brass v. iron

[Don]

Hi Roger,

I was speaking in terms of specific pianos--not in generalities....I agree
you can't predict from the lumber what a particular instrument will be
like. But the original post was a specific instrument.

At 07:58 PM 12/3/98 -0600, you wrote:
>
>>So I would disagree that humidity is *not* a factor. I would also disagree
>>with Roger how ever. You can give repeateable phenomina predict what the
>>wood will do. (Atleast to the tuning).
>
>Hi Don,
>             I would sure like to know the coefficient of linear expansion
>per degree for Sitka Spruce? IS there a coefficent of expansion for each
>percentage point of RH at a fixed temperature? NO. We get to know the
>personality of certain pianos that we very frequently work on, but the
>point I was making is that you can not calculate in cents the change due to
>humidity and temp. You have two D's at the Centre, do they react exactly
>the same? Maybe be some what similar, but not identical.
>Regards Roger 
>
>Roger Jolly
>Baldwin Yamaha Piano Centre
>Saskatoon and Regina
>Saskatchewan, Canada.
>306-665-0213
>Fax 652-0505
>
>
Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.
drose@dlcwest.com
http://www.dlcwest.com/~drose/
3004 Grant Rd.
REGINA, SK
S4S 5G7
306-352-3620 or 1-888-29t-uner