The described below GAIN and TONE potentiometers, are only available in BLISSTOOL LTC64X
and absent in BLISSTOOL LTC64. Therefore, BLISSTOOL LTC64X is extended version of
BLISSTOOL LTC64.
9.17. GAIN potentiometer
The GAIN potentiometer serves to define the input AC amplification of the
signal from the detected object.
The proper adjustment of the GAIN potentiometer provides increased depth of
detection.
The recommended level for GAIN potentiometer is about level "6". This level
may vary, depending on the characteristics of the terrain and the external
weather conditions. Choose that level at which the metal detector retains its
stability.
Usually, the best depth of detection is achieved when the GAIN potentiometer
is in level "MAX", but not always this high level is the best choice.
For beginner searchers and initial use and knowledge of the metal detector,
should work at a levels of "MIN" to "3".
At terrains with, from low to medium mineralization, GAIN potentiometer may be increased at
a level greater than level level "6", for example, of level "8" or level "MAX" in order to increase
the depth of detection.
In highly contaminated with iron terrains, in soils containing large amounts of salts, in moist and wet
soils, in clay soils, when searching on the beach and searching in the salt water, in some highly
mineralized terrains and in terrains with a high content of ore, usually GAIN potentiometer must be
set at a level less than level "6" (typically at levels from "MIN" to "3"), since in such terrains are
much larger background and response signals from the field. At high levels of potentiometer GAIN,
they could lead to greater instability, blunting, withdrawal, nasal and/or cutting of the signal from the
detected metal object and/or a failure to ground balance the metal detector to the field.
Signaling for the fact that the GAIN potentiometer is increased to a level greater than the actual
eligible for the relevant conditions, is the presence of great instability, blunting, withdrawal, nasal
and/or cutting of the signal from the detected metal object, and in principle, of the sound of the metal
detector upon approaching of the search coil very close to the terrain. In the perception of any of
these signs, potentiometer GAIN should be reduced to a level where the sound of the metal detector
regains its purity, openness and stability.
Under extreme field conditions, the setting of a GAIN potentiometer of a smaller levels,
stabilize the metal detector, which allows to achieve better depth of detection after adjust the
sensitivity and the behavior of the metal detector by THRESHOLD and SILENCER
potentiometers.
The GAIN potentiometer must be reduced to a level less than level "6" and in the presence of
strong external interference and/or other factors that cause visible instability of the metal
detector.
Because their primary function, the setting of the GAIN potentiometer affect to the other settings of
the metal detector, and especially on setting of its ground balance and its audio threshold. For this,
is desirable its setting to be done before the rest of the metal detector settings, or after any change
of the GAIN potentiometer, to be done complete setup of the metal detector.
BLISSTOOL LTC64X
- User Guide (version EN201405101504)
Page 31 of 42
