Hi Ted
    It seems that we all have the issue of how sensitive to make the system. More sensitive and you can pick up more distant events but if it is too sensitive one gets clipped signals during stronger events. Larry's circuits and others have two recording gain levels which is probably the best but one could set the gain lower and use a higher bit A/D converter like 24 bit. I have plotted magnitude vs distance vs count for my systems and have selected some level which is ok with me for the time being but like any hobby, there is always a desire to improve.
  Regards
  Barry
   


    snip-
   
  Q 2. What are the expectations of a Lehman sensor?  I know that depends on many factors, and not the lease of which is the quality of the sensor, and its environment, as well as the type and location of the events.  But just in general terms. The AS1, which is not a Lehman suggest one should be able to see 6.0m from several thousand mile away, or something like that.
  The reason I ask, I do hear statements, both over and under my expectations.  Time will tell, but I wanted your opinions.
   
  Cheers, Ted
   
Hi Ted
  
  It seems that we all have the issue of how sensitive to make the system. More sensitive and you can pick up more distant events but if it is too sensitive one gets clipped signals during stronger events. Larry's circuits and others have two recording gain levels which is probably the best but one could set the gain lower and use a higher bit A/D converter like 24 bit. I have plotted magnitude vs distance vs count for my systems and have selected some level which is ok with me for the time being but like any hobby, there is always a desire to improve.
  
Regards
  
Barry
  
 

  
  
snip-
  
 
  
Q 2. What are the expectations of a Lehman sensor?  I know that depends on many factors, and not the lease of