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Detector Prospector Magazine

Detector Database



Everything posted by GB_Amateur

  1. Hmmm. Minelab page says (and noting in particular where the finder hails from): Wikipedia says: Makes me wonder if he's in one of those other Arizonas. Also, note the date on the Minelab report -- 1 1/2 years ago?
  2. 42 gold rings in 6 months? Heck, 42 gold rings in six years sounds like an over-the-top success (for many of us)! 188 silvers is almost 5 times what I found, but my rationalization is that mine are in better condition. 😁 Lots of variables in detecting opportunities but hopefully 2022 won't bring anything close to as bad as what you saw in 2021. Besides your upcoming finds, I'll be interested in seeing how long you hold out on getting a Deus II.
  3. Back when they still used coins in LV slot machines I used to play with nickels I had already searched and then keep the payouts separately to search them (for dates+mm). The faces of the coins definitely showed scratches, although I don't think they were as bad as that dime. It looks like it's been dragged across a paved parking lot. As far as a USA quarter getting its reeded edge worn away in a slot machine -- that seems like a longshot (pun intended).
  4. What's the current record for largest nugget ever (recorded) found in AZ? Ever found with a metal detector?
  5. Paying a bit extra for a digital target ID readout detector makes sense for someone who has a chance of staying with the hobby. Many people who buy Christmas and birthday gifts are very much into cost, not value. They might even think "so-and-so isn't going to stay with this anyway so why should I spend one extra dollar..." As far as a better featured detector leading beginning detectorists respect the land, though.... We park, school, beach detectorists have a more/less similar historical experience to compare to -- the aluminum can pulltab. Early on (1965-75) those weren't attached to the can so it was easy to toss them aside. There was already an advertising campaign here in the USA regarding littering. That didn't work (or at least not well enough). So the can industry was forced to try something different -- the 'square tab' (and eventually 'racetrack tab', 'modern tab') still in use today. The other component of that design was a (small) coin-sized flap that was pushed into the can. Surely these changes would solve the problem. And the cans themselves? At least the people who cut the grass will pick them up before mowing. What you propose makes sense, but only for people who have sense -- a sense of responsibility.
  6. Well, I should have dug a bit deeper. On the Garrett webpage for the 24K there are a handful of videos by none other than @Steve Herschbachhimself. I just clicked on one and watched a minute or so and not surprisingly (i.e. representative of the 'actor') the information is of high quality. Gold Prospectors Magazine is a bimonthly hardcopy publication of the GPAA. Garrett has a 40+ year history of posting ads on the back cover of the appropriate magazines. Here are those from the latest two from this magazine: Looks like George Wyant (aka 'King George') in the second one. Maybe that's Steve's finger in the lower RH corner of each?? At least he photoed his index finger. No subliminal messaging....
  7. Exceded the high end of the pre-auction estimated range by 35%. That's a nice chunk of change.
  8. I'm including some illustrations to help understand the construction (not necessarily the operation) of the different types of IB searchcoils. First is general, from Lagal and Garrett p. 27 (1979) and note that DD (labeled a) is a specified there are a type of co-planar as is the concentric (d). Later illustrations below go into some more detail but DD isn't covered: Next three are from Garrett pp. 127, 128, 130 (1985). I've typed in the figure captions since they didn't scan well: Figure 11-4: ILLUSTRATION OF CO-PLANAR SEARCHCOIL WINDINGS (SAME PLANE). This illustration of co-planar searchcoil construction shows that the windings are placed one on top of the other and lie in the same plane. Co-planar searchoils have been in use for several decades. (Note: inner circular coils is labeled 'Receiver' and outer coil is 'Transmitter'.) Figure 11-5: ILLUSTRATION OF CO-AXIAL SEARCHCOIL WINDINGS (SAME AXIS). Co-axial searchcoil windings are placed one above the other with one transmitter winding sancwiched in between two reciever windings. This type winding placement gives the most uniform detection pattern of all VLF and TR detector types and is affected the least by outside electromagnetic field interference. Figure 11-7: ILLUSTRATION OF CONCENTRIC SEARCHCOIL WINDINGS (SAME PLANE AND AXIS). Concetnric searchoil windings lie in the same plane and are centered about the same axis. This newer type searchcoil is operationally equivelent to co-planar serachcoils. Here are some details from the text in chapter 11 which may give some details of advantages/disadvantages of different types: (p. 127): Co-planar searchcoils are one of the preferred types because they produce very sharp, quick target response characteristics. These characteristics result in excellent coin and small object metal detection capabilities. (p 129): ...Co-axial searchcoils give the best performance in areas of high voltage powerlines and electromagnetic interference. (cut a sentence) They are, however, slower response searchcoils. That is, they produce a slower detector audio "turn on" time when targets are detected.
