Thursday's hunt in B'more brought up some firsts for me. First Large Cent and mini-ball in this park and the 12th IHP, 8 wheats in all today, some old jewelry pieces, a medallion and clay marble.
1970 COMPASS-
WHITES SILVER EAGLE-
WHITES DFX, 4X6DD COIL, 6X8DD COIL, 950 COIL, 10X12SEF COIL-
GARRETT PRO POINTER AT, GARRETT AT PRO , MINELAB EXPLORER SE with 8.5x12.5 Cors coil
The site was open land at the time of the Civil War. The fact that there was a Union encampment nearby may account for the mini-ball. It is interesting that that makes the fifth or sixth bullet of any type that I pulled from that immediate area.
The F75 with the NEL Tornado appears to be reaching deeper. That being said, these signal are faint. Reproducible, but weak. Perhaps with Gray Ghost head phones they'd be better heard.
I had been out for about 4 hours and had not found an Indian, and was hoping the "next" signal would be it. I was working an arbitrary line to a tree and was turning up good target after good target. That's when the Indian was found.
I only use sensitivity of 30. I saw a video where a guy had a long standing test garden and was still hitting dimes at 8" on sensitivity 0. At 30, I get no chatter (I don't have the upgraded version).
Most of the time I discriminate out iron and foil, so disc at 25, I think. I understand the argument about small gold in the foil range, I just don't care, I'm fine missing those items.
I use 3 tone as well.
I use default program most of the time. In newer parks and soccer fields, I tend to use jewelry mode.
These are my common settings. I actually decide at each location how I'm going to run my machine based on the type area I'm going to search and how old it dates.
My only suggestion is that you dig any clean tone when the VDI doesn't move, regardless of the number it shows.
Your find was there because of an old house. I can explain the mini-ball from the days of the Union encampment here, and, perhaps that would also explain the LC.
Thanks Capt., I did see a video where it was demonstrated that little depth is lost with the F75 down to sens: 70. I should try it lower and see if the diminished response from surface trash makes a difference. The area I'm detecting now has been used from Civil War times. So I've found 1800s buttons, the LC, numerous Indian head pennies, wheats to modern coins there. I judge the area to not much more than a half acre.