[pianotech] String elongation/Fenner article

[Laura Read]

Yes, same as Al.

Laura Read

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Al Guecia/AlliedPianoCraft
Sent: Friday, July 31, 2009 12:35 PM
To: David Ilvedson; pianotech at ptg.org
Subject: Re: [pianotech] String elongation/Fenner article

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
>