  9. Ah, thanks for repeating that. I just checked a wound up (not like a coil, though) piece of the ~2.0 mm version. (You didn't expect me to just take your word for it, did ya? 😁) I didn't measure the lenght but guessing 2-3 ft. It was right at 14-15. So the signal strength increases but the dTID stays the same. Good to know; I'll try and remember better than I read. 😏
  10. I wonder if they really know the 'value' they have in that detector. I remember (hopefully clearly...) back in the mid-late 70's. White's was advertising their 5 kHz Deepseeker (also called 'Master Hunter') VLF as the gold detector and their 15 kHz Groundhog (in the 80's called 'Gold Hunter') as a coin detector! Now that Steve has pointed out the relationship between target size and optimal frequency, maybe they were effectively pushing the 5 kHz model because it sounded off well on large gold (which was more available then, although not plentiful). Anyway, within about a 5 year period the roles flip-flopped. I think at least part of the reason for the change-of-heart was the success the 15 kHz Groundhog had in Australia. That was mostly Charles Garrett back then, with his pal Roy Lagal as advisor and now they're gone. But who at Garrett (or who among their supported field crews) is a true native gold detectorist? They have plenty of coin and relic hounds -- see the plethora of videos. They had some of the Gold Rush TV show cast (yeh, Todd Hoffman hawking your products -- how wise is that?) using their pans and I remember a YouTube video where Freddy Dodge swung an ATX, but I think he admitted he hadn't done much detecting. I recall the Ace Apex pre-release video by an Aussie but he was finding coins. Maybe he is their authority on native gold detecting? Simon, IMO you can be their expert gold detectorist spokesperson. The least they would do is fly you over some (free) gear, like a hat and finds pouch.
  11. Got my Equinox set up on the bench for some coin dTID testing so I grabbed three pieces of (dug) scrap copper wire, each about 3 inches or so in length but in various orientations (~2.0 mm dia. w/hook half loop on one end, ~2.2 mm dia. straight, ~3.2 mm dia. L-shape). The dTID readings on the Eqx were a bit broad but approximately 14-15, 15-16, and 18-20 respectively in Park 1, recovery speed = 4, gain = 17, 11" coil. Targets were swiped about 2.5-3.5 inch above the center of the coil. (For reference, our USA 5 cent hits 12-13 and our modern zinc cents around 21, if uncorroded/undamaged.) So maybe those numbers are more in line with what you expect? The lengths of copper wire I find can be all over the place, from half inch to a couple feet. Not surprisingly the in-field dTID's vary with length and shape, too.
  12. I assume you are referring to this. (...aptX LL/FS 40 ms...)
  13. Seemingly lost in all this is the fact that this detector was released 3 1/2 years ago (Sept-Oct 2018, right?) by White's, and (AFAIK) it's the same detector now that Garrett is selling it. I realize there has been occasional praise (Steve H. for example) in that time period, but for the most part it seems like a secret. Apparently White's demise (although that was well over a year after its release) and the detector's disappearance from the market for ~2 years explains it some. Throw in the fact that it's a specialty detector. An apples to apples comparison is the ML Gold Monster 1000. Was that so calmly released and received? Still, with all the hubub we're hearing now for the XP Deus II (and don't forget the pre-release frenzy of the ML Equinox), I'm surprised it's taken so long for this to get exposed. I blame you, Simon.
  14. It's not that difficult to answer this kind of question before strarting a false rumor. Their website appears to be up-to-date. I count six detectors in the $299-$849 price range still in their lineup. There are a couple cheaper children's detectors and the considerably more expensive computer imaging models and Ground Penentrating Radar (GPR) hybrids also shown there: https://www.noktadetectors.com/metal-detectors/
  15. I find quite a bit of copper wire -- single stranded (but not coiled) used in constuction. I think the gauge is in the 12-16 range. They typically hit in the USA zinc penny and aluminum screw cap range. IMO, an iron alloy nail oriented with its axis parallel the coil's axis (think vertical when in the ground) can give an interesting positive response. Certainly the nail head contributes, but even nails without heads seem to show similar results. My hypothesis is that what is effectively happening is similar to a stack of small discs which add constructively. Do you have a different hypothesis for that apparent phenomenon (or am I just imagining this genearlization)? Possibly I'm assigning a conductive explanation to a ferromagnetic property....
