Gary, Don't know your circumstances, but I have a Lehman and know it is =
sensitive to weather fronts.   It will be normal, showing some day/night =
time noise differences then when a cold front come through the noise =
level gets very high, and in my case it only the weather.   I have ruled =
out temperature changes, sunny days, rainy days, even wind does not =
produce the noise level of a weather front.

Ted
  ----- Original Message -----=20
  From: Gary Lindgren=20
  To: psn-l@.................
  Sent: Friday, October 16, 2009 9:02 PM
  Subject: Background Noise


  After the big quakes in the South Pacific a couple weeks ago it seems =
to me that the background noise was very high after the events and =
stayed that way for many days. I had to lower the gain on my Lehman =
otherwise the display would be a mess. But now things are back to normal =
and low noise and I can crank up the gain again. There is always a =
chance that that the noise is from the ocean, but I don't think so. Did =
you noticed a jump in noise after the recent Big Ones. If so, is there =
any rule as to how long things take to cool off.

  Gary

  =20

  =20

  =20

  =20

  Gary Lindgren

  585 Lincoln Ave

  Palo Alto CA 94301

  =20

  650-326-0655

  =20

  www.blue-eagle-technologies.com   Check out Lastest Seismometer =
Reading

  cymonsplace.blogspot.com=20

  dtvtransitioninfo.blogspot.com        Information on how to cope with =
the transition to DTV=20

  =20

  =20







Gary, Don't know your circumstances, =
but I have a=20
Lehman and know it is sensitive to weather fronts.   It will =
be=20
normal, showing some day/night time noise differences then when a =
cold=20
front come through the noise level gets very high, and in my case it =
only the=20
weather.   I have ruled out temperature changes, sunny days, =
rainy=20
days, even wind does not produce the noise level of a weather=20
front.
 
Ted

  
----- Original Message ----- 
  From:=20
  Gary=20
  Lindgren 
  
To: psn-l@.............. 
  
Sent: Friday, October 16, 2009 =
9:02=20
  PM
  
Subject: Background Noise
  


  

  
After the big quakes in the South Pacific a =
couple weeks=20
  ago it seems to me that the background noise was very high after the =
events=20
  and stayed that way for many days. I had to lower the gain on my =
Lehman=20
  otherwise the display would be a mess. But now things are back to =
normal and=20
  low noise and I can crank up the gain again. There is always a chance =
that=20
  that the noise is from the ocean, but I don=92t think so. Did you =
noticed a jump=20
  in noise after the recent Big Ones. If so, is there any rule as to how =
long=20
  things take to cool off.
  
Gary
  
 
  
 
  
 
  
 
  
Gary=20
  Lindgren
  
585=20
  Lincoln Ave
  
Palo=20
  Alto CA 94301
  
 
  
650-326-0655
  
 
  
www.blue-eagle-technologies.com  =20
  Check out Lastest Seismometer=20
  Reading
  
cymonsplace.blogspot.com 
  
dtvtransitioninfo.blogspot.com    &n=
bsp;  =20
  Information on how to cope with the =
transition to=20
  DTV