PSN-L Email List Message

Subject: RE: Changes to my Lehman sensor
From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@.........
Date: Wed, 15 Apr 2009 18:20:21 +0000


Here are pictures of the latest changes to my lehman sensor. One of the
change is that the top now has a hindge to make it more movable. In
theory that should provide me with better frequancy. However. I
continune to get the peak at 0.6Hz, even with thoise changes. The damper
plate is now aluminum, not steel.

I am not sure how well this works until I get a earthquake close to
Iceland or some where in the world.


J=F3n Fr=EDmann


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