Fanned ribs (was Soundboard grain angle)

[Gary Teters]

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Hi Jon, I'd like to see any photo you have of this piano. What exactly =
are you doing to the counter bearing? I have one that is a little older. =
I like the bass, but the treble is a little weak at the high end. Last =
few notes before stepping onto the bass bridge have the usual thoinky =
kind of sound, would really like to get rid of that. I guess most =
uprights have a similar problem here.    Oh well,   Gary Teters
    -----Original Message-----
    From: Jon Page <jonpage@mediaone.net>
    To: pianotech@ptg.org <pianotech@ptg.org>
    Date: Thursday, December 06, 2001 11:15 AM
    Subject: Re: Fanned ribs (was Soundboard grain angle)
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    At 03:57 PM 12/6/2001 +0000, you wrote:
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        On Wed, 05 Dec 2001 15:56:42 =20
         Ron Nossaman wrote:
        >I decide first and last fan angles and
        >positioning by bridge placement and case shape, and eyeball =
everything else
        >in between - avoiding those nose bolts and accommodating bass =
bridge
        >placement. There isn't a vanishing point for the fan, nor is it =
necessary.
        >
        >Ron N
        >
        Ron,
        Do your ribs fan out from a point on the bent side, like the =
ones shown on the sketch
        sent out by Del a couple of days ago?  Why do you feel you get =
better results with a
        fan arrangement rather than parallel ribs, varying their spacing =
and properties?
       =20
        Phil F
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    The 1893 M&H Screwstringer upright currently in my shop has an =
interesting grain and cutoff bar application.
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    The grain runs about 90=B0 to the bridge in the tenor section (42=B0 =
to the bottom; as viewed from the back)
    The ribs run roughly 27=B0 to the grain through this section (69=B0 =
to the bottom).
    The cutoff bar(s) form a sort of a tear-drop shape encompassing the =
main board/bridge area.
    I can send a jpg of it to anyone interested.
   =20
    I am hopeful to the improvement in tone that repairing the split rib =
and the loose board over the cutoff bar as well as
    eliminating the 0 counterbearing in the high treble. I replaced the =
stripped screws in the counterbearing bar with longer ones.
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    Regards,
   =20
    Jon Page,   piano technician
    Harwich Port, Cape Cod, Mass.
    mailto:jonpage@mediaone.net
    http://www.stanwoodpiano.com
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