<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=us-ascii"> <META content="MSHTML 6.00.2800.1126" name=GENERATOR></HEAD> <BODY> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2>Hi, what a great setup !</FONT></SPAN></DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2>It may certainly produce the same effect on touch that the assist springs.</FONT></SPAN></DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2>I am unsure of the magnets, I used to buy some ceramic magnets in time, and = they where VERY expensive, and very strong, don't get demagnetized with time, = and so on.</FONT></SPAN></DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2>Are they the same or the same kind, that should price less actually.</FONT></SPAN></DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2>Amazing, congratulations Ric.</FONT></SPAN></DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2>I may think about it now !</FONT></SPAN></DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2></FONT></SPAN> </DIV> <DIV><SPAN class=329551110-21062003><FONT face=Arial color=#0000ff = size=2>Greetings.</FONT></SPAN></DIV> <DIV> </DIV> <P><FONT size=2>Isaac OLEG<BR><BR>Entretien et réparation de pianos.<BR><BR>PianoTech<BR>17 rue de Choisy<BR>94400 VITRY sur SEINE<BR>FRANCE<BR>tel : 033 01 47 18 06 98<BR>fax : 033 01 47 18 06 = 90<BR>cell: 06 60 42 58 77 </FONT></P> <BLOCKQUOTE dir=ltr style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px = solid; MARGIN-RIGHT: 0px"> <DIV class=OutlookMessageHeader dir=ltr align=left><FONT = face=Tahoma size=2>-----Message d'origine-----<BR><B>De :</B> pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]<B>De la = part de</B> Richard Brekne<BR><B>Envoyé :</B> vendredi 20 juin = 2003 16:45<BR><B>À :</B> PTG<BR><B>Objet :</B> Re: Virtual = Capstan<BR><BR></FONT></DIV>Hi folks <P>I managed to find a few Neodym Magnets of an appropriate dimension = today. These are much stronger and probably more or less what should be used = for this application. <P>Each weighs about 0.8 grams, and has quite a bit more energy then = the ones I posted figures for earlier on. <P>So below is a picture with a very basic way of installing them and = the resulting figures. I changed a tight center on the hammershank flange = so the non magnet figures are slightly different. We have: <P>30 grams FW <P>No magnents    DW/UW  50/31 <P>Magnets at 10 mm seperation DW/UW 48/30 <P>Magnets at 6 mm seperation   DW/UW 43/26 <P>Total weight of the added parts was 6.3 grams <P>Not much mass, lots of distance, and more effect then will ever be = needed. One thing I noticed already about the touch. The key gets an extra = shove down, yet there is no real bump with the wippen coming back into contact... = because the magnets insure a soft landing as it were. <BR>  <P><IMG height=423 src="cid:329551110@21062003-253e" width=380> = <BR>  <P>Cheers <P>A good technician friend of mine and I are going to work up a = really nice installation proceedure and presentation after we finish refining this = angle on the idea and testing it out on an August Forster Grand. <P>Total cost... about 3 hours work for installation, and about 40 = cents a magnet or just under a 150 dollars if you use four as in the example. = Looks to me tho that you could easily use just 3, if not 2 and still get plenty = effect while still leaving more then ample space for regulating the standard = capstan. <P>-- <BR>Richard Brekne <BR>RPT, N.P.T.F. <BR>UiB, Bergen, Norway = <BR><A href="mailto:rbrekne@broadpark.no">mailto:rbrekne@broadpark.no</A> = <BR><A = href="http://home.broadpark.no/~rbrekne/ricmain.html">http://home.broad= park.no/~rbrekne/ricmain.html</A> <BR><A = href="http://www.hf.uib.no/grieg/personer/cv_RB.html">http://www.hf.uib= .no/grieg/personer/cv_RB.html</A> <BR>  </P></BLOCKQUOTE></BODY></HTML>