In a message dated 24/07/2005 18:15:13 GMT Daylight Time, mike8s2@.........  
writes:

Are you  guys absolutely sure the best source for geophones is Larry's?  I 
find  his a bit spendy - I bought some others for about ten dollars apiece - 
they  worked fine.  One was lost and the other I destroyed when I tried to  
convert in into a capacitance-type detector.



Hi Greg,
 
    I suggest that you check Ebay for geophones,  seismometer and seismic.
 
    You periodically get geophones for sale, mostly 14  Hz and above. Do also 
check the various Ebay 'stores'.
 
    Depends what you want to do, but you can make quite  a respectable 
geophone type sensor by sticking a weight to the centre of a  piezo sounder disk.
 
    Regards,
 
    Chris Chapman






In a message dated 24/07/2005 18:15:13 GMT Daylight Time, mike8s2@yahoo=
..com=20
writes:
<=
FONT=20
  style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size=
=3D2>Are you=20
  guys absolutely sure the best source for geophones is Larry's?  I fin=
d=20
  his a bit spendy - I bought some others for about ten dollars apiece - the=
y=20
  worked fine.  One was lost and the other I destroyed when I tried to=20
  convert in into a capacitance-type detector.


Hi Greg,
 
    I suggest that you check Ebay for geophones,=20
seismometer and seismic.
 
    You periodically get geophones for sale, mostly=
 14=20
Hz and above. Do also check the various Ebay 'stores'.
 
    Depends what you want to do, but you can make q=
uite=20
a respectable geophone type sensor by sticking a weight to the centre of&nbs=
p;a=20
piezo sounder disk.
 
    Regards,
 
    Chris Chapman