Hi Doug,

Thanks for the reply and information on the Bison unit.  I was aware of the
type of device it was, but not it's method of operation.  Thanks for that
info.  I put it on ebay in hopes some exploration company may be interested
in it.  Maybe someone in PSN also.

Raul

Doug Crice wrote:

> The Bison 1580 is an exploration seismograph, not an earthquake
> seismograph.  It's generally used with a sledgehammer energy source to
> do shallow refraction surveys like depth-to-bedrock and such.  It's a
> member of the class called "signal enhancement" seismographs because it
> can store the data from a hammer impact in a digital memory, and then
> add the signals from subsequent hammer blows to give you more range
> without resorting to explosives. It wasn't ever a commercial success
> because of logistic considerations related to the number of channels. It
> doesn't contain much in the way of components useful for earthquake
> recording but would be useful for checking out your foundation if it
> works.  The schematics were never public knowledge and Bison went
> bankrupt just last year.  There is a group in Minnapolis alegedly
> provding service.
>
> "Raul J. Alvarez" wrote:
> >
> > Hi All,
> >
> > Seismo amp on ebay.  Check it out if interested.
> > http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=200548268
> >
> --
> Doug Crice          web site http://www.georadar.com
> GeoRadar Inc.             e-mail dcrice@............
> 19623 Via Escuela Drive           phone 408-867-3792
> Saratoga, CA 95070 USA              fax 408-867-4900
>
> _____________________________________________________________________
>
> Public Seismic Network Mailing List (PSN-L)
>
> To leave this list email listserver@.............. with the body of the
> message: leave PSN-L


Hi Doug,
Thanks for the reply and information on the Bison unit.  I was
aware of the type of device it was, but not it's method of operation. 
Thanks for that info.  I put it on ebay in hopes some exploration
company may be interested in it.  Maybe someone in PSN also.
Raul
Doug Crice wrote:
The Bison 1580 is an exploration seismograph, not
an earthquake

seismograph.  It's generally used with a sledgehammer energy source
to

do shallow refraction surveys like depth-to-bedrock and such. 
It's a

member of the class called "signal enhancement" seismographs because
it

can store the data from a hammer impact in a digital memory, and then

add the signals from subsequent hammer blows to give you more range

without resorting to explosives. It wasn't ever a commercial success

because of logistic considerations related to the number of channels.
It

doesn't contain much in the way of components useful for earthquake

recording but would be useful for checking out your foundation if it

works.  The schematics were never public knowledge and Bison went

bankrupt just last year.  There is a group in Minnapolis alegedly

provding service.
"Raul J. Alvarez" wrote:

>

> Hi All,

>

> Seismo amp on ebay.  Check it out if interested.

> http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewI
tem&item=200548268

>

--

Doug Crice          web
site http://www.georadar.com

GeoRadar Inc.            
e-mail dcrice@............

19623 Via Escuela Drive          
phone 408-867-3792

Saratoga, CA 95070 USA             
fax 408-867-4900
_____________________________________________________________________
Public Seismic Network Mailing List (PSN-L)
To leave this list email listserver@.............. with the body of
the

message: leave PSN-L