Greg,

There was so much traffic on geophones that I thought you got an answer. =
The
best choice and the best price are those 4.5 Hz triaxial phones that =
Larry
has for sale.  You can pull the sensors out of the case if you want just =
the
elements. See http://www.seismicnet.com/geophone/index.html

If for some reason you want new geophones, see

http://www.geospacelp.com/
http://www.sercel.com/en/Products/Sensors/Geophones.php
http://www.i-o.com/Products/Product_Datasheets/

Used ones are also available from http://www.rtclark.com/

Bottom line, buy Larry's.

Doug Crice          http://www.geostuff.com
Wireless Seismic            http://www.wirelessSeismic.com
12996 Somerset Drive                phone 1-530-274-4445
Grass Valley,  CA  95945  USA    fax 1-530-274-4446
=20

-----Original Message-----
From: psn-l-request@.............. [mailto:psn-l-request@............... =
On
Behalf Of Mike Speed
Sent: Monday, July 18, 2005 11:31 AM
To: PSN Mailing List
Subject: Modified sound card and datalogging and geophones

I installed some larger-capacitance-value coupling
capacitors on my 24-bit sound card so I could resolve
lower frequencies.  What is a good datalogging app to
use with this?

Also, I put out a request for geophones and got one
response and never heard anything back.  I am looking
for geophones - tell me about what you have -
dimensions - frequency, etc., and how much you want
for them.

Thanks,

Greg

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