Now look at what I got started. Considering it was a Wurlitzer spinet with probably no (or very little) crown to start and a (relatively) flimsy plate, I'm sure that would support plate contraction rather than soundboard deflection. I stand corrected. Al G From: David Love Sent: Wednesday, August 05, 2009 1:38 AM To: pianotech at ptg.org Subject: Re: [pianotech] Soundboard deflection - Pitch raise I think one can safely remove soundboard deflection as one of the variables for reasons already stated. That leaves rim (bracing included) and plate. Since the two are interlinked then the contraction of one must also mean the contraction of the other. But since the tension is born by the plate which is supported by the rim it should be safe to assume that the initial contraction takes place in the plate. If one wants to, I'm sure it can be measured, though I haven't done it. Personally, I'm satisfied with the conclusion but I fully support those who wish to take it to the next level and provide the raw data. David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of PAULREVENKOJONES at aol.com Sent: Tuesday, August 04, 2009 9:24 PM To: pianotech at ptg.org Subject: Re: [pianotech] Soundboard deflection - Pitch raise No so much a suggestion of ambiguity, for there is none, just a wish for a clearer idea of the depth of the conclusions which can be drawn without accounting for all variables. Grasshopper? :-) P -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090805/77c012f6/attachment-0001.htm>
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