[pianotech] Soundboard deflection - Pitch raise

[PAULREVENKOJONES at aol.com]

And unproved. David, where's the data?
 
P
 
 
In a message dated 8/4/2009 11:45:27 A.M. Central Daylight Time,  
AlliedPianoCraft at hotmail.com writes:

Interesting.
 
Al G
 
 

 
From: _David Love_ (mailto:davidlovepianos at comcast.net)  
Sent: Tuesday, August 04, 2009 10:05 AM
To: _pianotech at ptg.org_ (mailto:pianotech at ptg.org)  
Subject: Re: [pianotech] Soundboard deflection - Pitch  raise




Not  board deflection but plate contraction is the culprit.    
 
David  Love 
_www.davidlovepianos.com_ (http://www.davidlovepianos.com/) 
 
 
From: _pianotech-bounces at ptg.org_ (mailto:pianotech-bounces at ptg.org)   
[mailto:pianotech-bounces at ptg.org] On Behalf Of Al  Guecia/AlliedPianoCraft
Sent: Tuesday, August 04, 2009 4:19  AM
To: Pianotech List
Subject: [pianotech] Soundboard  deflection - Pitch raise

 
I did 2  pitch raises yesterday (new customers). One was at A-418 and the 
other was  A-420 before I started. What I found interesting was the amount of 
board  deflection. On one of the pianos (A-418), the first 3 notes (A-0, 
A#-0 &  B-0, were dead on, (go figure) on my first pass. I raised the pitch to 
440,  (some notes on this piano were 190 cents flat, wow!). On my second 
pass the  first 3 notes were about 10 cents flat. I was surprised that the 
board  deflected that much. No question here, just an observation I thought I'd 
 pass on.
 

 
Al  G
 

 





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