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AT MAX all metal mode vdi numbers test
Posted by: calabash digger
Date: December 04, 2017 10:50AM
Heres a look at the at max in all metal mode on some in ground targets. Looking the vdi numbers on different targets..video: https://youtu.be/oWnMzoqmhUM

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Re: AT MAX all metal mode vdi numbers test
Posted by: John-Edmonton
Date: December 04, 2017 02:19PM
I probably would have dug a lot of those signals.Why:

-VDI tends to bounce around and include the high numbers, typically where silver/copper read
- I accept the true all metal mode as being very sensitive, inculuding signals bouncing around due to orientation of target to coil, mineralization in soil, possible contaminated soil with ferrous dust or fragments.
- My philosophy has always been "if in doubt, dig!"
- I would have used a concentric coil, which gives a more accurate VDI
- Because the target is registering as deep, I would have raised the coil, still swinging it, to see at what height the audio cuts out. Once practiced often, you get to guess with great accuracy the size of the target ie tin can vs. coin sized object, therefore, if not a tin can sized object, I dig it
- I accept the fact that all metal detectors, under near perfect laboratoty laboratory conditions, are given a certain designated value (VDI) of a coin sized object, representing it as silver, copper, pull tab, tin foil and so on. Any variation in the field such as mineralization, angle of target, mass of target, size of target, moisture in soil, halo effect, oxidation amount/type on target (there are many others) will effect the VDI numbers along with strength of signal and cut off of signal.

What you failed to do, was to utilize was the iron audio.

-A quick test of the iron audio set to a value of 44 would have shown you that these targets were not in fact iron, again, another reason to dig.
-Decrease your sensitivity and look for a change. A target overloaded on sensitivity, on any metal detector will in fact replicate your results.
-Switch to zero discriminate mode, to see if you get a second opinion.

I have only used the true all metal mode in 2 areas. The woods and deep water. These areas produce the least amount of hits, yet often times the best targets. Has it worked for me with the MAX? You betcha it has. A buffalo nickel, some silver coins, some gold rings, all found in hunted to death areas which others including myself have hunted to death many, many times. Hunting in parks or ploughed fields loaded with copious amounts of iron is purely a lesson in frustration.

I don't need to have the perfect VDI number to dig it. Lots of tricks are out there, whether you use a Garrett, Minelab, Fisher, Tesoro and all the other makes/models I haven't mentioned. You have to learn a lot of those tricks on different detectors, as they are not in the manual, but are picked up in the field with lots and lots of experience.

You have obviously mastered the Deuce Calabash......you know it inside out. Good luck with your hunting!

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Re: AT MAX all metal mode vdi numbers test
Posted by: calabash digger
Date: December 04, 2017 02:46PM
I didn't forget just havent posted the all metal with disc video yet.

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