best reviews metal detectors for gold
Interesting information about treasure hunters
Types of metal detectors set up for the ground
When searching for finds, the soil will always affect the input of the receiver coil. This is expressed in two “harmful” effects; - weakening of the sounding signal of the metal detector and response from the target, the signal from the ground (noise).

Ground can have properties of electrical conductivity due to the presence of salts dissolved in the ground water. Some soils, especially those with high iron and salt content, affect the input quite powerfully - the signal received by the metal detector from the soil can be 1,000 times stronger than the signal from a metal object buried in the ground on the ground enough depth. The signal from the ground also changes much when lifting and lowering the ring - passing on the embankment or over the pit. Small changes in soil characteristics with stones can lead to brief changes in the input. These changes can generate “targeted-like” signals in the device. They can embarrass the operator because they are defined by sound as metal objects. Examples of heavy soil: Red clay, the transition between dry and wet sea sand, soil with small inlays containing iron compositions or stones (iron, pyrite, magnesite).
Fortunately, the phase shift of the received signal from the soil remains fairly constant within a certain area of the Earth’s surface, and the changes in the signal phase caused by the presence of a metal target are small and short-lived. This requires digital electronic circuits to detect and filter out these short-term changes, against the backdrop of a powerful but constant signal from the ground (noise).

The ground metal detector has a means of compensating and eliminating the “harmful” effects of the earth - a function of setting on the ground (Ground Balance). To remove false signals, you usually need to adjust sensitivity downwards. The option directly related to sensitivity is the depth of detection. When searching, it is always advisable to find finds deep underground. Good deposition from the ground also makes it possible to determine with great accuracy, both the location of the object, and to estimate the depth of its laying.
What can be found with a metal detector
Modern metal detectors, depending on the methods of setting and methods of processing signals, the function of compensating the soil effect can be divided into 3 types;

1. Automatic (pre-installed) adjustment of the ground balance.

2. Automatic. with the ability to manually adjust the balance of the ground.

3. Automatically monitoring the balance of the soil.