[pianotech] Soundboard deflection - Pitch raise

[David Love]

Not board deflection but plate contraction is the culprit.  

 

David Love

www.davidlovepianos.com

 

From: 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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