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Calin & All
Here are a few pictures of the S.S. O & S.S.long A design. In the O
picture it's more instructive to see the bridge layout over the actual rib
structure. You can see that the angle of the rib to the board grain getting steeper
& the ribs fanning to stay paralell with the bridge. It's plain to see just
how much chorter & stiffer the longest ribs were & now are.
Ron N. & O your comments about the tone getting stronger in the second
half of the tone envelope are right on. The bridge has also been moved back at
the top treble so that the note 88 could get a 50 mm string length increasing
tension & power. This is sop on all redo. ON the A I even ground the plate.
The original string length on the A was shockingly short at about 46mm &
was changed to 54mm at 88
Dale Erwin
Erwins Pianos Restorations
4721 Parker Rd.
Modesto, Ca 95357
209-577-8397
Rebuilt Steinway , Mason &Hamlin Sales
www.Erwinspiano.com
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