Dale,
I’m 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? Isn’t 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. I’m not really adding the treble fish these days on soundboard
projects and without that I haven’t 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
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