Garrett Infinium 3x7 DD Double D Pulse Induction Coil (draft)

This is the 3x7 in. Double D coil for the Garrett Infinium Advanced Pulse Induction metal detector. Some will tell you this is good for river bed crevasses while prospecting and in trashy areas.
 
Limited depth is this coil's weakness, but it will still go 6 or more inches on a gold ring depending on it's size. The big gain here is that this coil will let you hunt where there is too much electrical or radio frequency interference for the other infinium coils to work right at all. So it's sometimes like my "secret weapon" that I only use rarely. And when the false signals from wave swells in the salt water make you turn up the discrimination (also tuning out small 1/2 gram and up gold and diamond earrings), This coil will NOT give those false signals so you can turn discrimination all the way down (off)!

Very small gold from salt water is a tall order that this coil can deliver.
 
Getting back to the Volleyball courts, I could have just picked these things up with my AT Pro because it is a high frequency machine (15Khz).

Metal detectors with a lower frequency would have probably ignored these items because of their small sizes. My 7.5 Khz GTA350 can bareley see any of them at 1 inch, my Fisher 1280-x 3.5 Khz ignores them almost entirely.

The coil is not for scuba but has worked just fine in less than 10 foot of water, and so far hasn't leaked. Even though it is a tiny coil, because of the "Blade" type of foot print it makes when "seeing" through ground it is not much different for ground coverage than the 8 inch mono coil that has a "Cone" shaped footprint.

The dry sand part of the beach is not flat so the little coil hugs the ground well in footprints and can be pushed into the sand somewhat easily. I did find all these things with it on 2 different occasions within 1 hour in dry and wet sand, all were found in and around Volleyball courts except the large square earring next to the gold tooth which was found in the surf:



Pinpointing with a small coil is great but you better bring your pin-pointer for when these guys fall through your coin scoop holes over and over (it can drive ya nuts!)



I was hoping the slightly bigger 10X5 inch sized double D coil for the Infinium would have also ignored the wave swells that the 3x7 eliminated but after purchasing and trying one, I am sorry to say it did not. On top of that, I could hardly keep the coil underwater because of the air inside. It does however eliminate power interference quite well in my area.

It detects deeper than the 3x7 and pinpoints like a dream in Volleyball courts so I will now use the smaller one for wading only.