Jump to content

Search the Community

Showing results for tags 'nokta impact'.

More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


  • Metal Detecting & Gold Prospecting Forums
    • Detector Prospector Forum
    • Metal Detecting For Coins & Relics
    • Metal Detecting For Jewelry
    • Metal Detecting For Meteorites
    • Gold Panning, Sluicing, Dredging, Drywashing, Etc
    • Rocks, Minerals, Gems & Geology
    • Metal Detector Advice & Comparisons
    • Metal Detecting & Prospecting Classifieds
    • First Texas - Bounty Hunter, Fisher & Teknetics
    • Garrett Metal Detectors
    • Makro / Nokta Metal Detectors
    • Minelab Metal Detectors
    • Tesoro Metal Detectors
    • White's Metal Detectors
    • XP Metal Detectors


  • Catalogs & Brochures
  • Owners Manuals
  • Minelab CTX 3030 Programs
  • Spreadsheets


  • Calendar




Website URL






Gear Used:

Found 48 results

  1. I went back to Ohio for a week to show off our new little boy and see family. I begged and pleaded until Steph finally gave in and allowed a day of metal detecting. I took back the Nokta Impact and Fisher F22.. I'm not going to go into the F22 yet as I haven't written up an article but I will say the Nokta Impact did absolutely perfect. When I lived in Ohio I was mostly a relic hunter. Overlaying old maps and hunting in fields where old houses and other things once stood. I was really excited to see how the Impact would do. Well, it did better than I could even imagine! These sites are tough to hunt. Although little to no modern trash you have to fight the heavy iron debris to get to the good finds. Where the house or structure stood is where you will just find a ton of nails and iron, I call this ground zero. When I am hunting ground zero I have always used smaller coils with any other detector I've ever hunted with these sites. With the Impact I was able to run my 11 inch coil in even the heaviest of iron with no issues! I've talked about it a lot but worth mentioning again. The Iron volume setting is amazing! I was able to hunt with the iron volume turned way down or off. I preferred it on to know when I was in the thickest of iron but it was nice not to have to listen to it at full volume. As far as finds - I only managed a few buttons, musket balls and my friend managed a nice button and large cent. I found lots of small copper,brass and lead scrap. I have pounded the two sites I was at in the past. This past fall when I went back they were the only two fields around that the crops had been taken out of and this time they were the only two I could find that weren't flooded! I feel like I'm destined to be stuck in these two sites every time I go back!
  2. I recently had the opportunity to review the Nokta Impact. I'm not going to go into details but to say I fell in love with it is probably an understatement! One feature that really stands out to me is the Iron volume setting. When learning the detector I was really surprised I hadn't heard about the Iron volume setting before as its amazing! Iron volume has two functions. 1 - Instead of discriminating out iron you can adjust the volume from 0-5. 5 being the loudest and 0 turning it completely off. When I am relic hunting I run most detectors wide open of very close and listen to all that iron so I don't miss anything but it gets so annoying. With the Impact I can turn iron off, detector is still picking it up but I don't have to listen to it or I can hear it in a very low volume. 2 - it can also be adjusted from n1-n5 on notched targets. The volume can't be completely turned off but the volume can be very low. The advantage to all this is when you start discriminating and notching out targets most detectors will start clipping on targets, slow down a bit and lose depth. With the Nokta you can just ignore or hear those targets at a very low level.
  3. Does anyone here know first hand if there is any difference in the depth capabilities of the Multi Kruzer and the Impact. I am buying a new machine and depth and unmasking are the main things that I am looking for. Waterproof, salt water operation, and weight difference between the two really don't matter to me.
