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tboykin

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tboykin last won the day on November 14 2018

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  1. I’ve run into this since I am probably a little rough with pushing the coil into bushes and scraping the ground. On really steep hillsides I will actually twist the coil on purpose to get a more comfortable swing off to one side of my body. I mostly have been detecting wooded hillsides for pocket gold so it probably won’t be an issue in the desert or flatlands. It’s a minor annoyance along with the little rubber headphone cover popping off and the EMI sensitivity. Especially considering how easy the GPX makes it to find gold compared to other machines I’ve used.
  2. I spent about ten hours total detecting with my GPX6000 in Southern Oregon. Got three small bits for 1.2 grams total. Sensitivity is great, ground balance is a little finicky with the mono coil, but holy balls the EMI was bad. The way they hooked up the speaker made it so I had to use headphones. Maybe the amp is too close to the sensitive stuff, but as soon as I switched to the speaker the machine started going off. Lucky for me it was only 101 degrees so I just wore the nice black headphones. The chunkier .7g piece was at least six inches down! The GPX did sound off on some of the andesite and hotter serpentine but the ground is murder for most machines so I am fairly happy. It’s a keeper as long as they can fix the speaker issue. “Just don’t use it” is not going to work for me in bear country. But the second day the EMI was not as bad when I checked the speaker.
  3. I could not use my GPX yesterday with the speaker due to noise. To test this I sat down, and let the detector hum without any movement for about a minute. Then I switched to the supplied Bluetooth headphones. The pitch variation was worse with the speaker. At about 101F it was too hot for headphones but I was left with no choice. I repeated this test today earlier in the day and the speaker seemed to effect the threshold less. My guess is that the amplifier and speaker windings are inducing noise somehow. I will write Minelab about this issue since after spending six thousand dollars I would really like to use the speaker. However since today I could not replicate the issue, it may only happen during bouts of bad EMI or maybe the component just needed some time to bed into the pcb. If the issue persists I will send it in for repair or request a solution. I am very surprised Minelab released this detector with the issue since I’ve seen others report the same thing.
  4. The EQ800 is the best option for the area you described. It can somewhat discriminate iron, which PI machines cannot. However it may be that gold is too fine or disseminated to pickup on a detector. In this case I would use the detector as more of a mineralization detector, and listen for ground responses on unprocessed ore. It may turn out that these samples can be crushed to reveal fine gold within. It takes a lot of research to find sites with big enough gold to detect, sparse enough trash to detect it, and also have it shallow enough to not require scraping with a dozer. But many hard rock mines had fine enough gold that it would be difficult to find with even the most sensitive detector.
  5. The magnets I use on my picks are rated in the hundreds of pounds of pull force. They can pull nails out of the ground as long as they aren't deeper than 1-2". I think the 13lb force would be enough to stick on your fridge and that's about it.
  6. The best improvements they could make would be: 1. Wireless audio. I was not given a necessary budget to include a Qualcomm aptX LL chip, though we did have a prototype built with it included! 2. Improve coil manufacturing. White's process involved a lot of 1970's technology, with no automation - all hand-made and tuned. Watching the production workers hand tune the coils with ferrite, wire, and foil made me wince every time. Did you know that the dielectric constant of epoxy changes over temperature? 3. Improve the battery system and housing. A rechargeable LiPO will be cheaper to manufacture, and the plastic housing is finicky in the current version. The 24k was the only real "new" detector I got to head up development for at White's (I don't count the MX7 and TDI BH since they were not new). I really hope Garrett can continue some of the other projects we had going when I left. They need to focus more performance than marketing to keep up with Minelab.
