PSN-L Email List Message

Subject: Re: Homade Geophone
From: "Geoff" gmvoeth@...........
Date: Fri, 5 Aug 2005 18:45:50 -0700

One thing you left out is the overall electrical gain you intend you use for your design Like I use a DC gain of about 100DB but if 
you are only looking at 1 Hz the realistic gain is about 89 to 90 DBV of gain.
But I am using a commercially built vertical geophone at the moment and not the one that interests me. I am interested in the 
overall electrical gain you must give your amplifier/filter to show seismic noise on your recorder. I have found that to be the best 
level to use.


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