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  1. Looks like everyone is having a different copy version made of all the older Minelab technology. A definite sign Minelab needs to start filling the demand for newer better detector technologies unless of course they have hit a wall. I doubt that is the case as they have the largest electronics engineering team ever known for hobby detector development and have had these engineers on board for a long time now. Surprising they have had no new releases for such a long time in the gold detector series. So what has happened in comparison to the early years when the SD/GP/GPX releases were quite frequent, seems every 2 years or sooner then. Even though they were mostly minor upgrades until the GPX series they were enough to get the buyers interested. The GPX-5000 is about 14 years old and has been still a great selling detector, now it’s not available in the U.S. and you can only get a fake on the knock off marketplace now. SDC-2300 is 12 years old and still no Platypus coil for it. ZED is 9 years old. GM-1000 is 7 years old and still single frequency. So other companies have had plenty of time to make similar designs in a lower price range. Seems like we should have had had an upgraded wide variety and selection of the above mentioned models out by now. Give me a GPX-5500 in a light package and includes the SD2200d or original GPX-4500 depth range and Micks mods incorporated into it and you would have the professional gold hunter market covered. The GPX-6000 should have been called the GPX-auto lite since it has no larger coil options and would of been a great entry level for beginners with a lower price point than the above professional option mentioned. Hopefully things change for the better with the current Minelab corporate leadership and that they get back into the top player market again.
  2. I searched the internet but, still not sure What does SAT adjustment mean on a metal detector? What is SAT. Thanks, Joe
  3. I have been following the recent/current controversy about the new Rutus Versa & it’s performance. Iffy Signals standardized 3D separation/unmasking tests really lit a fire. I’m glad it did because it will benefit Rutus, the new Versa & anyone who is objective and thoughtful. I am not a big fan of Social Media but You tube has proved invaluable in speeding not only some hurt feelings, but reproof & useful information/instruction. I’m sure l would have eventually figured out how to correctly set up the machine to pass this test & more effectively unmask in iron trash. I already know to do this with the Legend, MXT, Anfibio, F5,,,well,,,all my other machines. Surprise? But the Versa is a little different in design for tone break/Disc/Iron volume and there is a lot of information detail lost in the translation of language. Are people too quick to put up videos? No, I want to see it in action. Are people to quick to give an opinion? No, I will consider the source & make up my own mind. Are the self appointed “experts” too quick to pass Final Judgment? Most certainly. We saw this same storyline with the Deus 2, Legend, Manticore, Equinox 900 and every other introduction. They have all been better explained/understood & improved upon, thanks to controversy and the reach & speed of Social Media and passionate users & responsive manufacturers. Dang, now l have to re-hunt those same areas where the Versa already pulled some masked targets out of that had been missed by my other properly adjusted machines.
  4. Just thought I’d share some of the original adds from the old PI adds. Maybe someone has even some older ones they could share. lot’s of familiar names from the hay days. 😃 Even found some Vlf adds.
  5. Not sure if this has been posted already but this sounds interesting. According to Woody who is the maker of this new detector, it will be light-years ahead of any other detector currently available. Due possibly this year. I have no idea if the mods he does are any good or if he can create something better than what companies with many emploees/$$$ have at their disposal but I'm rooting that he can. It has an 8-pin plug, wonder why?
  6. Did anyone make one of these way back when. 1955 Two Metal Detector Schematics_s_vs5.0_001.pdf
  7. Something new. Take a look at the English manual. Instr. za SmartPulse_EN.pdfInstr. za SmartPulse_EN.pdfInstr. za SmartPulse_EN.pdf
  8. Detector settings are sometimes called timings. Why? How can thinking about timings help me configure my detector
  9. I recently had a conversation with a well-known Electronic Prospector about companies, technology, etc. He stated that D/D coils go deeper than Concentric. If that's the case, why have all the PI Gold Hunters resorted to Mono coils? Bruce Candy and not Eric Foster invented Pulse Induction. The story I heard was Eric Foster first approached Whites with the PI Technology and was turned down. He then went to Minelab and the rest is History. Minelab sold Garrett the Technology to make the Axiom. I'd like to give Garrett a little more credit than that! Does anybody want to chime in?
