Hi all

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.

http://www.jonfr.com/myndir/v/geology/lehman/p6110001.jpg.html

Regards.
--=20
J=F3n Fr=EDmann

http://www.jonfr.com

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