PSN-L Email List Message
Subject: Re: Seismograph for school
From: John or Jan Lahr JohnJan@........
Date: Tue, 26 Sep 2006 21:56:42 -0700
Larry Cochrane has given me permission to post his seismic
amplifier/circuit, which is a well designed and proven to work well.
The easiest route is to purchase one from Larry:
A simpler design is posted here:
At 06:20 PM 9/26/2006, you wrote:
Thanks for this recommended site...I could not enlarge the PSN Preamp and
PSN filter Amp by Pete Rowe, to see the values on the drawings. I
searched the net but could not find any other site for them. Do you
know where I might be abe to find these, large enough to print?
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