How To Get maximum Depth using Your AT Series Detector

John-Edmonton

Silver Member
Mar 21, 2005
4,399
3,950
Canada
Detector(s) used
Garrett- Master Hunter CX,Infinium, 1350, 2500, ACE 150-water converted 250, GTA 500,1500 Scorpion, AT Pro
* With the AT Pro, learn and hunt in Pro mode. It is deeper then standard mode. With the AT Gold, the all metal mode is deeper then Disc 1 or Disc 2.


* Has a place been hunted out? Go back and try again after a good rain soaking. Moist wet soil gives better sensitivity and greater depth readings for targets.


* If you get a nice high aHow To Get Maximum Depth + Performance Out Of Your AT Series ( Pro & Gold)
udio and a VDI in the 70's or 80's, dig it.


* The larger the coil the deeper it goes. However, too many targets under a large coil can mask a good target. If you get a slight good audio using the large coil, lift it up 2-3 inches and center the coil where the good audio was. Often times the good target will be much clearer.


* Get a coil cover and scrub the ground. Some people scan the ground inches above it...."DON'T" You can gain a couple of inches scrubbing, which is significant.


* Don't swing too fast! Just because it has a very fast "recovery speed"......doesn't mean it can always pick out that one good silver coin amongst several pieces of junk. The electronics still need to process lots of information.


"SWING TOO FAST, YOU WILL COME IN LAST"


* Swinging too fast can make you a sloppy hunter. You also risk eventually cracking/breaking your coil and elephant ears from the constant banging on trees, playground equipment or concrete.


* If you are getting lots of EMI or increased mineralization which is causing erratic audio, try adjusting your discrimination first, before lowering the sensitivity. This sometimes lets the machine run smoother without losing any depth.


* If you get mixture of audio signals, scan the target from different directions. Sometimes a good target is beside or partially underneath a good target. The AT Series has a unique ability to pick out those good targets amongst the trash. Going at the target from different directions allows the AT Pro to perform even better!


* Ground balance your machine occasionally. Temperature can change, and directly affect the settings. Hunting in shade vs. sun can vary. "a 14 degree difference on a lawn area to a 35 degree difference on a parking lot." But, the mineralization can also change between areas....so again...ground balance periodically.


* To increase the depth/sensitivity to silver targets, lower the ground balanced numbers 5-10 points

* If you are hunting an area that is absolutely covered with nails, try ground balancing out a nail until it is nothing but a small amount of static. Now....all the copper & silver targets will give a loud audio response....BUT the target ID will be off.

*Bottle cap? Stomp hard on the target. often times, an old bottles cap's halo will break, and the reading will change from a good coin sounding target to a bottle cap or junk.
Don't forget to use the iron audio feature if searching for coins or silver.

* Build a test garden...use good & bad targets at different depths. You will soon discover that deep silver targets beyond depths of 8 or more inches begin to not sound off as a high pitch or that the VDI numbers remain in the 80's. That is very good information to know. My rule of thumb states if it's deep....it's old. Dig it! It costs you nothing.

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Last edited:

Uncle Jeff

Hero Member
May 28, 2013
700
323
Tampa, Florida
Detector(s) used
Garrett AT Pro -
Garrett Pro Pinpointer AT -
TEKNETICS EUROTEK PRO -
Garrett Pro Pinpointer
Primary Interest:
All Treasure Hunting
Great post! Thank you for taking the time to share your knowledge. I have only had my ATP a few days now and this is invaluable to me :)
 

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John-Edmonton

John-Edmonton

Silver Member
Mar 21, 2005
4,399
3,950
Canada
Detector(s) used
Garrett- Master Hunter CX,Infinium, 1350, 2500, ACE 150-water converted 250, GTA 500,1500 Scorpion, AT Pro
Great post! Thank you for taking the time to share your knowledge. I have only had my ATP a few days now and this is invaluable to me :)

There seems to be a few people struggling with bottlecaps on detectors. DD coils are infamous for liking them. When coin hunting, I prefer to use a concentric coil. I can read much better accuracy with one in both tone & VDI numbers.
 

bush13st_beav3r

Full Member
Apr 22, 2013
224
50
Primary Interest:
All Treasure Hunting
There seems to be a few people struggling with bottlecaps on detectors. DD coils are infamous for liking them. When coin hunting, I prefer to use a concentric coil. I can read much better accuracy with one in both tone & VDI numbers.

May haveto order me a concentric and 5x8... What size do you recommend on concentric for the atp john?

-beav3r
 

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John-Edmonton

John-Edmonton

Silver Member
Mar 21, 2005
4,399
3,950
Canada
Detector(s) used
Garrett- Master Hunter CX,Infinium, 1350, 2500, ACE 150-water converted 250, GTA 500,1500 Scorpion, AT Pro
May haveto order me a concentric and 5x8... What size do you recommend on concentric for the atp john?

-beav3r

Any size will do really. It depends more on the amount of mineralization you typically hunt in. If it's low, the larger coil will give you greater coverage and probably a little more depth, but you will sacrifice a little quality in real junky areas due to poorer ability to pick out a nice target amongst several under your coil at once. But then again, the 5 x 8 will cover junky areas nicely. If you have moderate amount of mineralization, the smaller concentric coil would do better.



Either way, if you get a concentric coil, put a white dot on the front inner toe of the coil. use this to pinpoint and you will be dead on.

pinpointing.jpg
 

bush13st_beav3r

Full Member
Apr 22, 2013
224
50
Primary Interest:
All Treasure Hunting
Yea, I had a sticker I placed on my ace coil....really wish I could just use that!...dam frequency differences...grrr. o well, thx john

-beav3r
 

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John-Edmonton

John-Edmonton

Silver Member
Mar 21, 2005
4,399
3,950
Canada
Detector(s) used
Garrett- Master Hunter CX,Infinium, 1350, 2500, ACE 150-water converted 250, GTA 500,1500 Scorpion, AT Pro
Yea, I had a sticker I placed on my ace coil....really wish I could just use that!...dam frequency differences...grrr. o well, thx john

-beav3r
I just use a drop from a bottle of white-out from the dollar store.
 

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