<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; =
charset=windows-1252">
<META content="MSHTML 6.00.2800.1141" name=GENERATOR>
<STYLE>@page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.25in 1.0in =
1.25in; }
P.MsoNormal {
        FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"
}
LI.MsoNormal {
        FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"
}
DIV.MsoNormal {
        FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"
}
A:link {
        COLOR: blue; TEXT-DECORATION: underline
}
SPAN.MsoHyperlink {
        COLOR: blue; TEXT-DECORATION: underline
}
A:visited {
        COLOR: purple; TEXT-DECORATION: underline
}
SPAN.MsoHyperlinkFollowed {
        COLOR: purple; TEXT-DECORATION: underline
}
SPAN.EmailStyle17 {
        COLOR: windowtext; FONT-FAMILY: Arial
}
DIV.Section1 {
        page: Section1
}
</STYLE>
</HEAD>
<BODY lang=EN-US vLink=purple link=blue bgColor=#ffffff>
<DIV><FONT size=2></FONT> </DIV>
<BLOCKQUOTE dir=ltr
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=tomtuner@attbi.com href="mailto:tomtuner@attbi.com">Tom =
Driscoll</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, March 06, 2003 =
10:06
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Yamaha U1 regulation
problem</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">List</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> =
I recently serviced a U1 vertical for a first time client. Excellent =
piano
very little wear and -tuned up quite well. </SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> =
I did however find lettoff to be over !/4 “and inconsistent.
</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> =
I adjusted to 1/8” –and took up lost motion. Tightened action =
screws. The key
dip and after touch were sufficient, and the jacks are free to travel =
away
from the butts---no interference from that adjustable rail—(sorry, I =
forget
Y’s nomenclature on that component)</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> =
My client has a light touch and the action still =
stutters</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I returned, shortened =
blow
distance readjusted lost motion, and adjusted spoons to re-correct =
damper
timing.</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> =
My client called again with the same problem and called other =
technicians for
advice also </SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> =
I know bobbling hammers can be a problem on Yamaha verticals and =
I’ve worked
on hundreds of these, but I can’t shorten blow any more and as I =
mentioned,
keydip-aftertouch are correct. I’m hesitant to increase lettoff back =
to its
original excessive amount, so esteemed colleagues ---Any suggestions? =
I’m
going back next week. </SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> =
P.S. Backchecks are also adjusted---I.E. catchers are not =
bouncing out
or off of the backchecks</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> =
Tom Driscoll</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> I =
also
encountered bobbling hammers on many Yamaha verticals during my eight =
years
with a Yamaha dealer. One of the most common responses =
from Buena
Park when I asked for technical help was to tell the customers to =
press the
keys all the way to the bottom with no hesitation mid-stroke. =
[Almost
any vertical can be made to bobble by hesitating mid-stroke]. =
Your
client's light touch might at times be "hesitating" enough on certain =
blows to
cause bobbling. But I realize telling people they're playing =
"wrong" is
a delicate situation. The only other thing the tech. folks at =
Yamaha
would suggest was to check the pinning and the spring strength. =
I think
too tight a center pin can contribute to bobbling as well as too weak =
a hammer
return spring (the Schwander type springs are considerably lighter =
than the
traditional long ones mounted on a separate spring rail). [A =
side note
not really having to do with this problem: The let-off on the =
pianos
with the Silent Piano feature is 1/4" or wider, I believe, and =
supposedly the
touch doesn't suffer. Haven't played one enough to know,
though.]</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">
--Dave Nereson, RPT,
Denver</SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>