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<DIV><FONT color=#0000ff face=Arial size=2><SPAN =
class=500400515-26092000>You
must have the correct curve in the tail. 3.5" radius. Draw a =
circle
using a protractor or string/ruler/pencil to see what it should look =
like.
There are tools available to do this with bench sanders but I use my eye =
and a
drill with a circular sanding disk while clamping one section at a =
time.
When correct the hammer should progressively get harder to push into the =
backcheck once in check. </SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=500400515-26092000></SPAN></FONT><FONT color=#0000ff =
face=Arial
size=2><SPAN class=500400515-26092000></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN =
class=500400515-26092000>David
I.</SPAN></FONT></DIV>
<DIV align=left class=OutlookMessageHeader dir=ltr><FONT =
face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> =
owner-pianotech@ptg.org
[mailto:owner-pianotech@ptg.org]<B>On Behalf Of </B>Tom =
Driscoll<BR><B>Sent:</B>
Tuesday, September 26, 2000 8:05 AM<BR><B>To:</B>
pianotech@ptg.org<BR><B>Subject:</B> Steinway checking
problems<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Fellow Techs< Seeking advice on =
checking
problems encountered when regulating older steinway actions> =
(Assuming
backchecks not worn)< Roughing tails has helped, angle changes =
of the
backcheck to steinway service manual diagrams helps also,but I still can =
get
some hammers bouncing off the backcheck.> <Balancier springs are =
not too
strong>Raising the height of the backcheck seems to be the most =
effective> Should I consider replacing backchecks with a taller =
profile
part? old wires replaced also or new backchecks on the origional
wires?> Thanks for your responses>< Tom
Driscoll></FONT></DIV></BODY></HTML>