  7. It's like the Big Lez Show... but with gold nuggets. On ya for sharing, mate.
  8. We tried really hard to get this prototype back up and running for two years. However, due to the lack of proper documentation and engineering turnover it was very difficult. The knowledge didn’t get written down, passed down, or shared. It was all locked up in the brains of people who no longer worked at White’s! The biggest lesson I learned from that is when you have a project, document it. Without documentation it might as well not exist. When the company’s engineering documentation consists of a shoe box full of pcb’s, paper notebooks and seven different “SMPI firmware v2 copy3.bin” files on a server it is really tough to put together. After a while we were able to get it to power on and detect a quarter about 4 inches off the coil. Was it the right coil? Again, referring to the hand drawn diagram on page 52 in a college ruled notebook... maybe? The hybrid was the one branch of technology I pushed really hard for and the staff we had gave 100%. But the lack of documentation made it like putting together a box full of legos with no instructions. It was extremely frustrating. But I think for every concept that makes it to market there are a bunch that end up in a similar engineering purgatory. It’s a shame the project wasn’t properly documented, it might have saved White’s! But I kinda doubt it. Having new tech would have helped the company along a few more years but the problems were much bigger than engineering not finishing projects.
  9. Steve I have been using VLF's to find gold for only four years, but I hunt wooded areas a lot. You have to be willing to do more research, dig more holes, and work harder than the other guys. Every time I've been lazy I walk away with less gold. If the spot is hard to get to, trashy, or requires moving overburden I have a better chance. Most people are lazy, or older, or too out of shape to clear off a few hundred square feet of good ground to detect or even hike a few miles uphill to get to the good spots. They want a place they can drive right up to, get out and in ten feet find nuggets on the surface. Or places accessible to side by sides or quads. Go where they can't go! While placer gold is often found on bedrock, you can also find pocket gold with a VLF. Most of the pieces I've found in the past two years have been pocket gold, from eroded veins exposed by soil depletion and erosion. If you are looking for placer gold you will do best by finding areas with about 4-8 inches of hard pack or overburden on top of bedrock. Shale, slate, or serpentine with vertical orientation is a natural gold trap. For old workings make sure to check their tailings, and keep in mind they were either classifying or hand stacking muddy rocks. Mud can trap gold and after 150 years of rain some gets washed out. Similarly, specimen gold would sometimes roll all the way down their long toms or sluices since it was too light to get caught in the riffles. So check where the sluice dumped out. Also check the edges of the workings where the giants couldn't wash, or they just stopped the work. Tree roots, islands of unworked material, and crevices may hold nuggets. But they also hold a lot of trash. River bottoms can be tough for VLF's since the bedrock is often hot. So I usually look for places with just enough original overburden to give me a buffer as well as possibly hold some nuggets. When I first started detecting for gold I dug about 200 pieces of trash per nugget. I have a few ounces now but I still dig about 50-75 pieces of trash per nugget. That's the nature of it I guess.
  10. I found this on a quick adventure in between jobs. It’s the prettiest nugget in my collection. Weighs under a gram but man it was fun! I found that running the EQ800 in single frequency really helped stability in this red hot ground. Here it is fresh out of the ground. On the 6 inch coil which helped me get between boulders to find it. After some toothbrush action almost looks like one of the 50 fired bullets I found today. But I’ll call it a flowing hair nugget instead. Maybe the coin shooters will let me hunt with them. Weigh in on the cheapo scale. Wasn’t wearing gloves because I’m no Nancy boy. But maybe I should have been. I think there was a parable about the guy above and his friend. It’s ok I needed the exercise anyways. But next time I’ll bring my big saw just in case. Hand stacked rocks are sometimes a good sign. The poison oak was in bloom, the air was sub freezing, and the square nails and bullets were practically jumping out of the ground. But hey I got a cool piece of gold, paid for my gas and got some threshold meditation in so it’s a win win for me.
  11. I hear dealers are taking preorders now even though they don’t have a solid release date, have no idea how many units will be shipped to each country, and also have not used it or heard from any testers yet.
  12. High impedance cans require more power than most wireless solutions can give. And to be honest high impedance headphones for what amounts to beeps and zips is overkill. A good set of low impedance ones will give you everything you need. I think a lot of what people like about using a powerful amp with high impedance headphones comes down to volume. Louder is better! I use high impedance headphones for critical audio engineering work. For a simple sine wave beep I would put them in the same category as dowsing rods.