  10. I see this question at least once every 3 months on this forum. It goes something like this...." Are dedicated single frequency gold prospecting detectors better than the latest do everything simultaneous multi frequency detectors for gold prospecting?" Maybe this bit of semi-real world testing will help some people. I wish I had a wider selection of dedicated gold prospecting detectors, especially a Garrett/Whites Gold Master 24K and a Fisher GoldBug 2. I don't. I do have a Gold Monster 1000 (for a little while) and an XP ORX with 9.5 X 5" HF coil and its great gold prospecting modes that even have a live threshold. So I tested those two detectors and used the XP ORX in 15.8 kHz to simulate several great 13 to 18 kHz detectors that have been used for gold prospecting including the Whites MXT, Fisher F75 and the Garrett AT Gold. I used the Nokta Legend in 20 kHz to simulate several 19 to 20 kHz detectors like the First Texas Gold Bug/F19/G2+/Time Ranger Pro series and the Nokta Multi Kruzer and Anfibio. I also used the Legend in 40 kHz, XP Deus 2 in Mono 45 kHz and the XP ORX in 74 kHz. The XP Deus 2 and Nokta Legend were also tested using their simultaneous multi frequency gold prospecting modes. I consider the Equinox 800 and Legend to have almost identical gold prospecting performance. Equinox 900 is slightly better from my experience and Manticore with its 8" coil appears to be even better. So, XP ORX with HF 9.5X5" elliptical coil, GM 1000 with 10X5" elliptical coil, XP Deus 2 with 9" round coil and Nokta Legend with 9.5X5" LG24 coil. I used the Nokta Legend stock headphones with wired connections for all detectors so that there would not be any variations in sound quality. All detectors were noise canceled, ground balanced (the Gold Monster used has the updated Quick Track) and all were used in 1 tone VCO audio with absolutely no target IDs rejected. Deus 2 45 kHz Mono was set on -6.4 discrimination. EMI was a problem so the single frequency detectors and selectable single frequency detectors were able to run higher sensitivity than the Legend using its SMF so keep that in mind when viewing the results. Plus I made a mistake recording the settings in the results below. The Legend using SMF Goldfield Multi had sensitivity on 23 of 30 not 25 as reported. It was fairly quiet at that 23 setting. I had to run Deus 2's SMF Goldfield at 95 just to compete and it was EMI noisy. I tried to run this test with the Manticore but I only had the stock 11" coil and EMI was unbearable. I used a 0.05 gram nugget and a 0.15 gram nugget under 1" of moderately to highly iron mineralized Arizona gold field dirt. This dirt's magnetite mineralization almost filled up both the ORX and Deus 2 iron mineralization meters. I used a 0.25 gram nugget under 3" of the same dirt. I used a 5 gram USA modern nickel under 4" of the same dirt Any depths reported beyond those were "air gap" depths swinging the coils a few to several inches above the top surface of the dirt. Here are the results: I wish I could have done this testing outdoors in the gold fields. Weather is definitely preventing that here in Colorado. Thanks for looking.
