Sugar
Watch NebTrac's video here and you will get a feel for why you should open up your pattern to include all the way down into the 20's ferrous on the etrac.
Go to the 4:00 minute mark in the video and watch and listen to this dig. It is a wheat penny coming in at 20-43 / 22-43. If you only have the 12 line open you would miss this target and get a null when you move the coil over it. This could very easily been a silver dime as I have dug mercs that come up just like this.
Hope this helps a little. Sometimes it is easier to see and here the machine then it is for me to explain.
http://www.youtube.com/watch?v=NlJIM9af6LE
Watch NebTrac's video here and you will get a feel for why you should open up your pattern to include all the way down into the 20's ferrous on the etrac.
Go to the 4:00 minute mark in the video and watch and listen to this dig. It is a wheat penny coming in at 20-43 / 22-43. If you only have the 12 line open you would miss this target and get a null when you move the coil over it. This could very easily been a silver dime as I have dug mercs that come up just like this.
Hope this helps a little. Sometimes it is easier to see and here the machine then it is for me to explain.
http://www.youtube.com/watch?v=NlJIM9af6LE