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#1

PhaseTech
Phase Technical
From: Adelaide, SA
Joined: 29 May 2014
Posts: 1,911
Phase Technical
13 February 2019 04:03 pm

Thought I'd start a fresh thread on the Nokta Impact to focus on factual info, tips and good videos from the field.

I still love my Impact, and despite the fact that newer machines have come out since the Impact release, at around $1000 retail now, I still think it's a lot of detector for the money. It's probably my favourite non-waterproof VLF unit. Why? A short summary:

1. Solidly built
2. Great menu layout, and all settings out in front of you, in English
3. Runs on 4 x AA's easily accessible from the back, with long run time.
4. Handle angle perfect and very nicely textured
5. Excellent arm cuff
6. Internal coil cable - great for working scrubby areas
7. Huge coil selection
8. Beep or VCO (modulated) disc modes
9. Excellent all-metal mode with iSat (very stable)
10. Adjustable audio Boost
11. Built in wireless
12. High and low Gain Disc modes, great for mineralised soils
13. Three frequencies and freq shift
14. Built in Vibrate function
15. Adjustable tone breaks and Ferrous Volume
16. Adjustable back light, both time-out or constant options
17. Analogue Volume control
18. Built-in search light

1550034686_nokta-impact-detektor_sml.jpg

Basically, there isn't much it can't do. Sure there are deeper units for wet sand beach use, and more sensitive units for gold hunting, but the Impact can do very well at almost any task.

Last edited by PhaseTech (13 February 2019 04:11 pm)


Agent for Minelab, Nugget Finder, Nokta & Makro, Quest, Detech, SteelPhase - Phase Technical Website

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#2

PhaseTech
Phase Technical
From: Adelaide, SA
Joined: 29 May 2014
Posts: 1,911
Phase Technical
13 February 2019 04:05 pm

Here's a good video showing how well it handles beer bottle caps, using the small 7" concentric coil.
In Dutch but with subtitles:


Agent for Minelab, Nugget Finder, Nokta & Makro, Quest, Detech, SteelPhase - Phase Technical Website

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#3

PhaseTech
Phase Technical
From: Adelaide, SA
Joined: 29 May 2014
Posts: 1,911
Phase Technical
13 February 2019 09:22 pm

On wet sand, the Impact works well, but be careful with sand ingress as with any non-waterproof machine. If you do decide to use the Impact on the sand, make sure you clean out the shafts after use.

The COG (Beach) mode makes it run quite stable for a single frequency unit, and you can often push the sensitivity quite high. But with the GB number on zero, you will have wiped out gold chains - (let me add though that most detectors struggle to find thin chains, including PI machines). One thing I have mentioned in the past is if you want to find chains, and other small jewellery, then after you ground balance, off-set the ground balance number manually by a few numbers. The unit will still remain stable, but you will be able to find chains again (just don't expect huge depth). Now, depending on the beach, you may have to drop your sensitivity a little, so it's a bit of a balancing act. Generally I like to find bigger stuff that is worthwhile digging, so keeping the GB on or just off Zero with higher sensitivity will achieve more depth on most coins and larger rings etc. BUT, if you have found a productive little pocket, then you can off-set the Ground Balance and re-scan it just to see what's there.

This is all demonstrated in the following video:

Last edited by PhaseTech (13 February 2019 09:23 pm)


Agent for Minelab, Nugget Finder, Nokta & Makro, Quest, Detech, SteelPhase - Phase Technical Website

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#4

oldtimerROB
Member
Joined: 01 December 2016
Posts: 287
Member
08 August 2019 05:29 pm

In the GT the Impact has real grunt in the deep mode.eg 20 inches deep compared to 8 inches deep with the all metal mode on a 1.5 inches diameter ball of silver foil.The Impact is so sensitive it picks up too many false signals for me to dig.Someone has to advise on the optimal settings on goldfields to counter this,but then you might miss a nugget but digging up all the signals is unpractical. I use DI2 on the hills as it goes 50% deeper than all metal as deep mode will not ground balance there due to very high mineralisation.I will have to test how deep COG mode goes on the hills but I suspect not very deep.The 15 inch coil,the IM 40 is too heavy for prospecting but I would like to fit a 13 inch coil.Black Dog makes a good one for the Impact but not available here.Nokta should have marketed one on the internet as there is some interest from consumers.


