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Re: Learning the Impact
Posted by: Mudwhale
Date: August 10, 2017 07:07AM
Quote
General Custer
To Mudwhale.I have been using the Impact for nearly 2 months on Victoria,s Golden Triangle,Australia.I made it very clear I was using it on very high mineralisation.We also have small and large patches of extreme mineralisation where most detectors fail unless they have a COG mode like the Impact.Here ID numbers jump around like nobody,s business due to the mineralisation and I do not find them very useful.The discrimination modes are also unreliable as they can give lots of false signals unless you are in low mineralisation.I use the machine in GEN mode at 20 khz.looking for gold nuggets.I set the discrimination setting from the default 00 to 01 so I can get a low tone for hot rocks and iron and a high tone for non ferrous.I go by tone alone and the excellent tonal quality of the Impact is its trump card.You are using the Impact for what 90 percent of buyers do ,looking for coins and relics. It is however so versatile it can also be used for gold prospecting in Australia.I have posted information on most detecting forums trying to inform people how stable the Impact is in very high mineralisation but it seems to have fallen on deaf ears.

Thanks for the post! Fortunately here in New England we have very low mineralization inland and my Impact runs very smooth. The audio on this machine is fantastic when you learn it's sounds. The DI modes work great here for me. Especially DI99.



Nokta IMPACT,Garret GTAX-550, Garret Pro Pointer, Garret digger, Predator Tools Piranha shovel and 100% DEET!!

And waayyyy across country from you, over here
Posted by: Monte
Date: August 10, 2017 08:10AM
in Oregon, most of it, both Western Oregon and Eastern Oregon, where I live now, the bulk of the ground mineral make-up is more on the higher to extreme side of the spectrum. Very few places can I find that fall in the 'low-to-moderate' range of mineralized composition. Many detectors I have owned or made use of do not fair well at the places I usually hunt just because the ground is so ugly, but my current detector battery handles everything splendidly.


Quote
Mudwhale
Fortunately here in New England we have very low mineralization inland and my Impact runs very smooth. The audio on this machine is fantastic when you learn it's sounds. The DI modes work great here for me. Especially DI99.
Almost everywhere, I can use any of the Di modes on my FORS CoRe, FORS Relic or Impact models set at '95' to '99' Gain and they still operate smoothly. :detecting:

I've only travelled to a couple of parts of new York and New Jersey and my detecting time there was limited, but I sure enjoyed the better behaving ground I was able to hunt in. There are parts of Oregon, Idaho, Nevada, and Utah where I hunt the most that are sometimes a real challenge when it comes to ground mineralization, but the new Impact, like the other TID models I rely on, does exceptionally well, and the visual TID responses are also very acceptable, as is the audio tone response, when the going gets rough.



"Your EYES ... the only 100% accurate form of Discrimination!"

Stinkwater Wells
Trading Post

Metal Detector Evaluations and Product Reviews
'How-To' help for Coin & Jewelry Hunting, Relic Hunting and Useful Techniques.

My Regular-Use Detectors:
Nokta:
Impact, FORS Relic and FORS CoRe (Using mainly the 'OOR', 5", 4X7½, 5X9½ open-frame DD's or 7" Concentric coils as needed. Other coils on-hand.)
Tesoro:
Vaquero, Silver Sabre µMAX and Mojave (With either a 6" or 7" Concentric coil in use, or maybe 8X11 DD on the Vaquero.)

Other Specialty Use Detectors from:
Compass, Makro, Nokta, Tesoro and White's
Note: Detectors are listed alphabetically by Brand, NOT in my order of preference for use. Additional search coils on-hand in accessory bags.

Pinpointers: Using Nokta and Makro Pointers.
Headphones: Using the Killer B 'Hornet'.

*** All working well today to make memories for tomorrow. ***

monte@stinkwaterwells.com .. or .. monte@ahrps.org
(503) 481-8147


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Re: Learning the Impact
Posted by: Cal_Cobra
Date: August 19, 2017 12:26PM
It's more evident in the audio. When you find a pure target, like silver or copper, the audio just sounds pure, as you leave the edge of the object there's no iron audio or buzz, it just drops off.

Quote
cjc
Another thing I like is that where you see a narrow number group it means a less alloyed target--gold, silver copper...
The reporting tells you a lot.
cjc


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Re: Learning the Impact
Posted by: Cal_Cobra
Date: August 19, 2017 12:29PM
Quote
Mudwhale
Quote
General Custer
You can forget about ID numbers when detecting in very high mineralisation.A good target will give say 15 to 85 range unless it is a large object. I only go by the sound of tones and use of the headphones is mandatory.Most of you chaps will only use the Impact in a park so you will not have this problem and thats why you are so concerned with ID numbers.
What mode/s are you using? Here in New England we have virtually zero minenralized soil and the IDs mean everything! The IDs are king when it comes to a dig or no dig here. Today was such a case on 3 occasions. In DI4, Di99 a signal was banging a solid 51 but audio was all over the map. A 51 here is usually a no dig garbage target. I got a colonial flat button. Same thing a few feet further on. If it wasn't for the ID I would have walked away from 2 beautiful targets. Do you even own an Impact? If you do I don't think you are using it correctly.

