Dear Alastair,


I've posted quite a bit of information related to making a seismometer
on

this page:

http://jjlahr.com/science/psn/epics/links.html


I'll also forward your question to the Public Seismic Network E-mail
list,

as some members may have a lead on an inexpensive, used
geophone.


For high frequency demonstration purposes, it may be possible to
dangle

a strong magnet inside a home wound coil to make your own
sensor.


Good luck,

John


From: "alastair mcarthur"
<a.mcarthur@...............>

To: <john@........>

Subject: geophone

Date: Thu, 24 Oct 2002 21:19:00 -0300



can't find a place to get a geophone. do you know anywhere?
the web site addresses have run out of them.

 

tried to make one but have difficulty getting a current
induced with home made coil and magnet . any tips?

 

enjoyed your web site on table top earthquake very clear and
informative. thanks