Digalicious

I wasn't being literal JCR 🙂 I was thinking more like swinging the coil while humming the tune to Sesame Street. Then a 58 comes along. Oscar came out and said, "It's probably not a large silver coin, but rather...

Sweet! 58 eh? Were you thinking can slaw close to the coil, iron wrap around? Then OMG!

Nokta has a PI in the works. Given the precedence of the Simplex and Legend, I suspect it will be an excellent performer, submersible, and low cost.

How do you propose Nokta could have avoided getting a bad batch of speakers? Especially considering that those speakers initially worked fine.

Would the channel held stones be adhered with a glue of some type? If so, maybe a heat gun could melt the glue.

That sucks Cal. I heard that it was a bad batch, and apparently, they outright changed their speaker supplier.

That, and to the best of memory, the only significant software issue, was with falsing in some salt conditions. That was fixed up really fast. The other updates were mainly user requests. The only hardware issue is the speaker, but Nokta got right on that by getting a new speaker supplier.

GB, It's my understanding that due to the magnetic properties, nonferrous objects produce a signal 2.5x stronger than a similar sized nonferrous object. Given that, along with the much larger surface area of the nonferrous nails, and the nearness of the coin to the nails, then I doubt any detector is actually separating the coin from the nails in just about any nail / coin test. Rather, the nails and coin are being detected as one, and it's therefore the iron bias setting that determines if the nonferrous coin tone is heard. That's also why in nail tests, the coin always has a much lower ID than it would if it was alone. That proves that no separation is occurring. If the coin was truly being separated, the detector would show the coin's true ID, and not a dragged down ID. In other words, it seems to me that most nail tests are actually unmasking tests, and not true separation tests.

This all great information. Thank you. Now how do you get the gems out that are glued in? Heat gun? Then, how do you sell the gems?

Hi Rick. I'm thinking that Calabash test you posted would be much more of an iron bias test than a separation test. I use two nonferrous targets for separation tests.

As long as the detector is quite and stable, then there is no good reason that I know of to lower the sensitivity.

Let's just say that you approached that with a lot more tact than I would have 😁

Technically, it's sequential, but so fast that it's not a stretch to call it simultaneous. Although the detector is combining the signal of each transmitted frequency, so I guess it's true simultaneous when it comes to the processing. Locator, I skimmed through your link, and it looks very interesting. Thanks 🙂

So if the BCR is an extension of the upper range on the iron bias, then it shouldn't have any effect on nonferrous objects that don't also have a ferrous object in the same field. If a nonferrous object is all by its lonesome, then the only way I could see BCR filtering it out, is if the nonferrous signal is so weak, that it would have been identified as ferrous, or just above ferrous, regardless of where the BCR is set.

Fortunately, I wasn't one of the many that were concluding "50% more power to the coil", meant 50% more depth. I often answered them with, "50% more depth than the Nox? Absolutely not, and not even close. 50% more depth than a Micronta? Yes, and more so!" 😁 Anyway, thank you all for the replies and links that provide more in depth information.

Cal, I saw that article as well. It explains a method to help identify caps, but doesn't explain how the BCR works 😕

In the Legend forum, it was asked, "How exactly does the BCR work"? I replied that I wanted to know as well, and that my guess was that the BCR is an upper end extension of the iron bias range. Your comment leads me to believe that BCR may be exactly that. I also noticed that the D2's BCR setting and Silencer are the only settings on one of the settings screens. I don't know if that's just a coincidence, or if it's more evidence that BCR is an upper end extension of the iron bias.

I do recall the Minelab rep? engineer?, saying, "50% more power to the coil". When I heard that, my first thought was, "how can you practically produce such a massive increase in TX, yet no other manufacturer does that"? Then I thought, "50% more power compared to what"? I'm just not getting why detector manufacturers are often so vague when it comes to their features. Another example of this is how they don't state what SMF frequencies are being transmitted, and how they are weighted. The common argument defending such is, "They don't want the competition to know". Except, it seems to me that with an oscilloscope or some other device, the competitor's engineers can easily figure that out. So why such secrecy and vagueness?

Yep, there always seems to be a trade off when it comes to metal detectors. I was hoping there was a less complex answer to my first question, but it looks like the long answer is going to make my brain bleed 😁

Thanks for your thoroughness Steve. I read your post that you linked. The one titled "Selectable frequency and multi frequency". Umm ya, a rabbit hole indeed! I enjoy knowing as much as I can about how detectors work, but I don't want to get that deep into 🙂 So without wanting to get into that any further, I just have 1 last basic question: If transmit power is so high that it causes that "blowback", can that blowback be reduced by decreasing the receivers gain, instead of reducing transmit power?

I'd like to know as well. My guess is that since ferrous objects (like steel bottle caps) also produce a nonferrous response, then perhaps BC is an upper end extension of the IF? If that is true, then I wouldn't use BC when trying to unmask good targets from nails.

Hello. I don't plan on purchasing a Manticore, but I still like to learn about the new detectors. With that said, I have two questions about the Manti: 1) Isn't Tr power regulated, and haven't detectors reached the maximum allowed power output a long time ago? If so, what does the Manti's "More power" even mean? Could it be that it doesn't transmit any more than the regulated power at any given time, but rather, each sequential frequency pulse is transmitted at full power? For example, in a SMF mode, both or more frequencies are all transmitted at full power, instead of 1 or more of those frequencies transmitted at low power? 2) If you own a Manti, what sensitivity level can you usually run at without noise, and how often are you able to get even close to 35?

Sounds good. Please post back with how things went. You said that you're fairly new to the Legend and detecting in general. If you need advice for hunting in the typical trashy parks, sports fields, etc, then just ask.

Yes, but it's not beta as in "It could cause my Legend not to work". There are no bugs in the beta version, but Nokta did make some slight tweaks to it based on customer requests.

Hi Sirius. For salt conditions, use either Beach Mode's Multi Wet (MW) or Multi Dry (MD). Do an EMI noise cancel, then ground balance on uncontaminated ground. If steel bottle caps are driving you nuts, then raise the Bottle Cap Reject accordingly. Gold can ID just about anywhere on the ID scale. Very tiny gold, deep gold, and gold chains without a pendant (the very weak gold signals) can even ID in the ferrous range.