Mason&Hamlin A board replacement

[Marcel Carey]

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Thanks for the info,
Comments inserted below
  -----Original Message-----
  From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On Behalf Of
Erwinspiano@AOL.COM
  Sent: 8 aout, 2002 11:06
  To: pianotech@ptg.org
  Subject: Re: Mason&Hamlin A board replacement


  In a message dated 8/7/2002 5:35:26 PM Pacific Daylight Time,
mcpiano@globetrotter.net writes:



    Subj:Mason&Hamlin A board replacement
    Date:8/7/2002 5:35:26 PM Pacific Daylight Time
    From:mcpiano@globetrotter.net
    Reply-to:pianotech@ptg.org
    To:pianotech@ptg.org
    Sent from the Internet

               Marcel


          It would be simple enough to discard the apron and move the bass
bridge forward as far as the plate will allow  which would allow the
backscale length some improvement. Yes, the bass strings would be a bit
shorter but you'd gain back scale length. The mono chord section which needs
it most desperately.
  The plate doesn't leave much room for discarding the apron. I would at the
most gain about 2 cm.

       On one of the two As I did last year I did what I call a partial
float at the end of the tenor bridge which was done by drawing a line from
one end of the maple cap piece on the board to the other end, installing a
small rib on the bottom underneath the line and a thin maple strip over it
on the top for a little reinforcing. I made the cut after the auxiliary ribs
were on.

  What thickness  was your bottom rib (was this one spruce in the bottom)
and the maple one on top?

      I'm not advocating any one do this but just sharing my own journey.
I'm sure there are other ideas and methods that have more merit "floating"
around in cyber space.
        Dale Erwin




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