vfp7

In general, I do not see any problems with stability:

Steve, you reminded me of one trick when working with VLF detectors in the surf zone, when the maximum speed of automatic ground balance is set, and the detector begins to adjust to the incoming sea waves. The question is - how is the Nox doing with automatic adjustment of the ground balance? How big is his range of automatic GB adjustment speed, for the ability to work with incoming sea waves?

Concerning the manipulations with the Nail Board test Yes, if the operator knows his detector very well, he can "tweak" the settings and achieve the planned result, both for the better and for the worse. But just as many of the experienced users of the detectors know at the expense of which particular manipulations this is achieved, and therefore they know what exactly should be shown during the test. And people in specialized forums will listen to what the experienced users will say and show, and not the "jugglers" conducting tests with manipulations. For example, on a Nail Board test, the coil should be at a height of not less than 10 cm from the targets, the coin should be small and consist of brass (VDI = 45, out of 90), nails should not be rusty, discrimination should be completely disabled, if the detector has a display, then necessarily show it (VDI) etc.

I would like to know more precisely how this function works. Does it work as a linear filter or are different algorithms used depending on the parameter set?

IMHO Apparently the hardware component of 600 and 800 should be the same ...

Monte’s Nail Board Test can execute and show? https://www.ahrps.org/_tipsAndTechniques/Nail_Board_Test_Scaled_to_Paper.pdf example of the test:

The question arises - will not the salt water corrode the contacts from quick charging? (4 contacts on the photo)

Steve, having studied the shaft of Nox, it became very interesting to me how he had the weighting? The heavy coil at the bottom, the control unit with the battery is at the level of the hand, and in the counterweight on the armrest there is nothing at all. Logically, this combination should cause increased physical stress on the hand. Can you answer this question in detail? ps: judging by the angle of the handle on the shaft, I have a feeling that the Nox is designed to search under your feet. That is, holding the shaft almost vertically ...