  4. When switching between frequencies is it necessary to GB again or does the previous GB work for all 3 frequencies?
  5. Hello everyone, i'm Mark from Italy. I'm an impact owner since aug.17. I'm using it every days but i'm experiencing a lot of problems with standard DD coil. Suddenly it stops working in some positions and progressively it stops working in any angle (no balancing, no sound at all...). I’ve already changed 4 coils because i’m still under the warranty period but i really want to solve the problem. My dealer has already sent me the new coil and stem but periodically coil fails again. So the question is: it’s only me? Is it a know issue? Thanks for any support! Regards Mark
  6. Hi just bought a new Nokta Impact and wondering if Makro Racer 2 wireless phones will work on it ?
  7. Maybe Dilek will comment here as far as if and or when this newly designed lower rod will be made available for purchase. And its actual designation as far as part number or ID#. http://www.dankowskidetectors.com/discussions/read.php?2,135625
  8. Tom(CA) and I have been working a site that we researched that's produced several 1850's - 1860's seated coins, and some rogue early 1900's coins, as well as a variety of period relics. We tried to get one more trip in before Old Man Winter completely shut us down, and it did in fact shut us down, but not before I finally, got something I've been looking for for a long time, and after watching others find them over the years (I saw Tom dig three!!!), I was starting to think it would never happen. Well it finally happened, and it turned out to be a good one, an 1865 San Francisco minted Liberty Half Eagle!! Here she is out of the hole: Here she is rinsed off: Here's a video of the hunt: Less than 100 known, Mintage: 27,612 Although the mintage of the 1865-S is quite a bit higher than the mintages of the S Mint Half Eagles from 1858 to 1864, it compares in overall rarity to the 1858-S, 1860-S and 1863-S and is only slightly less rare than the others. Almost all known examples of this date are well worn with VF and lower being all one can expect to find. The 1865-S ranks second in the entire $5 series according to average grade and I do not know of a specimen that would grade better than EF. The very few specimens that I have seen were rather softly struck and the mintmark was always quite weak. Thanks for looking, hopefully the next one comes easier
  9. From the Nokta Impact Software Update page... Software Update (03.11.2017) Download : R2_V1.16_V1.14 (System Software V1.16 / LCD Software V1.14) Updates Made : With this software version, the number of WiFi channels on your detector has been increased and an ''off'’ position has been added (shown with ‘’oF’’ on the screen). The “off” position is to turn the wireless connection off completely when the wireless headphones are not in use. This saves on battery power and avoids other wireless headphones accidently connecting to the detector. The new RED EDITION of the 2.4GHz wireless headphones will ONLY work with IMPACT Software version R2_V1.16_V1.14 or later versions. When you are not using the wireless headphones, keeping the WiFi connection of your detector off is recommended. IMPORTANT! If you do not have the RED EDITION of the 2.4GHz wireless headphones but an older version and would like to upgrade your detector with this software version, please check the WiFi channel of your detector first and make sure that it is NOT set to channel 4 or 5 but to one of the channels between 0-3 before uploading the software to your detector!
  10. At one time before its release I had been interested in the Nokta Impact. Speculation ran rampant and I got sucked into the vortex. I already owned a Red Racer and a Gold Racer so I knew that Nokta/Makro made good detectors. As so often happens life intrudes on our metal detecting plans. In the last year I have not detected near as much as in years previous so I had shelved my interest in the Impact. Yet recently I have been able to detect more so I went ahead and acquired one. As usual, I first read the manual(what a geek). While the Impact is a more complex detector than either the Red or Gold Racer, the excellent menu tree and my perusal of the manual had me up and running in short order. At my first opportunity I took the Impact to a location that has had a serious pounding with the Deus, CTX, and who knows how many other detectors. I started detecting with the stock elliptical affixed to the stick. Although the Impact weighs about 4 Lbs. I thought it was nicely balanced so swinging it did not overly fatigue me. This machine has a mode for about any type of detecting you would want to do but on my 1st day I only tried 4 of them. GEN D, DI99, DI4, and VLX2. After a couple hours trying the different modes and learning the tones on the Impact I had found some non-ferrous items that were missed by all other machines but nothing that was a keeper, mainly miscellaneous bits of brass and copper. I thought it was time to switch gears so I threw on the 7" elliptical. I had previously been running mainly factory presets in the various modes but with this coil I wanted to gain back some of the depth I knew I would lose with the smaller coil so I bumped the sensitivity up. I worried about increased EMI but with this coil running