A
Anonymous
Guest
<span style="background-color:#ffff00;">It is not possible to cancel or compensate for all ground minerals because there are no perfect linear electronic components.</span>
<STRONG>If we cancelled all ferrites in the soil minerals, we would also cancel <STRONG>some good targets in some soils</STRONG>.</STRONG> Without going into time constants it is simply that some desirable targest look like natural ferrite.<span style="background-color:#ffff00;"> So some ground mineral signals not being cancelled helps to find those goodies</span>. This is similar to OFFSET in some other detectors.
<STRONG>The problem is the electronics also age so the amount of ground signals can increase beyond an acceptable level.</STRONG> The front end of the receiver have summing resistors and capacitors that are on the outputs of the demodulators for short, medium, and long time constants. <span style="background-color:#ffff00;">Fixed resistors can be changed or have trimmers to adjust for the changes as the detector ages and to compensate for the nonlinear properties of electronic components.</span> We all know of trimmer capacitors and resistors used in other devices and those in detectors. Some guys will send their detector back to the manufacture to be "tuned" up after a few years of use due to aging or drifting of circuits.
There is a better way to accomplish this to compensate for aging and external variable to keep the ground signal to the desired point and also to reject exteranl variables that are not desireable. <span style="background-color:#ffff00;">While there may well be trimmer components that only need to be adjusted during final testing and assembly and rarely after that there are some that need to be adjusted more often.</span>
The explorer is a very high gain sensitive piece of electronic equipment ans as such can be affected by heat and cold from moving from direct sunlight on a hot August day to the shade of a tree.
The explorer monitors external variables in Semi-auto and adjusts for the variables I have mentioned. We can make those adjustments in manual or let the detecto do this for us. This is user preference and should not be a concern to any of us as to which is prefered.
We often hear or read how important it is to maintain stability but don
<STRONG>If we cancelled all ferrites in the soil minerals, we would also cancel <STRONG>some good targets in some soils</STRONG>.</STRONG> Without going into time constants it is simply that some desirable targest look like natural ferrite.<span style="background-color:#ffff00;"> So some ground mineral signals not being cancelled helps to find those goodies</span>. This is similar to OFFSET in some other detectors.
<STRONG>The problem is the electronics also age so the amount of ground signals can increase beyond an acceptable level.</STRONG> The front end of the receiver have summing resistors and capacitors that are on the outputs of the demodulators for short, medium, and long time constants. <span style="background-color:#ffff00;">Fixed resistors can be changed or have trimmers to adjust for the changes as the detector ages and to compensate for the nonlinear properties of electronic components.</span> We all know of trimmer capacitors and resistors used in other devices and those in detectors. Some guys will send their detector back to the manufacture to be "tuned" up after a few years of use due to aging or drifting of circuits.
There is a better way to accomplish this to compensate for aging and external variable to keep the ground signal to the desired point and also to reject exteranl variables that are not desireable. <span style="background-color:#ffff00;">While there may well be trimmer components that only need to be adjusted during final testing and assembly and rarely after that there are some that need to be adjusted more often.</span>
The explorer is a very high gain sensitive piece of electronic equipment ans as such can be affected by heat and cold from moving from direct sunlight on a hot August day to the shade of a tree.
The explorer monitors external variables in Semi-auto and adjusts for the variables I have mentioned. We can make those adjustments in manual or let the detecto do this for us. This is user preference and should not be a concern to any of us as to which is prefered.
We often hear or read how important it is to maintain stability but don