  13. I think that will depend on lumber prices and also when engineering wraps up the project. They're working on it 24/7 from what I could tell... 24 hours a month, 7 months a year. Maybe I will get a pass since I worked for one of them before I retired. I know the info is preliminary but I felt it was my duty to share. I think my NDA is expired now.
  14. 4-1-21, EL PASO, TX. - FOR IMMEDIATE RELEASE- Consolidating the former "Big Three" of metal detecting (Fisher, Garrett, and remnants of White's Electronics) into one cohesive engineering force, the United States manufacturers are aiming to put themselves back on the map with a brand new detecting technology. With Minelab leading technological developments in metal detecting for the past two decades, U.S. companies have struggled to meet the performance benchmarks set by the Australian company. In recent years we have even seen companies that in the past, took the crown of metal detecting, be pushed aside as they were run into the ground by poor leadership or unmanaged engineers who struggled to complete projects. Sources say that this strategic alliance was formed sometime in 2015, when the GPZ 7000 was released and it became clear that Minelab threatened to dominate the world detecting market. Luckily these companies had such great foresight to meet that challenge. "We're really excited to share this technology with the world," said engineering manager Gerhard Fischar. "This new platform has the potential to revolutionize metal detecting for customers across the planet." The new patents show that this unique process involves feeding two oscillators through a low pass filter. This signal is then transmitted into the ground through a coil, which is able to pick up shifts in one oscillator, creating an audible tone for the treasure hunter. Recent FCC filings have revealed some detailed photos, drawings, and specs which follow below. Main circuit board photo, showing sophisticated layout of major components and groundbreaking design: Mechanical design, featuring organically-sourced components and easy-to-operate controls: Detail photo of metal detector coil (NOTE: this is a production model, not a prototype): To release this new detecting technology to the world, the Garrett arm of the company plans to use its marketing muscle and get the machine into the hands of respected YouTube personalities across the world. Steve Moore, director of marketing, said "We've already taken this turn-on-and-go detector out to some civil war sites, and I tell you what, this machine can hunt. Now I won't say who it was, but one of our more popular testers found a shot shell on their first hunt, and seeing that video footage in 4k with all of SUBSCRIBE NOW notifications will make you a believer. And I am pretty sure it wasn't even planted this time." Our office reached out to Minelab about this new competition, a receptionist advised that the engineering and marketing teams were out "crushing tinnies" and unavailable for comment at the moment. An unnamed source provided information on specs of this new detector, which follow below. Name: "RELICMASTER BF-Pro PLUS MAX F97" Price: $849.99 MSRP, $459.83 MAP, $34.21 eBay Weight: 6.7 lbs Technology: Differential Dual-Osc-Sense™ Frequency: 80kHz Batteries: D Cell (12) Runtime: 23 minutes Coil Type: Concentric, 3/4" Plywood Waterproof: IP23 rated, can withstand tears from crying and lint from extended closet stays Release Date: April 2026 Manufacturing Location: Juarez, MX We'll be following up on this exciting development as it looks like the USA is back on the map when it comes to metal detecting.
  15. The fact is that you sell where you can make the most profit. Africa and other emerging markets like Brazil, Mongolia, and SE Asia have little mining regulations, and lots of undiscovered gold. Think of taking a GPZ to the Sierras in 1840. Yes, that level of gold rush is happening in these areas of the world. I got to see it first hand when I worked for White's. So if it was your company, would you ship dozens of 40 foot conex containers to Africa and Brazil, where the detectors will sell for 2x retail, or send 100 units to the US for retail? It's an easy choice. Maybe even a SMART choice if making money is your goal. The US and AUS prospecting markets are crumbs compared to the rest of the world. It's a hobby, and the easy gold is gone. Compare that to Africa where you can make a living by panning with your bare hands, and nuggets in the kg range are easier to find.
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