hotter, EMI did not cause me any problems. I really like this tiny elliptical. It's the perfect size for working in the iron while still getting more coverage than a 5" or 6" round. I took this little football coil into the heaviest iron at the site and once again while I was able to pluck some non-ferrous targets out of that mess I found nothing to write home about(story of my life, LOL). I did try out the 15" coil. Honestly I am not a big coil guy unless I am swinging a PI and going for max depth. I love working in the iron with VLF's so usually a small coil is welded to the dirt end of whatever machine I am swinging at the time.This 15" is a coil I would use for very specific circumstances only as I would need to wear a harness if I was going to swing it very long. With the 15" mounted up to this machine it was very nose heavy and my arm hurt in no time at all. The wireless headphones seemed to work well. I did not notice any lag that would affect target recovery. A few times I thought I detected the slightest lag in heavy iron, but it was near the end of the day and honestly I was getting tired and probably a little cranky. Likely my imagination. At the end of my first day with the Nokta Impact I was favorably impressed with most aspects of the machine. My main gripes were 1) while well balanced it is still 4 Lbs. I am used to a Deus so when you grab this detector you wonder why it can't be lighter. 2) The tones are very digitized sounding. Some people may love these tones, me not so much. 3) The wireless headphones do not have a long enough adjustment band for me to wear them comfortably with a baseball cap. They rode up on my ears and irritated me. A few days later I decided to do a shoot out between the Impact and some other detectors I have to see how they performed with iron masking. This test was not done to rigorous scientific standards. LOL. Just a test I did for my own information. I can't post all the individual settings and results. I had to come to work on a tugboat and I forgot and left all my notes at home. I will give a quick synopsis of my findings. I hope some one finds it useful but it is just my own opinion. Others are likely to have different results. My friend Chuck(Strick) will post photos of the test for me because he is a good guy and has that down pat. The machines tested were; CTX 3030 with 6"R coil. Red Racer with OOR coil. Deus with 9" LF coil. Deus with Elliptical HF coil. Impact with 4x7" coil. I made sure the dirt was clean of targets befor flipping over a rubber welcome mat and inserting a 1926 SLQ and a 1855 seated dime into holes in the backing. I did this so the square nails I placed near the coins were slightly elevated over the coins. I manual GBed all the machines except the CTX. The dirt under the mat is kinda hot. It lights up most of the bars on the Deus FE meter. The results of the test were surprising to me. First that the CTX did so well in comparison to most of the other detectors. On the first scenario( quarter with one small square nail and one big square nail), all the detectors except the Deus with HF coil could generate a diggable signal on 25% +/- of angles swung on the target. The Deus with HF coil could get a diggable signal 360 degrees around the target. On the second scenario(dime with 3 nails), all the detectors except the Deus with HF coil could not generate a diggable signal from any angle swung. The Deus with HF coil could generate a signal 360 degrees around the target. As I said before I was a little shocked the CTX did so well in the quarter test scenario compared to most of the other detectors because I have seen the Red Racer, and Deus HF and LF coils eat it alive when comparing signals on live relic digs on un-dug targets in heavy iron. I thought the Red Racer would do better as I have also seen situations in which the little OOR coil on the Red Racer seemed almost magical on targets the Deus LF and other detectors have failed on. As far as the Impact is concerned I felt its performance in these two scenarios on that day in that dirt was was nothing to write home about but to be fair it did as well as any detector besides the Deus with HF coil. I was hoping for more as far as separation/unmasking ability from this detector with the 7" coil onboard. But I must say that a detectorist that I respect very much and I believe is a straight shooter tells me the Impact with 7" coil does beat the Deus with HF coil in some scenarios. Anyway, on that day in those two scenarios the Deus with HF coil spanked all the others. I am sure other detectorists will have different opinions or results and that is fine by me. I don't own stock in any of the companies manufacturing these machines. In summation I would say I do like the Impact. It has many fine features and I know I need way more hours on it to leverage all of its capabilities to my advantage. In my world the CTX is my park and lawn machine. The Deus with the HF coil has become my main relic machine for heavy iron. I love the Deus for its light weight, speed, and versatility. But now there is a new kid in town- the Impact. LOL . When I get time I know I will enjoy learning the nuances of this machine. I am looking forward to spending more time in the all-metal modes and some of the other modes I haven't explored yet, like Deep mode.
