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Originally Posted by WM6
Unsensitive? You even do not understand how electrostatic sensor work.
And dont be funny, MD web forums (geotech too) are full of schematic like yours. What you do is only camouflage very known schematics into funny symbols.
There is no problem to build high sensitivity static (or ionic) sensor, problem is to biuld high directivity sensor. Hic Rhodos - hic salta!
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This looks like maybe a good circuit for detecting charges in the air. I wonder how well it works for locating buried metal at a distance?
Best wishes,
J_P