[CAUT] Re: Temperature and pitch

[Nichols]

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At 05:50 PM 3/2/2005 -0500, you wrote:
>Ed,
>
>The strings go sharp when they are cooler than the plate, and flat when
>they are warmer than the plate.  I happens fast - a matter of a very few
>minutes - even seconds if there is a draft.  If the piano has been
>subjected to a major temperature change, wait a few hours until everything
>in the piano has come to the same tempterture, and it should be back on
>pitch.  The cast iron plate and the steel strings have similar temperature
>coefficients.
>
>Jim Ellis

Jim,
    From the department of redundancy department, here we are again on this 
subject. Back on Feb. twenty-tooth, (subject: Mind-Bender), I was confused 
about one of your statements and I am still perplexed. I hope you can find 
time to help my two remaining brain cells understand what you mean when you 
say:

" If the piano has been
>subjected to a major temperature change, wait a few hours until everything
>in the piano has come to the same tempterture, and it should be back on 
>pitch."

Are you saying that if everything in the piano reaches the same 
temperature, even if that is a different temperature than where it started, 
that it will be back on pitch? Or do you mean that despite a "major" 
change, when the piano returns to it's original temperature it will be back 
on pitch?

Respectfully,
Guy Nichols, RPT

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