Facts and nots : was Recommend Rebuilder?

[Marcel Carey]

I have questions. Is it possible that the pianos made before the 50s
were made using wood that was seasoned more? Is it possible that the
fast drying of the spruce that is used today has changed the way it will
swell and shrink with time? If a piece of lumber is seasoned for a few
years, would that change the way it will react to humidity swings? Maybe
manufacturers are just producing these units too fast.

Only questions, but I'd rather be in dout than beleive in lies.

Marcel Carey, RPT
Sherbrooke, QC

> -----Message d'origine-----
> De : pianotech-bounces at ptg.org 
> [mailto:pianotech-bounces at ptg.org] De la part de RicB
> Envoyé : 22 mars 2007 15:45
> À : pianotech at ptg.org
> Objet : Facts and nots : was Recommend Rebuilder?
> 
> 
> Del just reminded us of his article series on the subject, and as I 
> understand the reasoning and what factual material he presents, 
> compression ridges are simply bound to form in significant numbers 
> whenever the compression crowned soundboard method is used.  
> CC boards 
> and variants have been made for-like-ever so either Del is 
> wrong, which 
> he isnt, or ridges have been around as long as boards have been made 
> this way... and quite likely in similar numbers.  Better materials in 
> the past (if thats indeed true to begin with) could perhaps influence 
> that picture somewhat... but the principles of compression crowning 
> remain the same.
> 
> Cheers
> RicB
> 
> 
>     I guess the older Steinways were not manufactured 
> correctly, as I don't
>     recollect any mention of this before.  So obviously, they just
>     learned to
>     make them correctly. :-)
>     John M. Ross
>     Windsor, Nova Scotia, Canada
>     jrpiano at win.eastlink.ca
> 
>