Chase Goldman

Why are you selling the 8” coil?

True - note that even with all metal (no discrimination) selected - iron bias will still affect the target signal regardless, but it will be a stronger iron signal with less falsing if it is on "high". Note also on the Equinox - "0" iron bias does not mean "No" iron bias. "0" is just the minimum setting for whichever iron bias filter you are using (FE or F2) but there is still some bias filtering taking place even at "0" setting and "0" FE does not equal "0" F2.

Incredible finds, Dan. Both in terms of what they are and the condition they are in. Great job by you and your team.

At the Diggin' in Virginia hunts Debbie S. from ML is usually in attendance and they raffle off a ML donated GPX. This last time around in November, they made it a point to mention that this would be the last GPX 4500 raffled off at DIV as the model was discontnued. I guess it will be a 5000 next time and the raffle chance ticket prices will also likely go up.

The following is a discussion of existing PI detector features that I find to be useful for relic hunting that goes beyond the target discrimination break-point discussion that Steve articulated so well above. Beside the high mass-high conductor/low mass-low conductor discrimination breakpoint setting - another useful feature implemented in the ML GPX and to a lesser extent (or less successfully, based on my experience) on the Garrett ATX is iron identification, rejection, or blanking. The GPX implements a blanking function on probable "high" (low tone) corroded iron signals with the peak of the signal tone blanking out. Not 100% effective as it can also provide "false positives" on non-ferrous targets but it is nevertheless a pretty useful feature. Similarly, the ATX has an iron grunt check, which is both ergonomically inferior (requires you to engage a separate button during your swing) and I have found it to be less reliable (almost to the point that it is a 50/50 proposition if you do get an iron grunt). Blanking has it's drawbacks of course. Besides reliability, iron reject/blanking on the ML can only be utilized with DD coils and can become overwhelmed in thick iron situations. Anyway, Alexandre or Rick (once you get your machine), if either of you can shed light on whether such a feature will exist on any or all iterations of the Fisher Impulse, that would be enlightening. Finally, compared to the Garret ATX, I find that the as you gain experience digging innumerable nails, the tone "shape" of the GPX provides a wealth of information. For example, the classic "W" double peak high tone (low conductor/small mass target) is often a clue that you are swinging along the long axis of a nail. Turn 90 degrees and that nail sounds like a sweet high tone indicative of round brass or small lead. Bent nails, however, are very difficult to ID, they sound great. Higher mass minie balls give a nice smooth low tone that will not break unlike a large rusted nail or other piece of iron. The ATX uses more of a processed doorbell high-low/low-high tone, so it cannot convey much additional target information other than the high conductor/high mass or opposite characterization. So I am interested whether the tone implementation on the Fisher Impulse target audio will convey analog-signal-like target characterization (e.g., irregular or regular shape) information. Thanks for reading. Excited to see the Fisher Impulse in action.

The Pulse Dive is a solid product. I bought one but then traded it to a friend for a coil (he will put the Pulse Dive to better use in Florida), while I opted for just the wireless pinpointer version sans the dive coil attachment (about $50 less) as a companion for my Simplex since it pairs with the Simplex wireless headphones.

If you are willing to take the plunge so to speak on the PI King. It would be great to know how durable and effective it is for your needs which appear to set up well for the primary task at hand. Good luck.

BTW Erik, your statement above is the reason Steve went down the path of trying to explain to you what pulse induction technology is and why it doesn't necessarily work well for finding small gold in salt water environs. So be careful as you are tending to contradict yourself in your own thread with statements like... This is fairly common technology that is also used in terrestrial pinpointers. There are several different PI dive detectors using similar technology and vibration modes on the market from Quest (the Scuba-Tector), from Nokta (The Pulse Dive), and of course the Vibratector Steve linked previously. The old addage, you get what you pay for usually applies. Their detection range is rather limited. Good luck.

Get the original vs. the knock off if you want to guarantee sustained reliability in a saltwater environment.

Thanks for the detailed reply, it gives a better perspective on how you have been approaching your testing.

