Decker Bros. Damper Action Possible Solutions

• 

• 

• 

• 

  Dot indicates contact point of spoon. Pencil line indicates portion of key that extends over damper tray.

• 

  Mounting block for spoon made from trimmed back check.

Decker Bros. Concert Grand Additional

• 

• 

• 

• 

• 

1885 Decker Bros. Concert Grand – Damper action

Primitive damper action, instead of a lever the dampers rise on two pins. There is less than two inches clearance between the wires and the back of the belly cavity, making replacement with a modern action unlikely. 

1885 Decker Bros. Concert Grand – Before

Oversized key slip screw stuck in case.

Oversized screw stuck in case.

 

Dowell Capstans on both keys and let off rail.

Irregular repaired key buttons.

Irregular repaired key buttons.

Endblocks previously repaired. Oversized and stripped screws. Missing wood previously repaired. Bent fallboard bracket. 

 

Someone has drilled secondary screw holes in the end blocks. 

Endblock screw holes from beneath the key bed.

 

End block screw holes in key bed, bass end.

End block screw holes in key bed, treble end.

Treble end block, oversized screws. Key frame stop screw is “cocked”.

Bass end endblock with oversized screws. Block and bracket bear down on key frame and make una corda pedal resistant to push and return.

Loose or stripped screws in long lid hinge.

Key frame has a pull bar for removal.

Existing treble hammer left with very little felt at peak.

Hammer-string alignment incorrect and double strike lines from alteration.

Multiple strike points from realignment without hammer resurfacing 

Hammer filed to an angle which doesn’t properly mate with strings.

 

Irregular shaped hammers, multiple strike lines.

 

Steinway flange shape but not quite a Steinway mounting rail. Hammer flanges are standard flat type.

Key ends are scalloped with no lifter felts, felts are instead on under side of damper levers.

Irregular hammer flanges are just slightly off on dimensions. The one of the right is a previous replacement and is the correct size.

 

Wooden action frame with hammer rail removed. This was a previously converted rocker action. Geometry is way off making the action feel extremenly heavy by modern standards.

Key stop rail mounts are glued to the frame.

Individual wooden action brackets remove with one screw each.

At first glance there appear to be key frame guide adjustment posts, but they are just support posts for the key stop rail.

Cracked dowell capstan.

That’s a LOT of lead!

Another cracked dowell capstan.

Each key has a hole which may have previously contained a lead weight. Addition empty screw holes from old rocker action.

Cracked key frame.

Another crack in key frame at opposite end.

 

Bottom of key frame. This has no adjustable key frame glides.

Bracket extends past the back of the key frame (treble end).

Damper tray lift lever on bass end.

Close up of bass end.

Treble end lifter tray extension.

Wooden una corda shifter, typically these are iron or steel.

Key bed treble end.

Key bed center.

Key frame in place with bass end block. Frame butts up against the block towards the back. Frame also rocks on this end and when the block is tightened it bears down, causing resistance to sliding.

Bass end action mount is offset slightly to allow for damper tray lift lever. 

Treble end action mount is positioned to clear the tray lifter mount. 

Treble end block in place with empty key frame.

Key slip rail had to be shimmed to allow for plastic key fronts which are thicker than the original would have been.

Steinway “A” Rebuilding Update

Bass bridge

Soundboard finish

Treble bridge

Installing cast iron plate with a chain hoist.

Dowel rods guide plate into place

Lowering plate over pinblock.

Lowering plate

Plate in place

Drilling pinblock screw holes

Location of tuning pins holes marked with a transfer punch

Drilling the tuning pin holes

Cold Gun supplies a stream of chilled air to the drill bit

Dowel

Cold gun

Damper guide rails

Plate and pinblock permanently installed

Application of Model Letter A and serial number

Application of stringing scale (string sizes)

Cutting of understring plate felts

Steinway A Soundboard Final Finishing and Beginning Brass Polishing

Steinway A Plate Refinishing

Spraying gold leaf finish.

Sanding the primed surface.

Shellac primer.

Cleaning dirt off plate

Steinway A Pinblock Carving and Fitting

High spots on the block are indicated by chalk. Note how not only the back of the block but also the top has to be carved to fit snugly to the plate.

High spots on the back of the block.

This photo shows the top and back of the block.

High spots on the top of the block.

The block is placed on the underside of the plate, and tapping with a mallet transfers chalk from the plate onto the block indicating high spots.

Chalk is rubbed along the plate underside and flange.

“Carving” away the high spots with a Dremel tool. Typically the whole procedure is repeated 3 or 4 dozen times, so the labor involved is considerable. Many rebuilders will simply over cut the block and then fill in the gap with epoxy, but this is cutting corners and is risky in the long run, to say the least.

Fitting the block to the cabinet interior. When installed the block will be dowelled multiple times around the perimeter and glued as well. Once the plate is installed and fastened to the block, the cabinet, block and plate will act as a single unit, contributing to tuning stability.

Steinway A Soundboard Restoration Part One

Sanding the board

Hairline crack to be repaired.

Beautiful piece of spruce…

Tenor and bass bridges.

Treble bridge.

Restoring the “Crown” of the soundboard – necessary for proper downbearing of strings and as a result pleasing tone quality and sustain.

The straightedge shows that the board is crowned or curved.

Any way I lay the ruler there is ample crown.

Underneath the soundboard are a series of “ribs” which support it. These run perpendicular to the grain of the soundboard.

Masking the graphite surface of the bridge for applying sprayed finish.

I estimate there are over 350 individual pieces of tape needed to accomplish the task.

Properly rebuilding the soundboard and restoring its crown is essential. Replacing the board will ruin its tone quality, and is not necessary to begin with as the photos demonstrate.

Steinway A (c. 1930) – Installing New Anodized Aluminum Key Pins

Installing new Key Pins on a 1930 Steinway A. Manufactured by Wessell Nickel & Gross, part of the company that makes Mason & Hamlin Pianos, these key pins are anodized aluminum, which unlike nickel plated steel pins, will never tarnish or rust through the plating. Anodized aluminum is also super slick, and when polished or lubricated they will stay slick indefinitely, unlike nickel plated pins which begin to tarnish and cause friction almost immediately.

Preparing the table and drill press

Removing the old key pins

Inserting the nylon bushings 1

Inserting the nylon bushings 2

Inserting the nylon bushings 3

Drilling the nylon bushings

New Front Rail Pins