PSN-L Email List Message

Subject: Re: seis on ebay
From: Doug Crice dcrice@............
Date: Fri, 08 Sep 2000 11:52:46 -0700


ebay is an internet business with an on-line auction of many different
items.  Usually over 2,000,000 items are for sale at any one time, so
occasionally seismometers and geophones will become available.  The web
site is http://www.ebay.com/ where you can read all about it.

It's a good place to buy and sell electronic test equipment for your
laboratory.

mariotti mauro wrote:
> 
> Excuse me gang...!
> 
> What's Ebay?
> It's a web site where find seismometers or others interesting things???
> 
> Mauro Mariotti
> 
> At 10.57 06/09/2000 -0700, you wrote:
> >The Ranger Seismometer is a seismometer.  If memory serves, the natural
> >frequency is about 1 Hz, but it might have been adjustable over a small
> >range.  It can be used as either a vertical or horizontal seismometer.
> >The big knob is used to adjust the support spring to center the mass in
> >either position, and the feet are designed to support it in either
> >position.  The little window is used to see when the mass is centered.
> >The mass can be clamped for easy transit.  As I recall, it has a
> >calibration coil.
> >
> >It was named after the original "Ranger" moon study program, which
> >carried three of these in an orthogonal configuration (less the aluminum
> >case) to the surface of the moon for seismic studies. Once landed on the
> >moon, little motors centered the units.
> >
> >Assuming it still works, this unit would be an excellent, short-period
> >seismometer for your seismic station.
> >
> >Doug
> >
> >BOB BARNS wrote:
> >>
> >> Hi,
> >>   Ebay # 430096282 (ends 9/12) is a "Kinemetrics Ranger Seismometer".
> >> It looks interesting but I don't know what it is.
> >> Perhaps someone in the group can post some info about it.
> >> Bob Barns
> >>
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-- 
Doug Crice			 http://www.georadar.com
19623 Via Escuela Drive		      phone 408-867-3792
Saratoga, California  95070  USA	fax 408-867-4900
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Larry Cochrane <cochrane@..............>