The deepest nugget found by a detector that i`ve read about, was a 90 ounce nugget found in W.A. around 15-20 years ago using an SD2000 and was found at a depth of 4 feet.
Now, i was surfing the internet and i stumbled upon a website that shows you how to build a pulse induction machine, and it was mentioned that (the theoretical maximum a detector can scan is 5 TIMES the width of the coil). So a 11 inch coil should be able to detect at 55 inches and that would be on a large target as it did mention that the theoretical minimum target the coil could detect is 5% of the width of the coil.
This person seemed to know what he was talking about, and is most likely an electrical engineer of some kind.
Now, this has got me wondering, are`nt all top end pulse machines the same with the amount of power they use, if so then the new GPX7000 probably dose`nt go any deeper than the SD series of machines, i`m probably simplifying things here, as the problem is probably a lot more complex than this,maybe someone on this forum has an electrical background and could enlighten us a bit more about this?
And going further, in history from what i have read, the largest nuggets ever found were within 2 feet of the surface or they were => 12 feet below the surface, so in vic from what i`ve seen of the diggings, is the majority of all gravel layers are within <= 4 feet of the surface, so deducing from this info, i would say that if there is any large nuggets left to find then they are => 8 feet below the surface - out of reach of any current detectors.
If you look on the internet, you will find detectors made overseas that claim to be able to reach 10 metres in depth, but use 3D imaging which in turn shows an object such as gold in a red color, and also gives an accurate depth reading and they also claim can do accurate discrimination.
If any of you know of deep ground were you believe there is probably large nuggets residing and you are cashed up, why not look into this, the next "Welcome Stranger" could be waiting just for you?
Now, i was surfing the internet and i stumbled upon a website that shows you how to build a pulse induction machine, and it was mentioned that (the theoretical maximum a detector can scan is 5 TIMES the width of the coil). So a 11 inch coil should be able to detect at 55 inches and that would be on a large target as it did mention that the theoretical minimum target the coil could detect is 5% of the width of the coil.
This person seemed to know what he was talking about, and is most likely an electrical engineer of some kind.
Now, this has got me wondering, are`nt all top end pulse machines the same with the amount of power they use, if so then the new GPX7000 probably dose`nt go any deeper than the SD series of machines, i`m probably simplifying things here, as the problem is probably a lot more complex than this,maybe someone on this forum has an electrical background and could enlighten us a bit more about this?
And going further, in history from what i have read, the largest nuggets ever found were within 2 feet of the surface or they were => 12 feet below the surface, so in vic from what i`ve seen of the diggings, is the majority of all gravel layers are within <= 4 feet of the surface, so deducing from this info, i would say that if there is any large nuggets left to find then they are => 8 feet below the surface - out of reach of any current detectors.
If you look on the internet, you will find detectors made overseas that claim to be able to reach 10 metres in depth, but use 3D imaging which in turn shows an object such as gold in a red color, and also gives an accurate depth reading and they also claim can do accurate discrimination.
If any of you know of deep ground were you believe there is probably large nuggets residing and you are cashed up, why not look into this, the next "Welcome Stranger" could be waiting just for you?