A happy marriage means not having to spend all your days at the pub and so go detecting more often.

#5

PhaseTech
Phase Technical
From: Adelaide, SA
Joined: 29 May 2014
Posts: 1,911
Phase Technical
10 August 2019 11:26 am

Sorry but Deep mode is just not able to get 2.5 times the depth of All-Metal mode, especially in mineralised soils. Deep mode is a higher gain mode, designed for use in low-mineralised soils, and for use with a slower sweep speed. DI2 can go a little deeper than all-metal/GEN but again not 50%. I think you need to spend a bit more time learning the unit. You say you are getting lots of false signals, that is probably due to using Deep. Use VLX modes or Gen in mineralised soils. In Gen mode you have the advantage of adjusting the iSat to maintain a smooth threshold - this is how you maximise sensitivity on the Impact.

If you want to find gold with the Impact, I would be focusing on trashy areas (where it is hard work with a PI unit), and use a small coil, as the Impact separates targets from ferrous extremely well. In this case I would be using Gen Delta mode, or if the trash is really thick, DI3, or if trashy and mineralised VLX2.

Just be aware that the ferrous range of the ID's changes with different modes, in Gen and VLX it is 0-40, and in DI3 it is 0-15. Nuggets coated with iron can ID very low, and even in the iron range, so be careful.


Agent for Minelab, Nugget Finder, Nokta & Makro, Quest, Detech, SteelPhase - Phase Technical Website

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#6

PhaseTech
Phase Technical
From: Adelaide, SA
Joined: 29 May 2014
Posts: 1,911
Phase Technical
13 August 2019 01:07 am

I've got a Nokta Impact playlist on my YouTube channel. Lot's of cool videos.

https://www.youtube.com/playlist?list=P … IkbogKSMjB


Agent for Minelab, Nugget Finder, Nokta & Makro, Quest, Detech, SteelPhase - Phase Technical Website

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#7

oldtimerROB
Member
Joined: 01 December 2016
Posts: 287
Member
23 August 2019 04:50 pm

Thanks for your recommendations on the Impact.I can,t run the tests again as I have been living in Eastern Europe for a while but plan to return to Victoria and live on the diggings next autumn.I have every confidence and stand by my figures.I have had extensive use of the Impact contrary to what you think.We seem to have different Impacts?possibly running different software versions?Another testI did at South Wedderburn was on a gold specimen containing 1-2 grams of gold.Again I seem to remember All Metal got approx. 3 inches depth but DI2 got 5 inches in about 90% on the min. meter.Deep is not a low mineralisation mode as it can balance at up to 80% min. but can be used in most areas on the diggings of the GT except the hills thereafter I prefer to use DI2 or 3.All Metal is good for finding hot rocks as it has disc. which can be set at 01 or 02, and can find very small targets of 0.1 gram at 3 inches in low min.It is very susceptible to mineralisation and going from low to high min. it,s depth will be drastically reduced,possibly to half.I have not used audio enhancement to get extra depth as the manual does not recommend it for general search.DI2 got two sharp signals on a hill at Goldsborough which was still there at 12 inches depth but at 18 inches depth of the dug out hole had disappeared. It must have been something like a mineralised nodule.
All the GT diggings I have been to are relative clean of junk except for tin foil.That's when DI modes come in handy as you can filter out the tin foil to either mask it on a ID setting of 17-19 or have it come up as a ferrous signal.One possible explanation why All Metal gets only low depth is the iSAT is set at 06 whilst DI and DEEP is set at only 01?
I still plan to buy a 13 inch coil for the Impact.A Karma coil is available for purchase online worldwide from the Netherlands for 129 Euros.


A happy marriage means not having to spend all your days at the pub and so go detecting more often.

