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Found 211 results

  1. How does IB detectors compare to VLF and PI's? Worth trying to build one or just a waste of time?
  2. I don't know if I'm right on this but I've found my Teknetics T2 to be a good guide to mineralisation at an area, I use its Fe3O4 meter as a guide. Would I be right in using that as a guide?
  3. I myself like the looks of screen of my MX Sport but not the weight. It would be great for it to trim some fat off of it. Out of all the ID numbers it has to offer I’d like to be able to notch out one at a time. We all know that different frequencies is better than others depending on what you’re detecting. If I can I’d like it to be multi frequency where I can run in all and single one if I do wish. What I want is a detector that it will do the major part of my detecting. My thing I’m a coin hunter first be it on a beach are around some old homestead . I’ve never been a relic hunter but it would have to offer the same for that person too . I love nugget hunting but it’s just not a lot of gold in Texas but it would be great to have some high frequencies to nugget hunt. I don’t see the need that I should have to buy another detector for what little I do get to nugget hunt. We all different and our wants runs different too.I know too it’s other detectors offer the things I’m wanting from White’s right now but I’d like to see America made on the side. Chuck
  4. The whole depth with VLF detectors thing in my opinion has been nothing but a red herring for decades. I have read a thousand posts from people wanting VLF detectors with "more depth". Yet VLF detectors maxed out for usable depth by at least 1990 if not before. I have not used any VLF metal detector since 1990 that got more depth on coins than my Compass Gold Scanner Pro. The only real improvement we have seen and are still seeing is in the ability to find and correctly identify items that are masked by the ground itself or adjacent undesirable targets. There are an amazing number of targets in the ground at depths achievable by any decent detector made in the last 25 years, but that are being missed because they are improperly identified and ignored or just completely masked and invisible. This is an area where the Minelab BBS and FBS detectors have excelled. They do not go deeper. They simply get more accurate discrimination at depths exceeding what most detectors achieve. Machines like the DEUS and a lot of other Euro machines are excelling not for the depth they get, but this ability to acquire and accurately identify targets at shallower depths that are missed by other detectors. If we had a detector that could simply see through everything and accurately identify coins to 10" the ground would light up with countless missed finds. I get a chuckle out of all the deep coins I see people talk about on the forums when the best detectors made can't accurately identify a dime past 5-6 inches in my soil. Anything deeper just gets called ferrous. There is huge room for improvement in metal detectors still not by getting more depth, but by simply finding shallower targets that have been missed by other detectors made up until now. How To Make Yourself Crazy! U.S. Versus Euro Style Detectors
  5. Published on Jan 19, 2019 - Just a quick video showing the benefits of the Vista Gold running at a higher kHz and using zero gain in highly mineralised soil Here are the videos, after further testing I can confirm that the 15 kHz hits stronger on deep silver in clean Non Mineralised Soil and both are exactly the same on the gold coin at depth in Non Mineralised Soil.
  6. Deep in the depths of winter here, I found myself partaking in some serious speculating. With all the controversy of whether or not the Equinox is multi frequency or not, I figure I'd bring some wood to keep warm lol. Some of you may recall in one of those threads I was trying to explain that the waveform we see can actually be comprised of more then one, two, three or more frequencies. Additionally I pondered if the multi frequency processing could just be done on the receive side using typical sinusoidal waves that are actually doing the work. Nonetheless here is the transmit side, the side that actually excites the target. Below you will see a FFT (Fast Fourier Transform) of the Equinox in Gold2. The scale goes from DC to 125 kHz. (Left to right) If you consider the advertised range of Multi-IQ frequencies as being 5 kHz to 40 kHz, you might be satisfied by this as the left half of this 125kHz graph is filled out nicely. There is even a couple little peaks up around 100 kHz, whether or not that is utilized I don't know. I'm way off base as to how MIneslab actually does this, but I just wanted to show the kind of information that can be extracted from these signals. I am not trying to prove anything specific other then to say I don't think Minelab is being misleading IMO. Assume something is a little off with my measuring, still that looks like multi-something. The approximate frequency peaks of interest measured from left to right are: -2.5 kHz -8 kHz -13 kHz -18 kHz -23.5 kHz -28.5 kHz -33.5 kHz -39 kHz -44 kHz -50 kHz -54 kHz -59.5 kHz That covers the advertised range of frequencies which exist on the left hand side of the graph, (Midpoint is 62.5 kHz) I wont bother with the higher frequency stuff as it may not be relevant. It doesn't really hit any of the single frequencies, on the other hand Minelab does not explicitly say what frequencies are used in Multi-IQ. (That I know of.) I am happy to see that low frequency response. I was thinking the Equinox was going to be all 8 kHz and higher, which it basically is, but I'm glad to see the 2.5 kHz peak right beside it and of almost equal strength.
