MY QUATTRO LOVES ALUMINUM

[Steveba]

HI ALL, FIRST , LET ME SAY THAT THIS FORUM IS THE BEST, A WEALTH OF INFO THAT YOU CAN FIND ON THE QUATTRO. MY PROBLEM IS THAT NO MATTER WHAT MODE I USE, MY QUATTRO GIVES A HIGH READING IN THE 28 TO 37 AREA, WHICH SHOULD BE COPPER OR SILVER, BUT WHEN I DIG IT, IT'S ANYTHING FROM AN ALUMINUM PULL-TAB TO A PIECE OF HOUSE SIDING.SMALL OR LARGE IN SIZE , IT DOESEN'T MATTER. I USE THE STANDARD 10" COIL AND WHEN I FIND A COIN OF COPPER OR SILVER IT IS STILL IN THIS SAME RANGE OF NUMBERS.
CAN ANYONE TELL ME WHAT TO LISTEN TO OR HOW I CAN TELL THE DIFFERENCE BETWEEN A GOOD (COPPER,SILVER) AND ALUMINUM READING?

 

[sand_reaper]

Pull tabs should be reading 16 unless they're incomplete or twisted. In which case, they could read anything. Big lumps of alloy (upwards of an inch square or irregular sizes) could read high 20's or low 30's but not ring pulls. Noise cancelling reguarly, particuarly on highly variable mineralized ground keeps the ID numbers fairly stable, but those numbers your giving are way beyond correct use of the noise cancel button.

 

[beachguy777]

I agree with sand reaper here. I've never had a pull tab reading over 30 and usually it's around 16 or 17, I think. Maybe because the aluminum siding is "so big" it throws off the reading, but I think that that would be an exception to "normal detecting" unless for some reason the sites you go to have big sheets of aluminum siding. I'd say, check the noise cancel and stuff and re adjust everything to specs. Good luck.

 

[raptro5618]

I get the same thing but not so much pull tabs but aluminum siding or bigger hunks of aluminum will go up as high as 36 or 37. Usually it is kind of erratic and bouncing all over the place. One other sign I noticed today is that when it says it is shallow and I am down 6 inches and found nothing it always is junk.

Solid 38 or 39 are always a coin it seems.

 

[Golden]

I once detected an aeroplane crash site, and as you can magine, heaps of melted aluminium lying around the ground. The aluminium read a constant 33 or 34 on the Quattro screen. But when I found the machine gun bullets and cartriage, and clear, definite 38. I'm not too sure of the metallic make-up of the bullets, but I would say that, from my experience, if your after a specific target, and you're in aluminium "ground", don't think that the good targets you're after won't shine through. The key here is persistance, even if you're likely to chuck it in. As for coppercoins, genereally they read 38 definite brass around the 19-24 mark, on the Quattro. But I've also had brass coins read in at -5. To say a particular metal will always read a certain numerical reading, is quite true. I've picked up many coins in on the negative reading from -4 to +39. Also I don't know if anyone's aware of it, but a lot of our "aluminium" pulltabs contain a percentage of titanium. That's bound to throw the readings out of wack from time to time.
Cheers Golden

 

[Golden]

I once detected an aeroplane crash site, and as you can magine, heaps of melted aluminium lying around the ground. The aluminium read a constant 33 or 34 on the Quattro screen. But when I found the machine gun bullets and cartriage, and clear, definite 38. I'm not too sure of the metallic make-up of the bullets, but I would say that, from my experience, if your after a specific target, and you're in aluminium "ground", don't think that the good targets you're after won't shine through. The key here is persistance, even if you're likely to chuck it in. As for coppercoins, genereally they read 38 definite brass around the 19-24 mark, on the Quattro. But I've also had brass coins read in at -5. To say a particular metal will always read a certain numerical reading, is not quite true. I've picked up many coins in on the negative reading from -4 to +39. Also I don't know if anyone's aware of it, but a lot of our "aluminium" pulltabs contain a percentage of titanium. That's bound to throw the readings out of wack from time to time.
Cheers Golden

 

[beachguy777]

Golden, that's pretty interesting, not only the fact that you detected an old ariplane crash site but the fact that brass could come in as low as -4 or so. Whew. I guess I'll have to try some more test readings on brass. I can't even remember my experience with it, but the crash sit sounds fabulously interesting. Man what an experience to find that stuff and know that somebody's plane crashed there. Did you find any live "amo" on the sit? I would think it would be if it was from an airplane crash site, unless somebody was shooting at it and the bullets went in near where the plane crashed. Wow, what a trip. Tell me more, if you have the time. Sounds very interesting.

 

[Golden]

it was a P-40E Warhawk, which crashed in the 1940's in the mountains of Victoria. It's a fair climb in through the bush to get to it, and most of the parts have been taken away by those who found it way back when. All that is know is the plane was flying very low over the tops of trees when last seen, so seems like an accident or malfunction of some kind caused the crash. I found the site, and detected it, and melted aluminiun lay everywhere. The plane took the top off a very tall gum tree, and you can still see the broken truck above you, standing under it, and the wall of dirt where the plane hit, there's a depression there, and metal had shot off in all directions from there. It's also a steep hill, so a pain detecting up or down hill. But I did find two bullets and a cartridge, and lots of fusalage line, a bit of canvas and hessian fabric, and all sorts of bolts and steel cable. When the plane was found in the '40's, the watch belonging to the pilot (a US captain) was found and returned to the relatives.

 

[beachguy777]

Wow... Golden. Thanks for the great post here. I can see it in my minds eye just by the way you described it. Very exciting and enthralling to say the least. I also feel pretty bad for the people in the plane. Wow what a tragedy, and it sounds like a lot of fire to have the melted aluminum. Thanks again for a very interesting story. Even though it would have been a great find, I'm glad they got the watch back to the relatives. I guess that's small compensation for what they lost, but at least it's a keepsake.