I am thinking of building an AS-1 type seismometer.

Can anyone tell me what type of spring I should use and where it can be =
obtained from?


Dewayne Hill=20








I am thinking of building an AS-1 type=20
seismometer.
 
Can anyone tell me what type of spring =
I should use=20
and where it can be obtained from?
 
 
Dewayne Hill 
Westminster,=20
Co.