<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=US-ASCII"> <META content="MSHTML 6.00.2900.2873" name=GENERATOR></HEAD> <BODY id=role_body style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Arial" bottomMargin=7 leftMargin=7 topMargin=7 rightMargin=7><FONT id=role_document face=Arial color=#000000 size=2> <DIV> <DIV>   Hi RIc</DIV> <DIV>   The short version is that the geometry is really good.  It's like 5.2 to 1.  Problem is they then over tax the system with a hammer that weighs way too much.  ie.  Note 4- 12.5 grams note 40.--8.5 grams.</DIV> <DIV>   Then they compensate with lead & wippen helper springs so they end up having an action that feels like to much intertia. Mostly with the springs</DIV> <DIV>  The real fix is to lighten or replace the hammers.  I vote replace as the old ones are funky.</DIV> <DIV>  reweigh the keys without the helper springs hooked up but allow  some effect in your touch weight equation so that they only lift about 10 grams.  This will solve your problems & make the action play like butter.  As far as I can tell by they old & new examples I've worke on personally, they have always done it this way. GO figure.</DIV> <DIV>  Dale</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size=2> <DIV>  <DIV>Hi List,</DIV> <DIV>I am trying to find out more about Petrof grand actions and what appears to be a problem with their setting-up/geometry etc.  I recently came across a 12 year old large grand which has potentially very good sound qualities but a lousy feel to the touch.  Whilst I need to go back and carry out an in-depth inspection to make further judgement, my limited experience of Petrof grands is that they generally have a question mark over the touch.  There are some quite negative comments on the web, particularly from a team from a music institution who tried out several instruments.</DIV> <DIV>Have any of you action geometry guys had experience of analyzing the Petrof  action and doing any re-thinking on it?   This particular one is quoted as having a Renner action.</DIV> <DIV>I would appreciate any leads on this before I venture quite a long distance to see it again.</DIV> <DIV> </DIV> <DIV>Thanks,</DIV> <DIV> </DIV> <DIV>ric</DIV></DIV></FONT></BLOCKQUOTE></DIV> <DIV></DIV> <DIV> </DIV> <DIV> </DIV> <DIV><FONT lang=0 face="Book Antiqua" size=2 FAMILY="SERIF" PTSIZE="10">Dale Erwin--Piano Restorations<BR>4721 Parker Rd.<BR>Modesto, Calif 95357<BR>Shop 209-577-8397<BR>cell 209-985-0990 <BR></FONT><FONT lang=0 face="Book Antiqua" color=#000000 FAMILY="SERIF" PTSIZE="14"></FONT><FONT lang=0 face="Abadi MT Condensed" color=#000000 size=4 FAMILY="SANSSERIF" PTSIZE="14"><A href="http://www.Erwinspiano.com">http://www.Erwinspiano.com</A></FONT><FONT lang=0 face="Book Antiqua" color=#000000 size=2 FAMILY="SERIF" PTSIZE="10"><FONT face="Abadi MT Condensed" size=4> </FONT>Specializing in the Restoration, Service & Sales of<BR>Steinway, Mason & Hamlin, & other fine pianos</FONT></DIV></FONT></BODY></HTML>