<!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 6.00.6000.16608" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Oh yea, Yamaha's from the 60's and early 70's had this problem. </FONT></DIV> <DIV><FONT face=Arial size=2>Regarding the non returning jack in an upright with all regulation and friction proper in the action, do not forget the key. It must not have excess friction and must be balanced correctly. Also check hyper active whip assist springs.</FONT></DIV> <DIV><FONT face=Arial size=2>Fenton</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=ptuner1@gmail.com href="mailto:ptuner1@gmail.com">Avery Todd</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> Thursday, March 20, 2008 8:50 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Yamaha Jack issue</DIV> <DIV><BR></DIV> <DIV>I've never heard of that on Yamaha's. I "think" it was Samick that had that problem. </DIV> <DIV> </DIV> <DIV>Avery Todd</DIV> <DIV>Houston, TX <BR><BR></DIV> <DIV class=gmail_quote>On Wed, Mar 19, 2008 at 10:34 PM, Greg Newell <<A href="mailto:gnewell@ameritech.net">gnewell@ameritech.net</A>> wrote:<BR> <BLOCKQUOTE class=gmail_quote style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> <DIV lang=EN-US link="blue" vlink="purple"> <DIV> <P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">Steve,</SPAN></P> <P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">                Are you sure this isn't a center pin plating issue? I recall reading somewhere that the plating comes loose and binds in the action center. The more you play it the worse it gets until you stop for a while.</SPAN></P> <P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d"></SPAN> </P> <DIV> <P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">Greg Newell</SPAN></P> <P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">Greg's Piano Forté</SPAN></P> <P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d"><A href="http://www.gregspianoforte.com/" target=_blank>www.gregspianoforte.com</A></SPAN></P> <P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">216-226-3791 (office)</SPAN></P> <P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">216-470-8634 (mobile)</SPAN></P></DIV> <P><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d"></SPAN> </P> <DIV> <DIV style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none"> <P style="MARGIN-LEFT: 0.5in"><B><SPAN style="FONT-SIZE: 10pt">From:</SPAN></B><SPAN style="FONT-SIZE: 10pt"> <A href="mailto:pianotech-bounces@ptg.org" target=_blank>pianotech-bounces@ptg.org</A> [mailto:<A href="mailto:pianotech-bounces@ptg.org" target=_blank>pianotech-bounces@ptg.org</A>] <B>On Behalf Of </B>Steve Blasyak<BR><B>Sent:</B> Wednesday, March 19, 2008 12:29 PM<BR><B>To:</B> <A href="mailto:pianotech@ptg.org" target=_blank>pianotech@ptg.org</A><BR><B>Subject:</B> Yamaha Jack issue</SPAN></P></DIV></DIV> <P style="MARGIN-LEFT: 0.5in"> </P> <P style="MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 0.5in; MARGIN-RIGHT: 0in"><SPAN style="FONT-SIZE: 10pt">Terry,<BR> <BR>I had the same problem with an M 500 a couple of weeks ago. I have had similar problems/ issues with consoles or uprights in the past usually in the high treble were the hammers are lighter. I always considered this a key weighting issue. This particular instance was at B 1. Checked all friction, whippen, jack and hammer. All good, in fact if anything they were pinned too loose. Tried more lost motion, lubricated jack, teflon on butt leather. Increased key dip. Increased jack spring tension. Nothing worked. Well in the end, with the damper pedal depressed and rapidly playing the note it would fail after about twenty repetitions. Under normal playing, if the jack failed to return under the hammer butt, as soon as you release the damper pedal the jack would slip back under the hammer butt. So I told the client "that's as good as it gets", and called it a day. Driving away, I tried to rationalize that it was an unexplained phenomenon. I could not escape the feeling of failure to solve the problem.<BR> <BR>One thing that was mentioned by someone I can't remember who. What would the key bed have to do with this phenomenon?  <BR> <BR>Steve Blasyak<BR>Orange County Ca.<BR> <BR>Pura Vida<BR><BR></SPAN></P> <DIV style="MARGIN-LEFT: 0.5in; TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 10pt"> <HR align=center width="100%" SIZE=2> </SPAN></DIV> <P style="MARGIN-LEFT: 0.5in"><SPAN style="FONT-SIZE: 10pt">Need to know the score, the latest news, or you need your Hotmail®-get your "fix". <A href="http://www.msnmobilefix.com/Default.aspx" target=_blank>Check it out.</A></SPAN></P></DIV></DIV></BLOCKQUOTE></DIV><BR></BLOCKQUOTE></BODY></HTML>