Three frequency probe Nel Tornado for metal detectors Minelab X-Terra

The Tornadounderwent a minor design change at the end of last year, which we didn't actually publish anywhere. It shouldn't be anything more than a minor tweak to the look of the coil. However, since there are a lot of searchers interested in the three frequency coils for the X-Terra series, we decided to take advantage of one new hole we dug to place a simulated copper depot and make a short comparison video.

In the video you will see the essence of the probe test at the lower 3 kHz frequency and the higher 18.75 kHz. The copper depot at 50 cm and the tiny Ag coin in the trigger polygon were tested. The theory clearly states that for a deeper and especially larger object, the 3 kHz frequency should be better, and for a much smaller tiny Ag coin, the higher frequency should work better. In our case 18.75 kHz. You can see how it turned out on the video, anyway the theory proved to be true in this case (not always the case ).

The probe in the 3 kHz setting takes the deputy quite well, in the 18 kHz setting it is such an inaudible hum. On the other hand, the range on a small AG coin was about 4 cm better at 18.75 kHz than at 3 kHz.

The whole test was done in the setting without dicrimination, tone count 3, sensitivity setting at 30 - (depot) and 27 (coin). But mainly working channel 2. For the umpteenth time we have verified that on the deepest targets, working channels 1 and 2 are simply deeper than 0, -1 and -2. I am not able to say whether this is always and everywhere, but we have already encountered a slight range correction on the deepest larger targets. Therefore, I can recommend using channels 1 and 2 with Nelka. Anyway, everyone can test for himself.

What to say about the coil itself? I have basically no complaints about it. In addition, very much appreciates the improved quality of the covers and all the materials used. The probe is thus a 100% professional product from all points of view and Nelu can only be congratulated on it. In addition, thanks to the distinctive shape of the lugs, it can be said that they simply won't burst even if you try to hang on to them .

Elmara, Ranger and Jaccob (Petr Zuklín, LP Service Manager)