[pianotech] PR follow up

[David Love]

By soundboards rebounding do you mean that after you tune a piano from
considerably flat (pitch raise and then fine tune) that when you come back
to it the soundboard has rebounded and the pitch has gone sharp?



David Love
www.davidlovepianos.com


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of James Grebe
Sent: Saturday, August 29, 2009 7:08 AM
To: Ken & Pat Gerler; pianotech at ptg.org
Subject: Re: [pianotech] PR follow up

Hi Ken,
That is the kind of sensation I think happens over a period of days, 
segments moving slightly to equalize tension, soundboards rebounding from 
initial change
James Grebe Est. 1962
Piano Tuner-Technician
Creator of Custom Caster Cups
Creator of fine Writing Instruments
www.grebepiano.com
1526 Raspberry Lane
Arnold, MO 63010
(314) 608-4137
Become what you believe
----- Original Message ----- 
From: "Ken & Pat Gerler" <kenneth.gerler at prodigy.net>
To: <pianotech at ptg.org>
Sent: Saturday, August 29, 2009 8:56 AM
Subject: Re: [pianotech] PR follow up


I would add "bridge twisting" as on a pitch change the strings will not slip

evening over the lower bridges and they will gradually return to their rest 
position over a few weeks time (without heavy playing over an eight hour 
period).

Ken Gerler
  ----- Original Message ----- 
  From: PAULREVENKOJONES at aol.com
  To: pianotech at ptg.org
  Sent: Friday, August 28, 2009 7:01 PM
  Subject: Re: [pianotech] PR follow up


  The most general phrases that seems appropriate to start the discussion 
would be soundboard (de- and re-)compression over both bridges, and the 
string segmentation tension differentials. Seems enough. :-)

  Cheers,

  P

  In a message dated 8/28/2009 6:36:33 P.M. Central Daylight Time, 
davidlovepianos at comcast.net writes:
    Please explain the physics as you know it that would account for this.


----------------------------------------------------------------------------
--