Quote:
Originally Posted by Alex
Yes this is only filtering and amplify the signal up to 20 kHz .Is good for gold
and silver frequency.Of course you need a laptop to see the signal..also you can listen on the phone...Need other device too.
I have to make first this one after I will try and do experience outside..
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Hi alex,
From 0 to 20khz you are going to pick up plenty of signals, natural and not-so-natural
, but i don´t see how you can detect any metal with it , and less discriminate between them.
anyway it could be an interesting experimentto to go around with a laptop and see what happens.If you detect a multi-thousand tons moving and radioactive metallic item, don´t be afraid it´s just a submarine.
Good luck,
Regards,
Fred.