Upright let-off jig

[Joe And Penny Goss]

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Hi,
Add to that the dimples in the hammer rest rail cloth being very uneven.
Joe Goss RPT
Mother Goose Tools
imatunr@srvinet.com
www.mothergoosetools.com
  ----- Original Message -----=20
  From: Dean May=20
  To: 'An open list for piano technicians'=20
  Sent: Friday, January 13, 2006 8:19 AM
  Subject: RE: Upright let-off jig


  Sounds like a great plan for a newer piano without a lot of wear. What =
I have found, though, when working on older pianos what haven't been =
regulated forever is that there are dimples worn in the letoff buttons. =
On such pianos I will only turn the letoff screws in 180 degree =
increments, preferably 360 degree increments unless I know I can be back =
for follow up adjustments. If you stop some place in between then the =
heel of the jack is rubbing on a high spot and you'll end up with =
hammers blocking when you come back the next year.=20

  =20

  By limiting adjustments to 180 degree turns it is difficult to set the =
hammers to just wink uniformly off a set up as Dave describes.=20

  =20

  Dean

  Dean May             cell 812.239.3359

  PianoRebuilders.com   812.235.5272

  Terre Haute IN  47802

  =20

  -----Original Message-----
  From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On =
Behalf Of Piannaman@aol.com
  Sent: Thursday, January 12, 2006 11:26 PM
  To: pianotech@ptg.org
  Subject: Upright let-off jig

  =20

  I'm sure someone's thought of this before, so forgive me if my idea is =
unoriginal!

  =20

  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) =
that'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 =
strings, even ON the strings.  Some pianos won't allow for that much =
movement, but this one did. =20

  =20

  I set a some samples for letoff, then pushed the rail forward to the =
point 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 hammers wink.  Worked like a charm. =20

  =20

  Pianos that won't allow for such free motion of the hammer rail may =
require something to clamp onto the rail for the shanks to rest on--the =
Spurlock jig comes immediately to mind.

  =20

  Hope this helps someone in some small way!

  =20

  Dave Stahl

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

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