Steve Herschbach

I have used both VLF detectors and PI detectors extensively to hunt tailings. Yeah, I dig junk like you would not believe. A GPX 5000 with an 18” mono is a nail finding monster. Click Steve’s Journal below in my signature line and look for Ganes Creek, Moore Creek, and Jack Wade Creek stories. The bottom line is simple. VLF is great until the gold plays out, then you have to go to PI or go somewhere else.

Metal detectors have some basic limitations on how far they can detect items. From http://www.talkingelectronics.com/projects/200TrCcts/MetalDetectors/MetalDetectors-1.html : “the sensitivity is roughly proportional to the cube of the object diameter (as expressed as a function of the search coil diameter). Sensitivity is also inversely proportional to the sixth power of the distance between the coil and the object. All this means is that if the object size is halved the sensitivity is reduced to one-eighth. Also, if the depth is doubled the sensitivity is reduced to one sixty-fourth. It’s easy to see why all metal detectors which are designed to pick up small objects use small coils, (150 to 300 mm diameter) and really only skim the soil surface. If the search coil is doubled in diameter for greater penetration the sensitivity to small objects falls to one-eighth. You rapidly encounter the law of diminishing returns.” Famed metal detector engineer Dave Johnson reiterates this in a different way at http://www.fisherlab.com/hobby/davejohnson/davejohnsonjohngardinerinterview.htm : “Getting extra depth out of a VLF, multifrequency, or PI machine is very difficult, because these machines follow an inverse 6th power law relationship between signal voltage and depth. If everything else is maintained equal, doubling the depth requires 64 times as much signal. If this is done by increasing transmitter power, doubling depth requires 4,096 times as much battery drain. That’s the basic reason why depth increases come so slowly in this industry.”

For all the mega gold these people supposedly find you would think they could afford better digging tools and detectors! It's always the same $59 detector and a bloke chipping away at soft material like a woodpecker. The ones where he uses a little screwdriver and small hammer to tediously chip away is pretty painful to watch. But hey, they are getting millions of views so striking their own kind of gold!

People in general have a lot more faith than I do in the ability to get the technology much past where we are now from an outright power and sensitivity standpoint. I don’t expect any new detector to change the fact that we are pretty much down to grubbing for leftovers now when it comes to nugget detecting. Hate to be a bummer, but that’s just this prospectors opinion.

There is more evidence all the time regarding a little known field in geology called impact tectonics. We assume all the structures we see in the field are related to plate tectonics, but at least some wrinkling, compression, and fracturing of the earths crust has been created by massive meteorite or asteroid impacts. http://www.impacttectonics.org https://ui.adsabs.harvard.edu/abs/2003M%26PS...38.1093L/abstract

Welcome to the forum, amazing history where you are. And your English is 1000% better than my Serb!

Welcome to the forum, nice intro!

Squaring off a DD coil or making a concentric coil pointy on one end however is just more about looks than anything else. I can hear the guys in marketing now... can’t we make it a different shape? Engineer groans....

Very interesting....... https://www.usatoday.com/story/news/nation/2020/01/21/snowball-earth-oldest-asteroid-impact-site-discovered-australia/4531149002/ “Some 2.2 billion years ago, an asteroid slammed into the Earth, leaving behind a massive, 43-mile-wide crater in what's now Western Australia, scientists announced Tuesday. It's the world's oldest known impact site, the new study said, one that also may have changed Earth's climate: It occurred at a time that coincided with Earth’s recovery from an ice age known as "Snowball Earth," where most of Earth’s surface was covered with ice sheets up to 3 miles thick, according to a statement from Imperial College in London. The impact left behind a scar on the land that's known as the Yarrabubba impact crater. "The age we've got for the Yarrabubba impact structure makes it the oldest impact structure on the planet," study co-author Chris Kirkland, a geologist at Australia's Curtin University, told the Australian Broadcasting Corp.“

Most of the gold I have detected has come from tailing piles, several pounds worth. The net take away from it all is that you can find gold in any of it and can’t discount anything. The spot no one else will hunt is where the last remaining nugget waits. That said, the decision to hunt large cobbles or not largely depends on the historical production of the creek. The average trommel has holes around 2 - 2.5 inch in size. If the creek produced lots of large gold that would not fit through that screen you’d be crazy not to hunt the cobbles. If on the other hand the creek produced nothing but smaller gold, then the cobbles are a poor bet. Research is the key. In general because small gold is more common than large gold your odds at finding any gold at all is better in the smaller material. But aren’t we all in this to make the big score? If you want to find big gold you have to go where the big gold is, and most spectacular finds, though rare, come out of the cobbles. But I have to reiterate, if the creek has no history of large gold the odds are very low in the cobbles. Three days detecting in tailing piles

It appears to me that the latest versions of these headphones no longer work with the posted firmware upgrade.

Looks like it will finally be available for purchase by next month along with a new 8” x 14” DD coil. The will make four coils total for both the 24K and new White’s GMX. The coils are interchangeable between the two models.

