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Op-amp question

dowser

dowser

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MINELAB 2100, L-Rods
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I have this Signal generator, and was wondering the correct Op-amp to hook to it?, and how?
Is their a cheap dds for sale with an Op-amp included.
I'm trying to increase the Amplitude of a frequency, and Im trying something I Don't understand.
 

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How about this Juntek, hooking into one of those signal generators? Is is possible, would it increase Amplitude?
 

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Need to ask Carl-NC, this question..
 
There is 2 ways to increase energy in a field, Amplitude is one I believe.
And different harmonics or wave change, doesn't increase signal either.
Is a Metal detector signal ever Amplified, by changing the Amplitude of the Frequencies they use?
 

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