LEHMAN Sketch of ‘Lehman’Seismograph   Lehman Pictures   Construction details including Kelly Knight’s article   Lehman Seismometer-PSN article   another Lehman design worth making   Chris Chapman’s Lehman

VERTICALS Vertical seismometer design   AS1 Seismometer   An Inexpensive Vertical Seismometer developed at Georgia Tech   Dewayne Hill’s homebrew vertical   The STM-8 Leaf Spring Seismometer   Bryant Labs Vertical based on ST-8 using force feeback - recommended ** Vertical Broadband Theory

SG Sensor Shackleford-Gundersen Seismometer   my SG Sensor version

General Bryant Labs...seismometer designs   “Spring Calculator”; a design tool for Vertical Seismometers by Bob McClure

Timing Recommended is the Garmin 18 GPS

DAMPING Seismometer Damping Ratio   Damping your Seismograph   Magnetic Damping method

Software & Hardware DATAQ Sales   DATAQ A-D Converter   AmaSeis software   Bob McClure’s seismometers & seismic programs Winquake       WinSDR

Digitisers A2D converter, ( analog to digital ) and seismic amplifiers manufactured and sold by Larry Cochrane, of Webtronics ( Redwood City, CA, USA.                http://www.seismicnet.com/#Equipment