Wellll, actually just build your stages adjustable
then you can tweak whatever until you see the grass.

Thats all you need just give it what it needs till
you see the grass.

Once you see that grass you should be doing the best you can.


----- Original Message ----- 
From: "Barry Lotz" 
To: 
Sent: Monday, December 28, 2009 7:24 PM
Subject: Re: two-stage Roberts circuit amplifier


Chris
It took a little clearing of the cobwebs to duplicate the gain you got but I did. Thanks.

Regards
Barry
http://www.seismicvault.com

--- On Sun, 12/27/09, ChrisAtUpw@.......  wrote:

From: ChrisAtUpw@....... 
Subject: Re: two-stage Roberts circuit amplifier
To: psn-l@..............
Date: Sunday, December 27, 2009, 8:48 PM



 


In a message dated 28/12/2009, barry_lotz@............. writes:

  
    
    
      
        

        
        Hi Barry,
        
        If you 
        wished to get 20 seconds from a 1.5 second pendulum, you would need a 
        total gain at 20 seconds of 178. Each stage will need a gain of 
        13.3
        
Regards,

Chris 
Chapman 
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