Sean

Thanks for the details of the calibration circuit.  Mine appears to be working.  I
built it on a vector 'plug-in' card I found on my shelf.

New question!  I am looking at your seismic amplifier circuit and the photo of the
pc cards (seispreamp.jpg) and have a question?  What type of capacitor are used for
the high pass filters (330mF) on the pictured boards?

Thanks in advance



--
Rex Klopfentein, Jr.
rklopfen@.........
http://www.wcnet.org/~rklopfen



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