  7. This detector is all but certain to appear, and probably before the end of 2019. I have been on a quest to get a high power ground balancing pulse induction metal detector that is reasonably light in weight and in a somewhat standard metal detector housing, preferably waterproof. Whatever detectors I personally use must have dealers and service support in the U.S. The challenge I have for Fisher or anyone else is to make a dry land ground balancing PI that weighs under 4 lbs yet is more powerful than a TDI SL. The alternative is waterproof but under 5 lbs. The price must be under US$2000.00 Waterproof Pulse Induction Metal Detectors Compared The Fisher Aqua Manta (probably not what it will be called) has been rumored for some time, and confirmed by First Texas as a project nearing completion. Prior threads: January 2015 New Fisher Pulse Induction January 2018 New First Texas PI Under Development June 2018 Aqua Manta Pulse Induction Beach Detector The long story short is this is a project by Alexandre Tartar. The Manta is most likely an offshoot and improvement on the orginal Eric Foster Goldscan circuit. Alexandre has built at least three major prototype devices before the rights were acquired by First Texas. The following photos and information is derived from this thread where the V3 prototype is sold. Here are the basic specs as described in advertisement (the seller is French and translating): "I sell a "prototype" Manta v3 There are only three copies of this detector and it is the best of three .... (See mantametaldetectors website) Pulse induction, works exclusively with mono coils to the beach, possibly for the land, but no ground control Calibrated for low conductors, gold and platinum, among other. Delay 7us of 17 volts more sensitive, deeper and faster than Deepstar Equipped with a coil, Manta, latest generation she has one month, the quietest and most efficient on the market, all brands included. (it will operate on TDI and Deepstar) Connector Type TDI, it accepts all coils (mono) of TDI / GPX Weight: 1.5 kg without battery that is worn at the belt headphone jack and on / off switch on the battery pack (lipo) supplied charger more than six hours of detection at full power. Carbon Rod Anderson + extra cane down braided nylon belt military style All the possible settings and need a good PI SAT speed, TX frequency, noise threshold, delay, volume, sensitivity.... The delay was 7us , lets see gold ends very thin rings, earrings, jewelry hollow that other detectors can not see and of course, the wholesale jewelry it goes deeper Ferrous recognition by a double beep well marked" What I find interesting is this note "Pulse induction, works exclusively with mono coils to the beach, possibly for the land, but no ground control" Yet here is the picture that accompanies the advertisement. Now remember this is from March 2016, almost three years ago. The prototype clearly has labels for ground controls... Alexandre Tartar Manta V3.0 prototype The control markings as seen above: Volume Threshold Sensitivity Sat Speed. Motion. (recovery speed) Tx Frequency (transmit frequency, usually to offset for EMI mitigation) Pulse Delay. GB Type (the shorter the pulse delay, the more sensitive to tiny metal and salt water) Ground Balance (usually a ground balance control, but ad says this is lacking?) Statements by First Texas suggest version 1 of the new machine is aimed at beach use and may not be suitable for land use (gold prospecting). That in turn makes me think work on the ground balance system is lagging and may be key to the future of the machine. Will it be beach only, or have a future for gold prospecting? I have to assume the unit will be competitive when it comes to the horsepower, or why bother? Until now the Eric Foster Deepstar is generally acknowledged as one of the deepest beach PI detector’s ever made. And the ad says “more sensitive, deeper and faster than Deepstar”. That being the case what really has my interest is the weight and compactness being displayed. The following photo collage from the advertisement shows the size of the control box and belt mounted battery: Alexandre Tartar Manta V3.0 prototype Granted the battery is belt mounted, but that is one tiny control box. I have to think that First Texas can slim down the circuit board and use a top notch integrated rechargeable battery and get this machine into a very compact package - hopefully waterproof and with wireless headphone capability built in. Well, that's about all I know about this one. This thread will collect any new information as it is available. This is one of a couple detectors I am watching so fingers crossed for a 2019 release. It is encouraging that Alexandre's original website at http://www.mantametaldetectors.com/ has been taken over by First Texas and is displaying this banner: Fisher Research Labs - New Pulse Induction metal detector COMING SOON!
  8. Steve Herschbach

