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<DIV><FONT face=Arial size=2>On assist springs, I think they can make a bad
action better by allowing the removal of excess key lead, not the right way to
fix things. But, fooling around with these things I was able to 'feel' the same
action with different amounts of key lead, an action with the same hammers,
ratio, and BW, but different leading. An old 550 Kawai had a nice action until I
unhooked the assist springs and added lead.</FONT></DIV>
<DIV><FONT face=Arial size=2>Fenton</FONT></DIV>
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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=tompiano@bellsouth.net href="mailto:tompiano@bellsouth.net">Tom
Servinsky</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> Wednesday, October 01, 2008 5:10
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: What's all this I hear about
Inertia ?</DIV>
<DIV><BR></DIV>
<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>
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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></BLOCKQUOTE></BODY></HTML>