the basis for the TDI's time constant discrimination but it only works when used to ID solid man made objects such as coins and rings, mainly because irregular shaped nuggets and specimens can easily give the same signal as iron junk. If anyone is interested, Bruce Candy explains it well in a 1996 patent.
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