    Minelab Metal Detector Terminology

    Version KBA 04-1 2010


    Metal Detecting Terminology (Minelab) 2010 Knowledge Base Article KBA 04-1, 1.65 MB pdf file, 17 pages Metal detecting terminology and definitions, with an emphasis on Minelab technology wording and descriptions. Minelab Metal Detector Forum
  9. Steve Herschbach

    Metal Detector Basics And Theory

    Version by Bruce Candy, Minelab


    Metal Detector Basics And Theory by Bruce Candy, Minelab 1.42 MB pdf file, 24 pages Bruce is a co-founder of Minelab and the man behind their most advanced designs. This information delves into much greater detail than the above link and has many more illustrations and diagrams. Minelab Metal Detector Forum
  10. Steve Herschbach

    Gold Prospecting With A VLF Metal Detector

    Version by Dave Johnson, First Texas


    Gold Prospecting With A VLF Metal Detector by Dave Johnson, First Texas 10 Mar 2010 Edition, 2.93 MB pdf file, 56 pages Dave is the Chief Designer for First Texas Products and has been involved in designing most of the VLF gold prospecting detectors sold over the last 30 years. This is an excellent primer on using VLF detectors to prospect for gold. First Texas (Bounty Hunter, Fisher, Teknetics) Forum
  11. Steve Herschbach

    Fisher Intelligence 5th Edition

    Version by Thomas Dankowski, Fisher Labs


    Fisher Intelligence - Advancing the Hobby of Metal Detecting by Thomas J. Dankowski, Fisher Labs 5th Edition 04/2006, 6 MB pdf file, 48 pages Thought provoking articles on aspects of metal detecting not often talked about. First Texas (Fisher) Forum
  12. Version FRL870295A 3rd Ed 1993


    Advanced Nugget Hunting With the Fisher Gold Bug Metal Detector by Pieter Heydelaar & Dave Johnson, Fisher Labs 3rd Printing Jan 1993, 2.36 MB pdf file, 46 pages This out-of-print book is a good basic text on gold nugget detecting. Although it uses the original Fisher Gold Bug as an example the information applies to most nugget detectors. Part 2 by David Johnson is an excellent primer on hot rocks. First Texas (Fisher) Forum
  13. Version 2010


