Chase Goldman

Then should that have more correctly said, "the first First Quadrature Components Identification (FQCI), the second FQCI,..."

Induction doesn't "flow". Induction is something that happens to a magnetic or electric field. Electric current flows, Magnetic flux, flows. Force can be induced in a wire through time varying electro magnetic fields in another. The degree to which that happens is a function of inductive properties in system, but induction does not "flow".

Maybe some folks in the general Minelab forum would have some idea's then. I really just keep my GPX away from power lines (and other GPX's) or use low noise coils. But other than that, not much you can do. If EMI is untenable then I go to the Nox.

The display screen makes an effective control box shield problematic (though not impossible, I suppose). Partially shielding the coil would be ineffective. I am not really seeing this to personally be worth the trip as I am seldom EMI limited with Equinox. Sounds like it is more problematic for you, though.

Hmm...Vanquish fringe benefits for Nox owners, perhaps...

On the beach it is typically near field cell phone interference and that is being picked up by the control head circuits, not typically the coil. If there are beachside structures, then WiFi transmitters come into play. Otherwise, other than the beach (and this applies to inland water sites), it’s overhead transmission lines, electric fences, WiFi, fluorescent fixtures, and transformer boxes. Broad spectrum interference when talking Multi IQ multifrequency ops. That is why when the “quiet”channel selection by the noise cancel routine is ineffective or forces you to go too low on the sensitivity setting, you can sometimes forgo the advantages of Multi and go single frequency. Typically, the higher frequencies (I.e., 15, 20, or 40 kHz) are less susceptible to EMI but you may also take a depth hit especially at 20 and 40 kHz. And sometimes you will find the lower frequencies are most quiet depending on the interfering noise source. BTW, what you are describing sounds suspiciously like cell phone interference. Turn your phone off, leave it in the car, or at the very least keep it in a pocket opposite of your swing arm so your body can act like an attenuating shield between the phone and control head. Otherwise, avoid folks who obviously are using or possess a cell phone, if you can while detecting your freshwater beach. HTH

Thanks, Steve. My perspective is having used both for relic hunting and admittedly not for prospecting. On the TDI a minie ball and a square nail have similar responses. Not so on the GPX. The high tone (low conductor) cherry pick feature is great for buttons and other brass targets but will reject large lead. So, I can see from a prospecting perspective where this might be advantageous but it seems like a pretty brute force way to iron discriminate (I.e. giving up on high conductors) which is not an “either or” choice I have to make with the GPX though I can still be fooled by bent nails on the GPX even with ferrous blanking. I have a lot less swing time on the TDI than on the GPX, for full disclosure so...yeah probably not the best anti-endorsement. But if, like Garik, you already have a brand new GPX, why switch to TDI at this point unless weight is an issue and you also don’t mind losing some $$ due to depreciation if you sell your “like new” GPX. I would give the GPX a spin first and then decide. But that’s just me. OTOH glad to see Whites trying breath some life into the TDI line, but I agree some technical clarity and less marketing doublespeak on the new coil offerings would be welcome especially since they are targeting primarily experienced prospectors and relic hunters who generally can see through the hype and just want transparency and facts.

Well it IS a lot lighter than the GPX and performs well, but if you are dealing with iron, the GPX has the advantage because of its patented iron rejection features.

Stay strong Garik. You've got everything you need and more with your NIB GPX 5000 and all the coils you already purchased. Remember Rob's advice ...

Yes. I believe that is correct. Predator tools carries on the Lesche digger design legacy.

I do not believe (please correct me if I am wrong) Nokta has confirmed that legacy Nok/Mak coils designed for the Kruzer/Anfibio series like the 7" concentric referenced here will be compatible with the Simplex. A recent Dilek post indicated that Nokta is releasing some dedicated Simplex compatible accessory coils including a few smaller than the stock Simplex coil and one additional larger coil, but beyond that details (e,g. concentric vs. DD and explicit sizing) are lacking as they are still under development. I would expect a smaller concentric would likely be offered, based on Nokta's track record of previous releases. Making the Simplex compatible with the legacy coil line would be ideal. But if that was the case, I would have thought Nokta would have announced that as a selling point and also why then, would Nokta be developing additional Simplex coils as I would have thought the legacy line covered most of the bases?

Gerry - The flyer doesn't make it clear what the bundle offer entails or at least I couldn't find it. Are the bundled accessory items included free with detector purchase or is there an overall discount vs. the total if the all items in a particular bundle were purchased separately? I have heard both versions through the grapevine. Thx.

Don't some deep non-ferrous keeper beach targets sometimes start out indicating in the ferrous bin? I keep reading about such beach recoveries on this forum. If you disc those out, then those will never be heard. Though, if you are encountering a lot of true ferrous targets, it may not be worth the effort for such a low likelihood "false ferrous" find, so you might want to take the risk of missing that target for the sake of covering more beach area. It's all about tradeoffs, I suppose.

