Piano Technicians Guild, Los Angeles, CA Chapter
Piano Technicians Guild
Los Angeles Chapter


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The Rubenstein R-371The David Rubenstein R-371
It's Finished! (August 2005)

David RubensteinDavid Rubinstein, a local artisan and woodworker, has brought forth his own take on how to build a piano. His version has 21 ribs, a ½ in thick steel plate a ½ in thick sound board slightly tapered at the edges and has the longest string at 3,000 mm (that is 1,200 in or 10 feet).

His aim in construction of the case is to solidly isolate the soundboard with a heavily built but elegant looking case to avoid sound leakage into the case. With an 11 foot long lid he has chosen to split the lid and support it with two props and a bevel cut between the sections to keep them level, along the idea of an upright action split damper lift rail.

All of the rails keys, key frame, damper heads, and damper tray works are his own construction. Some parts of his action are normal supplier materials such as the sharps, whippens, shanks, flanges and pedals. The rest of the trap work and lyre are also one-of-a-kind.

Update - February, 2006: Visit the official David Rubenstein website for complete information: www.rubensteinpianos.com


Click on the thumbnails for a larger view.

Piano designDavid RubensteinString scale designDelwin Fandrich
Length o'all12' 2", 3710 mmTotal weight2500 Lbs.
Longest string3000 mmShortest string54 mm
CompassCCC - C5Total wrapped strings29
Monochords13Bichords16
Bass stringsJames ArledgePlain wireRöslau
Dampers81Damper materialBubinga
KeysSitka spruceAction, HammersRenner
BeamsSitka spruceCross barsRock maple
Key bedBaltic birch 52 mmSound board, RibsSitka spruce
Number of ribs21Bridges, CapRock maple
Sound board taper1/2" - 3/8"Pin blockBolduc
Inner rim -
bent side
Eastern rock maple
18 ply, 2 1/4" thick
Outer rim -
bent side
Birch
20 ply, 1 1/4" thick
Inner rim -
straight side
Rock maple
10 ply, 2 1/2" thick
Outer rim -
straight side
Baltic birch ply, 1 1/2"
Inner and Outer
rim heights
175 mm, 355 mmCut off (dumb bar)Curved laminated
rock maple
PlateWaterjet cut
MIG welded steel
  

Photos on this page © David Rubenstein. Used with permission.