Yes I do, more so on larger pitch raises. Al G -------------------------------------------------- From: "David Ilvedson" <ilvey at sbcglobal.net> Sent: Friday, July 31, 2009 2:27 PM To: <pianotech at ptg.org> Subject: Re: [pianotech] String elongation/Fenner article > Has anyone found the second tension change on piano wire, i.e. pitch > raise...2 passes has less of the drop is pitch % as the first? > > David Ilvedson, RPT > Pacifica, CA 94044 > > ----- Original message ---------------------------------------- > From: "Jim Busby" <jim_busby at byu.edu> > To: pianotech at ptg.org > Received: 7/31/2009 10:21:43 AM > Subject: Re: [pianotech] String elongation/Fenner article > > >>Albert, > >>That was exactly my point, or the point I was trying to ask about with >>this article. >>But if this has been discussed a dozen times on Pianotech I shouldn't have >>posted it >>w/o looking back. > >>While Fenner indeed talks about break % and the usual stuff, this notion >>of length >>alone as "string elongation", aside from any tension issue in tuning >>stability, had me >>wondering... I'm studying it on my own (well, with Vince Mrykalo) and >>think it is an >>issue worth looking at. > >>Jim Busby RPT > >>From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On >>Behalf >>Of Albert Lord >>Sent: Thursday, July 30, 2009 9:35 PM >>To: pianotech at ptg.org >>Subject: Re: [pianotech] String elongation/Fenner article > > >>On Thu, Jul 30, 2009 at 1:18 PM, Ron Nossaman >><rnossaman at cox.net<mailto:rnossaman at cox.net>> wrote: >> The greater the elongation under the tension necessary to produce the >> required >>pitch, the higher the break%... > >>I read Fenner to say that longer non-speaking >>string segments also increase elongation and >>stability as you implied: >> the long front scale should mean that the overall string is longer, so >> the effect of a >>given string length change (seasonal, from wood reaction to humidity) has >>a >>relatively smaller affect on overall string tension, and the unisons >>should stay in tune >>better. > >>with no increase in breaking %age (speaking length >>and tension unchanged). So elongation and breaking >>%age are not always linked. Do I state this correctly? > >>Albert >
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