I finally had an opportunity to take my Fisher F4 out this afternoon. There's a newer middle school around the corner from my house with grassy fields, with tot lots with wood chips and tot lots with sand. Although there's no chance of old coins, it's a good producer of modern clad and makes a good test bed to learn the ropes on a new machine.
I used the DD coil (first time I've used one) and it's a coin rake!! I was able to run max sensitivity, and it had good depth, and very accurate target ID's. After a few zinc pennies locked on (the TID was spot on), I quit digging them. I dug all foil and pull tabs (which wasn't much), just in case, and although no bling appeared today I was surprised to get a fragment of aluminum about 7" deep which was about the size of say half a standard sized wooden match, but as thin as an aluminum can. I thought that was impressive. After about an hour and a half of hunting (and a large audience of kids now following me around...why does that happen
I ended up with four quarters (and one screw cap that hit like a quarter), seven dimes, several nickels and pennies for a total of about $2 in modern coins.
My biggest treasures of the day - I got really excited when I dug the first one, it was a half dollar sized [size=large]golden[/size] colored LASER TAG token good for one free game of Laser Tag
I ended up with two of those gems. Now if I can figure out where this place is, I can get my laser tag on 
Pinpointing was pretty easy, although I was tricked a few times
The F4 i's ultra light, even with the big 11" DD coil. I also have the 10" concentric coil, so that will be the next test, maybe at the beach this weekend if the weathers nice. Overall, at least thus far, I'm impressed with the F4 (I wonder what the F5 will bring to the table
).
Cal
I used the DD coil (first time I've used one) and it's a coin rake!! I was able to run max sensitivity, and it had good depth, and very accurate target ID's. After a few zinc pennies locked on (the TID was spot on), I quit digging them. I dug all foil and pull tabs (which wasn't much), just in case, and although no bling appeared today I was surprised to get a fragment of aluminum about 7" deep which was about the size of say half a standard sized wooden match, but as thin as an aluminum can. I thought that was impressive. After about an hour and a half of hunting (and a large audience of kids now following me around...why does that happen
My biggest treasures of the day - I got really excited when I dug the first one, it was a half dollar sized [size=large]golden[/size] colored LASER TAG token good for one free game of Laser Tag


Pinpointing was pretty easy, although I was tricked a few times

Cal