    Tesoro 2010 Metal Detector Information #22, 2.61 MB pdf file, 64 pages This detector catalog and field reviews is packed full of extra information that will be of interest to anybody who has or is thinking of getting a metal detector. Lots of good answers to basic questions. Tesoro Metal Detector Forum
  14. Anyone out there know any information on this machine ? It supposed to be being tested and could be really interesting when released . May be able to discriminate Iron out . You Tube this . AQUAMANTA A1 TESTS HARDELOT . All in capitals . It is compared to the Sovereign and CTX , the Aqua is the last one tested . Unfortunately LIKE the Equinox most of the time before release , its in a foreign language .
  15. Always thought it would be a good book to read and study.
  16. Can someone explain to me what makes this new Anfibio different from a X TERRA 705 the 705 can run three different frequencies all be it you have to change coils to be able to run any of the three different frequencies it can run the Anfibio you push a button to change frequencies but with that being said I also know I can purchase a coil from a manufacturer that pretty much allows me to run one coil on the 705 and just by turning the 705 off and back on in a short time period it changes to one of the different frequencies that the 705 can run in in other words one single coil will run 3 KHz,7.5 KHz,and 18.75 KHz all done with just one coil so can someone please explain how the Anfibio is any different from the X TERRA 705 and not trying to start a bashing war here just trying to understand how the Anfibio is much different from the 705.
  17. I've been trying to make a PI detector as a learning exercise in another forum(Geotech). Asked the question below but haven't got a reply. Maybe someone here could answer the question. Nugget sizing info: We are often asked how many pieces per gram or ounce. It is very hard to predict how many pieces there are per gram or ounce as the # of nuggets by weight varies quite a bit per batch. But in general you can expect around 1-2 pieces of gold for 4 mesh, 2-4 pieces of 6 mesh per gram, 7-12 pieces of 8 mesh per gram and around 15-20 per gram for 10 mesh. You can expect many more pieces for smaller 12 (around 20-25), 14-16 (around 30-50 or more) pieces and hundreds for fine gold. Every batch is very different and each piece of gold is natural and of course therefore unique. Some may be flat and light or rounded and very dense (heavy). How small a nugget can a good PI detect? What mesh size would make good test targets for smaller nuggets? 8 mesh, 10 mesh, both or other? Any guess on typical TC for 8 or 10 mesh nuggets?
  18. I was just wondering if you had the opportunity to test a new detector before it came on the market would you be willing to do it ? Most of the time it’s given to people you could say that their name is in lights . We have so many people that has been swinging a detector for years that are more qualified than the so call star . Let me hear your view point on this subject . If you ever have the pleasure or opportunity to do it in the pass let us hear that too . Chuck
  19. This is something that has me a little perplexed, especially when a whole raft of opposition detectors from abroad are offering such an option on their detector platforms. How easy would it be to improve current popular models like the F75, AT Pro, etc with additional frequencies to make some US made detectors a more attractive proposition, or are we talking about the requirement for a completely new platform for this to happen ( too much cost for not enough return)? If just worries me when we see little or no response at all on trying to compete on the selectable frequency front. Some may say the market is already flooded with such detectors, though if you do not offer up an alternative to just single frequency VLF's, then customers may look elsewhere for detector platforms offering more flexibility/features for the money. Some of the selectable frequency detectors made abroad: Minelab Equinox (plus multi) Minelab 705 (coil change for different frequencies) Rutus Alter71 XP Deus/Orx Makro Kruzer Multi Nokta Impact Nokta Anfibio multi ...and many other lesser known Euro manufacturers with at least dual frequencies. It is evident that there are two distinct lines of thinking when it comes to producing a detector, either make one that has the capability of covering all or most fields of detecting (ie. prospecting, relic hunting, coin shooting, beach detecting), or produce several detectors, each with a specific purpose. The obvious downside is the sheer cost of owning a whole raft of detectors for specific purposes, something that used to be common place, though now not such an issue with the advent of very capable multi-use detectors suitable for low conductors right through to sub gram gold. Will be interested to see other views on the subject, have we seen the end of single use or specialist detectors, and whether multi-role/multi or selectable frequency detectors will rule going forward.
  20. This coming new year provides an interesting contrast between two companies who’s fortune rests on technology. One company quite established that has either by choice or constraint had a rather stagnant new technology history. The other a new startup that feels that it has a new technology. And is entering the marketplace at a price point that would be considered by most as a Flagship statement model. While the Minelab Equinox has pressured the lowering of prices for some competitors, Tarsacci has demonstrated the confidence to offer a product at close to double the price of the Equinox’s. If Tarsacci were a new company with limited experience in metal detector design and manufacturing, then success might be more tenuous. However the principal engineer has a strong background for the task at hand. On the other hand if Tesoro had the engineering horsepower then I would place my bets on them, as standing up a new company is usually riskier than re-invigorating a known entity. I’m really sad to say that Tesoro evokes a woulda, coulda, shoulda of Technology from me.
  21. It is so many single frequency detectors out there and yes some do have more you can access. It really don’t make any difference it’s still one frequency at a time. What I can’t understand is more are being made and if not on the market already like we’ve seen this year . It will be another nugget and coin detector should be out by the end of November. Oh it’s telling how many frequency you can hunt in but still one at a time. I know I sound like a broken record saying one at a time but that’s the truth of the matter. When Minelab came out with the Equinox they raised the bar at a higher level that others have yet to reach . This is what all of the other detector companies have to strive for . If they can just equal the Equinox will keep them in the running. I don’t see Minelab just sitting back without looking at the Equinox saying how can we make it better. I myself is swinging a single frequency detector and I do like it . I’m not saying they don’t have a place in the detector market but over time will be less and less . I’ve owned a Equinox 800 and I loved it but had it with the wait on a small coil so I sold it. If some others don’t come out with something to equal it in early 2019 I’ll get me another Nox . Chuck
  22. Hey guys, do the ground balance numbers indicate mineralization? And if so how do the numbers correlate.
  23. afreakofnature

