PSN-L Email List Message

Subject: 1HZ Geophones
From: "Larry Cochrane" cochrane@..............
Date: Tue, 14 Aug 2001 19:26:13 -0700


William Ott from the Weston Observatory in Weston MA contacted me the other
day in regards to trading some of my equipment (A/D, Amp boards and GPS
system) for some of their unused geophones. Below are links to pictures of
the sensors as well as manuals in pdf format. I told William, who is on the
PSN-L list, that I could trade two systems for the HS-10-1b and HS-10-1 now
and that I would send out an email message to the list to see if anyone is
interested in the remaining 6 vertical sensors. He would like to have four
systems from me and he has 12 sensors available.

The cost will be $180.00 + shipping for each of the vertical sensors. I will
need to sell three sensors to be able to supply a complete system to

If interested please mail me and William.


-Larry Cochrane
Redwood City, PSN

----- Original Message -----
From: "William Ott" 
To: "Larry Cochrane" 
Sent: Tuesday, August 07, 2001 11:38 AM
Subject: Re: seismometers

> Larry,
> I have finally gotten out some of our surplus 1 Hz seismometers and tested
> to make certain that they work.
> I think I could use as many as four sets of your boards, each with a
> amplifier/filter board (3 channel) plus power supply, a PSN-ADC-16 analog
> digital card, and a GPS timing system interface board with antenna and
> supply.
> I would be interested in trading you the following sets of seismometers
(one set
> of seismometer for a set of boards):
> 1. A set of HS-10-1 instruments (2 horizontal and 1 vertical) with
> coils. See picture
> 2. A set of HS-10-1B instruments (2 horizontal and 1 vertical) with
> coils and calibration coils.  See picture
> 3. A set of three vertical EV-17 instruments with 5,000-ohm coils and
> calibration coils. See picture
> 4. A set of three vertical HS-10-1/A instruments with 50,000-ohm main
> calibration coils and pressure cases.  (The pressure cases are somewhat
> but can be cleaned up) See picture
> I have also scanned information on these seismometers into PDF format that
> might find useful.
> If you are interested in trading for these instruments let me know.
> William Ott
> Weston Observatory
> Boston college
> ottwi@......


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Larry Cochrane <cochrane@..............>