Bob,

I have a little more update to date information on the AS-1.  You are =
correct that Jeff Batten passed away.  His wife has been able to engage =
a friend who is an electrical/mechanical engineer into taking on Jeff's =
work.  There is quite a bit of backlog in providing AS-1 seismometers to =
the IRIS Seismographs in Schools project http://www.iris.edu/hq/sis so =
he will be concentrating on that first.  However, I am told by IRIS that =
he is planning on making improvements to Jeff's design and will be =
working on that as soon as he can catch up.

Chris Chapman has provided me with one of his period extending circuit =
designs which I am testing.  Chris has been an invaluable resource to =
me.  I am so glad that he is back online.  What a resource he is!

Kay Wyatt


  ----- Original Message -----=20
  From: Bob McClure=20
  To: psnlist@.................
  Sent: Sunday, January 23, 2011 1:18 PM
  Subject: Re: AS-1 Type Sensor


    It seems for now that anyone who wants an AS-1 sensor will have to =
build their own. Chris Chapman informed me that GeoffBatten =
unfortunately died a couple of months back and his widow does not seem =
to have found anyone to make more AS-1's. I do not know how hard it will =
be to obtain the BlackBox amplifier that is a vital part of the AS-1 =
system. Chris may be eventually able to supply us with a circuit diagram =
of an amplifier providing the necessary bass boost, but he is =
recuperating at his home in the Midlands, and presently unable to access =
his papers in his primary residence in Upwaltham. Meanwhile, my digital =
inverse filter, implemented in WQFilter.exe, can be helpful. Larry is =
working on coding this filter for use in WinQuake.

   I want to remind all that the connections between the spring ends and =
the sensor are also flexure points, and deserve every bit as much =
attention to slip-stick friction and flat spots as the boom attachment. =
I have learned this from hard experience.

  Bob


  On Sun, Jan 23, 2011 at 2:54 PM, Richard Schneider  =
wrote:

    Hello PSN,

    I would appreciate any comments regarding my AS-1 type sensor. It's =
close to the original design. I did not like the knife edge aluminum =
boom attached to a score mark in the aluminum mast, so I modified the =
boom to mast attachment. I am using two razor blades. One on the boom =
and one on the mast. Hardened steel on steel. Friction is much less. =
Free running oscillations have a much longer duration. Does anyone have =
a better suggestion? I would like to hear from you.

    See my pic's here:  http://picasaweb.google.com/cfi2fly/MyPictures#

    Also, Chris, if you read this, if I reversed the coil and magnet, =
would the effort be worth the results?

    Thank you all,

    Richard








Bob,
 
I have a little more update to date information =
on the=20
AS-1.  You are correct that Jeff Batten passed away.  His wife =
has=20
been able to engage a friend who is an electrical/mechanical engineer =
into=20
taking on Jeff's work.  There is quite a bit of backlog in =
providing AS-1=20
seismometers to the IRIS Seismographs in Schools project http://www.iris.edu/hq/sis s=
o he will=20
be concentrating on that first.  However, I am told by IRIS that he =
is=20
planning on making improvements to Jeff's design and will be working on =
that as=20
soon as he can catch up.
 
Chris Chapman has provided me with one of his =
period=20
extending circuit designs which I am testing.  Chris has been an =
invaluable=20
resource to me.  I am so glad that he is back online.  What a =
resource=20
he is!
 
Kay Wyatt
 
 

  
----- Original Message ----- 
  From:=20
  Bob=20
  McClure 
  
To: psnlist@.............. =

  
Sent: Sunday, January 23, 2011 =
1:18=20
  PM
  
Subject: Re: AS-1 Type =
Sensor
  

  It seems for now that anyone =
who wants=20
  an AS-1 sensor will have to build their own. Chris Chapman informed me =
that=20
  GeoffBatten unfortunately died a couple of months back and his widow =
does not=20
  seem to have found anyone to make more AS-1's. I =
do not=20
  know how hard it will be to obtain the BlackBox amplifier that is a =
vital part=20
  of the AS-1 system. Chris may be eventually able to supply us with a =
circuit=20
  diagram of an amplifier providing the necessary bass boost, but he is=20
  recuperating at his home in the Midlands, and presently unable to =
access his=20
  papers in his primary residence in Upwaltham. Meanwhile, my digital =
inverse=20
  filter, implemented in WQFilter.exe, can be helpful. Larry is working =
on=20
  coding this filter for use in WinQuake.

 I want to remind =
all that=20
  the connections between the spring ends and the sensor are also =
flexure=20
  points, and deserve every bit as much attention to slip-stick friction =
and=20
  flat spots as the boom attachment. I have learned this from hard=20
  experience.

Bob


  
On Sun, Jan 23, 2011 at 2:54 PM, Richard =
Schneider=20
  <cfi2fly@.........> =
wrote:

  
    
Hello PSN,
    
 
    
I would appreciate any comments regarding my AS-1 type sensor. =
It's=20
    close to the original design. I did not like the knife=20
    edge aluminum boom attached to a score mark in the =
aluminum mast,=20
    so I modified the boom to mast attachment. I am using two =
razor=20
    blades. One on the boom and one on the mast. Hardened steel on =
steel.=20
    Friction is much less. Free running oscillations have a much longer=20
    duration. Does anyone have a better suggestion? I would like to hear =
from=20
    you.
    
 
    
See my pic's here:  http://picasaweb.google.com/cfi2fly/MyPictures#
=

    
 
    
Also, Chris, if you read this, if I reversed the coil and =
magnet,=20
    would the effort be worth the results?
    
 
    
Thank you all,
    
 

    =
Richard