[CAUT] pre-stretching new string?

[Ed Sutton]

Wegman and Wurlitzer (and perhaps other companies) made pianos with cast iron pinblocks.  Tuning records on these pianos might reveal something.
ES
  ----- Original Message ----- 
  From: Daniel Gurnee 
  To: Cy Shuster ; College and University Technicians 
  Sent: Saturday, June 09, 2007 5:29 PM
  Subject: Re: [CAUT] pre-stretching new string?


  Cy S.

  My experience with S&S Ds and Bs, Bs especially indicates a strong possibility of pin block expansion and contraction. The longer strings, pins farther from the flange will raise more with increase humidity indicating to me that a greater expanse of wood will go farther than that closer to the flange. Another indication is the greater stability of the left string compared with the center and right strings which often in a touchup are the only ones requiring attention with a weather change.

  Dan Gurnee HSU Ret


  On Saturday, June 9, 2007, at 07:16 AM, Cy Shuster wrote:



    If the pinblock is bedded to the plate flange, I can't see how wood expansion could allow any pins to move closer to the flange.
     
    Don, it seems that your reply was about the bridge, but my question was about the pinblock's response to humidity.
     
    --Cy--

    ----- Original Message -----
    From: Paul T Williams
    To: Cy Shuster ; College and University Technicians
    Sent: Friday, June 08, 2007 8:26 AM
    Subject: Re: [CAUT] pre-stretching new string?


    Cy,
    Wouldn't a sponge-like swelling also cause the closer pin to move closer to the hitch pin? or stay close to the same since it would move up and out from center of bridge core...

    Paul

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/caut.php/attachments/20070609/3f39793e/attachment.html