compression vs rib crowning

[Farrell]

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