<!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></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV> </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=bradley@rice.edu href="mailto:bradley@rice.edu">Bradley = M. Snook</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, May 27, 2003 = 12:08 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Backchecking = Height</DIV> <DIV><BR></DIV> <DIV>Does anyone have a method for regulating the height of = backchecking so that<BR>the results are very even?<BR><BR>Bradley M. Snook<BR>Graduate = Student in Piano Technology (M.Mus)<BR>Rice University, Shepherd School of = Music<BR><BR>_______________________________________________<BR>pianotech= list info: <A = href="https://www.moypiano.com/resources/#archives">http://www.ptg.org= /mailman/listinfo/pianotech</A></DIV> <DIV> </DIV> <DIV>Well, a lot of other stuff has to be in good shape and well = regulated, namely the whole action, but especially key height and key dip; =  and then let-off and repetition spring strength to a lesser extent.  Backchecks have to be aligned to hammer tails, the backcheck angle has = to be uniform, etc.   Variations in pinning of the hammer flanges = will have an effect.  It's easier to attain in a newer action than an = old one, usually.  But even, consistent backchecking is one of the results = of a well-regulated action</DIV> <DIV>    --David Nereson, RPT<BR></DIV></BLOCKQUOTE></BODY></HTML>