PSN-L Email List Message

Subject: T Max Sensor
From: "Frank Cooper" fxc@.......
Date: Fri, 8 Nov 2002 16:14:05 -0600

Hello PSN,
This is an invitation to visit my web site  at
to see the pictorial construction details of John Cole's new T Max Detector.
I have read a great deal of discussion over the years on PSN about a proper
and inexpensive base.  I think John may have solved both problems with a
cheap (but not cheaply made) base for amateur seismologists.  Also his
method of using ball bearings at the pivot point and suspension point are
outstanding. (John pioneered the ball bearing method). Feedback is welcome.
No doubt there are some details I should have included such as ---everthing
near the magnet must be non-magnetic.

And let me express my great thanks to Larry Cochrane for paying for and
maintaining "" and for sponsoring PSN over the years, his
authorship of Winquake, SDR, his web site "Redwood City Public Seismic
Network" at, for making available his A/D, amp, other
boards, hardware and other software, and his many other great contributions
to amateur seismology.  Without those contributions there would be far fewer
of us and the few of us would still be floundering around with our smoked
drums and chart recorders.  A great big thanks Larry!

Best wishes and regards to all,

Frank Cooper, Friendswood, Texas, USA


Public Seismic Network Mailing List (PSN-L)

[ Top ] [ Back ] [ Home Page ]