#8

Ridge Runner
Member
Joined: 04 September 2014
Posts: 5,357
Member
23 August 2019 05:05 pm

I Think PhaseTech is talking about actual In Ground tests Not Air Tests, Not only is he a Nokta Dealer but he must be One of or The Most Skilled Detector Field testers on the Planet Bar none so rest assured that he is reporting the facts.


Dig em all,

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#9

Jarrod84
Member
Joined: 08 October 2017
Posts: 107
Member
23 August 2019 11:01 pm

OTR, can I ask why have you persisted so long with the impact and not bought a dedicated pulse induction gold detector when you main target is gold?

1 user likes this post: Ridge Runner

#10

oldtimerROB
Member
Joined: 01 December 2016
Posts: 287
Member
26 August 2019 04:05 pm

I did ground tests too and unlike others did them in highly mineralised soil.
I have been prospecting on and off over 40 years and have enough experience.
Thirdly I paid only $1280 for the Impact against about $5000 for a new PI unit.It was either that or nothing as it was a big burden on my finances to save that up.Then $800 for camping equipment.If I am happy with the unit I don't see a problem.


A happy marriage means not having to spend all your days at the pub and so go detecting more often.

#11

ronniecruisin
Member
Joined: 28 July 2014
Posts: 239
Member
26 August 2019 04:37 pm

You need to find a TDI pro oz like I Did. Great PI and the only PI than can discriminate. I'm finding it a pleasure to use. All analogue controls too. argh


Oh Well!...It's not the end of the world.....That'll probably happen tomorrow!

#12

Jarrod84
Member
Joined: 08 October 2017
Posts: 107
Member
27 August 2019 01:30 pm

No issue, just that for spending all that money and all your experience chasing gold I'd like to have a gold finding detector.

Sometimes though the challenge of finding gold with a lesser machine can be more fun I guess.
I get a lot of enjoyment finding gold with equinox 600 even though I have a better detector I can use.

I only ask though because I know someone who often asks me for advice and they are also persisting with an impact and haven't found any gold after a few years, hopefully I'll be able to organize a day with him and get a closer look at how the impact performs next to my equinox 600 and gpx when chasing gold.
If that ever happens I'll post about my finds.

Last edited by Jarrod84 (27 August 2019 01:59 pm)

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#13

ronniecruisin
Member
Joined: 28 July 2014
Posts: 239
Member
27 August 2019 03:23 pm

Hi. Jarrod84. I briefly went back to a VLF recently. A machine I had owned once before and regretted selling because of its wireless design and shear pleasure to detect with. New coils have been introduced since then for gold hunting so I figured Id give it another go. What did I find??? Still a pleasure to use as above But! At the end of the day its still a VLF.! Twittery and temperamental in our Oz conditions. I've been detecting for many years and have picked up a lot of gold in that time but the truth is every piece of gold found by me has been with a Pulse machine.! They are generally super quiet in our ground for the most part and they go a lot deeper than any VLF. Now if I were living in the States it would be a different story. I'd be toting a VLF just about everywhere! tongue


Oh Well!...It's not the end of the world.....That'll probably happen tomorrow!

#14

oldtimerROB
Member
Joined: 01 December 2016
Posts: 287
Member
27 August 2019 05:36 pm

Why I like the Impact is that it is very stable in Victoria,s GT,even at Wedderburn.It is not twittery and a delight to use on the goldfields.I feel I just need a 13 inch coil to cover more ground as I am used to a 16 inch coil for prospecting..The stability of this unit is ideal for large coils but you will loose some benefits like better separation..Fitting a different brand on a Nokta may need a factory reset in which case I think I would rather get the IM40 coil from Nokta and use some sort of shoulder sling to balance the heavier unit.


A happy marriage means not having to spend all your days at the pub and so go detecting more often.

#15

ronniecruisin
Member
Joined: 28 July 2014
Posts: 239
Member
27 August 2019 06:21 pm

Hi Rob. My experience with nokta goes back to the fors gold. I do agree with you. Nokta is a very forward thinking company and makes very nice machines. Their approach to detectors is quite different from others. Not surprised you are having fun with yours. Regards.. Ronnie.


