<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Ok, then my next line of reasoning would be two-fold:</DIV> <DIV>1. an extremely worn key-end felt. On a soft blow the underlever is implanted deep in the worn key-end felt making is difficult to get the key in motion. But after accelation, or a heavy blow, the underlever has past the worn surface and the key is free to move.</DIV> <DIV>2. could be that in addition to this problem the damper underlevers have been regulated way to low, compounding the problem.</DIV> <DIV>Tom Servinsky<BR>--- On <B>Sat, 7/16/11, tnrwim@aol.com <I><tnrwim@aol.com></I></B> wrote:<BR></DIV> <BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From: tnrwim@aol.com <tnrwim@aol.com><BR>Subject: Re: [pianotech] Weekend puzzler<BR>To: pianotech@ptg.org<BR>Date: Saturday, July 16, 2011, 11:13 AM<BR><BR> <DIV id=yiv35256685><FONT color=black size=2 face=arial> <DIV><FONT face="Arial, Helvetica, sans-serif">Flat knuckle</FONT></DIV> <DIV>Center pin coming out of jack, rubbing against neighbor jack flange</DIV> <DIV>Burr on top of front rail pin. </DIV> <DIV> </DIV> <DIV>Wim<BR><BR></DIV> <DIV style="CLEAR: both"></DIV><BR><BR> <DIV style="FONT-FAMILY: arial, helvetica; COLOR: black; FONT-SIZE: 10pt">-----Original Message-----<BR>From: Delwin D Fandrich <del@fandrichpiano.com><BR>To: pianotech <pianotech@ptg.org><BR>Sent: Fri, Jul 15, 2011 8:09 pm<BR>Subject: [pianotech] Weekend puzzler<BR><BR> <DIV id=yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac> <STYLE>#yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac td{color:black;} _filtered #yiv35256685 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;} _filtered #yiv35256685 {font-family:"Comic Sans MS";panose-1:3 15 7 2 3 3 2 2 2 4;}#yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac p.yiv35256685MsoNormal, #yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac li.yiv35256685MsoNormal, #yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac div.yiv35256685MsoNormal {margin:0cm;margin-bottom:.0001pt;font-size:11.0pt;font-family:"sans-serif";}#yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac a:link, #yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac span.yiv35256685MsoHyperlink {color:blue;text-decoration:underline;}#yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac a:visited, #yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac span.yiv35256685MsoHyperlinkFollowed {color:purple;text-decoration:underline;}#yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac span.yiv35256685EmailStyle17 {font-family:"Comic Sans MS";color:windowtext;font-weight:normal;font-style:normal;text-decoration:none none;}#yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac .yiv35256685MsoChpDefault {font-family:"sans-serif";} _filtered #yiv35256685 {margin:72.0pt 72.0pt 72.0pt 72.0pt;}#yiv35256685 #yiv35256685AOLMsgPart_1_b6d44cdf-a122-4906-9946-5f92e9b936ac div.yiv35256685WordSection1 {}</STYLE> <DIV class=yiv35256685WordSection1> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 12pt">The piano is a 1928 Chickering Model M, Scale 141 (small concert size). The problem is this:</SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 12pt"> </SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 12pt">As the key is depressed slowly—<I>pianissimo</I>—for the first millimeter or so the key and hammer move smoothly. Then something starts binding, it feels like something in the action is dragging, holding the key and action back. After forcing the key down another three or four millimeters action becomes free and everything operates normally. On a medium to hard blow there is good power and the problem is hardly noticeable but at <I>pianissimo</I> the action will hardly play.</SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 12pt"> </SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 12pt">What is the problem and what caused it?</SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 12pt"> </SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 12pt">ddf</SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 12pt"> </SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 10pt">Delwin D Fandrich</SPAN><SPAN style="COLOR: #632423; FONT-SIZE: 10pt"></SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 10pt">Piano Design & Fabrication</SPAN><SPAN style="COLOR: #632423; FONT-SIZE: 10pt"></SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="COLOR: #632423; FONT-SIZE: 10pt">6939 Foothill Court SW, </SPAN><SPAN style="FONT-SIZE: 10pt">Olympia, Washington 98512 USA</SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 10pt">Phone  360.515.0119 — Cell  360.388.6525</SPAN><SPAN style="COLOR: #632423; FONT-SIZE: 10pt"></SPAN></DIV> <DIV class=yiv35256685MsoNormal><SPAN style="FONT-SIZE: 10pt"><A href="http://us.mc1810.mail.yahoo.com/mc/compose?to=del@fandrichpiano.com" rel=nofollow target=_blank ymailto="mailto:del@fandrichpiano.com">del@fandrichpiano.com </A></SPAN><SPAN style="FONT-SIZE: 10pt">— </SPAN><SPAN style="FONT-SIZE: 10pt"><A href="http://us.mc1810.mail.yahoo.com/mc/compose?to=ddfandrich@gmail.com" rel=nofollow target=_blank ymailto="mailto:ddfandrich@gmail.com">ddfandrich@gmail.com</A></SPAN></DIV> <DIV class=yiv35256685MsoNormal> </DIV></DIV></DIV></DIV></FONT></DIV></BLOCKQUOTE></td></tr></table>