MXT VDI Discrimination

[mntnflyr4fun]

As I once again work with an MXT (bought my first one in 2005 recently acquired another) I wonder if there is anyone who has determined the correlation between the discrimination settings and the VDI numbers affected.
I have looked all over various threads and forums and have not found anywhere that you can readily understand what vdi numbers are being disc'd out at any given dual control setting.
Is it important? Has someone already done the work to catalogue this info?
Anyway, if anyone has a comment, I would like to hear it......

 

[JCR TX]

There is not any "hard" correlation chart, or even single Disc point/VDI that I have seen. It would not be universal or accurate enough to use anyway. The marked reference points are meant to be a relative index. You just have to test targets & build a working understanding of the effect. The MXT is a great single frequency machine. I still use mine fairly often with a good coil selection.

 

[mntnflyr4fun]

I suspected......
Thanks for clarifying

 

[Builder1]

Maybe this will help. this is for coins only.
Nickels 18 19 20
Pennys 77 78
Dimes 77 78 79
Quarters 83 84 85 86 87
50 cent and $1 91 92 93 94

 

[Odanscoils]

Still loving my MXT.
Especially in hih RFI.
Where the Manticore and Legend just won't run.
Never really used discrimination.
I love it's ability to clearly tell the difference between Indians and copper pennies. Typically a consistent 1-2 numbers below pennies.
Solid on that every time.
I could cherry pick indians all day.

 

[vito]

As I once again work with an MXT (bought my first one in 2005 recently acquired another) I wonder if there is anyone who has determined the correlation between the discrimination settings and the VDI numbers affected.
I have looked all over various threads and forums and have not found anywhere that you can readily understand what vdi numbers are being disc'd out at any given dual control setting.
Is it important? Has someone already done the work to catalogue this info?
Anyway, if anyone has a comment, I would like to hear it......

As far as I have read, all VDI diagrams, refering to the traditional 6.59 kHz from White's (DFX included in normalization mode) are therefore also valid for the MXT's V.D.I.#
That was one of the best arguments to stay with White's as you hadn't to learn new numbers.
You can use all lists created for the "traditional" Whites devices. There are a lot in the WWW.
Sorry, no help for the disc settings, as this works as a analog dial.
Hope that helps...

 

[Odanscoils]

Like said before.
Just use it and learn it.
One thing I do for every machine.
Especially my Sovereign gt and other minelabs.
I carry an assortment of coins.
Large cent. Coppers and numerous silvers. Rings and earrings.
I lay them out at any new site for possible varying ground conditions.
I scan all them on the new to me ground.
Noting any different VDI's from normal readings I normally get.
Anything unusual I put in my pocket note book for reference at new sites.
What I love about the MXT is it's consistent.
Everytime. The numbers Stay rock solid.
Do I get iron masking. Who doesn't.
There's a little trick for these older slower recovery speed machines.
I carry a 1/4" 12" long screwdriver.
I round and polished the blade part in hopes of not damaging a nice coin.
If you take the screwdriver and push it into the ground a few inches from what you suspect could be a good target.
Give a firm wiggle left right and forward and back. 90% of the time you'll break up that iron crystal ball. Halo Effect.
Clearly showing as iron now. Then slowly sweep around the iron and more often than not.
You find that hidden treasure.
Good Luck and enjoy.