What you are describing is basically what phrunt and Steve H. are saying about larger coils being more reactive to ground noise, i.e., a smaller balance sweet spot. As long as the ground phase is not highly variable (typically but not always caused by variations in soil mineralization and which can be mitigated by using tracking GB), then I wouldn't worry about it, as long as you are not getting a lot of ground feedback noise (lots of -7 to -9 TIDs and associated ferrous bin grunts) while swinging the coil in the search modes while in all metal. Furthermore, Multi IQ does a great job compensating for less than optimal ground balance settings vs. single frequency detectors or single frequency mode on the Equinox, so that can be helpful in this case. BTW, for my enlightenment, why do you never use auto pump single point GB? I like that it locks into a single number fairly quickly vs. me trying to hunt for it myself (especially if the last balance point number is significantly different from the new balance point), but agree you would get a better idea of the "sweet spot width" doing it manually. Though, to me that would be more of a curiosity than something I would need to know. I suppose that it also allows you to manually bias the balance point to trade noise for depth in single frequency, for example, which can be advantageous in very unusual situations But is there another advantage to doing a manual vice auto GB? The Equinox manual explicitly states Auto GB is the recommended method (see excerpt below). I'm constantly learning something new about these detectors, so am curious about your preference to do a manual balance. Thanks.

Hadn't noticed that. I could auto GB it just fine. Can you be more specific about the circumstances (e.g. mineralized or mild ground, beach, saltwater or land hunting) and what you observed to make you come to that conclusion (e,.g., persistent ground noise even after a supposedly sat auto or manual GB). Were you using tracking GB?

Still not clear what you need. Jack to jack makes no sense. What size is the plug on the headphones you want to use (big or small) and what size is the jack on the detector you are using (big or small). From what I can make out you need an adapter that can accommodate a small headphone plug and that can plug into a large headphone jack on the detector, correct? Better yet, if you have brand/and or model numbers for the headphones and detector you are using that would be ideal because some manufacturers like Whites and Minelab have special wiring considerations to make things work right. Finally, note that it will likely cost an individual more in postage to send one to you than it would cost to just buy one online with free shipping or at a local Walmart. So if I were you, I would at least spring for shipping for whoever volunteers their spare part. Just a thought.

Also, according to this post you can get the Pro Golds converted to the Minelab compatible (CTX/Equinox) version for about $20. Check out that entire thread. It backs up your observations.

Yes. See this thread and this thread, and more recently this thread.

I want the Impact or at least the Anfibio features in a Simplex light weight package/form factor. I can live without the internal cable routing if it saves on weight. Great writeup on a detector that is kind of getting lost in the shuffle with the subsequent Kruzer/Anfibio/Simplex launches.

Ugh, that is the pits. Maybe Nokta can come through with some sort of direct sale arrangement in exchange for some additional experienced user exposure by you, Simon, on this forum and in NZ ...hint, hint. (Hey, it was worth a shot, lol).

Interesting concept but generally flawed in implementation. All iterations of this concept primarily rely on bluetooth data transmission and as a result are seriously flawed because of the associated processing delays. Audio is about the only thing that can be transmitted and perceived by the operator in near real time and even that can suffer from noticeable delays while swinging the coil on target. The cell phone is great but trying to turn it into an everything machine invariably results in disappointment. I have used my cell phone to run a telescope, remotely control a camera when not using it as a camera, as a gps, as a home smart device controller, audio sound system, video projector, remote PC desktop, etc. These things it can do, but generally, it does not do them all well usually because of everything else running on the limited processing power and memory available. Not to mention the beating your phone would take in the field if it was being used by a serious detectorist and the potential EMI issues. Best to stick with dedicated devices that are integrated and engineered for the task. XP has done an amazing thing with their Deus system and attempts to emulate that with a cell phone other than using the phone as an auxiliary device to run companion apps is going to just be second rate IMO because of the complexity of trying to adapt a universal standard to a very specific and time sensitive process. We'll see how this project turns out, it has been in the works for some time via kick starter, but the engineering challenges are daunting to bring it to fruition and of sufficient performance for what seems like a deceptively straight forward concept. Besides, these kick starter usually flame out unless they have wide appeal or unless these folks get picked up by an existing manufacturer with the required manufacturing infrastructure. Just my opinion.

Your practical nature and superior will power is laudible, if not entirely humorous. You don't sound pathologically obsessive enough for this hobby or at least for this thread. Maybe Ridge Runner can help you see the light.

For people who have impulse control issues, it is really disconcerting that the CAPABLE Simplex+ is priced near the impulse buy threshold. I have detectors that can do everything as well as the Simplex, but I am intrigued by the simplicity and VCO audio option in AM that I wish my Equinox had. This could prove interesting in mineralized dirt and may just be the design that finally compels me to get my first full fledged Nokta detector (if it had a higher single frequency selection option, e.g., 24 - 28 khz, it would be a virtual no-brainer). In fact, I am forced to think up weird rationalizations like if I get the Simplex+ with wireless HP, that would give me an excuse to pick up the wireless Nokta PulseDive pinpointer because I would then have a compatible Nokta detector to use it with. I want Simplex and I need help...

The T2 is not compatible with any concentric coils and has different "front end" electronics and discrimination circuits than the F75 which makes it electrically incompatible with even the F75 DD coils. The F75 was an "offshoot design" from the T2 designed to be compatible with concentrics to accommodate coinshooters vs. the relic and gold hunters that the T2 was primarily designed for. In addition to Steve's excellent article on the T2, here is a good summary article on the difference between the two detectors with quotes from the Dave Johnson who designed both machines: https://www.hollandsbrook.com/blog/fisher-f75-vs-f75-ltd-vs-teknetics-t2-vs-t2-ltd/