Oh Well!...It's not the end of the world.....That'll probably happen tomorrow!

#16

oldtimerROB
Member
Joined: 01 December 2016
Posts: 287
Member
01 September 2019 04:56 pm

Hi Ronnie, Living in Belarus so sorry for the delay.I really miss the Victorian bush and can't wait to get back for next winter season,s detecting.I will be living and camping out in the bush detecting from May to September 2020 and giving the Impact a thorough going over which last time I could not do as my Belorussian wife was in Victoria for 2 years and she could not stand the cold nights camping in the van. I don't see what the problem is with the Impact as I have explained many times to our members it is very stable in out GT soil or gravel except for Deep mode which becomes sluggish on signals up at Wedderburn and cannot be GB,d on hills generally.The Impact has the notch filter feature which can be set to mask the silver foil encountered on goldfields which I don't think you can do with the PI,s.GEN mode is very good at discriminating out hot rocks with a distinct quacking sound.
Only problem generally I can see with the Impact is it has too many modes and features which can become intimidating to the average user and hence it is taking users too long to sort out what to use on gold.I wasted a whole season using GEN until I found out it is only good for small shallow targets.I now use DEEP and DI2 at 20 Khz.I still have not figured what settings to use to cut out false signals which you get in the DI modes.The manual advises what to do to eliminate them adjusting the gain, discrimination and Isat levels,but this is a real specialised field as the wrong settings will cause depth to be lost.No one in the world has yet posted any recommendations for this in very highly mineralised ground.
Nokta is improving its products by giving its customers what they want.The Kruzer is less complicated and has less modes,is waterproof and weighs less.The Anfibio the same and has a 13 inch coil and hits a silver mercury dime at 14 inches deep in the DEEP mode and 14 Khz.Watch calabash digger on Youtube.


A happy marriage means not having to spend all your days at the pub and so go detecting more often.

#17

PhaseTech
Phase Technical
From: Adelaide, SA
Joined: 29 May 2014
Posts: 1,911
Phase Technical
29 September 2019 12:56 am

The Impact has an impressive range of coils available.

8 x Nokta coils to chose from:

1569677654_impact_accessory_coils_sm.jpg

Close up of the massive 17.5"x15" coil!

1569678125_im45_coil_sm.jpg

The full range of NEL and Mars coils are also available for the Impact.


Agent for Minelab, Nugget Finder, Nokta & Makro, Quest, Detech, SteelPhase - Phase Technical Website

#18

PhaseTech
Phase Technical
From: Adelaide, SA
Joined: 29 May 2014
Posts: 1,911
Phase Technical
29 September 2019 01:05 am

I believe there was also a 13" Karma coil available for the Impact but it's no longer listed? It's a cool looking coil, but I don't like the cable coming out directly under the shaft. That would have to be the worst place to put it!

1569679520_karma_coil.jpg

And a new to me company from Spain, also make a couple of coils to suit the Impact:

http://hispaniacoils.com/en/blackdog/#1 … 441de-bab2

http://hispaniacoils.com/en/super-maximo/

1569680163_noktasupermaximoespanol.jpg

Last edited by PhaseTech (29 September 2019 01:16 am)


Agent for Minelab, Nugget Finder, Nokta & Makro, Quest, Detech, SteelPhase - Phase Technical Website

#19

oldtimerROB
Member
Joined: 01 December 2016
Posts: 287
Member
08 October 2019 05:59 pm

The Black Dog range of coils from Spain have been on my wishlist for 2 years but unavailable in Australia.But recently they have opened an online store available worldwide but I have not tried it yet.
The 13 inch maximo is a new rounder design for the Impact and I would chose it over the old more oval shaped 13 inch coil that has been for sale for the last 2 years and now is old stock.The Black Dog Impact got good reviews in the past and I would prefer it over the Karma.
The maximo weighs 460 grams and goes 40 percent deeper than the standard 11 inch Nokta coil,but it covers much more ground,a win win situation if you are detecting virgin ground around the old diggings and looking for larger nuggets 1/4 oz. and over.


A happy marriage means not having to spend all your days at the pub and so go detecting more often.


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