Are Yous Guys by chance talking about
that sensor used in the musical instrument
called a theremin ? It was
developed by some Russian guy named Theremin ??
The instrument which is the hardest of all
to make sound good and was used in
the old science fictions of the 1950's ?
One proximity sensor is used for volume
and the other is used for frequency.

It is kind of like an AM and FM modulator
both rolled into one ??

It just may work as a Seismic Sensor if the span is set right.

Like zero to 100% within a millimeter ?

Any ideas here ?

----- Original Message ----- 
From: "GPayton" 
To: "Emma O'Malley" 
Cc: "PSN Network List" 
Sent: Thursday, July 01, 2010 6:53 AM
Subject: SEP Sensor from (MTUR) in the UK


> 
> Thank you for your excellent reply and description of the SEP sensor.  I am 
> sure that it will be helpful to interested  parties in our PSN group here in 
> the U.S.
> 
> Please let me clarify my questions.  Many of the amateur seismology people 
> here are using Larry Cochran's A/D Amp box from Webtronics in Redwood City, 
> California.  We are also using his WinSDR and WinQuake software packages for 
> display and analysis.
> 
> Many of us are very interested in the SEP Sensor, but wish it to be 
> compatible with our present equipment and software setup.  We realize that 
> it is designed, along with your A/D Amp box, to be used with Amaseis. But, 
> we observe that the connection from the magnet/coil goes directly into your 
> A/D Amp box and from there to the computer with AmaSeis software.
> 
> I appears obvious to me that the signal from the magnet/coil going to your 
> A/D box  would be a simple analog signal.  That is exactly what we use in 
> our setups.  Therefore, why couldn't that signal be plugged directly into 
> our A/D Amp box with the RCA plug?  We would not use your box and software, 
> unless we chose to use it, and would the option of either type connection.
> 
> Secondly, cost and shipping of the SEP is a major factor!  The sensor 
> obviously is of outstanding construction.  However, since the majority of 
> our users here are not educational institutions or commercial companies, we 
> do not have unlimited funds.  Many of us are retired and enjoy seismology as 
> a hobby.  Those of us that have the ability, construct our own sensors from 
> whatever materials we can.
> 
> Months ago, I asked and was told that you were investigating the ability of 
> paying for the SEP with credit cards.  I have never heard anymore or see 
> anything on your webpage indicating that is possible.  Furthermore, we need 
> to know what the estimated shipping costs might be to the U.S.
> 
> Believe me!  There IS an interest in the SEP sensor here in the U.S.
> 
> Best regards,
> Gerald Payton.
> 
> --------------------------------------------------------------------------------
> 
>  ----- Original Message ----- 
>  From: Emma O'Malley
>  To: gpayton@.............
>  Sent: Thursday, July 01, 2010 7:10 AM
> 
> 
>  Here's the Answer for the technical question:
> 
> 
> 
>  The Seismometer electronics were designed with Amaseis in mind. An extra 
> option for the SEP Seismometer was added to Amaseis, however, the data 
> format is fairly standard over the 9600 baud serial link. The protocol 
> transmits each sampled value (every 1/20th of a second) as an ASCII string, 
> i.e. -32767 to +32767 followed by a CR and LF. Hence, the data could 
> certainly be captured and analyzed without Amaseis.
> 
> 
> 
>  Hope this helps.
> 
> 
> 
> 
> 
>  Kind Regards
> 
> 
> 
> 
> 
> 
> 
>  Emma O'Malley
> 
>  Sales Administrator
> 
>  Teaching Resources Ltd
> 
>  (MUTR)
> 
>  Unit 10
> 
>  The IO Centre
> 
>  Lea Road
> 
>  Waltham Cross
> 
>  Herts
> 
>  EN9 1AS
> 
>  01992 716052 TEL
> 
>  01992 719474 FAX
> 
> 
> 
> 
>
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