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.

Cheers

Richard



--- triplederby100-propos@......... wrote:

> Hi.
> 
> 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
> sensor.
> 
> Thanks,
> 
> Kaarigar
> ==================
> 
> _______________________________________________________________
> Triangle was an improvement over square wheel - 
> it eliminated one bump per revolution.
>
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