Recrowning

[Richard Moody]

Curious to know the name of piano and where the shim (wedgie, I might
as well be the first one to make a crack on this one) was placed.
R Moody

----------
> From: Marcel Carey <mcpiano@multi-medias.ca>
> To: pianotech@byu.edu
> Subject: Re: Recrowning
> Date: Thursday, May 29, 1997 1:00 PM
>
> Dear List,
>
> I was saw a baby grand that had had that repair made (shim in the
bridge). I
> can assure you that the repair had NOT restored any sustain to the
board.
> The board maybe wasn't flat anymore, but it DIDN'T sound anything
close to a
> new soundboard. To me, this kind of repair is a loss of time and
customer's
> money.
>
> Marcel Carey, RPT
> Sherbrooke, QC
>
> At 07:48 97-05-29 -0700, you wrote:
> >Richard and list,
> >
> >AHA, there's the rub.
> >
> >Even if you put in multiple wedges, the crown so induced has a net
affect
> >only on the area of the board in the immediate vicnity of the
bridge.
> >(Leonard, among others talked about this, I am not sure if he
endorsed it.)
> >
> >
> >Also, "wedge" is a relative term.  In this case, it would be not
so much a
> >wedge as a shim, driven into a saw kerf after the board is jacked
up.  The
> >kerf, to be effective, would have to be made _prior_ to jacking up
the
> >board, so as to be more open when the crown is "corrected", thus
allowing a
> >larger wedge, which would, in turn, not only be more effectively
clamped in
> >place, but would create more "staying power" in the induced crown.
 The
> >placement of the kerfs should be determined during the taking of
your very
> >painstaking measurements...
> >
> >Like I said, just about as much trouble as installing a new board,
without
> >the benefits.
> >
> >Best.
> >
> >Horace
> >
> >
> >
> >>In reply, so as to keep the thread on Horace's comments, I seem
to
> >>remember Leonard Jared talking about placing a wedge in the
bridge
> >>ala keystone fashion. This would involve cutting the bridge in
such a
> >>way to insert this as I don't think he mentioned removing the
bridge.
> >> This is so vague in my memory, I am not sure of any other
details.
> >>Perhaps some one else has heard of this.  The soundboard had to
> >>"jacked up" the incision made (before or after?) in a
predetermined
> >>spot, the wedge inserted, and the sb let back down.  This was
only
> >>from "hearsay" and  was it from him even??
> >>	Even if this is a case of me not distingushing dreams from
reality,
> >>(is that why I perceive some saying, "Ah ha, he has let the cat
out
> >>of the bag?") on THINKing about this, more than one wedge might
be
> >>needed.  But where?  Also I would like to ask, how does the
bridge
> >>run in relation to the crown?
> >>
> >>Richard Moody
> >>
> >>"I wanted only to try to live in accord with the promptings
> >>which came from my true self.
> >>Why was that so very difficult?"
> >>Hermann Hesse  Demian
> >>
> >>
> >>Ever seen a wine cork placed between the wooden post and a rib?
> >>Probably to stop a buzz. Not the one created by uncorking the
wine
> >>bottle.   rm
> >>
> >>
> >>
> >>----------
> >>> From: Horace Greeley <hgreeley@leland.Stanford.EDU>
> >>> To: pianotech@byu.edu
> >>> Subject: Re: Recrowning
> >>> Date: Wednesday, May 28, 1997 8:08 PM
> >>>
> >>> Jon,
> >>>
> >>> Gee, I don't know, this is my fourth post to the list in one
day...
> >>>
> >>> You wrote:
> >>>
> >>> >I heard from a guy who claimed he can re-establish sound
> >>> >board crown with shims. Even if it has 3/8" negative crown.
> >>> >
> >>> >Can someone fill me in on what I might have missed in the
> >>> >last few years of trying to keep up with the last few hundred
> >>> >years?
> >>>
> >>> Sure - this is something a bunch of us retired a long time ago.
 It
> >>does
> >>> keep surfacing, however.
> >>>
> >>> So, now that you know what my prejudice is:
> >>>
> >>> While there are different methods, the deal is to disassemble
the
> >>piano,
> >>> usually invert it, wedge the board up by driving wedges(!)
between
> >>the
> >>> beams and ribs, then proceed with whatever repairs are in order
for
> >>the
> >>> board (shimming, etc.), then glue all in place (except for the
> >>wedges, of
> >>> course).
> >>> Among the variations I've seen/tried
> >>snip   see thread
> >
> >
> >
> >
> >Horace Greeley			hgreeley@leland.stanford.edu
> >
> >LiNCS				voice: 415/725-4627
> >Stanford University		fax: 415/725-9942
> >
> >
> >
>