PSN-L Email List Message
Subject: Minor changes to my lehman seismomter
From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@.........
Date: Thu, 11 Jun 2009 01:02:10 +0000
I did make some final changes to my lehman seismometer. The basic for
this change was to make the arm movement stable, but I found out that
the other setup was unstable when I got 12 second period. The current
setup gives me 12 second period with out issues.
Here are pictures of the changes.
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