Well here is what happens. I went to the park I hunt normally, now remember i am in Costa Rica so you have to picture the following scenario.
We live in a country that was created by volcanos, actually around the capital there are like 4 of them. So soil is mineralized. Second, electric current is still distributed with air lines, even though by the park that I hunt there aren't any.
Third, people have no education, so you will find lots of trash in parks because they are too lazy to walk up to the waste basket to properly dispose of them.
So that been said, I went out, and obviously ground balanced the detector. Started and there were lots and lots of signals all over the place, used discrimination but realized that most of the targets were trash even with the discrimination set properly.
Ok here is what I found to be different than with my v3i. With my v3i I know that a square pull tab will be always a good signal with a vdi of 25-26, a screw bottle cap will be a good signal with vdi of 64 (if I remember correctly), now a good 25 colones signal will be around 52 of vdi and old coins will be around 70. Also the plot analysis can tell me 90% of the time if its worth digging or not. Maybe I got too dependent of this system but I find it to be very accurate and it Will most likely not fail to I.d. A coin.
With the tejon, I wasn't able to distinguish a good signal from a bad one, sometimes bad sounded good, sometimes good sounded bad.
If I rely 100% on my ears even with the v3i I get fooled, but with the complement of the screen I can confirm or not what sounded like a good target. With the tejon confirmation is impossible even turning the disc up.
I am not in the us and discrimination is quite different here, I need to dig signals in the pull tab range and in the bottle cap range in order to find the good stuff, and coins are almost all made of the same materials they only vary in sizes, old ones are even more difficult to distinguish from the trash.
Silver coins are as rare as a back sheep, they were all discontinued in 1915, so in order to find silver you need to go to old places, that are also impossible to find since most old parks have been destroyed and the actual parks aren't older than 50 years.
So you now might understand why it is so difficult to hunt here.
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