Thanks, Kay,  Yes may I have the parts list?   tchannel@............

Ted


----- Original Message ----- 
From: "Kay Wyatt" 
To: 
Sent: Friday, November 18, 2011 2:47 PM
Subject: Re: Spring for AS-1 type vertical seismometer


> Sorry about the delay in getting back to you.  I was in a bad accident 
> followed by surgery and physical therapy. But I am happy to say that I am 
> now walking again and back at my computer.
>
> The AS-1 came with 2 sizes of springs.  The early AS-1s had a very narrow 
> diameter spring and the newer AS-1s came with a 3/8" diameter spring.  I 
> used McMaster-Carr for about 3/4 of the items that I needed for the 
> seismometer.  The spring that I used is their part number 9664k19 
> described as "Spring-Tempered Steel Cont Extension Spring 36" Length, 3/8" 
> Outside Diameter, .035" Wire":
>    http://www.mcmaster.com/#9664k19/=ezpnh8
>
> Another question that I get asked often is what type of wire I used for 
> the pivot point.  I ordered it from www.SmallParts.com which is another 
> supplier that I like.  It is called "music wire" and is .020 inches in 
> diameter.  The part number is SMW-020-36-10 and is at
>    http://www.smallparts.com/dp/B001383CPS/ref=sp_dp_g2c_asin
> I have plenty extra of the music wire if you want me to mail it to you.
>
> I order all of my magnets from K&J Magnetics at www.kjmagnetics.com
> The magnetic damping devices requires four of part #BX084 which are 1" x 
> 1/2" x 1/4"
> The sensor assembly requires four of part #BX0X02 which are 1" x 1" x 1/8"
>
> I have a complete part list that I can supply anybody that wants it.
>
> Thanks!
> Kay Wyatt
>
>
>
> -----Original Message----- 
> From: tdavisjb
> Sent: Thursday, November 17, 2011 9:37 PM
> To: PSN Listserver
> Subject: Spring for AS-1 type vertical seismometer
>
> Folks,
> I am building a vertical seismometer based on drawings put together by Kay
> Wyatt (with help from Chris Chapman), it uses a piano wire hinge and the
> coil is attached to the boom. My current problem is locating a spring for
> this thing. I have found one at the local hardware store, it's long enough
> (about 14") but it's pretty large in diameter and perhaps a bit too stiff.
> I have tried to contact Kay but have had no luck. I work in a middle 
> school
> here in Portland (I'm the tech support person) and we have 2 AS-1's that I
> maintain. Their springs are much smaller in diameter. So I am wondering if
> any one on the list knows where, or how I would go about obtaining such a
> spring.
> I might mention that I have built two horizontal seismometers based on 
> the
> design that Chris Chapman helped to design in England for use in schools.
> They use crossed carbide rods for hinges. I wound my own coils and hope to
> have them up and recording within a year (being realistic here, as I have
> been working on all three seismometers, on and off for almost a year
> already). So I may be asking more questions!
> Thanks in advance for any help. You can respond here or email me direct:
> tdavisjb@............
>
>
>
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