<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.6000.16705" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY
style="WORD-WRAP: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space"
bgColor=#ffffff>
<DIV>And assist springs, even the adjustable,good kind, have never felt as
satisfying to me as an action with the ideal hammer weight, action ratio,
balance weight, and front weights, and regulated well: by feel, by the "sweet
spot," where the action feels its most "buttery" and responsive.</DIV>
<DIV> </DIV>
<DIV><FONT face="Century Schoolbook" size=2>Amen, David. Bingo! My thoughts
exactly.</FONT></DIV>
<DIV><FONT face="Century Schoolbook" size=2>Tom Servinsky</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=david@davidandersenpianos.com
href="mailto:david@davidandersenpianos.com">David Andersen</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">Pianotech List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, September 30, 2008 7:01
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: What's all this I hear about
Inertia ?</DIV>
<DIV><BR></DIV><BR>
<DIV>
<DIV>On Sep 30, 2008, at 8:46 AM, Fenton Murray wrote:</DIV><BR
class=Apple-interchange-newline>
<BLOCKQUOTE type="cite">
<P style="MARGIN: 0px"><FONT style="FONT: 16px Helvetica" face=Helvetica
size=5>If you have heavy hammers, or a high action ratio, or even worse
both, you will start to end up with too much lead in the key unless you are
using assist springs.</FONT></P></BLOCKQUOTE>And assist springs, even the
adjustable,good kind, have never felt as satisfying to me as an action with
the ideal hammer weight, action ratio, balance weight, and front weights, and
regulated well: by feel, by the "sweet spot," where the action feels its most
"buttery" and responsive.</DIV>
<DIV>On a well-made action that sweet spot falls within very narrow parameters
of distance and weight. Here are some of my ideal parameters:</DIV>
<DIV>-action ratio: 5.5-5.7</DIV>
<DIV>-balance weight: 37-39</DIV>
<DIV>-blow distance: 46mm MINIMUM - 48mm</DIV>
<DIV>-key travel: 10.2-10.5mm</DIV>
<DIV>
<BLOCKQUOTE type="cite">
<P style="MARGIN: 0px"><FONT style="FONT: 16px Helvetica" face=Helvetica
size=5>These actions are not going to 'feel' right even though they may have
great numbers. I don't know any way too measure this easily with weights at
the key board, but<SPAN class=Apple-style-span style="FONT-SIZE: 19px"> I
have become pretty good at feeling it through all the great mistakes I've
made</SPAN>.</FONT></P></BLOCKQUOTE>As Erwin says, zzzzactly. You get to a
point where your hands, your ears, your feeling sense, your eyes, your
perceptions, are the vast and fundamental basis of any diagnosis. It's a
quick, intuitive process, ratified and focused by testing with the Stanwood
protocols, and it works like magic. When the change is made the client is
ecstatic.</DIV>
<DIV>David A. <BR>
<BLOCKQUOTE type="cite">
<P style="MARGIN: 0px"><FONT style="FONT: 16px Helvetica" face=Helvetica
size=5>Respectfully,</FONT></P>
<P style="MARGIN: 0px"><FONT style="FONT: 16px Helvetica" face=Helvetica
size=5>Fenton</FONT></P></BLOCKQUOTE></DIV><BR></BLOCKQUOTE></BODY></HTML>