Hello Frank,
We currently have a BB-13 setup and running using Larry C's A-D board,
filters, and WinSDR. It takes a bit of work to get the setup correct, =
and
then to keep the mass centered. The BB-13 is very sensitive to thermal
changes and will drift hundreds of mv. with just a few degrees of
temperature change. Preferred mass centering is +/- 30 mv., and the =
only way
to achieve this is putting the instrument in a thermally stable =
environment.
Another thing to watch out for is not to turn the mass centering screw =
too
far as the spring guide pin will come out of the guide, causing damage =
to
the flexures.
The BB-13 is capable of running in master or slave mode when there are
multiple BB-13's (Z,E,N), but when running a single unit the jumpers =
must be
set for master operation.
To see some recent events recorded using the BB-13 (OCO2Z) checkout =
Larry's
"Recent Events" page and look for the Omniplex OCO2Z sensor ID.
http://www.seismicnet.com/cgi-dos/event.exe
The BB-13 seismograph is in the shadow zone of the 7.0 Halmahera event
yesterday but clearly recorded wave periods from 2 to 28 seconds.

Greg Christenson
NEIC station code OCO
Omniplex Science Museum
http://www.omniplex.org/OCOdata


-----Original Message-----
From: Frank Gentges K=D8BRA [mailto:fgentges@..................
Sent: Monday, May 26, 2003 11:59 AM
To: PSN-L@..............
Subject: Teledyne Geotech BB13 Seismometer


Hi,

I have had an interest in setting up a seismograph for some time.  That =

interest was suddenly fired into full force when I happened upon a =
Teledyne=20
Geotech BB13 broadband sensor on a hamfest swap table several weeks =
ago. I=20
am now working on a seismograph setup in my spare time.

....









Hello Frank,

We currently have a BB-13 setup and running using =
Larry C's A-D board, filters, and WinSDR. It takes a bit of work to get =
the setup correct, and then to keep the mass centered. The BB-13 is =
very sensitive to thermal changes and will drift hundreds of mv. with =
just a few degrees of temperature change. Preferred mass centering is =
+/- 30 mv., and the only way to achieve this is putting the instrument =
in a thermally stable environment.

Another thing to watch out for is not to turn the =
mass centering screw too far as the spring guide pin will come out of =
the guide, causing damage to the flexures.

The BB-13 is capable of running in master or slave =
mode when there are multiple BB-13's (Z,E,N), but when running a single =
unit the jumpers must be set for master operation.

To see some recent events recorded using the BB-13 =
(OCO2Z) checkout Larry's "Recent Events" page and look for =
the Omniplex OCO2Z sensor ID. http://www.seismicnet.com/cgi-dos/event.exe=


The BB-13 seismograph is in the shadow zone of the =
7.0 Halmahera event yesterday but clearly recorded wave periods from 2 =
to 28 seconds.

Greg Christenson

NEIC station code OCO

Omniplex Science Museum

http://www.omniplex.org/OCOdata




-----Original Message-----

From: Frank Gentges K=D8BRA [mailto:fgentges@..............] 

Sent: Monday, May 26, 2003 11:59 AM

To: PSN-L@..............

Subject: Teledyne Geotech BB13 Seismometer




Hi,


I have had an interest in setting up a seismograph =
for some time.  That 

interest was suddenly fired into full force when I =
happened upon a Teledyne 

Geotech BB13 broadband sensor on a hamfest swap =
table several weeks ago. I 

am now working on a seismograph setup in my spare =
time.


...