On Sun, 19 Jan 2014 16:27:50 -0500, "Joe Roberts" <josep...@att.net
Snipped for brevity
The XP Deus uses approximately those frequencies. The actual's are:
From what I have been reading, the 17.6 frequency is used to detect
smaller low conductivity items such as small gold chains.
From the manual are the following descriptions relative to frequency:
Large, mainly ferrous and non-ferrous masses.
Coins of sufficient conductivity and size.
All other medium or relatively small targets in non-mineralized ground
uncontaminated by iron.
Good for ferrous masses and militaria.
Coins and large masses, militaria.
Medium and small targets in low-mineralized ground.
General use, small coins.
Coins of all sizes in medium to highly mineralized ground.
Small coins made from any alloy (gold, silver, copper, etc.) and
bigger but very fine coins,
low conductivity gold coins, lead, rings, sheet metal, aluminum foil.
Small objects can be found even on mineralized ground contaminated
Discriminates (distinguishes) coke more easily.
More unstable on non-mineralized and moist ground.
One thing I also found interesting has to do with operating in the
"Wet Beach Mode":
1. Selection of Wet Beach Mode activates calculation of the ground
balance on the zone corresponding to highly saline wet ground, so as
to reduce interference caused by conductive salt water.
After selecting Beach ON, you need to adjust the ground balance
manually or by pumping on the wet zone concerned, in order to cancel
out the ground signal.
2. In Manual Mode, adjust it from 00 to 30
3. To improve stability on wet beach (salt water):
Reduce Audio Response (0-1)
Increase Reactivity (4)
Power: Level 1 maximum.
The sort of standard default manual GB number for general use is 90.
All of the canned programs default to 90 with the exception of the wet
beach mode. The default GB for it is 27.
Since I don't get to saltwater beaches I have to assume it's a lot
tougher to ground balance. The user manual recommends "in situ" GB
setting somewhat frequently.
Just thought you might find that interesting. I did:)