  11. I’d say my predictions for 2021 were pretty spot on, with only XP surprising me with the Deus 2. 2022 looks to be less exciting in a way, as all the excitement just happened. That and White’s left the scene entirely. So we have XP and Nokta/Makro already on the scene with their big 2022 reveals. I guess a PI from NM is next up, but as they have not even got a Legend to market yet, I can’t really imagine a new PI until next year. Minelab bounces back and forth between gold machine and coin machine focus, and with GPX 6000 in the bag, a new coin machine would look to be next, especially with the E-TRAC just being discontinued. But Minelab releases are almost always foreshadowed in Codan corporate reports, and no hints there yet. Watch closely for the next one, to see if there are any reveals. But lacking that I’d say fall at earliest, and possibly slipping into next spring, as these things often do. Again, watch the corporate reports. First Texas? Still just trying to get the beach PI out the door, and went awfully quiet on the gold nugget version. All of which is funny to me, as hardly anyone wants a new PI from FT, but something to compete with the newer multifrequency detectors. Lots of old model VLFs discontinued, I’d have to think replacements are in the works. The question with FT these days is their ability to execute on the top end, and no matter what they do, holding back while bugs get worked out is a good idea. Which leaves Garrett. They bought White’s, and except for continuing with the 24K we have seen little development on that front. No surprise really…. it takes a while to digest a purchase of that size. Personally, I do not expect any other White’s models to be revived. If they were that great White’s would still be here. Apex was a surprise, but as an Ace model it’s not the higher end model people here are looking for. Obviously in the works, but when? Garrett moves slowly, so I’m not holding my breath. I’m cautiously hopeful about the future with Garrett, but it’s very much a wait and see deal with them. So to sum up, not a lot to really hold one’s breath over after the Deus 2 and Legend introductions settle down. I admit my interest in new machines is waning, as we have hit some walls in the technologies, and real advances are going to be very rare at this point. Some hints dropped about bi-polar PI at Fisher, but given they can’t get an old tech PI out the door in short order, waiting around for that seems like a poor bet. In general, all I see coming in the future is better packaging, improvements in ease of use, more power at lower price, etc. But as far as actual power, I’ve already got most of the best of what is available, and I don’t see much in the way of genuine new capability coming my way. That’s fine though. Compared to what I started with 50 years ago we’ve come light years in capability, and I am quite satisfied with what I have now. All I need is to do is find new places to detect, not wait for new detectors. I suggest you do the same.
  12. From Wikipedia: "A long-range locator is a class of fraudulent devices purported to be a type of metal detector, supposedly able to detect a variety of substances, including gold, drugs and explosives; most are said to operate on a principle of resonance with the material being detected." There is more at the link, but "a class of fraudulent devices" says it all as far as I am concerned. I just wanted to post this so people can find it in the search results in case they are looking. For me these devices have always failed the most basic test... the experience of hundreds of thousands of prospectors and treasure hunters around the world. Treasure hunters and gold prospectors will give anything a try that might work, no matter how crazy it seems. If it works, the use soon spreads to other prospectors. You can Google genuine successful results for regular metal detectors all day long. The internet is full of successful people using normal metal detectors to make great finds. Except for a few obvious promotionals, the success stories of people using LRL devices are glaringly absent. All excuses for why this is so flies in the face of the simple common sense answer - they don't work. In almost 50 years of metal detecting and prospecting I have met a lot of successful people, and none of them got that way by relying on a long range locator. Part two of the common sense test is if they did work, there would be at least a few users of these devices that would be fabulously rich. The few I have met are anything but... just the opposite. Again, excuses made about why these rich LRL users are invisible fly in the face of common sense. Like wanting their privacy, as if we are not a country that brags about every tiny thing we can think of! The only people getting rich are the people selling these devices. I personally refuse to purchase anything from a company selling long range locators. It says something about the management of the company that makes me prefer to do business elsewhere. If you want the absolute best information on these device anywhere visit the website below. More at Geotech
