String coils affect stability?

[Richard Morgan]

Don, would you describe the "tapping" you mention, for this newbie?

All--This has been a fascinating thread for me, observing the give-and-take, the points and clarifications.  Your discussion has helped me visualize and understand the concepts presented.  Thanks!!

Richard Morgan


----- Original Message ----
From: Don <pianotuna at accesscomm.ca>
To: Pianotech List <pianotech at ptg.org>
Sent: Sunday, March 25, 2007 5:59:43 PM
Subject: Re: String coils affect stability?


Hi Ric,

I think the mechanism may be the height of the string leaving the pin. I
suspect flag poling of the pin is fairly important (more important that
most realize). The coils in any event are a small issue--and easy and quick
to tap. 

I do have one Samick grand piano that has tuning pins at all sorts of
different heights. It is infrequently serviced and always for performances.
I dread it and have often vowed I'd say *no* the next time they call. I
guess I'm too soft hearted or too stupid to say *no*.

At 10:23 PM 3/25/2007 +0100, you wrote:
>Interesting.  Don is one of those guys that pays attention to this kind 
>of detail... so if he says he's measured and observed some small 
>difference I certainly wont discount his claim out of hand.
>
>I dont see the mechanism that would achieve this tho... at least not 
>clearly.
>
>Cheers
>RicB
>
>    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
>
>
>
>-- 
>No virus found in this incoming message.
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3:27 PM
>
>
Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
Non calor sed umor est qui nobis incommodat

mailto:pianotuna at 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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