PSN-L Email List Message

Subject: RE: homebrew shake table?
From: "Finke, John" John.Finke@..........
Date: Mon, 11 Feb 2002 11:46:14 -0500

One of the cheapest shake tables I've seen involves a couple of small sheets
of plywood (one for the base and one for the actual table), 2-aluminum rods,
2-aluminum pipes, a crankshaft made of a length of wire hanger, and finally
a variable speed drill.  It works great for kids/displays at school.  If I'm
not mistaken this was put together by John Lahr and is(was) shown on his
website.  If you need some more information and can't get it from him, let
me know and I will sketch something up.

John Finke, P.E., S.E.
Jacobs Engineering

-----Original Message-----
From: David Saum [mailto:DSaum@.............
Sent: Monday, February 11, 2002 10:28 AM
To: psn-l@..............
Subject: homebrew shake table?

I am working on some feedback electronics to
improve the low frequency response of geophones,
and I need some way to test my systems.

It looks like a need a "shake table" that can operate
in the 0.1 to 10 Hz range.  Can anyone help me
with a simple (cheap!) design?




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