<!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 6.00.2716.2200" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Why does the high treble scale not = have slightly thinner, somewhat longer strings? It seems to me that the = short speaking lengths would contribute to lack of sustain, excess hammer sound vs. musical tone, difficulty in tuning etc.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>If breakability is a principal reason, = could not the action be modified at that end with more let-off or = such.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I am fully aware that this question = probably is naive, based on my limited experience, so I brace myself for incoming ...</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Alan Barnard</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=baldyam@sk.sympatico.ca = href="mailto:baldyam@sk.sympatico.ca">jolly roger</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> Sunday, September 15, = 2002 2:00 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Upright and Grand = rims, was: Impressive Steinway Upright</DIV> <DIV><BR></DIV><FONT size=3><BR>Hi = Del,<BR>          &nbsp= ;  Nice drawing, kind of in line with some of my ideas of theoretical = centreing of bridges for grands.<BR> What we tend to forget is that, the = vibrations spread out from the bridge like a pebble thrown into a Mill pond. In a = grand, because of the strike line and the position of the belly rail, the = bridge is far from centred.  Some of this problem may be alleviated by = varying the rib height. Thinner to the short side, taller to the long side.<BR>The = design of the case and action position of vertical pianos will always give = more flexibility than in a grand.<BR> The thickness of the belly rail = joint ( reflector ) to the board in the top treble is going to be a problem, = along with where the bridge is fixed, vs the hammer line.<BR> Lots of = tap dancing is done in the extreme treble to get  better sustain, = duplexing, undercutting the bridge,etc.  Ever tried putting an apron up = there? I know off the wall.mmmmmmmmm  Shoot me I am being = revolutionary.<BR>With accujust  hitch pins to reduce board loading in a controlled = manner, along with an apron, and finally a variable height rib, we could = theoretically centre that bridge.<BR> Sunday musings. <BR>Roger   <BR> <BLOCKQUOTE class=cite cite="" type="cite">Good (no, excellent) = explanation so far.<BR><BR>But it's not any super-secret shape--though it is patented--and it has been<BR>pretty well developed. A jpg drawing of = the soundboard assembly as used in<BR>our upright is = attached.<BR><BR>Del<BR><BR><BR>_________________________________________= ______<BR>pianotech list info: <A href="https://www.moypiano.com/resources/#archives" = = eudora="autourl">https://www.moypiano.com/resources/#archives</A></FON= T></BLOCKQUOTE><BR></BLOCKQUOTE></BODY></HTML>