compression vs rib crowning

[Roger Jolly]

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Hi David,
                 The impression I got from him, is that he is using a blend 
of radius rib and some compression.
there is doubt that his boards work, and work well.

Roger



At 08:52 PM 3/10/2003 -0800, you wrote:
>My sense is that Bolduc builds boards to match in terms of fit, but that he
>has his own philosophy about how the boards are crowned to produce optimum
>tone.
>
>David Love
>davidlovepianos@earthlink.net
>
>
> > [Original Message]
> > From: Farrell <mfarrel2@tampabay.rr.com>
> > To: Pianotech <pianotech@ptg.org>
> > Date: 3/10/2003 8:32:03 PM
> > Subject: Re: compression vs rib crowning
> >
> > So are you saying that Andre builds his boards just like Steinway? And
>what does he do when he gets an order for an 1892 Knabe soundboard, or an
>A. B. Chase, or a Chickering, a Mason & Hamlin, a Decker Bros., etc. Does
>everyone make soundboards exactly the same? How does he know what the
>radius cut into each rib was originally? Or the MC at the time of rib/panel
>glue-up? I'm not picking on Andre, but anyone that "duplicates" old
>soundboards. I say you can't do it unless you know exactly what the radius
>of each rib was, the radius of any mold used during rib/panel glue-up, and
>the MC of the panel at rib/panel glue-up. Perhaps for Steinway, one can
>duplicate a board as this stuff I think is known. But I really don't think
>any of that is known about piano companies that went out of business 100
>years ago.
> >
> > So. How does Andre Bolduc or anyone else "duplicate" those boards? I say
>that they redesign them while keeping the appearance of the originals.
> >
> > Terry Farrell
> >
> > ----- Original Message -----
> > From: "Don" <pianotuna@accesscomm.ca>
> > To: <davidlovepianos@earthlink.net>; "Pianotech" <pianotech@ptg.org>
> > Sent: Monday, March 10, 2003 10:15 PM
> > Subject: Re: compression vs rib crowning
> >
> >
> > > Hi David,
> > >
> > > I can't speak for most of them--but Andre Bolduc feels very strongly
>that a
> > > duplicate board is *just that*. If you wish to redesign and send him
> > > "specs" I'm sure he would be pleased to make a rib crowned board for
> > > you--or if the piano had such a board in the first place he would
>"dupe" it.
> > >
> > > At 05:14 PM 3/10/2003 -0800, you wrote:
> > > >Why is it that those who make soundboards (duplicate readymades for
> > > >installation) don't make rib crowned boards?  Or do they?  The ones I
>know
> > > >of seem to only make compression boards.
> > > >
> > > >David Love
> > > >davidlovepianos@earthlink.net
> > > >
> > > >
> > > >> [Original Message]
> > > >> From: Ron Nossaman <RNossaman@cox.net>
> > > >> To: Pianotech <pianotech@ptg.org>; <davidlovepianos@earthlink.net>
> > > >> Date: 3/10/2003 4:54:11 PM
> > > >> Subject: Re: compression vs rib crowning
> > > >>
> > > >>
> > > >> >Is the difference between rib and compression crowning one of tone
>or
> > > >> >longevity (or both).
> > > >> >
> > > >> >David Love
> > > >>
> > > >> Longevity, predictability, control. All in favor of rib crowning.
> > > >>
> > > >> Ron N
> > > >
> > > >
> > > >
> > > >_______________________________________________
> > > >pianotech list info: https://www.moypiano.com/resources/#archives
> > > >
> > > >
> > >
> > > Regards,
> > > Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.
> > >
> > > mailto:pianotuna@accesscomm.ca
> > > http://us.geocities.com/drpt1948/
> > >
> > > 3004 Grant Rd.
> > > REGINA, SK
> > > S4S 5G7
> > > 306-352-3620 or 1-888-29t-uner
> > > _______________________________________________
> > > pianotech list info: https://www.moypiano.com/resources/#archives
> > _______________________________________________
> > pianotech list info: https://www.moypiano.com/resources/#archives
>
>
>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives

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