String coils affect stability?

[Don]

Hi Ron,

I certainly would not let down the tension to tighten coils.

With respect, I have measured the difference in unison stability with
sloppy coils. There is a small but measureable difference, after lifting
coils and tapping them down to form nice tight coils on upright pianos that
are 50 years old and equipped with humidity control systems.

I routinely check each new client's piano by testing three pins. If there
is no pitch drop then I accept the coils. If any of the three change pitch
then I take the time to address the coils.

At 09:02 AM 3/25/2007 -0600, you wrote:
>
>> I have a Steinway M in my care that has been restrung/rebuilt.  The 
>> coils on the tuning pins are not drawn up tight, as I would expect.  Can 
>> this have an effect on stability?  Does it affect anything else?  Would 
>> there be any advantage (several years after the restringing--don't know 
>> how many) to backing off the tension, and retighten while lifting the 
>> coils?  Or would it be best to leave everything alone and just tune it?
>>  
>> Richard Morgan
>
>No effect on stability, once they are settled in. It's just 
>ugly and sloppy looking. I'll guess the tuning pins are 
>leaning WAY back at the magic 7° or more? Unless the looks of 
>it bothers the owner, I'd leave bad enough alone.
>Ron N
>
>
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Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
Non calor sed umor est qui nobis incommodat

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