Hey Tom,
I put the 8" on went back to my modified coin program, and decided to run auto with no plus or minus.
Went to an empty lot near my home. I live in an old section of town.
Had hunted the lot before using the pro coil and found 6 or 7 wheats but no silver.
This time pulled a couple wheats and a merc(5" or so) out of an iron trash area, so was feeling alot better. Also checked the hits before digging with ttf.
Went back to mod coin program because the conduct sounds better to me. Hit another wheat and hunted that little area for awhile and then moved to a part of the lot I hadn't hunted much.
There's quite a bit of big targets in the ground(the house was torn down just a few months ago). I get a big hit and had silver sound and 11,12 and 45-47 numbers, I was hoping maybe a quarter, dug about 5" maybe a little more and pull out a disk, I thought get down, a half. Rub the edge and see silver, but was thinking thats to big to be a half. So I rub a little dirt off, it was starting to get dark, couldn't see anything where I rubbed off the dirt so rubbed off some more and couldn't really see anything. Thought well crap it's just a disk, couldn't feel any reeding around the edges and at this point to dark to see. So when I got home and washed off the dirt, hot damn a morgan silver dollar. It is the most worn coin I ever dug but the eagle is on the back and lady liberty on the front, having trouble making out the date but appears to be 1892. If I can, will post a pic. It is worn to beat hell but is diffidently a morgan. First I ever found.
Anyway appreciate your suggestions and will give long tones another try. Have tried it before but for a short time as it didn't sound good. But will give it a go.