  11. I just won a Nokta impact and don't know if I should sell it and buy the minelab equinox or not. Any suggestions? Which detector do you think performs better?
  12. Over on PA a new Impact user is asking for help because they can't get it to go deeper than a few inches and the only thing that I could come up with was to use a concentric coil, because I have not used one out in the field/beach, And a dealer was really trying to sell me one today but not without making ***hole comments about my machine and the CTX when I asked him how it compared to mine, anyways here is that link to PA if anyone has word of wisdom to help out, John. https://www.prospectingaustralia.com.au/forum/viewtopic.php?id=23481
  13. Sure impact is allrounder but not depper than at max impact does well on hot grounds as well as garret at max operating frequency give nokta high end but on the other hand it fail in dapth test against garret at max but both achine are good in every point of view the biggest point of both machine is nokta runs on three frequncy 7khz 14khz 20 khz so its all rounder but nokta enginear forgot what garret just make an all terrain waterproof metal detector with 13.6 khz submersible upto 10 feet at last my thaught is sure nokta is used for gold prospective but at max with all terrain can be also allrounder i dnt know y nokta made a great product but did a small mistake that is waterproof i am sure in future they also gonna make impact waterproof then the sell of their product will be higher no other detector can compare with it then
  14. I had somebody ask me to test a couple gold nuggets on my Nokta Impact - preferably a 1 gram nugget and a 2 gram nugget. The person wanted to know the VDI number for each in the DI2 mode and Deep mode. This by accident may be very informative possibly for people who do not know exactly how VDI numbers are generated. The short story is they are a combination of the target conductivity and the size of the target. In other words, silver is more conductive than lead, so two identical items, one made of lead and the other silver, the silver item will have a much higher VDI number. For two items made of silver (or lead, gold, whatever) where one item is larger than the other, the larger item will generally have higher VDI numbers. The Nokta Impact is unique as far as I know in that it has two different target id (VDI) number scales that are used in the various modes. The Impact VDI scale runs from 0 - 99 but as I said there are two different ways the scale is divided. One set of modes uses 0 - 15 as ferrous, all else non-ferrous. The other modes use 0 - 40 as ferrous, all else non-ferrous, expanding the ferrous range. I did not want to sort nuggets all night so came up with a 0.90 gram nugget and a 2.03 gram nugget, both from the same Nevada location, and both of similar shape although one is obviously larger than the other. Here are the results... The 0.90 gram nugget using the DI2 0 - 15 equals ferrous scale has a VDI number of 37. The same nugget in the Deep 0 - 40 equals ferrous scale reads 63. The 2.03 gram nugget using the DI2 0 - 15 equals ferrous scale has a VDI number of 32. The same nugget in the Deep 0 - 40 equals ferrous scale reads 56. Here we have a smaller gold item giving a higher VDI number than a larger gold item. How do we explain these results? Gold nuggets are not pure gold. These nuggets are probably around 85% - 90% gold. The rest is mostly silver. Here is a strange fact. Silver is more conductive than gold. You would think adding silver to gold would raise the VDI number. However, reality is pure metals conduct electricity better than alloys, and so adding silver to gold actually lowers the conductivity and therefore the VDI numbers. In this case the size, shape, and most importantly, alloy composition of the larger nugget is causing it to read lower than the smaller nugget. This is a great example of why if you are looking for gold nuggets you at a minimum dig all non-ferrous targets. And because weak nugget signals (very small nuggets or large nuggets deep) in mineralized ground can read as ferrous, the only truly safe approach is to dig everything. Here is a photo of a large variety of gold nuggets and some coins I tested with the White's DFX, which uses the same -95 to 95 scale as many White's detectors. Again, you can see that size and VDI numbers do not correlate due to shape and purity differences. In general the paler gold has higher silver content. Click on photo for larger version.
