PRs climbing sharper

[Farrell]

Value-added pitch raising? Hey, you're good! Other than that, you'll get no coherent explantion from me! Sounds like something is scroowy is St. Louey!

Terry Farrell
  
----- Original Message ----- 
From: <Tvak@aol.com>
To: <pianotech@ptg.org>
Sent: Tuesday, October 29, 2002 9:11 AM
Subject: PRs climbing sharper


> Here is something I've never seen mentioned in books or on the list but is a 
> consistent phenomenon to my experience.  When I return to a piano which had a 
> big pitch raise, I find that the piano is sharper than where I left it.  For 
> instance, yesterday, I returned to a piano that I raised 6 months ago from 
> 100 cents flat to A438 and found it at A440.  You could explain that by 
> factoring in the summer humidity in this case, but I find this to be true no 
> matter what time of year.  Tune it in the fall, come back in the spring 
> before the windows open up and it's still sharper than where it was tuned to. 
>  This phenomenon is so consistent that I now tune really flat pianos to A438. 
>  Otherwise, I play tag with A440 and have to lower the pitch on my return 
> visit.
> 
> This only happens after big pitch raises, of 35 cents or more.  I use RCT to 
> pitch raise; whether it takes two passes or one, either way, my last pass is 
> on a piano that is very close to the target pitch level.  
> 
> Comments?
> 
> Tom Sivak
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