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White's Surfmaster PI Dual Field Metal Detector - Kellyco

7 Review(s) ... The White's Surfmaster PI Dual Field metal detector is the result of over fifteen years of research and development ... salty sand and water as well as highly mineralized ground with exceptional results and very little resistance.

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Metal Detectors - Theory and Practice - VLF, PI and BFO Schematics

VLF or Very Low Frequency; PI or Pulse Induction; BFO or Beat-frequency ... The coil transmits a pulse toward the ground, generating an answering pulse from...

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Various metal detector circuit diagrams - EDA Board

Magnetometers get some coverage, IB is barely mentioned, and PI not at all. .... This VLF induction balance metal detector has a ground balance mode, .... Forum (/messageb...s.cgi/mb122618)

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Metal Detector using a 2 Pulse Induction Coil - [email protected]

available schematic for a Pulse Induction (PI) metal detector. The background ... of a circular horizontal coil assembly held just above the ground as shown in the.

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Metal Detector/Patents - Geotech

US4128803, (779K), Metal Detector System With Ground Effect Rejection, PNI (the old ... a large array for use with a submersible, includes IB and PI methods.

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How to build a Surf PI 1.2 pulse induction metal detector from a DIY kit.

Jul 13, 2012 ... How to build a Surf PI 1.2 pulse induction metal detector from a DIY kit. .... found it helps with ground balancing…if made with the correct materials. .... surf pi mi se incalyeste u5( 78L05 )si face zgomot, ce am gresit in schema.

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Easy to build pulse induction metal detector with DSP - Lammert Bies

But if we charge for a longer period then say 250µsec, you may over-saturate the ground which makes small objects invisible due to background noise.

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BASIC CIRCUITRY of Metal Detection - Talking Electronics

The output (pin 3) of IC2 is connected to an LED and a metering circuit. ..... As the loop moves up and down above the ground, the oscillator's frequency shifts in...

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How to build Silverdogs Surf Pi 1.2 detector : Other Metal ...

Bought a Silverdog Surf Pi over winter as a project to build and have just ... they miss out things like ground, & power supplies, and just use (in...

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