Question about search coils

[49er12]

Not the control box so much where everything , my question is are not the coils all copper wire wounded. Is the frequencies in the board adapted to the coil, what’s the difference when it cost much more for these coils, more copper wire , is tightly wounded or more of it I mean that’s what a coil is correct, copper wire. Explain what makes a coil go deeper it’s the computer not the coil, thanks

 

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[TheGreenBoy]

The coil forms a tunned circut with the tx and rx part of your machine. Some coils are tunned to the certain type(s) of the machine wery good, while others only "good enough". Two identical coils from the same manufacturer may differ. Som just perform better then others as a concequence.
The picture of the magnetic field generated depends of the size and shape of the coil. The larger coil generates the field that straches further away, but is less dense, when powered with the same energy. Thus larger coils tends to go deeper, but are less sensitive to small objects (good for larger and deeper objects). With a IB machine, there is also difference in the overlapping gap between tx and rx coil. This impacts on the sensitivity for small objects and ability to differantiate two (or more) close targets.
So every sirious manufacturer has its own development and hides its own tricks in coil manufacturing and tends to produce coils for their detector exclusively.

 

[smokeythecat]

And some of the price is nothing more than a reflection of sheer greed. And sometimes hype.

 

[Carl-NC]

49er, the answer to your question could fill a book. In short, cheap detectors with cheaply-made coils can have decent performance because the electronics have gotten better, both at the design level and the component level. To continue pushing performance even higher, you have to start paying much closer attention to the coil, both in its design and its manufacture.

 

[49er12]

Appreciate the information, gee just thinking, coils always gonna be of copper because of the reaction, or other metals possible, titanium’s, platinum, gold etc, just guessing, electronic components important that reacts to a copper tightly wound coil dd or other, ok thanks

 

[SanMan]

49er, the answer to your question could fill a book. In short, cheap detectors with cheaply-made coils can have decent performance because the electronics have gotten better, both at the design level and the component level. To continue pushing performance even higher, you have to start paying much closer attention to the coil, both in its design and its manufacture.

Thank you Carl,......

 

[Carl-NC]

Copper has higher conductivity than anything but silver, and is cheaper. So for now, it's copper. If someone comes up with an alloy that is higher conductance, weighs less, and is cheaper... then I'll jump.