My view of how a detector works is that it samples a bucket of dirt under the coil to see if there is a signal consistent with a coin or other target and responds accordingly. It does not really look at individual targets but considers everything in the bucket at once. So if there is a pull tab, penny, and nail the reading you get is for all three combined. My explanation of detector behavior goes from here.
I also think a detector samples several buckets of soil and targets as it sweeps over the ground. So if some bucket or successive buckets have the coin signature in them the detector rings coin.
This is why close targets can make identifying a coin or other target difficult. It all adds up. While the detector may give a high coin tone it is difficult to find exactly where it is. Only by going over the exact spot do you get the best id you can. Otherwise other things get added in.
Close targets also make pinpointing difficult because of the same reason. The other targets contribute to the location until you are exactly on top of the target and it is difficult to get the Exp II to detune to the exact target strength you need to ignore everything else and pick the right target. As I said I have a good idea where the target is before I pinpoint especially when there are several targets.
I find that a coin can light up other targets around it, so to speak. Since some target on there own are not good enough to ring in the coin can get added into their score and ring in as a good target even though they are not. If I can remove the coin or other strong target they often disappear entirely. The advice when in doubt dig is good for high tones unless there is a good reason to ignore it.
I do think increasing sensitivity and gain raises the numbers. Primarily cause it adds in other things. I sometimes get a high tone cause a piece of tin foil is down there with some other target and they add up. Raising sensitivity and gain increases the physical area sampled (bigger bucket) used by the detector so it is more likely to include the extra targets.
Also there is iron in a lot of our soil so increasing the sensitivity or gain increases the amount of iron included in the sample and the size of the bucket. The iron numbers go up. And of course there may be a nail hiding out down there somewhere that gets included.
Anyone disagree or can add to this please respond.
I also think a detector samples several buckets of soil and targets as it sweeps over the ground. So if some bucket or successive buckets have the coin signature in them the detector rings coin.
This is why close targets can make identifying a coin or other target difficult. It all adds up. While the detector may give a high coin tone it is difficult to find exactly where it is. Only by going over the exact spot do you get the best id you can. Otherwise other things get added in.
Close targets also make pinpointing difficult because of the same reason. The other targets contribute to the location until you are exactly on top of the target and it is difficult to get the Exp II to detune to the exact target strength you need to ignore everything else and pick the right target. As I said I have a good idea where the target is before I pinpoint especially when there are several targets.
I find that a coin can light up other targets around it, so to speak. Since some target on there own are not good enough to ring in the coin can get added into their score and ring in as a good target even though they are not. If I can remove the coin or other strong target they often disappear entirely. The advice when in doubt dig is good for high tones unless there is a good reason to ignore it.
I do think increasing sensitivity and gain raises the numbers. Primarily cause it adds in other things. I sometimes get a high tone cause a piece of tin foil is down there with some other target and they add up. Raising sensitivity and gain increases the physical area sampled (bigger bucket) used by the detector so it is more likely to include the extra targets.
Also there is iron in a lot of our soil so increasing the sensitivity or gain increases the amount of iron included in the sample and the size of the bucket. The iron numbers go up. And of course there may be a nail hiding out down there somewhere that gets included.
Anyone disagree or can add to this please respond.