  13. I do what I can to foster competition that develops alternatives to the all too common VLF detector. There are plenty of options out there, but in my opinion they all weigh too much or cost too much. Usually both. I envision people out there with a popular VLF metal detector for beach, relic, or gold detecting. These machines all sell for around $700 and weigh 2.5 - 3.9 lbs. Perhaps they would like to add a ground balancing PI (GBPI) to what they have. I think that for "normal people" with normal budgets a machine under $2K and under four pounds just makes sense. It would be more than twice what they spent for their VLF, and in this day and age there is no reason why a decent PI should weigh over 4 lbs. I am drawing the hard line at 5 lbs. I am setting under 4 lbs more as an aspirational goal that I think can be achieved, but recognize that battery power and coils are key inhibiting factors in high power PI systems that may make sacrifices in depth necessary to get total weight under 4 lbs. To clarify what I am talking about here, I should say that for many people a $700 VLF detector is a great place to start and in many cases is all a person ever needs. However, there are places where extreme ground mineralization and mineralized rocks (hot rocks) severely impede the performance and use of VLF detectors. Alternative technology to deal with these conditions has been developed, by far the most familiar being the Minelab ground balancing PI (GBPI) detectors. These differ from common PI detectors by having the ability to ground balance. Other brands have offered the Garrett Infinium (discontinued) plus Garrett ATX and the White's TDI models. These detectors are used not just for gold prospecting but also by relic hunters, beach detectorists, and others who face challenges regarding ground mineralization and VLF detectors. Frankly, in my opinion GBPI technology is largely maxed out. The main room for improvement comes now in better ergonomics at lower prices. This challenge therefore limits detectors to those that weigh under 4 pounds with battery included, and which sell brand new with warranty after discounts for under US$2000. Detectors need not be ground balancing PI models, but must offer similar ability to ignore mineralized ground and hot rocks that trouble VLF detectors. I am going to rate detectors as to their relative performance using what I call the "Minelab Rating Scale. Details here. 1. Minelab SD 2000 - crude first version, very poor on small gold, excellent on large deep gold 2. Minelab SD 2100 - vastly refined version of SD 2000 3. Minelab SD 2200 (all versions) - adds crude iron disc, ground tracking 4. Minelab GP Extreme - adds greatly improved sensitivity to small gold, overall performance boost. 5. Minelab GP 3000 - Refined GP Extreme 6. Minelab GP 3500 - Greatly refined GP 3000, last and best of analog models 7. Minelab GPX 4000 - First digital interface, rock solid threshold 8. Minelab GPX 4500 - Refined GPX 4000, solid performer 9. Minelab GPX 4800 - Released at same time as GPX 5000 as watered down version 10. Minelab GPX 5000 - Culmination of the series, current pinnacle of GBPI prospecting machine technology. All Minelab models leverage an existing base of over 100 coil options from tiny to huge. I am a very practical person when it comes to detecting. I know all the existing models and options by all brands very well, perhaps better than almost anyone. This is the way I look at it is this. If I personally were to spend a lot of money to go gold prospecting for one month, and needed a GBPI detector, considering machines past and present, what would I get and in what order of choice? Put aside concerns of age, warranty, etc. just assume functioning detectors. Here is the issue in a nutshell. On the Minelab scale of one to ten as listed above, I would be generous in rating the White's TDI SL as a 2. Same with the Garrett Infinium which I will mention in passing as it is no longer being made. If I was going to spend a month of my time and a lot of money going on a prospecting trip, I would choose a TDI in any version over the SD 2000. I might go with a TDI Pro over a SD 2100 but I would have to think real hard about that, and when push comes to shove I would go SD 2100 were it not for the realities of age I said to ignore. A newer TDI Pro might be a better bet than a very old SD 2100 from a reliability standpoint, but again, this would be a tough choice. The TDI SL not really. In my opinion I would be shooting myself in the foot to go on this hypothetical trip with a TDI SL instead of a SD 2100. You see the problem now? The Garrett ATX fares better. I would rate it a 3, roughly analogous to the SD 2200 variants. Still an agonizing choice really and the ATX being new versus SD 2200 being old might again be the tipping point, but from a pure prospecting options perspective the case can be made that the SD 2200 might be the better way to go. The problem for this challenge is the ATX weighs way over 4 lbs and sells for slightly over $2000. The price is close enough really but the 7 lb weight is way off. That's it folks. That is reality. The best of the best that the competition can offer can only go solidly up against models Minelab has not made in years. I am not saying that to be mean or as some kind of Minelab toadie, that is my pure unvarnished opinion as a guy who is pretty well versed on the subject. Let's bring it all home. This person with the $700 machine really, really wants that under 4 lb, under $2K GBPI machine, but if they do their homework they discover that truthfully, they would be better off shopping for a used Minelab than what the competition offers new. With the TDI SL rated as a 2 the ATX in a much lighter box at under $2K is a solid win as a 3. A well designed ATX with standard dry land coils would look very enticing as compared to the GP series Minelabs. But Garrett refuses to budge! White's can certainly do something, anything to improve the TDI SL. A battery that lasts all day would be a good start. In the end they are limited by the basic single channel design of the machine. The SD 2000 dual channel design was literally the answer to and