Advice and tips Of detection
Hi my friends
I bring you good news here on my long experience of research for the detection of metal
For interested manufacturing PD's or the PDK's or the LRL's
Frequencies research for metals in air is between 7 kHz and 12 kHz
Frequencies research for buried metals is between 48kHz and 115 kHz
Other advice and tip. Use normal coils or spiral without core or ferrite, because with ferrite; the magnetic fields are not wide so no good result with the distance of detection and sensitivity.
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God bless all - Nicolas
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