Quote:
Originally Posted by Esteban
First time I use 300 Khz with other coil, no tune capacitor used here, but frequency was 300 Khz. At this frequency I found cigarette paper and other junk. But at 59.5 Khz don't occurs this, and can't asure that this is the gold frequency, but at this frequency other "bad" metals are rejected. Maybe because at 300 Khz more great variation of frequency is noticeable, but at 59.5 Khz the variation is low at presence of these "bad" metals, so detection doesn't occurs.
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Hello Esteban
its possible adapt to Pistoldetectors some variable knob to change for diferent frequencies ???,i mean something who change the freq. from ferrite.