OK, you are facing the same situation I’ve found myself in, which is why I purchased the Nox 800 despite my doubts. I primarily hunt/chase gold and silver jewelry and silver coins on the beaches and in the water, but in recent months have been confined to land hunting while in pursuit of these items. So, I wanted a land machine for this purpose, previously using a Sov. Gt with digital meter and also my Excal, the Sov being a long time favorite and excellent machine for this pursuit.
Having said all the above and having spent a great deal of time with the Nox in this same pursuit I can tell you this much, for sure. The Nox is a good machine but it’s not a great machine, and here’s why. First, it has very narrow discrimination capabilities, this being obvious by its very compressed VDI scale, just -9 through 40, with 9 of these being the ferrous side, which leaves only 40 for the non-ferrous side, so there isn’t a very broad non-ferrous discrimination range. Keep this in mind.
The audio consist of just standard tones VS true variable tones that also provide additional target information, this further reducing the user’s ability to analyze target returns.
The problem with the Nox as a silver and gold jewelry machine is directly related to its very narrow discrimination capabilities and its factory default settings that you will have no control over, this all going back to that very narrow VDI scale. Gold jewelry has always presented a unique problem due to its inconsistent composition and its inconsistent size and shape, these factors having always allowed this jewelry to appear just about anywhere on the non-ferrous scale. But now, with the Nox, you face this same thing with silver jewelry as well, the size and shape of the item playing more heavily in how these items will get classified on the Nox, conductivity not being the priority factor. So now the various sizes and shapes of these items have a drastic effect on where they will appear on the NOX VDI scale.
The machine does excellent on silver coins, however, due to their consistent size, shape, and conductivity. But, because of the machine’s very narrow discrimination scale these same general readings will also frequently be shared with their clad cousins, size and shape being the priority.
So here’s what I can tell you. Is the Nox 800 a better machine for our pursuit? No, it is no better or worse, what it lacks in some areas it can, at times, make up for it in others. Just don’t buy it expecting too much because for all of it’s tech advances it has also had to make some sacrifices in other areas in order to provide those features. It is a good machine but just don’t expect too much.