I recommend the upgrade, but perhaps you should wait to see what other folks opinions are on version 2.0. I have a primary and backup 800 since one gets abused beach hunting. I had 1.5 on one and 1.75 on the other. Once 2.0 came out with the F2 filter, I went ahead and upgraded both to 2.0. I felt 1.7.5 caused the 6-inch coil to false a little more on iron. F2 adjustments addressed that concern. The good news is that you can easily move between all three firmware versions so there is no situation where you can't go back to a version you like if the new one does not float your boat. Check out this thread - the OP is not a fan of 2.0 and has tried out all three versions and is deciding between 1.5 and 1.7.5. So you can read through his experience in the field and in his home testing to get his perspective on the various versions.

Some claim to be able to tell the difference, but anything less than 50 ms is generally imperceptible to most people. The problem I have found with the WM08 module is that it is a little finicky about placement. It wants to have a clear line of site to the control head to prevent dropouts. Some folks attach it to their hat to accomplish this or use a very short run of cable between the headphones and the module (the Gray Ghost NDT's are ideal for this because they have removable headphone cords and you can order a short (<1ft) Mini-XLR to mini-plug patch cable and attach the WM08 to the headphones themselves to give them clear line of site to the control head. The ML headphone adapter + regular length Gray Ghost headphone cable means you have to stuff all that cable somewhere even if you plan to wear the WM08 on your waist so it is a doable but a little unwieldy. When it is all said and done, the WM08 makes a great backup solution if your BT headphones take a dump, but the BT headphones perform just fine as far as latency is concerned IMO (you would have noticed it already if it was going to really bother you - really only comes into play when moving the coil for target wiggle off pinpointing or locking in a signal amongst the trash). The only way I would switch over to WM08 is if I felt the GG audio (or the audio from whatever wired phones I was using) was noticeably superior to the included BT phones - and some do feel the BT phone audio falls short. I don't fall into that camp. I also have hooked up a BT transmitter to my GPX so I can use the same BT APTX LL headphones for either my Equinox or my GPX. HTH

I haven't really noticed a change in ID - nevertheless if you are just starting over with the Equinox, that shouldn't be a factor for you. F2 is an added option that I like and since ML retained FE, then you don't even have to revert the firmware to stick with FE. So basically, I see no reason not to upgrade. That being said, are you certain you used the proper key sequence to get you to the F2 option and it was not there? Specifically, once you navigate to the iron bias settings menu you need to press the accept/reject button to toggle between FE/F2. Pardon the question, but it is just a tad tricky to get there so just wanted to be sure. Apologies if you already did this as state and were not able to pull up F2.

Really interested in how you are able to make these firmware comparison determinations in the field by running a single firmware version at a time. Are you switching firmware versions in the field or just going by "memory" or feel from the last time out? What is the control you are using to make determinations like the recovery speed assertion? This is a very difficult thing to do when you have two detectors loaded up side by side with different firmwares, so I am impressed with your ability to do that over a period of days. It is not possible for most but having two detectors out there at a time to do some real firmware side-by-side comparisons in the field would be ideal. Applaud your determination and detailed feedback, nevertheless. So do we have a winner on the firmware wars, then (I know that 2.0 seems to be the loser as far as you are concerned based on your reporting so far)? Oh and it would also be helpful to compare the settings (sensitivity, Deus operating frequency, Equinox mode, recovery speed settings for each detector, etc.) between the Equinox and Deus and also the types of targets (high or low conductors) that were unable to be seen by Deus that were picked up by the Equinox, if possible. I have both the Equinox and the Deus and am constantly vacillating back and forth between these detectors on what I decide to go with on a given outing - if there is thick iron, the Deus usually wins out (I guess that is telling me there is minimal difference in performance overall). Thanks.

I see, so power gets routed from the battery power output up the stem into the control head and then into the coil via the head mounted coil connector as highlighted below.

Thanks, Rick. Would give you a reaction like on your previous post but I hit my daily quota limit Can't wait to see what your early production model looks like vs. the posted prototype pics. One thing of interest is whether that headphone jack is still embedded in the armrest stem tube and a detaiked explanation of the settings/controls.

Arcadia looks like Paradise. Enjoy that 600, Erik. Good move. Head over to the Equinox forum for some great advice on your new detector and enjoy it. Matey has no chance now.