  16. Nice looking design, and it's real (sterling?) silver. The ones that disappoint me the most are the plateds, whether gold or silver. They can come out of the ground looking like the real thing.... %-age wise I WAG something like 75%-80% of my jewelry finds are junk, and it definitely could be higher. But I dig coin zone tones and the junk metal base is often copper, which explains my results. Glad you got out for one nice afternoon. I don't see many of those in the next 10 days.... But then all eyes will be on your state and its famous varmint.
  17. That's not been my experience with scientific data. There's a plethora of boring data out there.
  18. Excellent post, PimentoUK. I will make one small correction -- our USA 5 cent 'nickels' are 75% Cu. I think that drives home your point even more. As a sidelight, during WWII they changed the comp to 56% Cu, 35% Ag, 9% Mn (= manganese). It's no coincidence that these Warnicks, when not adversely affected by leaching, give the same (or very close) dTID (at least on my ML Equinox) as the standard composition. There was an intense(?) study done to match both the conductivity and density because vending machines that existed at the time were sensitive to one or the other, to prevent slugs from being accepted. Manganese is one of the worst metallic elements for conductivity and when leached from those coins, results in higher dTID's. (This last point is my speculation as there is evidence for such, but not rigorously proven to my knowledge.) Excellent! Similar to data I've posted on gold-copper and gold-silver alloys which I found here and was posted in a couple places, including here. I'm surprised you were able to get so many different alloys to create this plot. Did you mix them yourself? What I've never seen is a similar plot for copper-silver alloys. You wouldn't happen to have that one?
  19. Some of us complain that detector manufacturers don't pay attention to us and that they should hang out here, reading our suggestions to improve their products. Do you think threads like this (including the other one posted within the last couple days ago about the new detector being decals, on the First Texas 'fanboys' subforum, btw) encourage them to come here and listen? Corrolary of the Golden Rule: Put yourself in their shoes.
  20. George Wyant ("King George") and Tim Saylor ("The Ringmaster") are the guys you are remembering. Here's the Wikipedia entry for the show that also tells some things about these two. They definitely had a connection with Garrett and apparently still do. They represent that company at metal detecting shows around the country. (They also used AT/Golds on the show. I think it was cancelled before the AT/Max was released.) Gerry McMullen knows them both and has had good things to say about them (posted here a while back). I think they now live near Gerry (if 'near' means, oh, within a few hundred miles anyway). I vaguely recall an episode where they did some detecting for native gold up that way -- Idaho or Montana. But as you remember a lot of the episodes were done at historic sites (with permission, of course) such as the Hatfield-McCoy 'battlefields' in Appalachia.
  21. That explains a lot. But in the limited (fresh-) water detecting I've done it seemed like the 95% copper pennies took it hard, hanging out in the muck. (Unfortunately I didn't find any 90% silver coins to be able to compare.) Your 3rd dime (another Merc) didn't look nearly as bad as the other two.
  22. Presumably you're referring to Carl Moreland. I only bring up that obvious point because I confused the issue by giving the name of the inventor and company founder as 'Carl Fisher' when his actual first name is/was Gerhard. Gerhard probably knows the answer, too, but I don't think he's a member of this forum anymore.
  23. Thanks for another one of your classic, excellent long, detailed explanatory posts, Steve! But I'm left with one confusing thing. The Fisher Gemini 2-box T/R detector (~90 year old design by the original and founder, Gerhard Fisher himself, but still being sold today with a bit of modernization 😁) uses 82 kHz operating frequency. How does that squeeze its way into all of this?
  24. If you're wanting a reliable 'yes' answer, at least in the IB/VLF arena, I predict you'll be hearing crickets. I hope they surprise us, but I hope a lot (regarding all MD manufacturers). Two brand new multifrequency detectors (from XP and Nokta Makro) are being released early in 2022. And there are many high quality detectors already on the market. Usually the waiting game only results in just that -- waiting.
  25. From the looks of two of those dimes, the water+soil combo is no friend to 90% silver. And obviously worse on the 95% copper as that middle Wheatie is worse than burnt toast. I'll stick with the dry land, although the ease of hunting that means I have more competition. I'm not a gold jewelry detectorist but due to gold's chemical inertness (at least until it's mixed with too much copper), not to mention its high bullion value, I realize that's what you water hunters (salt and apparently fresh) are really after, anyway. Not intending to demean your efforts, Dan. Even that toasted silver retains its bullion value, but I get more excited seeing your numismatic valued finds and except in the worst soils you've apparently got a better chance for those in the dry, as I'm sure you know.
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