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. ---------------------------------------------------------------------------- --
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