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ace 350 question
- Thread starter bigdawg47
- Start date
A lot of iron-based targets will easily fall into the "iron" range of most detector. Things like an iron nail or bolt or, well, just many hunks of iron junk. But there is more to metal detection than just the conductivity level of the metal alloy. There is also the size and shape and the added benefits of a man-made iron object that can cause a higher conductive response or dynamic, especially with our modern types of motion-based discrimination. Older TR-Disc. models rejected iron much more easily than do motion discriminators.
One example, or actually two that I have and use in my seminars and demonstrations, are some good old-fashioned bottle openers. You might remember the key-hole looking designs we pried the bottle caps off with. They were iron and about the same thickness as a good nail might be. If they are decayed or broken, so as not to be a completed useful loop, then they will be rejected somewhat similar to an iron nail. Actually, a misshapen hunt or iron wire that is not connected end-to-end. These two specimens I use were 'foolers' because they produced a good beep with an average hunting sweep speed, and they were both laying relatively flat in the ground. Most of the time they read well up-scale from the iron range. Due to their odd shape they are also a bit jumpy in the VDI number range, but they don't usually respond as 'Iron' would.
Most of the time, a typical 'Coin Hunter' will pass on these and other radical-reading VDI's and consider them 'junk metal' because, often, that is what they are. Instead, they try to rely on a very good TID/VDI 'lock-On' and recover the more probable coin-type targets. Devoted 'Relic Hunters' know that most of their targets are going to be not round and flat, other than buttons, and they are often a mixed-metal component anyway, and many odd-shaped objects will read in a 'range of numbers' rather then in a tight, coin-like response. Also, iron was used to make many 'relics' or were a component of many relic-type objects. The result is non-stable VDI's a lot of time.
Back to the old iron bottle openers. If I angle then as if to be 'on edge,' then I might get an iron reading out and audio. Other man-made iron objects will also produce some of the higher-than-iron readings and it is simply because the created object has higher conductive properties.
Find a paper clip. A metal, iron-type paperclip, and make sure it sticks to a magnet. Iron. Change it from its folded position to be straight and check it with your detector and note the audio and visual response. Make sure the Disc. level is low enough to beep on iron. Now, bend it around into a 'U' shape and try it again and you'll probably get the same iron-based response. Now bend it around into ALMOST a O (circle) but do NOT let the ends touch, then sweep it past the coil as if it were laying flat on the ground. The result? Iron
Now, get the two ends attached together by hooking them or just pinching them together very tightly to make contact. The same paperclip. The same metal. The same hunk of iron, but ..... it will usually give you a higher-reading response and a good audio beep. Man-altered form of an iron object can cause us fits sometimes, just like the blasted bottle caps that those openers used to pry off.
It just takes a little time and patience and technique to learn to 'classify' bottle caps and a lot of similar problem 'iron-based' junk.
Monte
One example, or actually two that I have and use in my seminars and demonstrations, are some good old-fashioned bottle openers. You might remember the key-hole looking designs we pried the bottle caps off with. They were iron and about the same thickness as a good nail might be. If they are decayed or broken, so as not to be a completed useful loop, then they will be rejected somewhat similar to an iron nail. Actually, a misshapen hunt or iron wire that is not connected end-to-end. These two specimens I use were 'foolers' because they produced a good beep with an average hunting sweep speed, and they were both laying relatively flat in the ground. Most of the time they read well up-scale from the iron range. Due to their odd shape they are also a bit jumpy in the VDI number range, but they don't usually respond as 'Iron' would.
Most of the time, a typical 'Coin Hunter' will pass on these and other radical-reading VDI's and consider them 'junk metal' because, often, that is what they are. Instead, they try to rely on a very good TID/VDI 'lock-On' and recover the more probable coin-type targets. Devoted 'Relic Hunters' know that most of their targets are going to be not round and flat, other than buttons, and they are often a mixed-metal component anyway, and many odd-shaped objects will read in a 'range of numbers' rather then in a tight, coin-like response. Also, iron was used to make many 'relics' or were a component of many relic-type objects. The result is non-stable VDI's a lot of time.
Back to the old iron bottle openers. If I angle then as if to be 'on edge,' then I might get an iron reading out and audio. Other man-made iron objects will also produce some of the higher-than-iron readings and it is simply because the created object has higher conductive properties.
Find a paper clip. A metal, iron-type paperclip, and make sure it sticks to a magnet. Iron. Change it from its folded position to be straight and check it with your detector and note the audio and visual response. Make sure the Disc. level is low enough to beep on iron. Now, bend it around into a 'U' shape and try it again and you'll probably get the same iron-based response. Now bend it around into ALMOST a O (circle) but do NOT let the ends touch, then sweep it past the coil as if it were laying flat on the ground. The result? Iron
Now, get the two ends attached together by hooking them or just pinching them together very tightly to make contact. The same paperclip. The same metal. The same hunk of iron, but ..... it will usually give you a higher-reading response and a good audio beep. Man-altered form of an iron object can cause us fits sometimes, just like the blasted bottle caps that those openers used to pry off.
It just takes a little time and patience and technique to learn to 'classify' bottle caps and a lot of similar problem 'iron-based' junk.
Monte