  15. Editors Note - this thread was split off from a previously existing topic. I already knew your comments were for your own personal use but if you did not want people to comment on them why post them in the first place? That Aussie guy on youtube also had a sdc 2300 so he was no dunce with Minelabs but it just did not work for him or just had too high expectations.I also respect his right to express his feelings publically as we live in a free society- in Australia anyway. I would quickly have criticised the Impact on any forum if it did not meet my expectations,but there is nothing to criticise except the headphone jack which protrudes too far out from the main housing and can be easily stepped on and the cord is too long.Maybe Minelab could have made the GM 1000 easier to use on goldfields just like my Impact.In my experience there is no smoke without fire.There has not been one post on how the Impact performs on goldfields except mine on any forum and I feel that is a real shame as that is where it excels. I am sure the Impact not only works for me but for plenty of other people too.I found it a little heavy to start with but after a few days with my new arm muscles it seemed light and very well balanced for me anyway and I am getting on, so it would also suit other novices and retirees.There is certainly a lot of resistance towards the Impact in Australia. eg. no Impact tests in the world or Australia in 2 months on goldfields since it came out, but when the GM 1000 came out there were posts about it in goldfields that week.
  16. Details here. http://www.dankowskidetectors.com/discussions/read.php?2,129616 I included release date in title so maybe to help avoid confusion for folks later on
  17. Got delivery of a Nokta Impact detector early June after it was unpacked by Nokta at the shipping point and the latest software version installed and then repacked.Two week delay but worth it.First impression of the unit on the first day of use was one of amazement on how stable it was on our very heavily mineralised ground on our goldfields.I had reservations before that it would be tough going for the Impact but happily these did come to reality.The auto GB was very easy to do and the unit only needed to re balanced every 15 minutes just to make sure.I would recommend this procedure in very heavily mineralised soil. On the second day I was mostly using the GEN mode and on the fourth day I got sick of digging up all the hot rocks and turned up discrimination in GEN mode to its minimum setting of 01.That way I got normal tones when sweeping at normal speed on hot rocks but when checking out the signal and sweeping slowly I got the iron low tone.As a novice user I did not have to change the settings except to increase the frequency to 20 Khz more suited for gold,as the settings are optimized for each mode.Isat setting was left at default of 06 and gain at 70.In the discrimination modes the extreme patches of mineralisation which were 2 feet in diameter gave a target response,but in GEN mode these came up as a broad patch and not a spiked signal so were clearly not genuine targets.It may be possible to eliminate this target response in the disc. modes by altering the settings so I would appreciate getting any feedback from other prospectors on this subject.This VLF detector is clearly marketed by Nokta as a coin and relic hunting detector for use in parks and on beaches but can also be used on goldfields for hunting nuggets.Fitting the larger 16 inch Im40 coil will give more faster coverage of terrain but in heavily mineralised ground it would not necessarily give greater depth although from previous experience adding a 16 inch coil on an old Whites detector turned it into a mean nugget hunter in the days when larger nuggets were still plentiful..Further I would like to point out that higher frequency machines are better for finding sub gram nuggets but in heavily mineralised ground are more unstable.Fitting large coils on these machines may incur penalties such as higher instability in these conditions.I did encounter a huge patch of extreme ground on top of a hill only once in 30 odd hours of detecting but switched the unit to COG mode.Unfortunately I could not continue in COG mode as we spent 2 hours on top of this hill and my wife got cold and wanted to leave.I had found a 1/4 and 1/2 oz. nuggets on top of this small hill previously with an old Whites detector so must investigate this patch further with the COG mode.This hill produced lots of surface nuggets during the goldrush and the west side has been surfaced down to bedrock on the top and to pipeclay on the side of the hill,so basalt lying on top of pipeclay.Further south towards a small town called Dunolly there are numerous shallow gullies which produced lots of large nuggets and also dozens of gold reefs.Even further south just north of a large town called Maryborough there are diggings at Simons where diggers had to penetrate a layer of basalt to get to the numerous nuggets which were lying on top of pipeclay.A large nugget was found near Dunolly 2 months ago by a prospector which was about 4 kilograms in weight.At Maryborough there is a main street full of shops built over the main lead which is estimated to still contain lots of gold.At Wedderburn a town at the northern tip of the Golden Triangle residents ripped up the main street in the 1950,s looking for gold.Such is gold fever.
