Your CZ-3D 'nickel' concerns....per your request

[NASA-Tom]

...At your service (time permitting). The CZ-3D in an air-test is a failure with nickels (in the enhanced mode).... as far as 'proper' ID is concerned. Per the Fisher Intelligence 4th Edition, do NOT air-test the 3D in the "Enhanced" mode. For your stat's and for amp info..... the 3D should ID approx 40% of a random handful of newer nickels as 'round-tab'. This is normal. Also,,,,,,,,......... do not "FRESHLY" plant new or old nickels.... and expect the 3D to ID properly in the 'enhance' mode. During design, I deliberately ONLY took into consideration , the real-world conditions.... and not air-tests. Once again, the 3D requires a 3-dimensional dirt matrix for proper operation. In the 'salt' mode.... a 3D will do better IN A AIR-TEST. The nickel window was NOT widened for older nickels. The nickel window width remains the same 'very narrow' width,,, but may be more 'centered' around 'V' nickel conductivity..... and,,,,,.... this time... with 'dirt matrix' in mind....ESPECIALLY for nickels that have been in the ground for more then 50 yrs.....undisturbed soil or plowed field. Buffalo's are near the very top end of the nickel window..... and Shield nickels are on the very bottom of the nickel window. Nickels are one of the most difficult coins to ID properly (for any manufacturer)..... and the 3D retains the best (on the market) of nickels-to-trash ratio. Bear in mind there are trillions of targets in the ground........... and a CZ has 7 icons to report. Of the trillions of different types of items in the ground .... the CZ must (conductively) place each item in one of the 7 categories. Guess what that means! ..... It is a inherent name-of-the-game that you will dig some trash items. Part of the hobby. (Though...I'm working on this). Your CZ will ALWAYS (and MUST) read a round-tab as a mid-tone..... and a nickel reading MUST ALWAYS be a high-tone....... or your unit is faulty. Said differently,,,,,,, If your CZ needle/icon points to round-tab,,,,, but gives a high tone.... the unit is defective. Also,,,,, keep in mind that most Indian Head pennies are slightly lower in conductivity then a modern zinc penny. Hence,,,, on a standard CZ.. (or other brand detectors).... many Indian Head pennies will read as square-tab/relic. On the 3D... most all (in real dirt) should now read as high tone. Just like the 6 Half-Eagle $5.00 gold coins found individually & recently by 3D users..... reported to me as finding them as a "high-tone" on their 3D's. This was not a random "let's-dig-the-trash-tones" and try our luck. ..... In summation,,,,, with any brand detector... it is inevitable that you will dig some trash items. My design intent is to 'Max Q' the best ratio of good target-to-bad target. And remember: different detectorists have dramatically differing performance EXPECTATIONS!
... MtdoraMike,,,,, I will gladly validate & demonstrate all of your detectors true design intent for you (in person..... time permitting) if you would like. I live on the East Coast of FL.... near Kennedy Space Center.

Happy Intelligent Hunting!

Thomas J. Dankowski

 

[mtdoramike]

CZ3d demo and was impressed so I bought one. But my only concern with my new 3d is that it wants to ID new or current nickels & buff nickels with a mid-tone. The meter will register as round pulltab, but if I flip over to the salt mode, the meter will read as nickel & it will give a high tone.

I have tried this in the field with buried nickels that were not fresh, but targets that were found while hunting. I even had my wife bring over her CZ5 and tested the target before digging it and sure enough they were nickels.

The reason I felt something was inherently wrong with my unit, was that the coil plug was very hard to screw into the back of the unit + when I read the manual, which shows the chart + your statement that nickels should read as high tone and to always dig high tone targets. But on my 3d, nickels hit as mid-tone and If I only dig high tones, I won't never dig a nickel.

Case in point, I have been out four times with the 3d & my wife was using the CZ5, each trip, her nickel count was 3-5 nickels, my nickel count was 0. We were hunting in the same places. I figured, maybe lady luck wasn't with me on the nickels. But the fourth hunt, I started checking the round pull tab hits, which were mid-tone, I flipped into the salt mode and BINGO, nickel hit in high tone. I dug them and sure enough, I can home with 3 nickels. Don't sound like much, but after being skunked on nickels for the first 3 outings with the 3d, I was getting discouraged.

See attachment.

Thanks Tom, I think you answered my questions regarding the nickel issue.

HH,
MIke

 

[Mark in NC]

help clarify this issue! Being a key designer of this detector, your insight is definitely held in high regard. I was wondering how, with all the different soil types in the U.S. alone, does soil matrix play into the ID capabilites? Is it the leeching of the metal into the soil as in "halo"? Or is it something to do with a comparison of the difference between the soil and the metal itself? I'm just curious....

Thanks,

Mark in NC

 

[WVAdirtdigger]

n/t

 

[Dan-Pa.]

I think most CZ users are being confused as indeed some facets on the advanced mode of the CZ3D have been revamped. So many items indeed mimic a nickel and we have one new tab that hits dead nickel so do expect to dig some junk along with the nickels and perhaps a gold ring.
My wish machine is a CZ with a few added meter facets or a digital model with a 1 to 100 meter.

 

[NASA-Tom]

Mark, ---- Yes, you are correct. It is a phase angle differential between "target vs. dirt matrix" delineated via a "comparator circuit" .... (for those techno guru minded folks). Also... to say that it is not so much of any (overhyped) "halo" effect. The oxides that generate this so called 'halo effect' are not detectable.... but DO help "electrically" connect target-to-dirt better.......for better detection (especially under moist/wet soil conditions),,,, as explained in "Soil Conditions"/"Coil Size Myths" in Fisher Intelligence.

H.I.H.
Thomas J. Dankowski

 

[Mark in NC]

Thanks for taking the time to explain things. I know most folks would say metal detecting"ain't rocket science", but with you involved in design and development... it sorta is! Keep up the good work....

HH'n

Mark in NC