Whites 10DD coil

[KRS]

Well I got my new loop Sat. took 10 days to get here, talk about slow mail. It worked well and was stable at 75 and pre at 3 sometimes at 4. Found 2 clad quarters and one dime 15 pennies all but two were zinc, the deepest was a wheat at 6in. Nothing to crow about but fun. the coil was well balanced with my DFX. I would have found everything with my 950, I was hoping to find a silver dime at this place but no luck. Ken

 

[Larry (IL)]

What kind of ground are you hunting in Ken? The 10D[sup]2[/sup] works best in very mineralized ground. In medium mineralization, it is pretty much a draw on depth and mild ground the 950 is often the winner.

 

[KRS]

Well I used it again today, I guess my ground is about medium. I found a few clad and three wheats nothing over 4in. deep, It doesn't seem to get any deeper than my 950 and the 950 is easier to swing. Thanks for the info..........Ken

 

[BarberBill]

Your experience points out something I've often wondered about. Am I not getting the depth or is there nothing very deep at the particular location I happen to be hunting? Playing with deeper targets in a test garden would probably give the answer. Your DD coil should do somewhat better than the stock coil if you happen to be hunting in fairly to heavily mineralized ground.
BB

 

[KRS]

Hello Larry, what VDI would low, med. and high mineralize ground read? Thank you Ken

 

[Larry (IL)]

There is the right way to calculate mineralization than just the VDI, it is outlined in Jeff Fosters book, Digging Deeper with the DFX. I'm sure someone will come up with the process if you don't have his book. I use the very simple method of reading the DC Phase over clean ground. My ground is -93 and is considered highly mineralized. I have heard said that -80's is considered medium and -70 to 0 is on the low to no mineralization. For an accurate number, I would use Jeff's formula.

 

[;hgarr]

Hi KRS, here is some information taken from a question taken from another member....HH...How

Hi nocaljim: nc-joe has some good advice. To elaborate a little further, getting an accurate ground VDI reading requires the ground balance to be spot on, or the VDI reading will bounce all over the place. Other cause of bounce, even with a correct ground balance, is very high positive or negative mineralization (testing for ground balance, holding back the trigger or locking it forward to place in all metal mode, as the loop is lowered toward the ground, a perfectly balanced machine will not change in threshold loudness or pitch). A positive balance means the threshold will get real loud as the loop reaches an inch of the ground. Likewise, a negative balance means the threshold will go quiet as the loop reaches the ground, neither one being a good ground balance point. On the other hand, measuring the mineralization level of the ground is better done (rarely seen on most forums), by reading the ground's coarse GEB measurement, after a careful perfect ground balancing point is achieved. Furthermore, there is a lot of information in the GEB reading. For instance,CGEB 117 to 121 (really heavy Magnatite black sand) is extremely negative soil requring the adjusting of both the Fine GEB and Coarse GEB settings, and the ground balance test is so non linear that a good ground balance point is almost impossible to achieve. However, CGEB 122 to 127 (slightly gray, orange, red or pale soil) is pretty neutral ground and does not need such a precise ground balance point (unless a darker color from moisture, making the CGEB read much higher), which in these middle GEB readings, except at near the ends, almost any balance point will work nicely. But, at the high ,very positive end of CGEB, non linearity again rears its ugly head at about CGEB 128, and gets impossible to to get a usable operating balance when reading near 129,5 (white Caliche/alkali soil or red Heimitite soil) but could still be balanced out to near CGEB 133 (on very black sand Maghemite soil, the worst stuff imaginable). All this information is provided to expalin roundabout that if this area reads the same CGEB ground condition as the other place your were hunting, it should be huntable with no ground balancing or other adjustments necessary. I hope this might be of help in understanding some of the meanings of ground minerals and the importance of a good ground balance.All this is meant to show that an VDI reading on a coin is easy and fairly accurate, but can be a bear to get a repeatabler ground reading, whereas a GEB reading is made solely for reading the ground mineral conditions to aid in maintaining ground balance. Also see Larry-il comments below ..Best of hunting ot you in your area,....How

 

[KRS]

Thank you for the reply Larry. I have foster's book. I check my ground with the phase method, it checks in the high 80's and low 90's. I'll din into Jeff's book and see what it says. It looks to me that the ground has a great likely hood to change from place to place or from one corner of the park to the other.........Ken

 

[KRS]

Thank you for the information, I'll have to print this and have it with me when I check the ground, I can still read well enough but the memory is on the down side............Ken