[pianotech] Won't stay in tune

[Mike Kurta]

    Also check to see that the hitch pin end of the string is not slipping due to a loose twist.  I had this happen once on a new string.  Mark the string with a felt pen and watch to see if there is a change making the string longer under tension.
    Mike Kurta
  ----- Original Message ----- 
  From: Tom Gorley 
  To: pianotech at ptg.org 
  Cc: noahfrere at gmail.com 
  Sent: Thursday, December 06, 2012 1:35 AM
  Subject: Re: [pianotech] Won't stay in tune


  Noah, check that the becket is not pulling out.  If the string is not inserted all the way thru the Tuning-pin hole it will withdraw under tension.


       Tom Gorley
    Registered Piano Technician    
          (650) 948-9522






  On Dec 5, 2012, at 1:15 PM, pianotech-request at ptg.org wrote:



    Message: 2
    Date: Wed, 5 Dec 2012 16:15:37 -0500
    From: Noah Frere <noahfrere at gmail.com>
    To: pianotech at ptg.org
    Subject: [pianotech] Won't Stay in Tune
    Message-ID:
    <CABKkihoKiQ4d+ocUwbt92Gd6=ADjkWrrqaU4JR2kW4g2MMt3Tg at mail.gmail.com>
    Content-Type: text/plain; charset="iso-8859-1"

    I just restrung a 1908 Whitney 3/4 plate tall Upright, with new bridge pins
    epoxied in using a syringe, ad 4/0 tuning pins. The pins are tight. I
    repeat, the middle string on F#6 has a TIGHT tuning pin, tight bridge pins,
    and a tight hitch pin. The string wraps around and comes up the right side
    as the right string.

    Sounds good, right? No - that note (and the center string of A#7) will not
    stay in tune for even 4 seconds! You can just hear it drop as you strike
    the string, like a miracle (or the opposite thereof.) The other notes,
    including the outside strings of F#6 and A#7 are fine.


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