Chris,

There was no HTML attachment associated with you message. What did we =
miss?

-Tim-

=20

-----Original Message-----
From: psn-l-request@.............. [mailto:psn-l-request@............... =
On
Behalf Of ChrisAtUpw@.......
Sent: Friday, October 27, 2006 7:16 PM
To: psn-l@..............
Subject: Re: My seismometer vault solution

=20

In a message dated 2006/10/27, geodynamics@....... writes:




Even slight jostling of the geophones can generate a pretty strong =
signal --
well in excess of 10-volts -- that can over-saturate or even damage some =
ADC
boards.



Hi Tim,

       Jon is using one of Larry's amplifiers. It has 12 V rails.

       If Jon does as you suggest and the whole area floods with snow =
melt
water, melts and re freezes a few times, won't it likely damage the
geophones? The climate in Iceland is chilly in winter. I would enclose =
them
in a sealed container under dry sand. It is not difficult to seal cable =
into
plastic water pipe. You can easily buy tank fittings for plastic water =
pipe
to seal to a container.=20

       Can you check this message and see if there is a HTML attachment,
please?

       Regards,

       Chris Chapman

















Chris,


There was no HTML attachment =
associated
with you message. What did we miss?

-Tim-

 

-----Original =
Message-----

From: =
psn-l-request@..............
[mailto:psn-l-request@............... On
Behalf Of ChrisAtUpw@.......

Sent: Friday, October 27, =
2006
7:16 PM

To: psn-l@..............=


Subject: Re: My =
seismometer vault
solution

 

In a message dated =
2006/10/27,
geodynamics@....... writes:







Even slight jostling of the
geophones can generate a pretty strong signal -- well in excess of =
10-volts --
that can over-saturate or even damage some ADC boards.





Hi Tim,



       Jon is using one of Larry's =
amplifiers. It
has 12 V rails.



       If Jon does as you suggest and the =
whole
area floods with snow melt water, melts and re freezes a few times, =
won't it
likely damage the geophones? The climate in Iceland is chilly in winter. =
I
would enclose them in a sealed container under dry sand. It is not =
difficult to
seal cable into plastic water pipe. You can easily buy tank fittings for
plastic water pipe to seal to a container. 



       Can you check this message and see =
if
there is a HTML attachment, please?



       Regards,



       Chris Chapman