Larry,
I would be very interested in acquiring three of the 12-component =
strings --
one vertical and two horizontal.

snip >
> We also own a large number of strings of 12 L-10B vertical phones,=20
> and of 12 horizontal phones, in each case with c. 15 m cable between=20
> each phone, one string per clip.
snip <

Regards,
-Tim-

Timothy Carpenter
5043 Whitlow Ct.
Commerce Twp., Mi 48382
248-363-4529 (voice & fax)
248-766-1629 (cell)
geodynamics@........... (primary)
geodynamics@....... (secondary)
=A0


-----Original Message-----
From: psn-l-request@.............. [mailto:psn-l-request@............... =
On
Behalf Of Larry Cochrane
Sent: Monday, March 21, 2005 5:27 PM
To: psn-l@..............
Subject: Re: Seismic recorders and geophones available - free to a good =
home

Hi Everyone,

I received this email the other day. The geophones are not very useful =
for
earthquake=20
recording since they are 8 hz units. Since Stanford is near by I could =
pick
up and=20
ship some units to people who are interested in having one of the =
records
and/or=20
sensors. I have no idea how big the records are so I have no idea what =
the
shipping=20
costs would be.

Regards,
Larry Cochrane
Redwood City, PSN

Simon Klemperer wrote:
> Gray Jensen (USGS) suggested that you might have an interest, or know=20
> of someone who might have an interest, in  industry geophones.
> Simon Klemperer
>=20
>=20
> Subject: Seismic recorders and geophones available - free to a good =
home
>=20
> Stanford University is disposing of about 180 Seismic Group Recorders=20
> (SGR-III) and associated geophone strings.
>=20
> RECORDERS
> The SGR III is a single-channel, digital seismic recorder with a=20
> theoretical dynamic range of 156 dB. Data are sampled at 500 samples=20
> per second (or at 2 ms intervals) by a 12 bit A/D converter with gain=20
> ranging from 0-90 dB in 6 dB steps, recorded on cartridge tape.=20
> Total available recording time is about 30 minutes, with up to about=20
> 100 programmable windows.  The SGR's have been modified by the USGS=20
> to turn on at preset times instead of using the  standard radio turn=20
> on. Timing is provided by a TXCO with an accuracy of 0.1 ppm (most=20
> SGR clocks drift less than 20 milliseconds during a 24-hour period).=20
> The SGR III recorders were designed by Amoco Production Company,=20
> built by Globe Universal Sciences, Inc., and modified by the USGS.=20
> IRIS-PASSCAL helped maintain the SGR system as a recording facility=20
> available to PASSCAL users through the 1990s, and they were used very=20
> successfully alongside the Refteks in many major controlled source=20
> experiments.
> Not all our recorders work - the facility was last used in 2001, and=20
> the SGRs have been in storage ever since. We have available a=20
> miscellaneous supply of spare boards, manuals, connectors, etc.
> I estimate the cost to get each unit back in the field for a single=20
> experiment would be >$50, and in a recent experiment in the western=20
> USA I found it more cost-effective to pay for air-freight shipping of=20
> Texan recorders from Europe, than to bring the SGR system out of its=20
> current retirement.=20
>=20
> GEOPHONES
> For each SGR III we also own a single string of 6 modified Mark=20
> Products L-10B vertical-component geophones (8 Hz) connected in=20
> series, with c. 1 m cable between each phone.
>=20
> We also own a large number of strings of 12 L-10B vertical phones,=20
> and of 12 horizontal phones, in each case with c. 15 m cable between=20
> each phone, one string per clip.
>=20
>=20
>=20
> I would consider offers to take all or any part of our equipment.=20
> You would need to pay shipping.
> Even if you are not interested, but know of anyone who would want=20
> e.g. single geophones for teaching purposes, please forward this=20
> message.
>=20
>=20
>=20
>=20
>=20
>=20

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Public Seismic Network Mailing List (PSN-L)