Upright let-off jig

[David Ilvedson]

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Also Dave, Bill used a wedge like the Yamaha voicing block between the =
rail and the shanks to get the hammers up to the strings...doesn't matt=
er if hammer rail can go that far forward.  Also with the wedge/block y=
ou also got a click with the wink!

David Ilvedson, RPT
Pacifica, California






Original message
From: "David Ilvedson" 
To: pianotech@ptg.org
Received: 1/17/2006 7:54:11 AM
Subject: RE: Upright let-off jig


Dave,
I took a class from Bill years ago demonstrating that very procedure...=
it works!

David Ilvedson, RPT
Pacifica, California






Original message
From: Piannaman@aol.com
To: pianotech@ptg.org
Received: 1/12/2006 3:26:15 PM
Subject: Upright let-off jig


I'm sure someone's thought of this before, so forgive me if my idea is =
unoriginal!
 
For those of you who use Bill Spurlock's grand letoff jig, this should =
sound familiar.  Every upright has a built in let-off jig:  the hammer =
rail.  Today I was playing with a Hallet-Davis (Pearl River version) th=
at's about 3 years old.  It needed let-off regulation in a bad way, so =
I experimented with the hammer rest rail.  On this particular piano, I =
could push it far enough forward so the hammers were close to the strin=
gs, even ON the strings.  Some pianos won't allow for that much movemen=
t, but this one did.  
 
I set a some samples for letoff, then pushed the rail forward to the po=
int where those hammers would wink when I depressed the key.  I blocked=
 the rail so it stayed there, then adjusted the let-off to make the ham=
mers wink.  Worked like a charm.  
 
Pianos that won't allow for such free motion of the hammer rail may req=
uire something to clamp onto the rail for the shanks to rest on--the Sp=
urlock jig comes immediately to mind.
 
Hope this helps someone in some small way!
 
Dave Stahl

Dave Stahl Piano Service
650-224-3560
http://dstahlpiano.net/

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