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  #1  
Old 04-08-2021, 04:39 PM
liudengyuand liudengyuand is offline
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Is it really useful？
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  #2  
Old 04-09-2021, 09:04 AM
FrancoItaly FrancoItaly is offline
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Originally Posted by liudengyuand View Post
Is it really useful？
could be.
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  #3  
Old 04-09-2021, 01:24 PM
liudengyuand liudengyuand is offline
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Who knows in what range the inductance of 3 turns is?
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  #4  
Old 04-09-2021, 03:04 PM
FrancoItaly FrancoItaly is offline
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Who knows in what range the inductance of 3 turns is?
I think less than 1 micro Henry.
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  #5  
Old 04-09-2021, 03:13 PM
liudengyuand liudengyuand is offline
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Your document mentions that the tr5 emitter output should reach 5v, but the use of double-sided large-area copper-clad PCBs cannot reach 5v, only about 2v, but it does not affect the sensitivity of electromagnetic field reception. So I think that the output voltage of tr5 has nothing to do with it.
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  #6  
Old 04-09-2021, 03:19 PM
FrancoItaly FrancoItaly is offline
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Originally Posted by liudengyuand View Post
Your document mentions that the tr5 emitter output should reach 5v, but the use of double-sided large-area copper-clad PCBs cannot reach 5v, only about 2v, but it does not affect the sensitivity of electromagnetic field reception. So I think that the output voltage of tr5 has nothing to do with it.
If the tuning has been done correctly, any value in the 2 - 6V range is fine, this value is not critical.
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  #7  
Old 04-10-2021, 02:05 PM
liudengyuand liudengyuand is offline
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It is difficult to detect metals. I wonder if anyone in the world has ever succeeded?
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