Minelab Manticore Aluminum Bottle Screw Cap Rejection

[Martin_V3i]

These flattened aluminum twist caps totally fool my Minelab Manticore. How do you reject them with the Manticore? Those just seem to test like good copper pennies on the Manticore.

Is there a bottle cap reject for alum bottle screw caps on the Manticore?

 

[Diga]

Bottle cap rejection only applies to ferrous caps.

There's no way to reject aluminum caps on the Manti, or any other detector. Well, one could discriminate them out, but that would also mean almost all good targets would be discriminated out as well

 

[Martin_V3i]

Bottle cap rejection only applies to nonferrous caps.

There's no way to reject aluminum caps on the Manti, or any other detector. Well, one could discriminate them out, but that would also mean almost all good targets would be discriminated out as well.

My trustworthy Whites V3i rejects them. I have a collection of the alum screw caps I found yesterday, and the V3i, running in C

Bottle cap rejection only applies to nonferrous caps.

There's no way to reject aluminum caps on the Manti, or any other detector. Well, one could discriminate them out, but that would also mean almost all good targets would be discriminated out as well.

My old Whites V3i rejects it.

 

[Diga]

Oh crap. I just realized I said non-ferrous caps, instead of ferrous caps. I'll see if I can edit it

 

[jmaclen]

Flattened and non-flattened aluminum screw caps, both the large ones and the shot sized ones sound really good on all of these latest SMF detectors like the Equinox series, Manticore, Legend and Deus 2. Even their detached rings sound great and definitely mimic the target responses of more desirable targets like copper and silver US coins and jewelry and those detached rings can easily mimic a US nickel or similar sized gold ring.

So, if you hate them, if you are on a dig count due to time or health reasons or there are just too many of them, notching out their target IDs is a possibility, but like I said, you will potentially be notching out some very desirable targets that have the same target IDs.

 

[IDXMonster]

IDK how the v3i is rejecting them without rejecting anything copper cent on down. It’s just a target with the same conductivity. And they’re all over that range, a large one can read exactly like a quarter. If they’re smashed you might be able to weed a few out by going 90 and looking for number changes but in old trashy areas that’s dangerous.

 

[tnsharpshooter]

Interesting thread.
Deus 2 users try the following.
This can expose non crushed aluminum tops.
Cross check between programs thst use 14 khz and 40 kHz.
If 40 kHz reads higher by s little - good chance of aluminum screw cap (not flattened or crushed).
I tested this in the wild in a park. And verified by digging.
Crushed or flattened ones- this won’t help though.

Cheers.

 

[Diga]

Interesting thread.
Deus 2 users try the following.
This can expose non crushed aluminum tops.
Cross check between programs thst use 14 khz and 40 kHz.
If 40 kHz reads higher by s little - good chance of aluminum screw cap (not flattened or crushed).
I tested this in the wild in a park. And verified by digging.
Crushed or flattened ones- this won’t help though.

Cheers.

Hi TNS.

With that method, are you saying that the D2 somehow up averages a very specific piece of aluminum, but somehow knows not to up average good targets?

Furthermore, since aluminum of any kind can ID from just above ferrous, right up to silver, that would mean that with your method, the hunter would have to switch from SMF, to 14 khz, then to 40 khz, on every target!

Your method is one in which air tests will suffice, so here's an air test video suggestion for you:

Take various types of uncrushed aluminum caps, along with a few coins and a few pieces of jewelry. Try your method on all those. I'll eat my words if your method works, but to be blunt, I'll give your method about a 0% chance that it will work the way you say it does

 

[jmaclen]

Hi TNS.

With that method, are you saying that the D2 somehow up averages a very specific piece of aluminum, but somehow knows not to up average good targets?

Furthermore, since aluminum of any kind can ID from just above ferrous, right up to silver, that would mean that with your method, the hunter would have to switch from SMF, to 14 khz, then to 40 khz, on every target!

Your method is one in which air tests will suffice, so here's an air test video suggestion for you:

Take various types of uncrushed aluminum caps, along with a few coins and a few pieces of jewelry. Try your method on all those. I'll eat my words if your method works, but to be blunt, I'll give your method about a 0% chance that it will work the way you say it does

I am not saying that tnsharpshooter is right or wrong about what he is suggesting. I haven’t tried it. I use a different method.

However, your ignorance of Deus 2’s basic functioning is obvious by part of your post.

 

[Diga]

I am not saying that tnsharpshooter is right or wrong about what he is suggesting. I haven’t tried it. I use a different method.

However, your ignorance of Deus 2’s basic functioning is obvious by part of your post.