the improvement on the single channel technology used in the TDI, the basics of which predate the SD 2000. Still, White's currently owns the under 4 lb under $2K GBPI category so they have the first out of the starting gate advantage. Anything they do would at the very least just show they have not given up. The Minelab MPS patent that formed the basis of the SD series has expired. Not sure about DVT, which formed the basis of the GP series. Where is the competition? What the heck is going on here? Much gnashing of teeth and pulling of hair is going on here, that's what!!! That is my challenge to the manufacturers. Under 4 lbs, under $2K, on the 1-10 scale I am offering, what is the best you can do? The TDI SL as a 2? Really? Yes, really, that is currently the best of the best in the brand new ground balancing PI, full warranty, under 4 lb, under $2k category. You can pick up a 3.5 lb TDI SL right now brand new for $1049. The White's TDI SL takes the crown. Note that a challenger has a half pound of weight they can add to the TDI SL and still make the 4 lb mark, and retail can be almost double the $1049 of the TDI SL and still come in at the 2K mark. I therefore do not think my challenge is outright crazy. Hopefully we will see more competition in this wide open category soon. I have been beating this drum for years to no avail, but I do have reason to believe we are finally going to see more alternatives soon. I hope. Maybe? All I know is I have had it. I sold both my 6.9 lb Garrett ATX and 7.2 lb Minelab GPZ 7000 and am boycotting metal detectors that weigh over 5 lbs from here on out. I don’t care how well they work, I simply refuse to buy such heavy beasts anymore. In the future I will support and give my dollars to companies that pay attention to and prioritize lightweight, more ergonomic designs. White's Electronics TSI SL metal detector
  14. I recently stumbled upon the use of the mono program by accident and noticed a lack of a specific data point in the mf programs. Although I understand the minimal variation in frequency multiples and the almost no importance other than to clean the signal from interference, I still noticed that between shift 0 and shift 6, the frequency can slip a lot. In my case, I suffer in saltwater from a difficulty in finding a sweet spot between 24 and 40 kHz or at least visualizing the actual setting. This is quite different from the autotune scan, believe me. I am referring to the lack of an exact kHz number that I justify with more frequencies working, but that does not help in understanding what level you are working at. If I take into account in mono 40 kHz with a 0 shift, I assume I am reaching about 32 kHz. In mf this should translate the same way with the unknown of the lowest frequency. There are missing pieces in this theory but the lack of the number of kHz relative to the shift in use does not help me.
  15. I'm hoping someone can help me out here. I'm not looking for Gold, but I need a detector to pick up some Copper wire. I have a Construction Company in South Texas and we are digging in areas that have buried pipelines. Several of these lines are fiberglass and have copper wire (as a tracer) is laid with these lines to be able to trace them later and prevent damage when excavation of the area is necessary. Normally, one can use a line-finder to locate them, but only if you know the beginning or termination points of the line. Because in those instances, where the line enters and exits the ground there are terminals to attach your ground enabling the line-finder to operate correctly and detect the copper line. In our situation we do not know where these entry or exit locations are, so we can only use metal detectors to find the steel pipelines, but it is not working for the fiberglass of course. I was thinking that since Copper is a Non-ferrous metal, as is Gold, that a Gold locator would work. Is my thinking correct? The real problem I believe, is in the fact that this Copper wire is around three (3) foot deep and only 10 gauge. It's not very large in diameter, but it is a continuous run. Does anyone have any suggestions as to the best Gold detector for my needs? Cost is of no concern as the cost of repair to the damaged lines will more than offset the cost of the detector. Thank you in advance for your time.
  16. Hi guys and Gals, I'm new here but been hunting since 1964. I'm an Radio Frequency Electronics Engineer. I design and build all kinds of Radio Frequency devices. I have been thinking about building my own pick up loop coils. I built some years ago when I worked for a fledgling metal detector company back in the MetroTec Days. If I recall correctly it was for a BFO type detector. I am now working with VLF Motion Detection and Descriminate type detectors, and a few Pulse Induction (PI) units. Most units operate between 3.0 and 40.0 KHz. Any input would be appreciated. Thank you 😊 Laurin the old SwampFox
  17. Update: Thanks to the good advice here I was able to remove the stickers from my cracked detector cover without damaging them. I applied heat from the inside of the old cover to protect the stickers from damage but I did overheat the plastic itself which is not a problem since it was cracked anyway. Any advice on what adhesive would be best for attaching the graphics to the replacement cover? I recently found a new control box cover for my old White's PI Pro detector but it is just clear plastic. I'd like to remove the decals/labels from the old cover (pictured) and put them on the new cover. Is there a solvent that would break down the adhesive without damaging the decals? Thanks for any suggestions on this.
