Hi,

I have had an interest in setting up a seismograph for some time.  That=20
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.

I contacted Geotech (who is now free of the Teledyne connection) for a=20
manual.  After some searching effort they provided me with a manual.  They=
=20
indicated the unit is obsolete and this may be the last manual they=20
have.  Geotech was kind enough to give me permission to post my scan of the=
=20
manual to the internet for public access.

Larry Cochrane agreed to post my file to the Redwood City Public Seismic=20
Network web page at



For download.

The manual includes a lot of advice on setting the unit up and detailed=20
schematics of the mechanical structure and electronics.  Even if you do not=
=20
have one of these you may find it instructive on the operation, design and=
=20
construction of the unit.

I have a nice high speed commercial scanner and I can scan other such=20
documents for public use by the group.  We will need to obtain permissions=
=20
to avoid putting Larry in an uncomfortable (or worse) position.

Enjoy,

Frank


Frank Gentges K=D8BRA

LF web site at 

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