Bravo Bryan Goss,

Yes, Compliment to everyone involved.

The picture you show is what I try to get
but rarely see.

Right now a storm is coming through and
the weather related micro seismic waves
have been setting off alarms.
I would have to filter heavily at 2 seconds
to get equivalent to your flatness in the noise.

I wonder if you might use a flexible wire fulcrum somehow
where the bearing is located, Then corrosion
or dust will be no problem.
I bet the force at the bearing is considerable
and the metals should be identical in alloy.
But not certain there.

Is the bearing welded or glued to its holder (not meaning the surface) ?

Regards,
geoff


-----Original Message----- 
From: Bryan Goss
Sent: Sunday, November 21, 2010 10:00 PM
To: psnlist@..............
Subject: RE: http://www.1goss.com/Arkansas42.jpg



Thanks Geoffrey,

Ill take that as a compliment, The Lehman Seismograph was built by me, however 99.9% of it was Larry Cochrane or Webtronics 
equipment that he offers from his site  http://psn.quake.net/
That is where I found a ton of info on how to build the basic sensor. With a lot of questons to the psnlist group to make it better. 
Here are a few links to pictures of the setup.
also part of the reason that looked good, I think was because it was a good quality event and that makes a difference and their was 
little noise here at the time.


http://www.1goss.com/s-bearing.jpg
http://www.1goss.com/s-top.jpg
http://www.1goss.com/s-overall.jpg
http://www.1goss.com/s-boom.jpg
http://www.1goss.com/s-housing.jpg

Thanks Bryan Goss 

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