i am trying to use a geospace geophone to close set of contacts that 
initiates a radio transmission to a remote reciever.  this thing needs to be 
adjustable in sensitivity or amplification in order for human footsteps to be 
the minimum neccessary to activate the contact closure.  it must be dc in 
order to be used in the backwoods. any help or info would be greatly 
appreciated.

Thanks,
David
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