Tom,

Have you tried swapping channels on the Amp/Filter board by connecting the
Geophone to the Lehman input and the Lehman to the Geophone input? If the
problem moves then the problem is more likely with the sensor.

-Larry Cochrane
Redwood City, PSN


----- Original Message ----- 
From: "tdick" 
To: 
Sent: Monday, June 28, 2004 10:50 AM
Subject: Re: distortion on geophones


> Look at today's quakes --
> See all six Alaska and  Illinois unfiltered
http://Dad.bachcottage.com/June
> 28/raw pics&data . The more intense Illinois quake seems more distorted,
> even on the homemade vertical and Lehman's while not so on the Alaskan
> quake. If I am doing the filtering right, it seems to filter out on the
> homemade vertical and Lehman's -- see files unfiltered-filtered in same
> folder. If you have time,  look over this folder -- and any other stuff on
> this disk you have time -- I even enclosed raw data and individual event
> files. All electronics are yours. I did remove the jumpers on the amp
board.
>
>
> __________________________________________________________
>
> Public Seismic Network Mailing List (PSN-L)
>
> To leave this list email PSN-L-REQUEST@.............. with
> the body of the message (first line only): unsubscribe
> See http://www.seismicnet.com/maillist.html for more information.
>

__________________________________________________________

Public Seismic Network Mailing List (PSN-L)