Subject: Re: C-Spring Sensor - 5/6 Second Period


Hi Chris,
Thanks for sending information on imnproving the C-Spring Sensor.  Just a q=
uick correction on the link to Robert's circuit for extending the period of=
 geophones.  Leave out the "epics" part of your link.
http://www.jclahr.com/science/psn/roberts/index.html

Hi Kay,

    Thank you. I am using a new laptop with Windows7. It seems to be unreli=
able. The roberts =20
How would you compare the C-Spring sensor to an AS-1 type vertical seismome=
ter modified with either a "piano wire hinge" or a razer blade hinge clampe=
d at both ends?
=20







=
Subject: Re: C-Spring Sensor - 5/6 Second Period







Hi Chris,


Thanks for sending information on imnproving the C-=
Spring Sensor.  Just a quick correction on the link to Robert's circui=
t for extending the period of geophones.  Leave out the "epics" part o=
f your link.


http://www.jclahr.com/science/psn/roberts/ind=
ex.html


 


Hi Kay,


 


    Thank you. I am using a new laptop with Windows7. I=
t seems to be unreliable. The roberts  


How would you compare the C-Spring sensor to an AS-=
1 type vertical seismometer modified with either a "piano wire hinge" or a =
razer blade hinge clamped at both ends?