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Question:
Phase Wrap: What do YOU call it?
Iron Wrap - 0 (0%)
Iron Wrap Around - 0 (0%)
Iron Wrap Around Effect - 0 (0%)
Phase Wrap - 0 (0%)
Phase Wrapping - 0 (0%)
Phase Wrap Around - 0 (0%)
Phase Wrap Around Effect - 0 (0%)
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Offline Homefire
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« Reply #10 on: April 30, 2012, 01:05:25 pm »
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Phase Jitter can cause the machine to float in the Hysteresis area.   Undecided portion of detection.

If the Machine is Analog, you will be able to figure out what it's saying.    The Last Act of Demodulation is between the Ears.

Digital Run Detectors, that decision is tried to be done by a Computer using only the Information it was told to use.

That may or may not be right.

If the Information is between the Lines, it will just bounce between the Two.

I think someone is trying to ecsplain this using a homemade term.

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Offline Eddy CurrentTopic starter
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« Reply #11 on: April 30, 2012, 01:14:52 pm »
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thanx for your detailed reply, homefire Cool

Quote:Posted by homefire
I think someone is trying to ecsplain this using a homemade term.

yes, my point exactly, and I'm wondering by
which homemade terms people may call it...

HH Eddy


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Offline GoldDigger1950
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« Reply #12 on: April 30, 2012, 01:19:56 pm »
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The rust from an iron target isn't normlaly enough to cause an issue but what you are seeing is a very strong return from a large iron object that causes your receiver to be swamped by the internal magnetic alignment inside the iron target. In a ferrous target, the magnetic flux lines are developed inside of the iron object setting up a N-S field which collapses and is fed back to the receiver. That collapsing field is sensed by the receiver coil and then amplified in a very high gain circuit. If too large a signal comes back, it will overdrive that first stage causing what is referred to as swamping. Basically, it's like throwing a bucket of water at a shot glass just to have a drink.

Now, if the iron object has seriously degraded and is flaking apart into the surrounding soil, then you have a different effect. Many small magnetic flux alignments in many small iron items can cause eddy currents of magnetic flux which are very unstable. It makes a warble to the receiver and the result can cause some strange audio signals depending on how your detector generates its tones.

There are some patents you can search for and read that will help to explain this. Go to the US Patent and Trademark site and search for metal detector patents. There will be hundreds but a lot of them "borrow" from each other.

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« Reply #13 on: May 02, 2012, 11:49:09 am »
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Thank you for your detailed reply GD  Cool
very much appreciated...

-Eddy C.





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