why does a string go out of tune?

[David Ilvedson]

I agree with Don that mf is plenty of power for tuning stability.   You might consider going through your tunings twice.  I believe you tune pretty fast...?   
Are you tuning unisons as you go?   As an experiment, consider slowing way down and carefully making "tiny" changes to the tuning pin.   This sounds like tuning technique.    Find someone at the National who doesn't pound and take a one on one class.   Wim, your finger joints WILL wear out before their time.   It ain't worth it...

David I.


----- Original message ---------------------------------------->
From: Don <pianotuna@accesscomm.ca>
To: College and University Technicians <caut@ptg.org>
Received: Sat, 10 Apr 2004 15:12:59 -0600
Subject: Re: why does a string go out of tune?

>Hi Wim,

>They go out of "unison" for more than one reason. Look at the bridge and
>the placement of the pins, they don't have equal amounts of wood towards
>the sounding length. Also look at the pin block. The pins do wobble back
>and forth with humidity changes and those with the shortest length will
>change the tension more. One interesting side effect of using *lots* of CA
>on blocks is better unison stability. The pins seem much less affected by
>changes in humidity in the short term. I do always recommend a dc system
>when I CA. If not then the piano will (in my climate) become untuneable again.

>I try to set pins and strings with no more than a mf sound level. I learned
>the hard way that pounding can be detrimental to good long term stability.


>At 03:35 PM 4/10/04 EDT, you wrote:
>>   In a message dated 4/10/2004 2:00:24 PM Central Standard Time,
>>
>>  humidity causes pitch instability, why just one one string? Why not in
>>all of them? Why do some strings go up, and other go down?   Wim  

>Regards,
>Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
>Tuner for the Center of the Arts

>mailto:pianotuna@accesscomm.ca
>http://us.geocities.com/drpt1948/

>3004 Grant Rd.
>REGINA, SK
>S4S 5G7
>306-352-3620 or 1-888-29t-uner
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