That would be David but it seems counterintuitive in one sense. The fish is designed to make it stiffer but it can be too stiff relative to mass evidently. Maybe someone with more theoretical knowledge can comment. David Love www.davidlovepianos.com From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Greg Newell Sent: Tuesday, April 28, 2009 7:36 AM To: caut at ptg.org Subject: Re: [CAUT] Soundboard weighting Dale, Im confused. If the purpose of the treble fish is to add stiffness why would you want to thin the board behind the bridge and before the fish? Is that negating the effect of the fish? I thought that the whole idea of the fish was to make a tighter system up there? Would thinning loosen it? Isnt the purpose of the mass weighting to add even more tightness / stiffness/ lack of flexibility? Greg Newell Greg's Piano Forté www.gregspianoforte.com 216-226-3791 (office) 216-470-8634 (mobile) From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of David Love Sent: Tuesday, April 28, 2009 10:29 AM To: caut at ptg.org Subject: Re: [CAUT] Soundboard weighting Where did they add it exactly? Del has contributed to this topic before and I wonder if he had anything to do with that. One other note, if you are able to know about how much mass loading in advance you can also bury some lead in the bridge body before you recap it. For us mortals, however, it seems to be more of a trial and error thing to find out how much you need exactly. Im not really adding the treble fish these days on soundboard projects and without that I havent found that mass loading is necessary. I also wonder on pianos with treble fish if thinning the board behind the treble bridge will reduce the need for weighting since it reduces the effective stiffness. David Love www.davidlovepianos.com From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of G Cousins Sent: Tuesday, April 28, 2009 6:34 AM To: CAUT Subject: Re: [CAUT] Soundboard weighting David, Baldwin did some production on their model 7000 with ading (weighted) mass to the board. Augmented the upper registers very efficiently. Yet another innovative design from the original Baldwin folk. Gerry -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut_ptg.org/attachments/20090428/86aad180/attachment-0001.html>
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