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I give up. I was unable to find an accurate schematic. The review article says this can pick up a quarter in 10". This one can detect a drill press in 3". I don't know what is wrong. The components seem good. Let me know if you fix it after buying!
I give up. I was unable to find an accurate schematic. The review article says this can pick up a quarter in 10". This one can detect a drill press in 3". I don't know what is wrong. The components seem good. Let me know if you fix it after buying!