Aluminum Screw on Bottle Caps with the AT Pro

[Rustynailsandscrews]

Any way to deal with Aluminum screw on bottle caps ? These were once common on quart size beer bottles. I'm in an area full of them. They ring in as a good target. They are ringing in 76 to 79 in the small silver range. I'm running in Pro Zero and tried Pro coin with the same results as I suspect Pro Coin picks up the circular shape of the bottle cap and Id's it as a coin. Is there a subtle signal that I'm missing ? It wouldn't be impossible that I could miss a subtle signal wearing headphones as I do have some hearing loss. I'm hunting a mid 1800's house that could have some potential as it's never been hunted before. Does the Pro give off a burp, fart, or a grunt that I should be looking for or do I just have to dig all the dirt demons that are in disguise without notching 76 to 79 out ?

 

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[rreahard]

I would love to know the same thing..

 

[1942 merc]

Bottle caps and 22 shell casings are a problem for me also . All you can do is dig them . I would stay in pro zero instead of coin mode .

 

[RobRieman]

Aluminum caps are sweet silver tones on all machines. All you can do is clean them out.

 

[jadocs]

They are but on a Deus you will get an iron buzz when you wiggle the coil to the edge of the bottle cap.

 

[TheCaribbeanDigger]

It really is difficult to tell them apart. Like they said earlier, clean them out so that you dont have to deal with them later! I don't know if its me or my machine but coins sound a little softer. Aluminum screw caps sound more bold. Same pitch but softer on coins and bolder on caps. In the end it's quite difficult. I have 2+ years of expirience with my machine. Great machine too!

 

[relic nut]

Even if you can tell the difference, they may be masking a good target so your better off to get rid of them.

HH RN

 

[steveo40]

Caribbean Digger is right I notice the same thing. I still dig them though.

 

[MackDog]

try raising the coil as you go over them and see if the signal breaks up. I do this for the other bottle caps and it seems to work

 

[Rustynailsandscrews]

Bottle caps and 22 shell casings are a problem for me also . All you can do is dig them . I would stay in pro zero instead of coin mode .

I have had my fair share of run in's with .22 caliber shells and they also can sound good !!!!

 

[Rustynailsandscrews]

It really is difficult to tell them apart. Like they said earlier, clean them out so that you dont have to deal with them later! I don't know if its me or my machine but coins sound a little softer. Aluminum screw caps sound more bold. Same pitch but softer on coins and bolder on caps. In the end it's quite difficult. I have 2+ years of expirience with my machine. Great machine too!

Probably too subtle of a difference for me to pick up on due to some of my hearing loss.

 

[Rustynailsandscrews]

Aluminum caps are sweet silver tones on all machines. All you can do is clean them out.

Well I have a lot of cleaning out to do. I found one today a solid 6" down and was convinced that it had to be a coin at that depth. Of course NOT !!!
By the research I have done, these aluminum caps have been around 25 to 30 years. So a very light weight aluminum cap with a plastic liner sank 6" in that time span with no damage or being crushed. So much for Cherry Picking high signals at this spot !!!

 

[Sandman]

It is going to be hard to determine which signal is a screw cap on ATP because if its circuity. Few other detectors can properly disc these out. Only recourse is to dig if you stick with single freq. detectors.

 

[digger460]

Even tho you would probably dig them anyway, coins alway's seem to have a sharp cut off point. Hard to pass up a signal tho!!

 

[cactusman]

With the right headphones and sweep speed I've found that most of these make a subtle "thunk" on the edges when you go over them.