Oh let me guess...you're probably going to go on about how it's not SF, but rather different weights of FMF? If so, then so what? That's just a meaningless nuance that does not negate my point, that changing from one FMF to another FMF, or FMF to SF, is not going to do what TNS says it does, and change the dig / no dig decision in that regard.

 

[jmaclen]

It's still obvious.

I am going to try and stick to the Manticore and see if there is a way to help Martin_V3i.

You can wonder and argue about what Deus 2 can and can't do without me.

 

[itsaring!]

Oh let me guess...you're probably going to go on about how it's not SF, but rather different weights of FMF? So what? That's just a meaningless nuance that does not negate my point, that changing from one FMF to another FMF, or FMF to SF, is not going to do what TNS says it does, and change the dig / no dig decision.

Deus ll beach digging you just ignore the common number for those fresh ones. Deus ll isn't good at skipping a lot of buried Corona caps either. If i'm hunting for gold I sometimes have to skip fresh zinc cent numbers. Yet you'll get a bag of zinc cents well below a zinc cent number. Now if they make a detector that blocks out all zinc cents i'll buy 5 of them. FWIW the Manticore figures out iron bottle caps a little better IMO. Aluminum ones just sound too good. Keep in mind we aren't just talking about just one aluminum cap maker either. May be off an aluminum twist top can or glass bottle. But the best way to avoid caps is just don't dig those numbers. One thing I have learned is if you are not wanting to dig junk it's easier to stay home and watch youtube and look at their dug junk.

 

[Diga]

IDK how the v3i is rejecting them without rejecting anything copper cent on down. It’s just a target with the same conductivity. And they’re all over that range, a large one can read exactly like a quarter.

I don't park dirt hunt for gold jewelry in the foil / tab range anymore. When I want gold, I go in the water. Although I still dirt hunt for high conductors only, which still allows detection of most large gold rings and silver rings. YET, even when trying to avoid aluminum, it still finds a way to sneak in with those damn screw caps! lol. They ID as high conductors, and sound exactly like coins, regardless of using square tones or pitch tones.

If someone figured out a way to avoid those caps for the high conductor cherry picker, then it would be headline news in the metal detecting community. Too bad that headline doesn't exist.

 

[IDXMonster]

I don't park dirt hunt for gold jewelry in the foil / tab range anymore. When I want gold, I go in the water. Although I still dirt hunt for high conductors only, which still allows detection of most large gold rings and silver rings. YET, even when trying to avoid aluminum, it still finds a way to sneak in with those damn screw caps! lol. They ID as high conductors, and sound exactly like coins, regardless of using square tones or pitch tones.

If someone figured out a way to avoid those caps for the high conductor cherry picker, then it would be headline news in the metal detecting community. Too bad that headline doesn't exist.

Exactly!

 

[tnsharpshooter]

You use multi freq - one with 40 kHz max and one with 14 kHz max. Simple toggle and check. Now remember if cap is smashed won’t work. Aluminum twist caps is what I am talking about. Expect use of 40 kHz max program to ID a point or 2 higher vs 14 kHz max program. I have seen this multiple times in wild. Dug and verified.

One thing I never did check. Which channel either(both) program was running in.
I saw this on 2 outings in same park.
May have showed in video - can’t remember.

 

[Diga]

TNS,

1 or 2 points higher? That's kind of splitting hairs and a little precarious, don't you think?

Are you saying that the 40khz max program, will very slightly raise the ID on the non crushed bottle caps, but no very slight raise occurs when doing so on various coins and jewelry?

 

[tnsharpshooter]

I just posted video showing. If anyone wants to watch.

If you don’t use then keep digging all those aluminum twist caps.
All I will say.

 

[Diga]

I just posted video showing. If anyone wants to watch.

If you don’t use then keep digging all those aluminum twist caps.
All I will say.

I'll check out the video later. I checked out your channel earlier today, but I didn't see anything about it. I did watch your "4 year" video though. Totally agree on all that, but said chaos isn't just in the U.S. It's global.

BTW- It's not that I'm so much doubting your method being able to help in avoiding those caps. Rather, my concern would be the good targets that are ignored by using the method.

 

[tnsharpshooter]

There is always a risk.
So one can dig all if they want.
I know what I am going to do.
Remember and I think I am correct in saying this.
Deus 2 using 14 kHz max freq. Deus 2 has the lowest (frequency) MF capability overall out there.

 

[Martin_V3i]

I just posted video showing. If anyone wants to watch.

If you don’t use then keep digging all those aluminum twist caps.
All I will say.

link