PSN-L Email List Message
Subject: Re: Lehman sensor contruction
From: Richard Gagnon richg_1998@.........
Date: Fri, 23 Sep 2005 07:23:52 -0700 (PDT)
All I have read say the Lehman is pretty good. Do a search of all the messages
in this group and you will find loads of information. Also do searches on the
Net for Lehman, sensor, seismograph, combinations of these words for a start.
Make yourself confortable because there is plenty of reading available.
--- triplederby100-propos@......... wrote:
> I am new to seismographs and am planning to build one
> with Lehman sensor. I have found a PDF document on PSN
> website that talks about constructing Lehman sensor.
> Can anyone comment on this document and if it is a
> good place to start building one with? I will also
> welcome any other advise on how to build a Lehman
> Triangle was an improvement over square wheel -
> it eliminated one bump per revolution.
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