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Depth Penalty ?

synthnut

Well-known member
Has anyone noticed any differences in depth by how you have your AT Pro set ? .....In other words , do you notice that you can hit targets deeper in the "ZERO " setting ? ......Do you seem to loose depth when discrimnating ? ..... Do you seem to increase the depth by running wide open with no discrimination ? .....Thanks, Jim
 
Hi Jim,

I use the Pro Custom mode running wide open with no discrimination with iron audio off, This allows iron
a tone of it's own.

I buried a wheat penny at 8" inches, Wanted to compare depth with discrimination and without. Even set discrimination to knock out zinc pennies, Didn't really notice any loss in depth between the two different settings usng the Pro mode...However, By all rights it should have less depth (weaker signal) due to the extra discrimination but I really didn't notice it with the AT Pro.

However, When I compared the STD mode and Pro mode with the buried 8" wheat penny the Pro mode was deeper. The STD mode would not detect the 8" penny, I need to try this test again but I as not thrilled with the STD mode.

HH, Paul (Ca)
 
Hi Paul ,
Thanks for the example ....Depending on the technology used , some machines do NOT suffer from depth loss because of discrimination ......I'm really glad to hear that the AT Pro is one of them ..... I guess it would depend on how much iron is actuall in the ground that I'm hunting in as to whether or not I would give the Iron a tone of it's own, or just discrimintate it out ..... I would rather give it a tone of it's own so that I could better hear GOOD targets next to it better ..... I'm not sure what the reason behind the STD mode is .......??????.......Pro mode is the only mode that I will be using at all ........ Perhaps that's another thread to see who has found a use for STD mode .......Thanks again for your reply ...I appreciate it ...Jim
 
Paul, how is the Pro on modern park trash like screw caps, pull tabs, and beaver tails? It seems that just about every detector I ever owned has had problems with at least one of these junk items. Thanks R.L.
 
Before I bought my AT I have to admit I was kinda hoping the binary signal in STD would be deeper then the proportional one in PRO as I liked the idea of getting a hit on a deep target without the chance of missing a quiet signal, but thinking about it that was probably not going to be possible the way things are.

That said I am glad the at least one mode will give a little extra depth, I wonder if there will be a LTD edition with a boost mode.
 
Mac,
Is there really room for a boost mode on the current AT Pro ? .....Do you find that you are in areas where you can max out your Sensitivity and STILL have room to go without much falsing ? ......Thanks, Jim
 
Well I do have some pasture that is pretty clean but to be frank I have always been suspicious of boost modes and have never bought a machine with it, if there is the same model without.

I am not saying it can't be used at all but that the occasions it would make a difference are few and far between in my opinion.

Lets face it depth is the holy grail for most detectorists but who likes to dig a deep hole for iron and that is the problem any depth gained most often comes at the expense of discrimination.

Who knows, I might spring for a boost version as longs as the AT keeps telling me the difference between good and bad :lol:
 
The manual says that you will still HEAR a good target , but the TID may not be there !!..... Hey, if the right tone is there , I'm digging !!!.... My buddy and I hunted a farm field upstate NY and I can remember asking him if this farmer won the " Cleanest Farmer " of the year award !!...:rofl: .....For a farm field , this was the cleanest field I think I've even detected ......There were probably 8 of us on a 4 acre field , and if we pulled 50 cents in clad between all of us, it was a lot !!..... This guy must of ridden his tractor in his underwear !!.......No debris , no farm parts , no NOTHING !!!.... I ran the Sensitivity of my machine up about as high as it would go and STILL notihing coming out of that ground !!.....
 
I post this info before. I was cherry picking
; Std mode iron disc to 40 still found 28 coins the first time out. i also did not dig any target over 8" (digger was to short). I am lazy LOL. I believe the AT pro when is says there is a dime at that depth. I hope to cure that with a new digging tool and more time to dig. I have use zero mode and like it very much. The wider tones are great. I cant wait to get it in the water.
 
Hello R.L.

The AT Pro is like any top end single high freq detector, In some cases it'll get pick up the smallest bits and pieces of aluminum and relay this as a deep high conductive target and yes some screw caps will fool the user as well.

However, For deep turf high conductive coins you'll learn what to avoid digging with the information the AT is telling you and this also applies with other top end high freq detectors as well.

As you're scanning the coil side to side across the deep coin signal look for numbers coming in the eighties, If you see the ID jump to a lower ID in the thirties, forties or fifties often and back into the high seventies and eighties chances are it's a beaver tail, piece of foil or piece of aluminum....Now, If the signal is a constant high eighties ID and has a continuous sweet high tone with no trace of low conductive tone sneaking in chances are it's a deep high conductive coin.

(Trashy areas) I was doing well in a certain area full of trash and plucked out a wheat penny, This told me the AT Pro has potential to be a go getter as a deep turf machine in trashy areas.

I look forward to using the AT Pro at pounded parks, Sure some of those nasty bits and pieces of aluminum will sneak in and fool the AT Pro but with the information I enclosed above will help the user avoid most of those signals.

Take care,
Paul (Ca)



.
 
I personally have not seen any depth loss on any "notch" machines I have used. I have seen depth loss on the progressive discriminating machines.
 
From my knowledge as it applies to the GTA, GTI, GTP & ACE Series with the application of notching, it goes something like this. The depth of the detector remains the same depending on the sensitivity setting. Removing notches or using all of them in zero discrimination results, again with no loss of depth. When removing notches, you are only losing the audio for that particular notch. A very good system indeed. Much better then rotating a knob on other detectors, where there is indeed an accumulative loss of depth as you continue increasing the discrimination.

I am guessing, that the same system is also being utilized on the AT Pro.
 
Jim, Try running your iron disc up to 40 then turn the iron audio on. This will give you a whole new set of iron grunts. I have yet to do this in the field but it is real sensitive to iron on the outer edges (sides) of the coil. It tells you iron is present a mile away!
 
Thanks for the info guys .....I'm happy that there is no loss in depth while discriminating ......Thanks for sharing ....Jim
 
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