Thanks, Rick, you nailed the explanation I was looking for. I suppose also, that just like any PI, even under this scheme, you will be digging the pull tabs and foil freshness tops as well but avoiding the bobby pins and ferrous/steel tent stakes, bottlecaps, and even the large aluminium tent stakes and perhaps even high mass lead sinkers other PI's will sound off on at the beach. Besides the belt plates, this might be of concern for relic hunters who also recover minie balls and other large lead projectiles.

Rick mentioned Culpeper in another Impulse AQ thread and as a VA relic hunter myself, I am interested in a lighter weight alternative to the GPX I use specifically for relic hunting in hot soil that also incorporates robust iron rejection (somewhat absent from the TDI, so I am not interested in going back to that unit) and some level of foul weather protection that the GPX's lack. The GPX settings revolve primarily around gold prospecting with beach hunting and MILD ground relic detecting presets incorporated somewhat as secondary use afterthoughts. They work well for hot ground relic detecting when set up properly, but when it is all said and done, the GPX is a nugget machine first and foremost, doesn't work as well as a VLF in very high density iron trash conditions, cannot differentiate modern non-ferrouse trash from non-ferrous relics as well as a VLF, and it is also ergonomically challenged in both weight and with it's external battery/audio amplifier pack design with several cables and connectors to deal with that are constantly being strained and subject repeated abuse in the field. I am looking for a compact yet powerful relic centric PI design that incorporates iron rejection and since FT appears to be developing a beach centric (gold rings) as well as gold field centric (gold nugget) variant, I suspect there are feature or tuning setup limitations or perhaps unneeded or suboptimal beach features (e.g., this volcanic sand setting - is it useful in hot soil too?) on the AQ that make it a less than an ideal (but perhaps workable) terrestrial relic machine. I am interested in learning specifically about those limitations so I can decide whether to wait for the terra variant or if this detector line is worth the trip altogether. Prospecting is not of primary concern for me, but there is obviously a lot of overlap between these three PI applications. Put another way, I don't use a PI at all my relic sites because the soil conditions are not as limiting as they are at the sites where I primarily use my GPX or they may be contamnated with thick iron junk. But since the PI is always going to be deeper than my primary VLF machines regardless of soil condition, why not use them when high ferrous or not ferros trash conditions are not an issue? Well the answer is simple, the GPX ergonomic disadvantages generally outweigh the performance advantages over vlf, so I am going to generally reach for that VLF machine when soil conditions are tolerable. I would like that equation reversed. I would like a grab and go, ergonomically convenient PI with decent iron reject that would be my preferred relic machine under most conditions with the VLF reserved for the most challenging trash conditions where separation through recovery speed and discrimination (versus ferrous rejection or blanking which exacerbates ferrous masking) are preferred feature attributes. Looking forward to Rick's reports.

W Which brings me to my sore point on the Vanquish coils. All I am going to say is big opportunity missed by Minelab not including some degree of cross compatibility across their Multi IQ line.

With iron volume on the ORX (not present on the Deus in gold field mode) it is just as noticeable without having to look at the screen, but IAR does have its advantages in milder soils. I suspect that ORX Iron volume is activated by the same algorithm that is used to ID ferrous and apply IAR, so IAR can be somewhat redundant on the ORX but still useful to reduce audio fatigue, I suppose. (Ha, Jeff you beat me to it. Lol).

Thanks. Have fun with Serial # 000001.

Rick - that is exciting stuff. Congrats. So the AQ is adaptable for land hunting but the AU (or whatever it will actually be called) will be the preferred "gold" hunting variant. What are the AQ limitations if used for land relic hunting in highly mineralized soil, like Culpeper, VA?

Just to add onto or clarify what Steve said above. He keyed onto your DST question (bottom line, don't worry about it) but to answer your specific question regarding whether All Metal affects the VDI numbers, the answer is no. They are consistent whether or not you are in all metal. Liked the F75 but have since moved onto the Deus and Equinox for relic, beach, and coin detecting. But I liked the F75 ergonomics and performance so much, I have hung onto it even though it mainly guards the garage for me now. I relic hunt around the mid-Atlantic, primarily Virginia. Have a good outing and let us know how it turned out.

Thank you! EL NINO, it looks like this is looking for low levels from a guitar pickup. I am afraid that the headphone output from a detector is going to overdrive this thing into saturation and then you are going to have the line level output issue you mentioned. But am willing to try it out for fun.