In a message dated 11/09/2009, brett3nt@............. writes:

A few  days ago, Dave Nelson in California was able to obtain the loan of a 
 
Nanometrics Trillium Compact-120, a professional quality triaxial packed  
into a can only slightly larger than a large geophone.  Our plan is  to 
compare its output with the home-built Force Balance Vertical running  
beside it.

Soon after it was installed, California obliged with a  nice 3.9 up the 
coast which gave us a modest sized test signal containing  some higher 
frequency energy, which we could use to compare the two  instruments.


Hi Brett, Dave,
 
    I am glad to see that the Trillium checked out OK.  Well done!
 
    Regards,
 
    Chris






In a message dated 11/09/2009, brett3nt@............. writes:
A few=20
  days ago, Dave Nelson in California was able to obtain the loan of a=20
  
Nanometrics Trillium Compact-120, a professional quality triaxial pa=
cked=20
  
into a can only slightly larger than a large geophone.  Our pla=
n is=20
  to 
compare its output with the home-built Force Balance Vertical run=
ning=20
  
beside it.

Soon after it was installed, California obliged wi=
th a=20
  nice 3.9 up the 
coast which gave us a modest sized test signal conta=
ining=20
  some higher 
frequency energy, which we could use to compare the two=
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  instruments.

Hi Brett, Dave,
 
    I am glad to see that the Trillium checked ou=
t OK.=20
Well done!
 
    Regards,
 
    Chris