I know that there are charts available for many of the US coins. And, I also know that TID numbers can vary with soil conditions, depth, angle etc..... But as I was going through some of my coins this weekend, I decided to scan some of them (air test) that I've not seen the numbers posted for. This doesn't mean someone hasn't posted them. It just means I haven't seen them. I found it interesting how much variance there is between like coins of the same vintage. Here is what I found, using my 6 X 8 butterfly coil...... If there are more than one number for either ferrous or conductive, that means I tested more than one of these coins. I also posted a few that surprised me with their TID.
1859 IH cent 12 / 22
1862 IH cent 12 / 23
other various IH cents 11 / 37, 38
12 / 27, 28
12 / 31, 32, 33, 34, 35, 36, 37, 38, 39
US 2 cent pieces - 11-12 / 40, 41, 42
US 3 cent nickel - 12 / 02
US 3 cent silver - 12 / 29
US Seated Dimes - 11-12 / 41, 42, 43, 44
US Barber Dimes - 11 - 12 / 42, 43, 44, 45
US Seated Quarters - 11 - 12 / 44, 45, 46
Barber Half dollars - 02 / 44, 45
1894 Barber Half - 08 / 46
1928 WL half - 08 / 46
1945 WL half - 03 / 45
various WL halves - 03 / 45
04 / 44, 45, 46
07 / 46
1952 Franklin half 01 / 43
1954 Franklin half 01 / 44
various Morgan dollars 01 / 38, 39, 40, 41, 42
1 Oz Silver Liberty .999 01 / 34, 35
1906 $5 gold 12 / 31
1/2 ounce gold Eagles 11 - 12 / 39, 40
1 ounce Gold Eagles 11 - 12 / 43, 44
1 ounce Gold Buffalo 01 / 44
HH Randy
1859 IH cent 12 / 22
1862 IH cent 12 / 23
other various IH cents 11 / 37, 38
12 / 27, 28
12 / 31, 32, 33, 34, 35, 36, 37, 38, 39
US 2 cent pieces - 11-12 / 40, 41, 42
US 3 cent nickel - 12 / 02
US 3 cent silver - 12 / 29
US Seated Dimes - 11-12 / 41, 42, 43, 44
US Barber Dimes - 11 - 12 / 42, 43, 44, 45
US Seated Quarters - 11 - 12 / 44, 45, 46
Barber Half dollars - 02 / 44, 45
1894 Barber Half - 08 / 46
1928 WL half - 08 / 46
1945 WL half - 03 / 45
various WL halves - 03 / 45
04 / 44, 45, 46
07 / 46
1952 Franklin half 01 / 43
1954 Franklin half 01 / 44
various Morgan dollars 01 / 38, 39, 40, 41, 42
1 Oz Silver Liberty .999 01 / 34, 35
1906 $5 gold 12 / 31
1/2 ounce gold Eagles 11 - 12 / 39, 40
1 ounce Gold Eagles 11 - 12 / 43, 44
1 ounce Gold Buffalo 01 / 44
HH Randy