<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="metricconverter"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style> </head> <body lang=FR link=blue vlink=purple> <div class=Section1> Joe,<o:p></o:p> <o:p> </o:p> A small Erard Square from 1804 that I’ve been restoring this year (with the original sound board) has a nice tone and a long sustain.<o:p></o:p> It is a verry small soundboard and the string pressure moved the board downward causing a dip around the bridge.<o:p></o:p> Except for this the piano was remarquably well preserved (wich is not often the case) and I suppose for that reason that the is still good enough to produce a good sound. (the piano is tuned at 390 hz)<o:p></o:p> <o:p> </o:p> Regards,<o:p></o:p> <o:p> </o:p> <st1:PersonName ProductID="Pierre Gevaert" w:st="on">Pierre <st1:PersonName w:st="on">Gevaert</st1:PersonName></st1:PersonName><o:p></o:p> <o:p> </o:p> P.s. Concerning the regulating of this double pilot action from Erard (we exchanged some words about it last year) I had quite good results with a key dip of <st1:metricconverter ProductID="6 mm" w:st="on">6 mm</st1:metricconverter> and quite a bit of lost motion between the upper pilot and the hammer shank.<o:p></o:p> The funny thing about this type of action without escapement is that you can repeat a same note verry fastly and close to the string and thus produce a fast tremolo.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> -----Message d'origine----- De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] De la part de Joseph Garrett Envoyé : samedi 19 août 2006 18:07 À : John Delacour; <st1:PersonName w:st="on">Pianotech List</st1:PersonName> Objet : Re: Brash Failure <o:p> </o:p> John,<o:p></o:p> Have you, in your clientele list, a piano of an 1805 age? If not, then you<o:p></o:p> would not know of what I speak. How about 1814? No? same answer. As for the<o:p></o:p> "petrification of wood, we all will not live long enough to find out if it<o:p></o:p> will happen. However, I have seen many examples of many different types of<o:p></o:p> wood that cannot be repaired due to the cellular breakdown of the wood<o:p></o:p> itself. All things deteriorate. (period) IMO Just because you, personally,<o:p></o:p> have not experienced this, does not mean that it isn't so.<o:p></o:p> <o:p> </o:p> Joseph Garrett, R.P.T.<o:p></o:p> Captain, Tool Police<o:p></o:p> Squares R I<o:p></o:p> <o:p> </o:p> <o:p> </o:p> > [Original Message]<o:p></o:p> > From: John Delacour <JD@Pianomaker.co.uk><o:p></o:p> > To: <joegarrett@earthlink.net>; <st1:PersonName w:st="on">Pianotech List</st1:PersonName> <pianotech@ptg.org><o:p></o:p> > Date: 8/19/2006 2:52:10 AM<o:p></o:p> > Subject: Re: Brash Failure<o:p></o:p> ><o:p> </o:p> > At 9:27 pm -0700 18/8/06, Joseph Garrett wrote:<o:p></o:p> ><o:p> </o:p> > >Perhaps you need more diverse experience.<G> Some of your <o:p></o:p> > >suppositions are not valid, IMO.<o:p></o:p> ><o:p> </o:p> > I'm not surprised you should say so, Joe, since on Saturday, October <o:p></o:p> > 23, 2004 Joseph Garrett wrote:<o:p></o:p> ><o:p> </o:p> > >The one thing that gets me to NOT want to do a re-ribbing of an olde <o:p></o:p> > >board, is the fact that wood does age. Forget the compression factor <o:p></o:p> > >for now. Let's just consider this: In the aging process of wood, it <o:p></o:p> > >loses it's cellular cohesion/bonding. At some point, this aging <o:p></o:p> > >process creates what is known as Brash Failure. If wood is kept in a <o:p></o:p> > >consistant environment, it will eventually turn to stone, (ie <o:p></o:p> > >petrify). The Brash Failure occurs about half way to the petriying <o:p></o:p> > >stage.<o:p></o:p> ><o:p> </o:p> > Now while I recognise that my experience may not be as diverse as <o:p></o:p> > yours, I have never seen or heard of any piece of wood in a piano <o:p></o:p> > that has turned to stone in any "consistant environment" in which a <o:p></o:p> > piano can survive. By your reckoning you are familiar with some <o:p></o:p> > pianos that are well on their way to petrification. Since my <o:p></o:p> > suppositions are invalid, according to you, I suppose you will be <o:p></o:p> > glad to point us to a web site or some learned volume that will <o:p></o:p> > validate your own rather interesting theory.<o:p></o:p> ><o:p> </o:p> > JD<o:p></o:p> ><o:p> </o:p> ><o:p> </o:p> ><o:p> </o:p> ><o:p> </o:p> ><o:p> </o:p> > -- <o:p></o:p> > No virus found in this incoming message.<o:p></o:p> > Checked by AVG Free Edition.<o:p></o:p> > Version: 7.1.405 / Virus Database: 268.11.3/423 - Release Date: 8/18/2006<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> </div> </body> </html>