  18. Hey y'all, There wasn't much going on today, my wife said "why don't you go detecting?" I'm not the kind of guy that says "are you sure?" 😀 I had something in mind and went and did it. If you've been reading my insane diatribes 🙄, you know I had a problem with my first remote (RC), sent it off to XP service, and it came back 11 days later. I had bought a second remote so there wouldn't be any downtime (yet another post), updated both of them to V2, and shipped the old one off. I've been wondering whether there have been any hidden changes in hardware, and was eager to find out. I bought my first remote in February 2022, and the second this past November. I sat down with both remotes and made sure the program I was using was exactly the same on both, kind of a painful process. 😀 What I'm using is a new program based on General, similar to my old Relic Reaper that V1 trashed. I built this program on the fly recently using some parameters from my summer beach program that was very successful. Heck it even works great on the farms here because there are salts everywhere, but I wanted manual ground balance which Beach Sensitive doesn't do well, and moisture subtraction. My ground balances from 67-80, usually around 76 when it's wet. Really no minerals at all. I never see any mineralization bars on the main screen, so I use XY for other info and audio response tells me size/depth. I used both remotes in the field right in front of my house, just gridded the farm about 10 feet past the underground power line and far enough away from my RV with WiFi, a spot with no EMI at all. I have to say from making many passes with both that there was no variance in the tones, bump sensitivity was exactly the same, and found there were no differences at all. 👍 That mission was accomplished. Now for an observation: The coolest thing was that because I had my WSA II headphones, the same pinpointer, and the same coil (11x13") connected to both RCs, all I had to do was throw the remote on and go. I guess the peripheral devices don't maintain the pairing records, only the RC does, so all other devices will work passively without re-pairing them if they have been connected before. Change out something and you will have to redo the first one, as you have deleted its pairing record with the RC. I really like that. 🙂 I didn't find any relics or coins in this spot, just some small trash: Headstamps, buck balls, the usual junk. The field in this area is pretty clean because it used to be the middle of the field, the turn zone was way behind my house. It has a lot of different conditions from clean to ridiculous, however. There was a farmhouse out there long ago. While I was out there an Amazon driver came and delivered the new glass screen protector kit from XP: https://www.amazon.com/gp/aw/d/B0C486BLPC It costs about 8 bucks but it is great. The screen on my old remote was scratched big time, but putting the glass protector over it covered everything with no bubbles. It looks relatively new now, and the screen has tempered glass over it. I don't know why they put the notch in the glass, maybe it's so you can get it out. I'm very pleased. 👍 Just for giggles I might roll back one of the remotes to V0.71 to see what differences there are, and post some more observations. It's easy enough to do. 🙂 While I was out doing all this, a guy came flying over the field in some sort of para-plane. 😀 Pretty cool. Here's a bonus sunset from last night: Happy new year! 🥳
  19. Hi everybody, this is Dave, I've been dabbling in metal detecting about 8 years now. Most of my experience is with PI units specially Lorenz (X6 and older models) for relic objects. Unfortunately, my X6 got serious damage and it is useless now. I am considering a Pulse Star II pro unit; my needs are for a PI unit that can detect a 25*25 cm (9inch by 9inch) object in the range of 2.5 m to 3 m (8 to 10 feet). Because of limited budget (under 3000$), and technical features I did choose Pulse Star ii Pro, but I could not find enough reviews on the unit. It would be great help if I can have your experience and feedback on it. Is it reliable? Robust? Can it meet my expectations (8 to 10 feet depth)? Also, do you suggest another PI unit in same budget? Appreciate your help very much. Good luck for you all.
  20. Can anyone tell me with a successful homemade metal detectors that finds gold. If you struggling with a homemade detector for finding gold if you need help i have many ideas to help.
