An experience I had.
Impact users take note.
Was originally posted on Dankowski forum.
I copied to here.
The mighty Nokta Impact.
How good is this detector when hunting in iron?
It does pretty well.
I have tried to follow the host here Mr Danksowski's comments as he continued to provide here on the forum as he tested and used,
He says a site cannot be hunted one time with one mode and or settings and pull all the targets.
Is he right here?
Some folks reading what he said, may have thought what, all you are doing is changing the number of tones reported, no real differences right?
Now as Mr Dankowski was testing he commented on certain modes as far as depth, frequencies too.
But what about hunting in iron and nails, are the Impact's modes here all basically equal when it comes to reporting nonferrous targets?
Now some may be thinking right away, the answer is no, but just because of the deep mode, knowing it does have a slower recovery.
What about the DI99 mode?
I had read where some enjoy using it. I do too btw.
Will it pull out all nonferrous finds the Impact is capable of? Giving clues via recognizable audio?
The short answer here is no.
I'll explain in a moment.
Before I go any further, how many folks here watch all the videos where nail board tests are done, detectors are even compared in the same videos sometimes. How about the ole " down the barrel nail and coin test". I watch these, I'm sure others do to.
Watching all these test performed and videoed (I do appreciate folks,doing btw), what is missing?
What do we seldom ever see in a video as far as how a detector behaves and even how it behaves with settings adjustments and if applicable mode changes?
The answer is a nonferrous grounded to a piece of ferrous like a nail.
Would seeing such be helpful?
You bet ya!!
I am sure a lot of older members here have read the following, I strongly suggest new members to read. This article is somewhat tied to the rest of this post here.
http://www.dankowskidetectors.com/irondiscrimination.htm
So how do the modes DI99 and DI3 differ on Impact?
DI99 mode allows no tone break settings, they are already done for a user. And the targets reported reports on a sliding scale depending on how the detector responds (sliding scale) with felt conductivity of a target.
DI3 allows for tone breaks as well as tone pitch adjustability.
DI99 seems to ID wise report faster as the coil moves over the ground while looking at iron, nails, and possible nonferrous.
DI3 seems meter wise to report slower.
Watching the DI99 mode with the coil in action over a polluted site, one might think the meter is under shooting and overshooting TiD numbers wise when compared to DI3.
Personally I can't say for sure.
So what advantage does DI3 bring to the table DI99 don't or DI 99 mode struggles moreso at doing?
It seems DI99 could be over reporting (or reporting too good) here in instances where ferrous materials and nonferrous materials are possibly extremely close and "for sure" when a nonferrous is grounded to a ferrous object.
When on an outing this afternoon in this site I have put a lot of heat on with some I think very good detectors.
Under where this old jail once sat.
Btw this where I found the fake capped bust dime with Nokta relic detector last year.
This site is super duper polluted.
http://tnsos.org/tsla/imagesearch/citation.php?ImageID=2052
So I was operating in DI99 for a while here today, then took a break and went to DI3.
Tone breaks were 15,,and 95.
Mid tone freq set to 33.
Btw here, this is a real good way to run DI3 in a polluted site.
And btw Mr Keith Southern talked about this as far as Nokta Reic detector, it works with Impact too.
Will allow a user too focus on mid tones and disregard the high tones provided on iron falses.
So I am sweeping along still with smallest coil and get this mid tone, consistent seemed like a tight signal, meter holding steady at 19.
I was using DI3 99 gain.20khz Disc level 2 with the tone breaks as stated above.
So I had a good steady pretty clean sounding target but it was reporting just a touch above iron range (0-15) according to manual.
So I switched to DI99 mode, used the same disc setting, I swept suspect target nothing period I would have ever dug,,sounded like iron and a rolly Polly meter reading to boot.
Even if I tried to really control coil position and sweep, tone was extremely low sounding what their was of it.
So I started digging, at about 5-6" deep I retrieve this rather large nail looking thing (remember this site loaded with square nails all sizes). After second glance I noticed some threads on the end of this old rusty nail looking thing. Turns out it was a what looks like copper fitting, I can't tell if it is welded by corrosive effects or is mechanically screwed to the piece of iron.
So the use of DI3 allowed me to pull this target out. DI99 wouldn't allow me to.
After seeing what had happened I tried to duplicate at the site, but the site too covered in iron and IMO was skewing my results.
I did check this once back home over sterile site, and was able to duplicate what I saw with the object buried and undisturbed.
Now remember my first tone break was set to 15, had I had it at 20, would I have even heard the target?
I will also comment on this here.
Nail and iron density as far as a site goes.
No detector can paint the true picture here, but Impact with smallest coil does the best here of any detector coil combo I have ever used.
I have spent a lot of hours just recently here in this site with Rutus Alter 71 using 9x8" concentric coil, running 0 disc btw.
Rutus is fast, but it won't give a user as good a picture or ferrous density on a site.
Deus is fast too, but it can't do this here as well either.
Btw running DI3 mode and having it set the way I did, comparing it to DI99 fewer higher tones on iron.
And I think having the mid tone not too far pitch wise above iron range allows a user to spot an " interruption in the music the detector is playing".
I thought I would share my experiences.
I still haven't mastered another service in which to post photos.
When I do I'll post a pic of what I found today.