PSN-L Email List Message

Subject: Re: AS-1 Type Sensor
From: Bob McClure bobmcclure90@.........
Date: Sun, 23 Jan 2011 16:18:20 -0500


  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
>
=A0 It seems for now that anyone who wants an=
 AS-1 sensor will have to build their own. Chris Chapman informed me that G=
eoffBatten unfortunately died a couple of months back and his widow does no=
t 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 w=
ith a circuit diagram of an amplifier providing the necessary bass boost, b=
ut he is recuperating at his home in the Midlands, and presently unable to =
access his papers in his primary residence in Upwaltham. Meanwhile, my digi=
tal inverse filter, implemented in WQFilter.exe, can be helpful. Larry is w=
orking on coding this filter for use in WinQuake.

=A0I want to remind all that the connections between the spring ends an= d the sensor are also flexure points, and deserve every bit as much attenti= on to slip-stick friction and flat spots as the boom attachment. I have lea= rned this from hard experience.

Bob

On Sun, Jan 23, 2011 at 2:54 PM, = Richard Schneider <cfi2fly@.........> wrote:
Hello PSN,
=A0
I would appreciate any comments regarding my AS-1 type sensor. It'= s close to the original design. I did not like the=A0knife edge=A0aluminum = boom=A0attached to a score mark in the aluminum mast, so I=A0modified the b= oom=A0to 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 runni= ng oscillations have a much longer duration. Does anyone have a better sugg= estion? I would like to hear from you.
=A0
See my pic's here:=A0 http://picasaweb.google.com/cfi2fly/MyPict= ures#
=A0
Also, Chris, if you read this,=A0if I reversed the coil and magnet, wo= uld the effort be worth the results?
=A0
Thank you all,
=A0
Richard


[ Top ] [ Back ] [ Home Page ]