Hi Jon,
Now you want to adjust the beam to be horizontal again. And what do you =
have
as the feet for your seismo. They look rubber tipped, I suggest brass or
stainless steel acorn nuts. You don't want the feet to act as a cushion.
Gary




-----Original Message-----
From: psn-l-request@.............. [mailto:psn-l-request@............... =
On
Behalf Of J=F3n Fr=EDmann
Sent: Sunday, May 24, 2009 1:35 PM
To: PSN-Postlist
Subject: Did I get 12 second period ?

Hi all

I did one little change to my lehman seismometer. I did rase the front
of the seismomter up from where it was. This appears to have incresed
it's period to about 12 seconds.

Here is are pictures of what I did.
http://www.jonfr.com/myndir/v/geology/lehman/p5240001.jpg.html

I can send psn file to anyone how wants.

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

http://www.jonfr.com

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