Serious Issue With Large Target Identification On The Minelab 900

[Kostas 13]

I would like to express a significant issue I have observed with the Minelab 900 Econox. In any program, and even in single frequencies, when I approach a large target, the machine’s behavior becomes problematic. Instead of correctly identifying the target, it starts to get confused, producing choppy sounds and numerical readings that indicate an iron target, even when it is actually a noble metal.

This is a serious drawback, especially for those searching for large objects, as it can lead to incorrect assessments and prevent the discovery of valuable targets. It is unacceptable for a machine of this category to have such an issue, and I would have expected Minelab to have checked and fixed it in one of the latest updates.

I hope the company’s engineers will pay the necessary attention to this issue and release an update that corrects this malfunction. We expect solutions because, otherwise, the machine cannot be properly used for detecting large, shallow objects.

[JCR]

Do you get a more stable response if you lift the coil?  Large intense signals that approach Overload often cause chaos, no matter the machine.

[Kostas 13]

Yes, the response is more stable when the coil maintains some distance from a large target. However, as the coil gets closer to the target (but not in direct contact), errors start to appear. If this is due to overload, it certainly differs from the overload behavior of other VLF detectors.

[GB_Amateur]

It would help us understand better if you told us the size, depth, orientation, and composition of these overload targets.

[Kostas 13]

The tests were conducted on large, highly conductive targets, ranging from a car to stainless steel pots, always in the air and not buried.

[Ridge Runner]

Maybe what you need is not a coin detector but a two box like what I got the Extreme Hunter from Deus ! ?

 Chuck 

[EL NINO77]

2 hours ago, Kostas 13 said:

Yes, the response is more stable when the coil maintains some distance from a large target. However, as the coil gets closer to the target (but not in direct contact), errors start to appear. If this is due to overload, it certainly differs from the overload behavior of other VLF detectors.

I did a similar test with EQ 800 a while ago ... for this you can use a large, more massive aluminum pan... VDI readings near the coil were very variable..

But I can't tell you how it is with EQ 900..

[Kostas 13]

3 hours ago, Ridge Runner said:

Ίσως αυτό που χρειάζεστε δεν είναι ένας ανιχνευτής νομισμάτων αλλά ένα κουτί δύο σαν αυτό που πήρα το Extreme Hunter από την Deus! ?

 Χαϊδεύω 

I don't expect a VLF to detect deep large targets, after all, its operating principle does not allow it. What bothers me is that it does not work properly in this parameter, like several VLF detectors I have used. For deep scanning I use pulse induction machines as well as geophysical ones, which are suitable for this use.

[Kostas 13]

You can get an idea of how the machine behaves in all programs, both with the 11-inch coil and with the 12x15-inch coil.

Maybe the problem is only with my machine and not a general issue. Tomorrow, I will visit the dealer to have it checked. I would just like those who own the machine to test it as well, because the issue might exist in all units, and the company may not have noticed it, as I don’t think they conduct tests on large targets.