Got out to a new site with my buddy Bill yesterday, part of an old military base, now woods. First target was a 50 cal shell, biggest I've dug yet, and we knew we were in the right area. The area gets a little bit of modern use as a running trail and party spot, so clad coins were popping up here and there. Targets were few and far between, very little trash, which made it an enjoyable "quiet hunt". But, I did manage a '29-S wheat and '42-S and '43 mercury dimes, in addition to several clad coins and numerous firearm brass casings. The '43 merc is where I learned my lesson. On the F75, silver dimes for me have ALWAYS read in the ID range of 75-77, while clad dimes are reliable for a 72-73. So, as you probably have already guessed, I got a very shallow 73-73 signal, no ID bouncing, and expected to dig another clad dime, flipped over the leaf litter, and a shiny new '43 merc revealed itself. Only the side that had been in contact with the ground was slightly browned, but the heads side was shiny new. Never dug one in this condition. Got me thinking about how most of my mercs are deep targets dug in turf environments, where oxidation may play a part in changing the numeric signal that the F75 reads. I dug this particular dime using 2F tones, so I couldn't say if it sounded appreciably different from a clad dime, which is the case when I use Delta Pitch tones. I pass up a lot of mid-depth & deep 72-73 signals in the turf, because my experience has told me they are NEVER silver dimes. I'm guessing I'm wrong. Or maybe my 'rule' only applies to silver dimes in the turf that have undergone oxidation.
Happy hunting gang.
Jim
Happy hunting gang.
Jim