Hi IONHUNTERS!!
Only metals buried for some years show the phenomenon. So, this machine or like this is for detect buried metals, because these creates around him an electric field or like a battery as suggest FrancoItaly. Repeat: if this ion detector combines good sensibility, stability and accuracy, then sure will be sensitive to this kinds of electric fields, because this electric fields produces an imbalance in the antenna and can show via the adequate signalizer. A treasure produces high energy, in some cases can break the first IC, no science-fiction. This machine is for use in inland, lands free of excessive interference and far to powerlines. Accuracy in this kind of machine mean stability in the more sensitive point.
Here is not important if the soil is more negative or positive than the air or viceversa. Or if the input of the IC is for positive or negative signal. In stability condition of ambient no signal is present, but in the vecinity of this metal there are a voltage and this rapid changes "knock". So, this "knock" is the important, because up or down the voltage in the electronics, but while "search" for stabilize in the zero, if down tends to up, and if up tends to down and occurs the bips. Agree with FrancoItaly: this instrument is for motion operation. The blocking cap in the antenna is important. 100 pF is a good value. Ceramic high voltage is good, 500 or 1,000 V.
Walk with the machine and move left-right, right-left not very slowly. This mean during detection as you move work as AC and the signal pass through the antenna cap!
The machine form a 90ยบ angle with the body, not very near the body, with the arm semiextended. For to be sure you have detected a X point where the machine sounds, walk in another direction. The bips in the place is the "site".
Another considerations:
* Sometimes (this occurs with some designs) the difference in the terrain produces erratics. All you know that each 1 meter the voltage in the air is 100 or 200 V more the referencial site... Difficult "business" fight to this kind of disturbs.
* At low atmospheric pressure, all long distance detector is better.
I have metal buried in my yard since 1987: 51 bronze quality coins at 75 cm, recipient of silver (200 g) -90 cm-, copper coins (4), cover of gold old watch, small "treasure" of various silver objects, gold rings, include a bronze plate of record player, a 120 cm X 60 cm gross copper plate, curious found with long distance electronic detector at 50 m.
What are you doing? Start with your artificial fields!
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