Dave,

That looks very similar to what I have - probably a slightly newer or
older model.

Thanks for the tip!

=20

Jack

=20

________________________________

From: psn-l-request@.............. [mailto:psn-l-request@...............
On Behalf Of Dave Nelson
Sent: Saturday, May 02, 2009 11:26 PM
To: psn-l@..............
Subject: Re: Guralp seismo

=20

Greetings Jack,
             When I visited the USGS.NEIC HQ in Golden, Colorado in
2006,
 John McMillan whas the lab tech that showed us lots of wonderful gear
amongst that were the Gulrap Horiz and Vert  seismo's=20
www.sydneystormcity.com/Guralp_CMG-V30_horiz_seismom1.JPG

www.sydneystormcity.com/Guralp_CMG-V30_vert_seismom1.JPG

maybe the same as you have acquired  :)    I dont know if John is still
there
but a phone call to there may get you some data sheets anyway

see how you go
Dave Nelson
Sydney


At 10:23 PM 5/2/2009 -0400, you wrote:



Folks,
I've come into possession of a late 80's vintage Guralp vertical force
feedback seismo.
Unfortunately, it has no model information.  It has a 3"x9"
(waterproof-ish but not borehole-
ready) cylindrical sensor with very nice brass workings inside.  There
is also an amplifier
package in an aluminum cylinder.  It appears to use capacitive position
sensing, a force=20
feedback coil, and a triangular leaf spring to give about a 2-Hz
mechanical period.  It=20
has remote centering with a gearmotor, and a manual mass clamp for
shipping.  The
sensor has a cable coming out the bottom with a 10-pin MS connector on
the end, and
three pointed feet.  The sensor part looks pretty straightforward, and
I'm tracing the amp=20
circuit (this will take a while).
This unit doesn't appear to be on Guralp's website. =20

Anyone have any idea what I have here?  I can take some pictures if
it'll help.  Anyone
gotten obsolete information out of Guralp before?
Thanks,
Jack


















Dave,

That looks very similar to what I =
have –
probably a slightly newer or older model.

Thanks for the =
tip!

 

Jack

 









From:
psn-l-request@.............. [mailto:psn-l-request@............... =
On Behalf Of Dave Nelson

Sent: Saturday, May 02, =
2009 11:26
PM

To: =
psn-l@..............

Subject: Re: Guralp =
seismo



 

Greetings Jack,

             =
When I
visited the USGS.NEIC HQ in Golden, Colorado
in 2006,

 John McMillan whas the lab tech that showed us lots of wonderful =
gear

amongst that were the Gulrap Horiz and Vert  seismo's 

www.sydneystormcity.com/Guralp_CMG-V30_horiz_seismom1.JP=
G



www.sydneystormcity.com/Guralp_CMG-V30_vert_seismom1.JPG=




maybe the same as you have acquired  :)    I dont =
know if
John is still there

but a phone call to there may get you some data sheets anyway



see how you go

Dave Nelson

Sydney





At 10:23 PM 5/2/2009 -0400, you wrote:





Folks,

I've come into possession of a late 80's vintage Guralp vertical force =
feedback
seismo.

Unfortunately, it has no model information.  It has a =
3"x9"
(waterproof-ish but not borehole-

ready) cylindrical sensor with very nice brass workings inside.  =
There is
also an amplifier

package in an aluminum cylinder.  It appears to use capacitive =
position
sensing, a force 

feedback coil, and a triangular leaf spring to give about a 2-Hz =
mechanical
period.  It 

has remote centering with a gearmotor, and a manual mass clamp for
shipping.  The

sensor has a cable coming out the bottom with a 10-pin MS connector on =
the end,
and

three pointed feet.  The sensor part looks pretty straightforward, =
and I'm
tracing the amp 

circuit (this will take a while).

This unit doesn't appear to be on Guralp's website.  



Anyone have any idea what I have here?  I can =
take some
pictures if it'll help.  Anyone

gotten obsolete information out of Guralp before?

Thanks,

Jack