AT Pro on the Beach advice

banjonyc

Jr. Member
Sep 13, 2012
84
33
Brooklyn NY
Detector(s) used
Garrett AT Pro, White Beach Hunter ID 300, minelab Excalibur II
Hi,

So I just got an AT Pro and went to Rockaway beach to run it through some paces. I already have an amazing Whites Beach Hunter, but I wanted a device that I could do some relic hunting on dry land and also use it on the beach. It is much much lighter too than the Hunter. I had a frustrating day and so I need some insight. This might be long, but I want to get out some points and I tend to ramble.

First, I was falsing a lot. Let me explain. With the Beach hunter, you can literally skim the sand with the coil. This gives you optimum reading. I rarely get a false reading when using the whites. I tried to skim the sand with the AT Pro and it would give a nice bell sound that indicated a coin, but i knew there was nothing there as the bell would happen on the beginning and end of my swing. In addition, when i tried to dig a coin and set the coil down on the sand behind me, it would also ring as if it were on a coin. I stopped skimming the sand and did my swing about 1/2 inch above it. I still would get an indication there was a coin, but again it would be at the beginning or end of a swing. I would check by doing an X pattern and the bell sound would not happen, so no coin.

My question is, what am I doing wrong here? The machine was grounded and I tried a few settings to notch out iron etc. It is frustrating because I want to get a nice bell sound only when there is an actual coin.

Thanks
 

Upvote 0

Sand Pirate

Jr. Member
Jun 26, 2013
38
6
Hampton, VA
Detector(s) used
Garrett AT Pro, Garrett Pro Pointer
Primary Interest:
Metal Detecting
If I'm finding coins from dry sand to waist deep water, I'm not disappointed!
Found my first Merc yesterday...in the surf....big let down....lol
 

Diver_Down

Silver Member
Dec 13, 2008
4,373
2,000
St. Augustine, FL
Also do you have Iron Audio off?

Sand Pirate, I presume the last two questions are directed at me. If so, yes I run it in Pro. With Iron Audio off, Iron rings loud and clear as coins. With Iron Audio on, I can at least distinguish the audio and dig the targets I choose. Regardless of Iron Audion on/off, the notch discrimination is set to eliminate iron.
 

lookindown

Gold Member
Mar 11, 2010
7,089
4,936
Florida
🏆 Honorable Mentions:
1
Detector(s) used
ACE 250,AT PRO, CZ21...RTG pro scoop...Stealth 720
Primary Interest:
All Treasure Hunting
Sand Pirate, I presume the last two questions are directed at me. If so, yes I run it in Pro. With Iron Audio off, Iron rings loud and clear as coins. With Iron Audio on, I can at least distinguish the audio and dig the targets I choose. Regardless of Iron Audion on/off, the notch discrimination is set to eliminate iron.
Are you talking big iron, little iron or all iron...a nail shouldn't give you a high tone.
 

Sand Pirate

Jr. Member
Jun 26, 2013
38
6
Hampton, VA
Detector(s) used
Garrett AT Pro, Garrett Pro Pointer
Primary Interest:
Metal Detecting
Well I kinda had the same problem today, and I made an observation that probably means nothing but when I'm running fresh batteries I don't seem to have that problem. Yesterday and today my batts were at half power...now I'm not saying that's the culprit, only an observation. And also I was hunting in the same slot as yesterday...iron rich. I was running pro all mode with disc at 40, iron audio off and I was getting high pings on iron...in fact an old rusty bolt about blew my ear off....
She was very chatty today....I'm going to a different location over the weekend. It may just be the area...who knows...
 

lookindown

Gold Member
Mar 11, 2010
7,089
4,936
Florida
🏆 Honorable Mentions:
1
Detector(s) used
ACE 250,AT PRO, CZ21...RTG pro scoop...Stealth 720
Primary Interest:
All Treasure Hunting
Well I kinda had the same problem today, and I made an observation that probably means nothing but when I'm running fresh batteries I don't seem to have that problem. Yesterday and today my batts were at half power...now I'm not saying that's the culprit, only an observation. And also I was hunting in the same slot as yesterday...iron rich. I was running pro all mode with disc at 40, iron audio off and I was getting high pings on iron...in fact an old rusty bolt about blew my ear off....
She was very chatty today....I'm going to a different location over the weekend. It may just be the area...who knows...
You might be on to something...I use rechargeable batts, so Im fully charged every time I hunt...I almost never get down to half power.
 

Diver_Down

Silver Member
Dec 13, 2008
4,373
2,000
St. Augustine, FL
Are you talking big iron, little iron or all iron...a nail shouldn't give you a high tone.

It doesn't matter the size. The usual culprit is old residual dredge pipe slag. It is literally flecks of iron the size of a fingernail. At this point, I might as well swing my Sea Hunter MarkII. At least, I know that I'm not sacrificing depth.

Also, I don't believe it is the batteries. It happens with fresh batteries.
 

Last edited:

Sand Pirate

Jr. Member
Jun 26, 2013
38
6
Hampton, VA
Detector(s) used
Garrett AT Pro, Garrett Pro Pointer
Primary Interest:
Metal Detecting
Yep I get the teeny pieces too...rings like a church bell...
I have faith that we will figure this out though....I'm still learning the machine and only have about 50 hours or so on it.
 

lookindown

Gold Member
Mar 11, 2010
7,089
4,936
Florida
🏆 Honorable Mentions:
1
Detector(s) used
ACE 250,AT PRO, CZ21...RTG pro scoop...Stealth 720
Primary Interest:
All Treasure Hunting
It doesn't matter the size. The usual culprit is old residual dredge pipe slag. It is literally flecks of iron the size of a fingernail. At this point, I might as well swing my Sea Hunter MarkII. At least, I know that I'm not sacrificing depth.

Also, I don't believe it is the batteries. It happens with fresh batteries.
Iron like that shouldn't give a high tone...I cant figure that out...do you get a low tone on anything?
 

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