    Dumb Question

    For some reason I have never turned on my machines in the house, i always go out in the field, or for VLFs the yard, and turned on there to learn. I was curious if you turned on your machines like the Zed, PIs and VLFs inside, would it hurt the electroincs? Especially if its constanly overloading or going off on all the crazy EMI. I just want to turn on to play with the settings and practice more with the buttons, etc.. Not actually detect. Funny been detecting now for 5 years and never bothered to ask or try
  24. For me to want wireless coils the cost needs to come down lots . If I can keep buying wired coils for about a third of the cost of wireless ones that alone is enough as far as I’m concerned. Wireless headphones is something I don’t leave home without it and it’s something all can afford. Chuck
  25. I always have my ears perked up for something new in metal detectors and metal detecting technology. I confess to not being smart enough to really get deep into the technical side of it but I have a general layman's knowledge of the subject. A couple years ago Carl Moreland, the Engineering Manager for White's Electronics, was interviewed on a radio show. I tripped over a reference to the interview on another forum and checked it out. It is very long, and near the end Carl dropped a bombshell. At least I thought so, but it went unnoticed and uncommented on in the metal detecting online world. I thought about posting it on a forum back then but decided to wait and see what developed. Here is the applicable portion of the interview: Relic Roundup Radio Show, January 17, 2012, Interview with Carl Moreland, Engineering Manager, White’s Electronics http://en.1000mikes.com/app/archiveEntry.xhtml?archiveEntryId=260469 Transcript beginning at 50:57 mark: Carl Moreland - “I can mention one technology that we’re working on because the patent has already been published… or the application, not the patent hasn't gone through yet. We’re working on something called half sine technology, which has actually been around since the 1960’s in geophysical prospecting applications. This is where instead of transmitting a sinusoidal signal you actually just transmit half of the sine and you can do that at extremely high voltages and high ? rates and so on. It’s technically not pulse induction but it’s not VLF either and it is a time domain method. And with that we can get really good depth and we can even get target id information and do discrimination and so forth.” Can you see why I perked up at that? I am still amazed it did not get any notice at the time. Nothing happened for a long time. Then I got this PM from Rick Kempf recently: Sent 29 January 2014 - 09:04 AM Was looking for info on my new SD 2100 this AM when I sort of fell down a rabbit hole of old forum posts and emerged reading Whites new patent. About the first thing I noticed was that you were cited in "prior art". Here's what they cited: http://www.voy.com/76600/7/475.html The patent is here: http://www.google.com/patents/US20110316541 Is this something you knew about? Just wondering. Rick Kempf I told Rick, yeah, heard about that. It was the patent finally being granted from the application Carl mentions in the interview. It was fun getting a mention in a patent though I think it was just the examiner studying up on the subject and finding my old post helpful in simplifying the subject. For a long time the Holy Grail in metal detecting has been something that combines the target identification of an Induction Balance (IB or more commonly known as VLF) detector with depth of a Pulse Induction (PI) detector. There have been many promises and false starts over the years, and that was one reason I kept the radio interview mention quiet the last couple years. Frankly, I had half forgot about it until Rick brought the patent being granted to my attention. Notice the title: Hybrid Induction Balance/Pulse Induction Metal Detector A new hybrid metal detector combines induction balance and pulse induction technologies. Target signals are generated from a transmitted wave that has both induction balance and pulse current inducing characteristics and uses pertinent sampling of the receive data. Combining the two data sources provides eddy current target identification while excluding ground permeability and remanence obscuration. Is it time to sing Hallelujah? Well, there is a big gap in between getting a patent and bringing a detector to market. Many patents get filed and you never even see something directly related to the patent. Maybe it looked good on paper but does not pan out well in reality for numerous reasons. So just because White's was granted this patent does not mean something is around the corner. However, they have been working on it for over two years already obviously. And it has been some time since White's put something new out. I do not count remakes of the MXT etc as new. So I think there is reason to be hopeful we may see something one of these days. John Earle is one of the unsung heros in the industry. He had a hand in many of the best products at Compass Electronics before moving over to White's after Compass went under. To this day I have never used a VLF that goes any deeper than my old Compass Gold Scanner Pro. John was one of the brains involved in that, as well as the White's Goldmaster 3, regarded by many as being the pinnacle of the analog development of that model line. I was fortunate to have met John at the factory some years ago. He is listed as the inventor on the new patent. Half sine technology is also mentioned in an earlier patent filed by White's, again with John listed as inventor at http://www.freepatentsonline.com/7649356.pdf Looks like serious stuff brewing. Bruce Candy of Minelab makes mention of half sine technology in a patent application at http://patents.com/us-20130154649.html which makes me wonder about the new "Super Gold Detector" he is working on. But it is this most recent patent by White's that seems to put the finest point on it. Maybe the Holy Grail of detecting is soon to be a reality. The fact it is White's certainly gives me more hope than what we have seen in the past. Edit May 2015 - see also White's patent for Constant Current Metal Detector