  18. The Makro and Nokta 9.5" x 5" DD closed elliptical design has been discontinued in favor of a open style design for the Impact, the IM24. The new design is not bouyant like the old design and so will be popular with water hunters in particular. Part numbers for the new coil are available for other Makro and Nokta models There is also a new 5" round coil for the Nokta Impact. RC24 Black 14 kHz - Racer 1 (Red Racer) and Racer 2 FC24 Black 15 kHz - FORS CoRe FR24 Black 19 kHz - FORS Relic FGP24 White 19 kHz - FORS Gold+
  19. What is the very latest Impact firmware as of 6-23-17? Mine should be here sometime next week and before I get started I will download and install the latest firmware but I'd like to be sure which one it actually is as I have seen that there have been many updates of late ( which is a good thing) but I don't want to start to get used to one way and find out that I'm not up to date. Thanks. gene
  20. Hello all...I get emails from customers asking for an update on the optional coils and headphones for the Impact. IM24 Waterproof DD Search Coil 24 x 13 cm (9.5" x 5") and IM40 Waterproof DD Search Coil 40 x 35 cm (15.5'' x 14'') are now in production and have shipped to most of the dealers around the world. Wireless headphones - test samples have been received by the testers and we are waiting for their feedbacks. If no issues are encountered, we will go to production. Will keep you updated. Dilek
  21. I have emailed Dilek the following. It would be nice if Impact was updated giving the user the choice of which frequency to be used to normalize the Vdi of targets. For hunting sites with loads of modern trash, it would be nice to be able to run 20khz, yet have the ID geared to 5khZ. This just one example. Much like the Rutus Alter 71 does.
  22. Hello. I'm still considering acquiring my first metal detector. My main target would be gold nuggets in an area where gold has been mined before for millennia and there are plenty quartzite veins in granite rocks and a good number of small winter creeks. However I would like to also use my detector on nearby beaches and finding coins and relics is also a possibility around here, because of a rich historical background. So I guess I would need a solid all-rounder with could operate on a frequency high enough to make it hot for gold nuggets. It should be priced around the 1000-1250 mark and I cannot justify a second, specialized metal detector. I recently looked at the Nokta Impact and got interested. Do you think it would fit the bill? What configuration would be more effective? Or are there other alternatives that you might recommend - like the minelab X-terra 705 (my previous favorite choice)? Thx Ricardo
  23. I have been laying fairly low with the Nokta Impact so far. Part of that is I have been busy on other things. The main reason however is I quickly zeroed in on how I think the Impact will best serve me as a detectorist. In general I think I can speak for most people when I say we all like lighter weight detectors. However, one area where lighter is not better is when you use large coils. Balance is every bit as important as weight as it determines the amount of torque applied to your wrist as you swing the detector. A large coil on a very light detector creates a very nose heavy detector, one that will put more strain on you when you detect than a heavier but better balanced detector. It just so happens that the Impact with the rear mounted battery power/speaker module is a good design for a large coil from an ergonomics standpoint. This is especially true when in my experience Nokta has designed large coils that are quite light for their size. I was probably one of the first people that really zeroed in on the new IM40 15" x 14" DD coil when it was proposed for the Impact by Nokta. I got on an early wait list for the coil, and just received mine. Nokta Impact IM40 15.5" x 13.75" coil with scuff cover The IM40 DD coil measures 15.5" x 13.75" and comes with a fitted skid plate/scuff cover. The coil weighs 1 lb 13.0 oz or 822 grams as pictured with skid plate and cable and weighed on my postal scales. Yes, I had to say that as some people exclude cable weights from coils! For comparison the stock 11" x 7" IMP29 coil weighs 15.7 oz or 446 grams. I like the flat blunted ends on the IM40, which does help the Impact stay upright as the trailing edge of the coil acts as a flat bearing surface when the detector is at rest on the ground. I am not usually a fan of larger coils and in fact tend to lean to smaller coils for a lot of my urban metal detecting. Large coils "see" more area which can work against them in highly mineralized ground or in areas with lots of closely spaced trash. However, large coils even if they do not get more depth in highly mineralized ground can cover more area faster, and often ground