syclone0182
Member
how can i tell if the preset groundbalance on my cibola is set wrong ? thanks jamie
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cibola
- Thread starter syclone0182
- Start date
Hold the pinpoint button down with the threshold set so you get an audible but low volume tone.
Search for an area of ground where the tone does not change while moving the coil sideways at about an inch above the ground maintaining the same distance from the ground. Indicating no metal under the coil.
While holding the pinpoint button down, move the coil up and down from an inch from the ground to about a foot and back to an inch a number of times. You will probably hear the tone volume changing as it goes up and back down.
If the tone does not change much, it is balanced to the ground in that spot. If it raises when the coil is lowered, it is set positive, If it lowers or goes away when the coil is lowered, it is set negative.
It does not take much of a change in ground balance setting to make a seemingly large difference in the threshold change when moving the coil up and down. So you may get what seems like a lot of change and not be way off on the setting. If you could set it you could get used to how much adjustment versus threshold change means way off.
My Cibola at the factory preset was on the positive side most places I'd go. It did very well at that setting. It's now been modified to add ground balance control ... but that's not this discussion.
tvr
Search for an area of ground where the tone does not change while moving the coil sideways at about an inch above the ground maintaining the same distance from the ground. Indicating no metal under the coil.
While holding the pinpoint button down, move the coil up and down from an inch from the ground to about a foot and back to an inch a number of times. You will probably hear the tone volume changing as it goes up and back down.
If the tone does not change much, it is balanced to the ground in that spot. If it raises when the coil is lowered, it is set positive, If it lowers or goes away when the coil is lowered, it is set negative.
It does not take much of a change in ground balance setting to make a seemingly large difference in the threshold change when moving the coil up and down. So you may get what seems like a lot of change and not be way off on the setting. If you could set it you could get used to how much adjustment versus threshold change means way off.
My Cibola at the factory preset was on the positive side most places I'd go. It did very well at that setting. It's now been modified to add ground balance control ... but that's not this discussion.
tvr
syclone0182
Member
thanks tvr
syclone0182
Member
this might be a stupid question but can i change it or do i need to send it to tesoro? if i can how do you do it? thanks jamietvr said:
Generally, if your detector is a bit on the positive side in most places you hunt, it is set pretty much where you want it to be.
The Cibola only has one readily adjustable component inside on the circuit card. It is the ground balance trimmer. It is a tiny surface mount component. You really ought to have a proper electronic trimmer adjustment tool to adjust it even though a small screw driver may fit. These surface mount trimmer pots do not take much force and if not handled with a light hand can be broken.
If you have any experience with small trimmers and have a trimmer tool, you can probably adjust it with out a problem. It takes very little movement of the trimmer to make a large change in the ground balance. I don't recall which way the trimmer turns to move things positive or negative but it is apparent while adjusting and re-checking. It is very easy to over shoot on the adjustment.
Before you try changing anything, let me say one thing again: generally, if your detector is a bit on the positive side in most places you hunt, it is set pretty much where you want it.
If in doubt about adjusting, and you think it is way off as it is, call the factory and see what they want as far as a dirt sample that represents your normal hunting areas and send it in all.
tvr
The Cibola only has one readily adjustable component inside on the circuit card. It is the ground balance trimmer. It is a tiny surface mount component. You really ought to have a proper electronic trimmer adjustment tool to adjust it even though a small screw driver may fit. These surface mount trimmer pots do not take much force and if not handled with a light hand can be broken.
If you have any experience with small trimmers and have a trimmer tool, you can probably adjust it with out a problem. It takes very little movement of the trimmer to make a large change in the ground balance. I don't recall which way the trimmer turns to move things positive or negative but it is apparent while adjusting and re-checking. It is very easy to over shoot on the adjustment.
Before you try changing anything, let me say one thing again: generally, if your detector is a bit on the positive side in most places you hunt, it is set pretty much where you want it.
If in doubt about adjusting, and you think it is way off as it is, call the factory and see what they want as far as a dirt sample that represents your normal hunting areas and send it in all.
tvr
syclone0182
Member
thanks again i think i better leave it alone .