Minelab Excalibur 1000 Depth?

[Awire1114]

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[cudamark]

Welcome to Tnet! As far as your question.......I find air tests on a Minelab to virtually worthless. They do much better in actual use.

 

[Awire1114]

Thanks for the feedback. But with my Excal 1000 that I just got, I get about 8" on a quarter for an air test. Is this about normal?

 

[Treasure_Hunter]

Thanks for the feedback. But with my Excal 1000 that I just got, I get about 8" on a quarter for an air test. Is this about normal?

As Cuda said air tests mean nothing.

Need more information about your test. Depth depends on your settings, even in air tests. Are you using auto or manual sensitivity? If manual, what setting? Are you in pinpoint/all metal or descrimination mode? Is your threshold set to max volume or is it like a tiny misquito in your ear? Is your volume set at max? all of these will affect performance in air tests and actual performance in the ground.

 

[Awire1114]

My threshold seems to be unstable a lot of the time even when my sensisitity is low. It's fully charged and my sensitivity is low. Are excalibur's uncapable of being used in the city?

 

[cudamark]

Like all machines, they're affected by EMI (electro-magnetic interference) to some degree. Have you tried several locations to see if it's a machine or site problem? Are you hunting in PP or Disc? On mine, it's much more stable in PP, which is where you should hunt if you want max depth. As long as you're not getting the low battery tone, the amount of charge in the battery will have no effect on stability or any other function of the machine.

 

[Treasure_Hunter]

Like all machines, they're affected by EMI (electro-magnetic interference) to some degree. Have you tried several locations to see if it's a machine or site problem? Are you hunting in PP or Disc? On mine, it's much more stable in PP, which is where you should hunt if you want max depth. As long as you're not getting the low battery tone, the amount of charge in the battery will have no effect on stability or any other function of the machine.

cuda right again, it soulds like your talking about EMI. If your using it near power lines, over head or under ground, also city parks that have lights for baseball, softball, tennis ect can cause it.

 

[SouthFLdigger]

Interesting responses as always, my Excal 2 air tests at 11" on max sens on an Nickel in an EMI "free" area at minimum discrimination. It does about an inch less in my mineral light ground in my test garden. My Safari goes about an 1"-2" deeper on the same Target at 18-20 Sens in air in an EMI "free" setting a bit less depth in my test garden. The problem comes from these auto ground balancing machines. At times depending on nearby RF input to the coil software presets and or EMI, air tests might not be accurate for theoretical max depth. Assuming a fixed non-varying ground balance set point airtest show max theoretical depth. It's simple physics RF Free Space Path loss is least in air vs magnetic inhomogeneity and tangent losses associated with minerals such as ferromagnetic types found in the soil. Soil attenuates RF quite a bit more than air. It never hurts to check air tests for gain. But actual depth in a test garden is best and correlate with others assuming equal or similar soil.

 

[MrMikeJackie]

Even test gardens, unless well established over many years will not provide accurate capabilities of a machine. A silver coin, under ground for 50-100 years can be heard at deeper depths than say a one year test garden or any air test. Air testing and keeping a coin garden will give you a rough estimate of what an average machines capabilities are, while not proving accuracy AT ALL for BBS, FBS, or FB2 machines. And this is assuming a target is by itself with no other ferrous/non ferrous materials around it.