White's GMX Sport Control Quick Guide

Click for larger versions.... White's Goldmaster GMX Sport metal detector Introducing GOLDMASTER GMX SPORT Waterproof to 10 feet Finds sub-grain nuggets XGB ground balance Frequency Shift VCO & tone ID audio Multiple coil options 40 hour battery life (8 AA) Large, backlit LCD Iron discrimination Pinpoint mode Made in USA Introductory Offer FREE 4" x 6" DD Shooter Coil - offer ends May 31, 2020 White's GMX Sport Data & Specifications

Weight on the GMX Sport weighs 4.0 lbs with the 6" concentric coil. Goldmaster 24K is 3.5 lbs. Gold Kruzer is 3.0 lbs. The 4" x 6" DD coil for the GMX and 24K are coming out along with the new model as well as an 8" x 14" DD. All 24K and GMX coils are interchangeable. Goldmaster GMX Sport Data & Specifications Goldmaster 24K Data & Specifications White's Goldmaster GMX Sport

One coil being better than another really does not mean anything out of context. What makes a coil better depends on the use more than any particular design. If you compare a 10” round coil to a 6” x 10” coil the round coil will get more depth under most circumstances because it has more actual area of coil. The elliptical is simply a smaller coil, and so when comparing an elliptical to a round coil you are better off thinking in terms of the narrow dimension, which puts this difference in your mind. I’ve not the time to calculate it, but an 8” x 14” elliptical probably comes closer to the 10” round for area and therefore depth. The 14" elliptical will cover more ground in side to side sweeps than the 10" round and if it does indeed get the same depth may be a better way to go. Back to 10” round versus 6” x 10” elliptical. In theory the round coil is larger and therefore goes deeper in moderate soil on a coin size target. However, in more mineralized ground on a smaller target a smaller coil may actually get more depth, so it’s not an across the board sort of thing. The depth advantage in that situation may go to the 6" x 10" elliptical. Finally a 6” x 10” elliptical can fit between two rocks or bushes that are 8” apart and the 10” round coil cannot. You can’t find targets if you can’t get the coil over them. Yet in side to side sweeps you give up but little ground coverage with the elliptical. So are round coils better than elliptical? An engineer might make a case from a theoretical design standpoint but in real life it just depends on the situation. Coil Basics by Carl Moreland About Search Coils by Dave Johnson Search Coil Field Shape by Dave Johnson Metal Detector Search Coil Basics Video

You could use the WM-08 wireless module and your Killer Bee's... that's pretty much why it comes with the 800. It is also a lower latency solution than Aptx. Headphones Waterproof / Resistant Aptx-ll ? 66 Audio-bts Pro Bluetooth Headphones Aptx Ll Ausdom Ah3 Wireless Headphones Bluetooth 5.0 Transmitters After Market Bluetooth Headphones Thread Wireless Bluetooth Earbuds Compatibility

Excellent. I just looked at my Goldmaster 24K and see White's had the foresight to use MX Sport style waterproof connectors on the 24K coils so they are good to go on the GMX Sport. Nice to hear the 8" x 14" DD will also be available soon along with the 4" x 6" DD. I kind of thought maybe White's forgot about that one. Not the actual coils, just similar models for illustration purposes....

Still looks like the same clip to me. Whatever, glad you found some at a price that works for you. The GMX Sport name is just a play off the MX Sport name. Whites may sell as many to fresh water jewelry hunters as nugget hunters. You are more a rarity in that regard Simon... I’ll stick with the lighter 24K myself as will most desert types. There are some that hunt nuggets around water however or in places where rain is a constant and the GMX will appeal to them. For what it’s worth I sold the Gold Monster and kept the 24K and the GMX basically being a waterproof 24K is a good thing as far as I am concerned. I do think selling it with two small coils is an odd decision, but as long as a larger coil option exists I guess that’s fine.

No dealers listing yet on websites.... I guess people who are interested just need to call you Jim! White's GMX Sport Data & Specifications

This guy has been selling them for years for about $2 a clip.... https://www.ebay.com/itm/Metal-Detector-Coil-Cable-Clips-for-Minelab-and-Whites-One-Set-of-3-Clips-/123837125144 But Whites has them for 50 cents a clip.... https://www.whiteselectronics.com/product/pair-of-velcro-cable-retainers/ Lots of people selling them for more than White’s and they all look identical, so I tend to think people get them from White’s and just resell at higher prices. Seems like I first saw them on my MX Sport. Don’t know for sure about all that though. I have used them and how well they work tends to depend on the rod diameter. If the rod is too small they tend to rotate, and if too large they pop off when the cable gets tugged. Overall I like them but there is room for improvement, like different sizes perhaps or a version made out of “softer, grippier” material.

Hard to believe two years have already blown by since JP started this thread.

The pics and dimension/kHz info is straight out of version 3 and version 5 of the owners manual. That's not to say it's entirely accurate, but I am just matching what XP has published themselves. Thanks for the extra software info. I considered getting into that but was keeping it simple. Maybe in the next "deluxe" version.

Translation problems. I see what Terry means. In the video it appears you are lifting your leg up as if you have somehow picked the ring up with your toes. You do not appear to bend over at all, so in the video it looks like your are using your leg and your booted foot to somehow pick the ring up and put it in your hand.