All, 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 William. If interested please mail me and William. Thanks, -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 them > to make certain that they work. > I think I could use as many as four sets of your boards, each with a seismic > amplifier/filter board (3 channel) plus power supply, a PSN-ADC-16 analog to > digital card, and a GPS timing system interface board with antenna and power > 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 50,000-ohm > coils. See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10A.jpg > 2. A set of HS-10-1B instruments (2 horizontal and 1 vertical) with 50,000-ohm > coils and calibration coils. See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10B.jpg > 3. A set of three vertical EV-17 instruments with 5,000-ohm coils and > calibration coils. See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/EV17.jpg > 4. A set of three vertical HS-10-1/A instruments with 50,000-ohm main coils, > calibration coils and pressure cases. (The pressure cases are somewhat rusty > but can be cleaned up) See picture > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10C.jpg > > I have also scanned information on these seismometers into PDF format that you > might find useful. > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/ev17.pdf > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/hs10.pdf > http://www.bc.edu/bc_org/avp/cas/wesobs/seismometers/HS10_1a.pdf > > > If you are interested in trading for these instruments let me know. > > > William Ott > Weston Observatory > Boston college > ottwi@...... > > > > __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>