A 51 could be a US $1 gold coin, a shotgun headstamp, even a button :)

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Re: Learning the Impact
Posted by: Cal_Cobra
Date: August 19, 2017 12:39PM
Quote
General Custer
To Mudwhale.I have been using the Impact for nearly 2 months on Victoria,s Golden Triangle,Australia.I made it very clear I was using it on very high mineralisation.We also have small and large patches of extreme mineralisation where most detectors fail unless they have a COG mode like the Impact.Here ID numbers jump around like nobody,s business due to the mineralisation and I do not find them very useful.The discrimination modes are also unreliable as they can give lots of false signals unless you are in low mineralisation.I use the machine in GEN mode at 20 khz.looking for gold nuggets.I set the discrimination setting from the default 00 to 01 so I can get a low tone for hot rocks and iron and a high tone for non ferrous.I go by tone alone and the excellent tonal quality of the Impact is its trump card.You are using the Impact for what 90 percent of buyers do ,looking for coins and relics. It is however so versatile it can also be used for gold prospecting in Australia.I have posted information on most detecting forums trying to inform people how stable the Impact is in very high mineralisation but it seems to have fallen on deaf ears.

I'd be curious to see your settings for gold prospecting, and some of your finds.

We watched an episode of an Australian gold hunting program with a bunch of groups that gold prospected all over, and 90% of the targets were 6" or less and the gold is decent size, most nuggets were 1gm or larger from what they showed on the program.

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Re: Learning the Impact
Posted by: Mudwhale
Date: August 24, 2017 04:53PM
Quote
Cal_Cobra
Quote
General Custer
To Mudwhale.I have been using the Impact for nearly 2 months on Victoria,s Golden Triangle,Australia.I made it very clear I was using it on very high mineralisation.We also have small and large patches of extreme mineralisation where most detectors fail unless they have a COG mode like the Impact.Here ID numbers jump around like nobody,s business due to the mineralisation and I do not find them very useful.The discrimination modes are also unreliable as they can give lots of false signals unless you are in low mineralisation.I use the machine in GEN mode at 20 khz.looking for gold nuggets.I set the discrimination setting from the default 00 to 01 so I can get a low tone for hot rocks and iron and a high tone for non ferrous.I go by tone alone and the excellent tonal quality of the Impact is its trump card.You are using the Impact for what 90 percent of buyers do ,looking for coins and relics. It is however so versatile it can also be used for gold prospecting in Australia.I have posted information on most detecting forums trying to inform people how stable the Impact is in very high mineralisation but it seems to have fallen on deaf ears.

I'd be curious to see your settings for gold prospecting, and some of your finds.

We watched an episode of an Australian gold hunting program with a bunch of groups that gold prospected all over, and 90% of the targets were 6" or less and the gold is decent size, most nuggets were 1gm or larger from what they showed on the program.

I tested this a bit based on some things I read. I have 2 little nuggets. One is 1/10th gram and the other 1/20th gram. We are talking tiny. From what I read and tried was to de-stabilize the ground balance of a machine. First do a ground balance and test on targets. Next manual gb from there to a ridiculously low number while scanning the gold target/s. They will POP when you hit this magic number. Now it's a gold machine. It works!



Nokta IMPACT,Garret GTAX-550, Garret Pro Pointer, Garret digger, Predator Tools Piranha shovel and 100% DEET!!

avatar
Re: Learning the Impact
Posted by: Mudwhale
Date: August 24, 2017 05:28PM
Quote
General Custer
To Mudwhale.I have been using the Impact for nearly 2 months on Victoria,s Golden Triangle,Australia.I made it very clear I was using it on very high mineralisation.We also have small and large patches of extreme mineralisation where most detectors fail unless they have a COG mode like the Impact.Here ID numbers jump around like nobody,s business due to the mineralisation and I do not find them very useful.The discrimination modes are also unreliable as they can give lots of false signals unless you are in low mineralisation.I use the machine in GEN mode at 20 khz.looking for gold nuggets.I set the discrimination setting from the default 00 to 01 so I can get a low tone for hot rocks and iron and a high tone for non ferrous.I go by tone alone and the excellent tonal quality of the Impact is its trump card.You are using the Impact for what 90 percent of buyers do ,looking for coins and relics. It is however so versatile it can also be used for gold prospecting in Australia.I have posted information on most detecting forums trying to inform people how stable the Impact is in very high mineralisation but it seems to have fallen on deaf ears.

Great post sir!! Try this:

As I posted above, do a ground balance in COG mode. This mode will GB anywhere because the scale has been shifted from normal, 20-90 to 0-90. Once you have a number you can manually shift it up or down depending on your soil. Do this while scanning a small gold object until you here it really POP! You may have to go up or you may have to go down. Down is the first place to try. De Stabilizing the ground will make the machine a lot noisier. This is good for gold because anything low conductor now will be banged. Try it and post back.



Nokta IMPACT,Garret GTAX-550, Garret Pro Pointer, Garret digger, Predator Tools Piranha shovel and 100% DEET!!

Re: Learning the Impact
Posted by: cjc
Date: August 24, 2017 06:43PM
One of the best "ears" machines I've used.
cjc

Re: Learning the Impact
Posted by: cjc
Date: August 24, 2017 06:46PM
I stared experimenting with the Gen mode at 20 kHz too and was very surprised at the size of targets that were coming in--very loud--more so with the boost. This is a very versatile detector
cjc

Re: Learning the Impact
Posted by: cjc
Date: August 24, 2017 06:48PM
Ya, this is a big strength--especially for those of us who hunt a for good and silver. In the Disc modes the reporting is very clean and has a strong bias towards clean, single metals.
cjc

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