[pianotech] Soundboard deflection - Pitch raise

[PAULREVENKOJONES at aol.com]

My answer was not a suggestion. It was a request for data to support your  
contention.
 
P
 
 
In a message dated 8/4/2009 7:26:02 P.M. Central Daylight Time,  
davidlovepianos at comcast.net writes:

 
Are  you suggesting that soundboard deflection is the cause for the 
predictable 25%  - 30% loss in the initial pitch correction even when that net 
change is  similar whether pianos have no crown and no bearing or quite a bit of 
crown  and ample bearing? 
 
David  Love 
www.davidlovepianos.com
 
 
From:  pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
Behalf Of  PAULREVENKOJONES at aol.com
Sent: Tuesday, August 04, 2009 2:46  PM
To: pianotech at ptg.org
Subject: Re: [pianotech]  Soundboard deflection - Pitch raise

 
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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