How to explain a pitch adjustment..and!

[pianolover 88]

<<Terry's statement about "excessive" pin movement is a bit misleading. It 
is
the change in tension that creates the instability.>>

That is precicley what I was saying! Sorry if it was not  clear.

Terry Peterson



----Original Message Follows----
From: Don <pianotuna@yahoo.com>
Reply-To: Pianotech <pianotech@ptg.org>
To: Pianotech <pianotech@ptg.org>
Subject: RE: How to explain a pitch adjustment..and!
Date: Wed, 21 Dec 2005 08:58:28

Hi Geoff,

The biggest single factor for instability is the metal plate flexing
possibly in the hitch pin area. There are many factors that contribute as
well but I believe the sum of their effects is less than plate flex.

I ver pull even on a 2 cent change at A4. If it is for a concert "do it
twice" comes into play almost immediately.

Terry's statement about "excessive" pin movement is a bit misleading. It is
the change in tension that creates the instability.

At 09:18 PM 12/20/2005 -0800, you wrote:
 >Am I correct that it is not the "excessive" pin movement that directly
 >precipitates the instability but the need of the soundboard to adjust to 
the
 >change in tension, whether from tuning or changes in humidity, that makes
 >for instability?

Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
Non calor sed umor est qui nobis incommodat

mailto:pianotuna@yahoo.com	http://us.geocities.com/drpt1948/

3004 Grant Rd. REGINA, SK, S4S 5G7
306-539-0716 or 1-888-29t-uner

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