coverage is every bit as important if not more so than depth. In medium to lower mineral ground a large coil can also offer that magic thing all detectorists crave - more depth! The Nokta Impact has another trick up its sleeve that favors large coils; the ability to change operating frequency on the fly. High frequencies offer more sensitivity to small items and quicker separation in dense trash as well as extended battery operating time. The main issue with higher frequencies is they also "light up" highly mineralized ground and hot rocks more so than lower frequencies. This can work against machines that are locked into higher frequencies when attempting to employ large coils in highly mineralized ground. Lower frequencies give up some of the high frequency "hots" on small targets but also are less sensitive to ground issues, including salt mineralization. The ability of the Nokta Impact to run at 20 kHz, 14 kHz, or even 5 kHz makes it very well suited for running very large coils. This is accentuated by the plethora of all metal modes available on the Nokta Impact which can deliver extreme performance when coupled with a large coil. The bottom line is I think the Nokta Impact and IM40 coil may be one of the very best options available for a person wanting to run a large coil on a VLF detector, with depths in all metal modes and milder ground that will challenge many PI detectors. For a lot of what I personally do, like gold prospecting or beach detecting, I will first attempt high frequency, high gain operation and then back off as ground or EMI conditions require. One thing it is important to know when running the Impact with large coils is how the Gain control works. If the Impact is running at Gain levels that are too high, the OVERLOAD message will appear on the screen. Note: You can increase or decrease the overload volume with the on/off button. When the volume of the device is at maximum, the overload volume will be low. As the volume of the device is lowered, the overload volume will increase. The electronic Gain has at least three distinct levels. There are distinct boosts between settings of 39 and 40 plus again between 69 and 70. Setting over 90 are a sort of hyper-Gain region only obtainable in low mineral/low EMI environments. Therefore I may attempt to start out in 20 kHz and a very high Gain. If overloading occurs I will lower the Gain for smooth operation, paying particular attention when I get down to 69. From there on down I need more field time, but at some point it will be better to drop to a lower frequency than to continue to lower the Gain setting. So in theory if at a setting of Gain 39 I still have issues at 20 kHz, it is time to go to 14 khz and run the Gain back up high. If conditions are still not amenable to running at 14 kHz and high Gain settings, I would then drop to 5 kHz and again attempt to run higher Gain levels. Note: people hunting larger, higher conductive items like silver coins and brass relics may very well just start out at 5 kHz. My focus is usually on lower conductive, smaller items i.e. gold. I so far have only done a small amount of detecting in a local park. I first tried Di3 and while it was working well enough the trash density was high and interpreting signals with a large DD coil can be challenging, especially when the coil generates multiple signals on very shallow items. I finally went to the unique GEN(D) mode and it was night and day. The GEN(D) all metal mode combined with the VCO effect makes sizing targets and identifying shallow targets a breeze, even in a trashy park situation. Shallow ferrous is easily identified also using GEN(D). There are several all metal modes a person can employ on the Impact as well as the extended range ground balance available in the COG (COnductive Ground). While the Impact performs ground balance in the range of 20-90 automatically in the other discrimination modes, it ground balances in the range of 0-90 in the COG mode. This enables easier ground balancing on conductive grounds where normally ground balance cannot be performed at all or performed with difficulty, such as salt water beaches. Remember that ground balancing to salt conditions always comes at the cost of reduced sensitivity to small gold items. There is more I could mention about this subject but I really need time to get the hours on the Impact running the large coil to get more into specifics about how to get the best performance out of it. Large coil VLF hunting is not for everyone and is not a magic bullet in any case, but it does offer possibilities for the more adventuresome detectorist. I will close with a picture of my Nokta Impact with new IM40 coil. The detector with this coil is only slightly nose heavy (keep the rod as short as possible) and weighs with batteries 5 lbs 2.0 oz (5.13 lbs) or 2322 grams.