  21. Gotta hand it to the dude taking the time- that said found on a youtube link back to someones homepage. Safe link Seriously it would appear, and forgive me for jumping to conclusions, but..I'm on the verge of being comfortable saying.......if you, and yes, I'm going for it..if you dig everything that crosses with any sort of constancy, you will dig trash, but you will also dig good things.. there. I said it frigging gold rings/beeps/vdi's from 1 to 70...perfect https://calabashdiggeradvenutres.uscreen.io/programs/gold-map-manticore-neu-c6295b?category_id=185966
  22. For background, relative novice here -- I've messed around lightly with an Ace 400 for a few years, and escalated the hobby with the Equinox 800 and Nokta Legend a few months ago. Tons of fun so far, and I'm ramping up my game finding coins, relics, and [knock on wood] tiny gold. I've also discovered I like comparing detectors and exploring their relative performance/outcomes and features. Anyways, question for the detecting veterans in this fine forum: What have been revolutionary detectors for you, and why? What changed the game after it hit the market? Best/worst quirks? What kind of history do you have detecting, etc.?
  23. Hi Folks, Thought I would start a thread showing my first attempt at an analog detector, I've been working in the electronics field for many years mostly in the analog/rf area. Hope everyone enjoys the process, and any input or suggestions would be appreciated. I'll try and post as I go along, but this is my after hours hobby, so updates may come every few weeks. I apologize if this goes overboard on the images. So here goes..... Here is the overall unit, the display will tip up and turn on. Closeup of the display Display tipped up, it will show RSSI across the top, and material ID in the center and across the bottom. Control Panel, has gain hi lo, discrimination on off, coil balance, threshold, volume, phone jack, and on off with lo bat indicator. Coil Actual board and display turned on and balanced, I'm sorry for the vertical image I couldn't straighten it up, the coil is under the paper, it's a hand wound 3" OD test coil. Note that this board has only three adjustments and the one in the above renderings has four, this one has no threshold adjust. 1957 silver quarter Gold chain and cross. Aluminum pull tab. Coke bottle cap. Clad quarter. My steel cutters. I'm getting parts in to start putting the new one together, hopefully my updates to the circuit will work out. We have a saying, "may have to shoot the engineer to finish the project", it feels like every other day I come up with another improvement :), anyway I hope you guys enjoy this, I'll post as I go along. -Sun-Boy
  24. Some of us are challenged by the 'technology' of metal detecting and don't have a clear understanding of what happens when we swing a coil. I'm in that category. I'm a 'user' and respond to the detector without thorough understanding of what is happening. I just read this description of how metal detectors work and it will probably change what I think about when I am now swinging a coil. Is this an accurate, basic description of how we hear a detected object? How Metal Detectors Work | HowStuffWorks
  25. Recently detected a ferrous rich old mining site for coins & relics using the Minelab EQX 900 experimenting with Park 1 in multi-frequency with factory settings except All Tunes and Iron Bias 2. A road crew was working within a 1/4 of a mile. The detector was definitely picking up EMI from the flagmen radio traffic. There is also an electrical power plant 4 miles line of sight to the north, an overhead high voltage electrical line 12 miles line of sight to the east and a mountaintop microwave station 14 miles line of sight to the northwest. Performed multiple frequency scans and adjusted the sensitivity down to 15 and below, neither reduced the EMI noise level. Five hours later the road crew departed but the EMI grew even stronger. (The power plant gearing up as folks return home from work?) The racket from the EMI was both tiring and annoying but I was able to separate out non-ferrous targets. I have detected this area for years with several single frequency & selectable frequency VLF detectors ranging from 15kHz to 54 KHz plus pulse induction detectors. I have never experienced this level of EMI in this area. I have been using Park 1 and Field 1 in an attempt to pull out deeper high conductors on heavy ferrous trash sites. Apparently that is a no go with SMF in either of these two search modes. The mining site is blanketed with ferrous trash, gold 1 & 2 would require a dig all approach without discrimination. It appears at this point the only option is Park 2 and Field 2 in either multi or single frequency. Has anyone else experienced this EMI problem with a SMF detector?
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