Subject: Re: Spring for AS-1 type vertical seismometer

Another question that I get asked often is what type of wire I used for the=
=20
ivot point.  I ordered it from www.SmallParts.com which is another supplier=
=20
hat I like.  It is called "music wire" and is .020 inches in diameter.  The=
=20
art number is SMW-020-36-10 and is at
   http://www.smallparts.com/dp/B001383CPS/ref=3Dsp_dp_g2c_asin
 have plenty extra of the music wire if you want me to mail it to you.=20
Kaye
Hi There,=20
    Smallparts only sell Music Wire in coils of 10 lengths,=20
which amateur seismologists are unlikely to need and it is=20
plain steel wire! www.daddario.com sell Nickel plated music=20
wire (rust resistant!) in single string lengths and it is=20
available at Music Shops who cater for stringed instruments.=20
    You might use 10 or 12 thou wire for AS1 type flex=20
suspensions. 20 thou is a bit thick in my experience. Piano=20
wire is really tough stuff ! Look for Mandolin strings ?
    You can also wind your own springs from Music Wire, but=20
you need to twist it tightly before winding it onto a suitable=20
mandrel under quite a high constant tension. This does take=20
some skill and experience !
    Regards,
    Chris Chapman


=
Subject: Re: Spring for AS-1 type vertical seismometer



Another question that<=
/FONT> I get asked often is what type =
of wire I used for the=20
pivot point.  I =
ordered it from www.SmallPar=
ts.com which is another supplier=20
that I like.  It=
 is called "music wire" and is =
..020 inches in diameter.  The=20
part number is SMW-020-36-10 and is at
    http://www.smallpart=
s.com/dp/=
B001383CPS/ref=3Dsp_dp_g2c_asin
I have plenty ex=
tra of the music wire if you want me to mail it to you. 
Kaye

Hi There, 
    Smallparts only sell Music Wire in coils of 10 lengths=
, 
which =
amateur seismologists are unlikely to need and it is 
plain steel wire! www.daddario.com sell Nickel plated music 

<=
TT>wire (rust resistant!) in =
single string lengths and it is 

available at Music S=
hops who cater for stringed instruments. 

    You mig=
ht use 10 or 12 thou wire for AS1 type flex 

suspensions. 20 thou is a bit thick in my experience=
.. Piano 

wire is reall=
y tough stuff ! Look for Mandolin strings ?<=
/FONT>

    You c=
an also wind your own springs from Music Wire, but 

you need to twist it tightly bef=
ore winding it onto a suitable 

mandrel under quite a=
 high constant tension. This does take 

some skill an=
d experience !

    Regards,

    Chris Chapman