PSN-L Email List Message

Subject: Re: C-Spring Sensor - 5/6 Second Period
From: Bob McClure bobmcclure90@.........
Date: Wed, 19 Jan 2011 11:03:26 -0500


Hi Chris,

  The link below is bad. The correct link is

http://www.jclahr.com/science/psn/roberts/index.html

  It would be great if you  could publish the actual circuit diagram for
your amplifier. Kay Wyatt manages the web site now.

Bob

On Wed, Jan 19, 2011 at 10:31 AM, Christopher Chapman wrote:

>
>     The response can easily be extended to over 20 seconds using Robert's
> circuit for extending the period of geophones. You can get a x10 period
> extension before running into sensor / amplifier noise, but it does mean
> that you have to build your own specialised amplifier - not too difficult to
> do using stripboard? See
> www.jclahr.com/science/psn/epics/roberts/index.html
>
>     Do look through the articles on the jclahr website.
>
>     Regards,
>
>     Chris Chapman
>
Hi Chris,

= =A0 The link below is bad. The correct link is

http://www.jclahr.com/science/p= sn/roberts/index.html

=A0 It would be great if you=A0 could publish the actual circuit diagra= m for your amplifier. Kay Wyatt manages the web site now.

Bob

On Wed, Jan 19, 2011 at 10:31 AM,= Christopher Chapman <chrisatupw@.......> wrote:

=A0=A0=A0 The response can easily be extended to over 20 sec= onds using Robert's circuit for extending the period of geophones. You = can get a x10 period extension before running into sensor / amplifier noise= , but it does mean that you have to build your own specialised amplifier - = not too difficult to do=A0using stripboard? See www.jclahr.co= m/science/psn/epics/roberts/index.html
=A0
=A0=A0=A0 Do look through the articles on the jclahr website.
=A0
=A0=A0=A0 Regards,
=A0
=A0=A0=A0 Chris Chapman


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